FN Thomson Reuters Web of Science™
VR 1.0
PT S
AU Erkmen, BI
   Dahl, JR
   Barber, ZW
AF Erkmen, Baris I.
   Dahl, Jason R.
   Barber, Zeb W.
GP IEEE
TI Performance Analysis for FMCW Ranging Using Photon-Counting Detectors
SO 2013 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
SE Conference on Lasers and Electro-Optics
LA English
DT Proceedings Paper
CT Conference on Lasers and Electro-Optics (CLEO)
CY JUN 09-14, 2013
CL San Jose, CA
AB We analyze the performance of FMCW ranging with photon-counting detectors. We derive the Cramer-Rao bound, then determine the optimal fraction of signal-arm photons, given a fixed mean number of source-generated photons. (C) 2013 Optical Society of America
C1 [Erkmen, Baris I.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
   [Dahl, Jason R.; Barber, Zeb W.] Montana State Univ, Spectrum Lab, Bozeman, MO 59717 USA.
RP Erkmen, BI (reprint author), CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
EM baris.i.erkmen@jpl.nasa.gov
NR 4
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2160-9020
BN 978-1-55752-973-2
J9 CONF LASER ELECTR
PY 2013
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BC7WX
UT WOS:000355262502289
ER

PT S
AU Gerrits, T
   Marsili, F
   Verma, VB
   Stevens, MJ
   Stern, JA
   Shaw, M
   Mirin, RP
   Nam, SW
AF Gerrits, T.
   Marsili, F.
   Verma, V. B.
   Stevens, M. J.
   Stern, J. A.
   Shaw, M.
   Mirin, R. P.
   Nam, S. W.
GP IEEE
TI Joint Spectral Measurements at the Hong-Ou-Mandel Interference Dip
SO 2013 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
SE Conference on Lasers and Electro-Optics
LA English
DT Proceedings Paper
CT Conference on Lasers and Electro-Optics (CLEO)
CY JUN 09-14, 2013
CL San Jose, CA
AB We employed a 2-channel single-photon detection system with high detection efficiency and low jitter to characterize the joint spectral probability distribution of correlated photons emerging from a Hong-Ou-Mandel interference arrangement. The high detection efficiency allows simultaneous measurement of all frequency components emerging from the source. The results show that the photons show an evolution from bunching to anti-bunching by the entangling beamsplitter of the HOM interferometer.
C1 [Gerrits, T.; Marsili, F.; Verma, V. B.; Stevens, M. J.; Mirin, R. P.; Nam, S. W.] NIST, Boulder, CO 80305 USA.
   [Stern, J. A.; Shaw, M.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
RP Gerrits, T (reprint author), NIST, 325 Broadway,MC 815-04, Boulder, CO 80305 USA.
EM Gerrits@boulder.nist.gov
NR 4
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2160-9020
BN 978-1-55752-973-2
J9 CONF LASER ELECTR
PY 2013
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BC7WX
UT WOS:000355262504009
ER

PT S
AU Huang, H
   Ren, YX
   Xie, GD
   Yan, Y
   Yue, Y
   Ahmed, N
   Lavery, MPJ
   Padgett, MJ
   Dolinar, S
   Willner, AE
AF Huang, Hao
   Ren, Yongxiong
   Xie, Guodong
   Yan, Yan
   Yue, Yang
   Ahmed, Nisar
   Lavery, Martin P. J.
   Padgett, Miles J.
   Dolinar, Sam
   Willner, Alan E.
GP IEEE
TI Tunable Filter for Orbital-Angular-Momentum Multiplexed Optical Channels
SO 2013 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
SE Conference on Lasers and Electro-Optics
LA English
DT Proceedings Paper
CT Conference on Lasers and Electro-Optics (CLEO)
CY JUN 09-14, 2013
CL San Jose, CA
AB A tunable orbital angular momentum (OAM) mode filter is proposed. Filtering/blocking selected channels from 4 spatially multiplexed OAM channels is demonstrated. An OSNR penalty of <2 dB is observed when using the filter for 100 Gb/s QPSK data channels.
C1 [Huang, Hao; Ren, Yongxiong; Xie, Guodong; Yan, Yan; Yue, Yang; Ahmed, Nisar; Willner, Alan E.] Univ So Calif, Dept Elect Engn, Los Angeles, CA 90089 USA.
   [Lavery, Martin P. J.; Padgett, Miles J.] Univ Glasgow, Sch Phys & Astron, Glasgow, Lanark, Scotland.
   [Dolinar, Sam] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
RP Huang, H (reprint author), Univ So Calif, Dept Elect Engn, Los Angeles, CA 90089 USA.
EM haoh@usc.edu
RI Lavery, Martin/H-2265-2015
NR 6
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2160-9020
BN 978-1-55752-973-2
J9 CONF LASER ELECTR
PY 2013
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BC7WX
UT WOS:000355262504124
ER

PT S
AU Li, D
   Sun, G
   Ding, YJJ
   Prasad, NS
AF Li, Da
   Sun, Guan
   Ding, Yujie J.
   Prasad, Narasimha S.
GP IEEE
TI Long-wavelength-pumped single-photon detector based on frequency
   up-conversion in MgO-doped periodically-poled LiNbO3 waveguide reaching
   ultralow dark count rates
SO 2013 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
SE Conference on Lasers and Electro-Optics
LA English
DT Proceedings Paper
CT Conference on Lasers and Electro-Optics (CLEO)
CY JUN 09-14, 2013
CL San Jose, CA
ID 1550 NM; EFFICIENT
AB We implemented single-photon detector in 1500-nm band based on frequency up-conversion in nonlinear waveguide at pump wavelength of 1920 nm. Ultralow dark count rate and signal photon detection rate are 20 s(-1) and 56.8 s(-1). (C) 2013 Optical Society of America
C1 [Li, Da; Sun, Guan; Ding, Yujie J.] Lehigh Univ, Dept Elect & Comp Engn, Bethlehem, PA 18015 USA.
   [Prasad, Narasimha S.] NASA, Langley Res Ctr, Laser Remote Sensing Branch, Hampton, VA 23681 USA.
RP Li, D (reprint author), Lehigh Univ, Dept Elect & Comp Engn, Bethlehem, PA 18015 USA.
EM yud2@lehigh.edu
NR 6
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2160-9020
BN 978-1-55752-973-2
J9 CONF LASER ELECTR
PY 2013
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BC7WX
UT WOS:000355262502069
ER

PT S
AU Marsili, F
   Verma, VB
   Stern, JA
   Harrington, S
   Lita, AE
   Gerrits, T
   Vayshenker, I
   Baek, B
   Shaw, MD
   Miller, AJ
   Mirin, RP
   Nam, SW
AF Marsili, F.
   Verma, V. B.
   Stern, J. A.
   Harrington, S.
   Lita, A. E.
   Gerrits, T.
   Vayshenker, I.
   Baek, B.
   Shaw, M. D.
   Miller, A. J.
   Mirin, R. P.
   Nam, S. W.
GP IEEE
TI Superconducting Nanowire Single Photon Detectors with High System
   Detection Efficiency at Telecom Wavelengths
SO 2013 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
SE Conference on Lasers and Electro-Optics
LA English
DT Proceedings Paper
CT Conference on Lasers and Electro-Optics (CLEO)
CY JUN 09-14, 2013
CL San Jose, CA
AB We report on a fiber-coupled eight-channel single-photon-detection system employing superconducting nanowire single-photon detectors (SNSPDs) based on amorphous tungsten silicide (WSi) with system detection efficiency ranging from 81 to 89 % at 1550 nm wavelength.
C1 [Marsili, F.; Verma, V. B.; Harrington, S.; Lita, A. E.; Gerrits, T.; Vayshenker, I.; Baek, B.; Mirin, R. P.; Nam, S. W.] NIST, Boulder, CO 80305 USA.
   [Stern, J. A.; Shaw, M. D.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
   [Miller, A. J.] Albion Coll, Dept Phys, Albion, MI 49224 USA.
RP Marsili, F (reprint author), NIST, 325 Broadway,MC 815-04, Boulder, CO 80305 USA.
EM francesco.marsili@nist.gov
NR 9
TC 0
Z9 0
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2160-9020
BN 978-1-55752-973-2
J9 CONF LASER ELECTR
PY 2013
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BC7WX
UT WOS:000355262504015
ER

PT S
AU Marsili, F
   Verma, VB
   Stevens, MJ
   Stern, JA
   Shaw, MD
   Miller, AJ
   Schwarzer, D
   Wodtke, A
   Mirin, RP
   Nam, SW
AF Marsili, F.
   Verma, V. B.
   Stevens, M. J.
   Stern, J. A.
   Shaw, M. D.
   Miller, A. J.
   Schwarzer, D.
   Wodtke, A.
   Mirin, R. P.
   Nam, S. W.
GP IEEE
TI Mid-Infrared Single-Photon Detection with Tungsten Silicide
   Superconducting Nanowires
SO 2013 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
SE Conference on Lasers and Electro-Optics
LA English
DT Proceedings Paper
CT Conference on Lasers and Electro-Optics (CLEO)
CY JUN 09-14, 2013
CL San Jose, CA
AB We developed superconducting nanowire single-photon detectors (SNSPDs) based on tungsten silicide (WSi), that show saturated internal detection efficiency from 2.1 to 5.5 mu m wavelength.
C1 [Marsili, F.; Verma, V. B.; Stevens, M. J.; Mirin, R. P.; Nam, S. W.] NIST, Boulder, CO 80305 USA.
   [Stern, J. A.; Shaw, M. D.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
   [Miller, A. J.] Albion Coll, Dept Phys, Albion, MI 49224 USA.
   [Schwarzer, D.; Wodtke, A.] Max Planck Inst Biophys Chem, D-37077 Gottingen, Germany.
RP Marsili, F (reprint author), NIST, 325 Broadway,MC 815-04, Boulder, CO 80305 USA.
EM francesco.marsili@nist.gov
NR 5
TC 0
Z9 0
U1 2
U2 3
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2160-9020
BN 978-1-55752-973-2
J9 CONF LASER ELECTR
PY 2013
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BC7WX
UT WOS:000355262502283
ER

PT S
AU Pliutau, D
   Prasad, NS
AF Pliutau, Denis
   Prasad, Narasimha S.
GP IEEE
TI Cross-band Relative Absorption Technique for Molecular Mixing Ratio
   Determination
SO 2013 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
SE Conference on Lasers and Electro-Optics
LA English
DT Proceedings Paper
CT Conference on Lasers and Electro-Optics (CLEO)
CY JUN 09-14, 2013
CL San Jose, CA
AB We describe a new approach for molecular mixing ratio measurements based on spectral lines matching of various molecules with oxygen resulting in substantial reductions of temperature and pressure induced errors and close weighting functions matching.
C1 [Pliutau, Denis; Prasad, Narasimha S.] NASA, Langley Res Ctr, Hampton, VA 23681 USA.
RP Pliutau, D (reprint author), NASA, Langley Res Ctr, 5 N Dryden St,MS 468, Hampton, VA 23681 USA.
EM narasimha.s.prasad@nasa.gov
NR 4
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2160-9020
BN 978-1-55752-973-2
J9 CONF LASER ELECTR
PY 2013
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BC7WX
UT WOS:000355262503199
ER

PT S
AU Ren, YX
   Huang, H
   Xie, GD
   Ahmed, N
   Yan, Y
   Erkmen, B
   Chandrasekaran, N
   Lavery, MPJ
   Steinhoff, NK
   Tur, M
   Padgett, MJ
   Boyd, R
   Shapiro, JH
   Willner, AE
AF Ren, Yongxiong
   Huang, Hao
   Xie, Guodong
   Ahmed, Nisar
   Yan, Yan
   Erkmen, Baris
   Chandrasekaran, Nivedita
   Lavery, Martin P. J.
   Steinhoff, Nicholas K.
   Tur, Moshe
   Padgett, Miles J.
   Boyd, Robert
   Shapiro, Jeffrey H.
   Willner, Alan E.
GP IEEE
TI Experimental Turbulence Effects on Crosstalk and System Power Penalty
   over a Free Space Optical Communication Link using Orbital Angular
   Momentum Multiplexing
SO 2013 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
SE Conference on Lasers and Electro-Optics
LA English
DT Proceedings Paper
CT Conference on Lasers and Electro-Optics (CLEO)
CY JUN 09-14, 2013
CL San Jose, CA
ID ATMOSPHERIC-TURBULENCE; LIGHT; STATES
AB Turbulence-induced crosstalk and system penalty for an OAM-multiplexed free space optical communication link is experimentally investigated. The power penalty is found to exceed 10 dB in weak turbulence condition due to severe crosstalk. (C) 2013 Optical Society of America
C1 [Ren, Yongxiong; Huang, Hao; Xie, Guodong; Ahmed, Nisar; Yan, Yan; Willner, Alan E.] Univ So Calif, Dept Elect Engn, Los Angeles, CA 90089 USA.
   [Erkmen, Baris] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
   [Chandrasekaran, Nivedita; Shapiro, Jeffrey H.] MIT, Elect Res Lab, Cambridge, MA 02139 USA.
   [Lavery, Martin P. J.; Padgett, Miles J.] Univ Glasgow, Sch Phys & Astron, Glasgow G12 8QQ, Lanark, Scotland.
   [Steinhoff, Nicholas K.] Opt Sci Co, Anaheim, CA 92825 USA.
   [Tur, Moshe] Tel Aviv Univ, Sch Elect Engn, IL-69978 Tel Aviv, Israel.
   [Boyd, Robert] Univ Rochester, Dept Phys & Astron, Inst Opt, Rochester, NY 14627 USA.
RP Ren, YX (reprint author), Univ So Calif, Dept Elect Engn, Los Angeles, CA 90089 USA.
EM yongxior@usc.edu
RI Lavery, Martin/H-2265-2015
NR 12
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2160-9020
BN 978-1-55752-973-2
J9 CONF LASER ELECTR
PY 2013
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BC7WX
UT WOS:000355262501233
ER

PT S
AU Shaw, MD
   Stern, JA
   Birnbaum, K
   Srinivasan, M
   Cheng, M
   Quirk, K
   Biswas, A
   Marsili, F
   Verma, VB
   Mirin, RP
   Nam, SW
   Farr, WH
AF Shaw, M. D.
   Stern, J. A.
   Birnbaum, K.
   Srinivasan, M.
   Cheng, M.
   Quirk, K.
   Biswas, A.
   Marsili, F.
   Verma, V. B.
   Mirin, R. P.
   Nam, S. W.
   Farr, W. H.
GP IEEE
TI Tungsten Silicide Superconducting Nanowire Arrays for the Lunar Laser
   OCTL Terminal
SO 2013 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
SE Conference on Lasers and Electro-Optics
LA English
DT Proceedings Paper
CT Conference on Lasers and Electro-Optics (CLEO)
CY JUN 09-14, 2013
CL San Jose, CA
ID DETECTOR
AB We have developed 12-pixel arrays of fiber-coupled tungsten silicide superconducting nanowire single photon detectors and performed end-to-end tests of a 39 Mbps pulse position modulation optical communication link with a software receiver.
C1 [Shaw, M. D.; Stern, J. A.; Birnbaum, K.; Srinivasan, M.; Cheng, M.; Quirk, K.; Biswas, A.; Farr, W. H.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
   [Marsili, F.; Verma, V. B.; Mirin, R. P.; Nam, S. W.] NIST, Boulder, CO 80305 USA.
RP Shaw, MD (reprint author), CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
EM matthew.d.shaw@jpl.nasa.gov
NR 6
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2160-9020
BN 978-1-55752-973-2
J9 CONF LASER ELECTR
PY 2013
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BC7WX
UT WOS:000355262505091
ER

PT S
AU Strekalov, DV
   Kowligy, AS
   Huang, YP
   Kumar, P
AF Strekalov, Dmitry V.
   Kowligy, Abijith S.
   Huang, Yu-Ping
   Kumar, Prem
GP IEEE
TI Observation of Quantum Zeno Blockade in chi((2)) Microresonators
SO 2013 CONFERENCE ON LASERS AND ELECTRO-OPTICS (CLEO)
SE Conference on Lasers and Electro-Optics
LA English
DT Proceedings Paper
CT Conference on Lasers and Electro-Optics (CLEO)
CY JUN 09-14, 2013
CL San Jose, CA
AB We report observing all-optical modulation with a contrast of 80% via quantum Zeno blockade in a Lithium Niobate whispering-gallery-mode resonator at a pump peak power of 100 mu W. (C) 2013 Optical Society of America
C1 [Strekalov, Dmitry V.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
   [Kowligy, Abijith S.; Huang, Yu-Ping; Kumar, Prem] Northwestern Univ, Ctr Photon Commun & Comp, Dept EECS, Evanston, IL 60208 USA.
RP Strekalov, DV (reprint author), CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
EM dmitry.v.strekalov@jpl.nasa.gov
NR 0
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2160-9020
BN 978-1-55752-973-2
J9 CONF LASER ELECTR
PY 2013
PG 2
WC Engineering, Electrical & Electronic; Optics; Physics, Applied
SC Engineering; Optics; Physics
GA BC7WX
UT WOS:000355262505271
ER

PT J
AU Zhang, J
   Li, ZP
   Sandoval, O
   Xin, NA
   Ren, Y
   Martin, RA
   Iannucci, B
   Griss, M
   Rosernberg, S
   Cao, JD
   Rowe, A
AF Zhang, Jia
   Li, Zhipeng
   Sandoval, Oscar
   Xin, Norman
   Ren, Yuan
   Martin, Rodney A.
   Iannucci, Bob
   Griss, Martin
   Rosernberg, Steven
   Cao, Jordan
   Rowe, Anthony
GP IEEE
TI Supporting Personizable Virtual Internet of Things
SO 2013 IEEE 10TH INTERNATIONAL CONFERENCE ON AND 10TH INTERNATIONAL
   CONFERENCE ON AUTONOMIC AND TRUSTED COMPUTING (UIC/ATC) UBIQUITOUS
   INTELLIGENCE AND COMPUTING
LA English
DT Proceedings Paper
CT IEEE 10th International Conference on Ubiquitous Intelligence and
   Computing (UIC) / IEEE 10th International Conference on Autonomic and
   Trusted Computing (ATC)
CY DEC 18-21, 2013
CL Sorrento Peninsula, ITALY
SP IEEE
AB This paper reports on the design and development of an HTML5-powered Virtual Sensor Editor (VSE) over the Internet of Things cloud. VSE is a scalable tool that allows users to design virtual sensors with user-defined dataflow logic, by visually aggregating existing sensors, either physical sensors or other user-defined virtual sensors. VSE supports a real-time and historical visualization of sensor values and analytical studies, and is a cross-platform and customizable tool equipped with ability to support verifiable sensor data service composability. A discussion on design decisions is presented. Our preliminary work has been applied to NASA Ames' Sustainability Base for smart building monitoring. Preliminary performance and scalability study is also reported.
C1 [Zhang, Jia; Li, Zhipeng; Sandoval, Oscar; Xin, Norman; Ren, Yuan; Iannucci, Bob; Griss, Martin; Rosernberg, Steven] Carnegie Mellon Univ Silicon Valley, Moffett Field, CA 94035 USA.
   [Martin, Rodney A.] NASA, Ames Res Ctr, Ames, IA USA.
   [Cao, Jordan] SAP, Hoffman, IL USA.
   [Rowe, Anthony] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA.
RP Zhang, J (reprint author), Carnegie Mellon Univ Silicon Valley, Moffett Field, CA 94035 USA.
EM jia.zhang@sv.cmu.edu; rodney.martin@nasa.gov; bob@sv.cmu.edu;
   martin.griss@sv.cmu.edu; steven.rosenberg@sv.cmu.edu;
   jordan.cao@sap.com; anthony.rowe@cmu.edu
FU SAP to Carnegie Mellon University; NASA [NASA NNX12AQ95G, NNX13AD49A]
FX This project is partially sponsored by research gift provided by SAP to
   Carnegie Mellon University; as well as NASA grant NASA NNX12AQ95G and
   NNX13AD49A.
NR 16
TC 1
Z9 1
U1 1
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4799-2481-3
PY 2013
BP 329
EP 336
DI 10.1109/UIC-ATC.2013.48
PG 8
WC Computer Science, Artificial Intelligence; Computer Science, Theory &
   Methods; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA BB7YS
UT WOS:000346129800044
ER

PT S
AU Ono, M
   Topcu, U
   Yo, M
   Adachi, S
AF Ono, Masahiro
   Topcu, Ufuk
   Yo, Masaki
   Adachi, Shuichi
GP IEEE
TI Risk-Limiting Power Grid Control with an ARMA-Based Prediction Model
SO 2013 IEEE 52ND ANNUAL CONFERENCE ON DECISION AND CONTROL (CDC)
SE IEEE Conference on Decision and Control
LA English
DT Proceedings Paper
CT 52nd IEEE Annual Conference on Decision and Control (CDC)
CY DEC 10-13, 2013
CL Florence, ITALY
SP Honeywell, MathWorks, Springer, Taylor & Francis, Univ Trieste, Elsevier, GE Global Res, Natl Instruments, PendCon, Soc Ind & Appl Math, Wolfram, Journal Franklin Inst, United Technologies Res Ctr, Danieli Automat
ID ELECTRICITY DEMAND
AB This paper is concerned with the risk-limiting operation of electric power grids with stochastic uncertainties due to, for example, demand and integration of renewable generation. The main contribution is incorporating auto-regressive-moving-average (ARMA) type prediction models for the underlying uncertainties into chance-constrained, finitehorizon optimal control. This uncertainty model leads to a more (compared to existing work in literature) careful treatment of correlation in time which is significant especially in renewable generation yet has attracted limited attention. The paper first discusses how the resulting chance-constrained optimization problems can be solved computationally and demonstrates the effects of the use of the proposed prediction models through simulation-based case studies with realistic data.
C1 [Ono, Masahiro; Yo, Masaki; Adachi, Shuichi] Keio Univ, Tokyo 108, Japan.
   [Ono, Masahiro; Yo, Masaki] CREST, JST, Tokyo, Japan.
   [Ono, Masahiro] CALTECH, Jet Prop Lab, Pasadena, CA 91125 USA.
   [Topcu, Ufuk] Univ Penn, Dept Elect & Syst Engn, Philadelphia, PA 19104 USA.
RP Ono, M (reprint author), Keio Univ, Tokyo 108, Japan.
EM ono@jpl.nasa.gov; utopcu@seas.upenn.edu; masakiyo@a3.keio.jp
NR 20
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0743-1546
BN 978-1-4673-5717-3
J9 IEEE DECIS CONTR P
PY 2013
BP 4943
EP 4950
PG 8
WC Automation & Control Systems; Engineering, Electrical & Electronic
SC Automation & Control Systems; Engineering
GA BC4AR
UT WOS:000352223505093
ER

PT S
AU Bakowski, DL
   Hooey, BL
   Foyle, DC
   Wolter, CA
   Cheng, LWS
AF Bakowski, Deborah L.
   Hooey, Becky L.
   Foyle, David C.
   Wolter, Cynthia A.
   Cheng, Lara W. S.
GP IEEE
TI NextGen Surface Trajectory-Based Operations: Contingency-Hold Clearances
SO 2013 IEEE/AIAA 32ND DIGITAL AVIONICS SYSTEMS CONFERENCE (DASC)
SE IEEE-AIAA Digital Avionics Systems Conference
LA English
DT Proceedings Paper
CT IEEE/AIAA 32nd Digital Avionics Systems Conference (DASC)
CY OCT 05-10, 2013
CL New York, NY
SP IEEE, AIAA, BOEING, LRDC Systems LLC, SAAB, AVIONICS
C1 [Bakowski, Deborah L.; Hooey, Becky L.; Wolter, Cynthia A.; Cheng, Lara W. S.] San Jose State Univ, NASA, Ames Res Ctr, San Jose, CA 95192 USA.
   [Foyle, David C.] NASA, Ames Res Ctr, Mountain View, CA USA.
RP Bakowski, DL (reprint author), San Jose State Univ, NASA, Ames Res Ctr, San Jose, CA 95192 USA.
NR 14
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7195
BN 978-1-4799-1536-1; 978-1-4799-1538-5
J9 IEEEAAIA DIGIT AVION
PY 2013
PG 38
WC Engineering, Aerospace
SC Engineering
GA BC1KH
UT WOS:000350222203001
ER

PT S
AU Bakowski, DL
   Hooey, BL
   Foyle, DC
   Wolter, CA
   Cheng, LWS
AF Bakowski, Deborah L.
   Hooey, Becky L.
   Foyle, David C.
   Wolter, Cynthia A.
   Cheng, Lara W. S.
GP IEEE
TI NEXTGEN SURFACE TRAJECTORY-BASED OPERATIONS: CONTINGENCY-HOLD CLEARANCES
SO 2013 IEEE/AIAA 32ND DIGITAL AVIONICS SYSTEMS CONFERENCE (DASC)
SE IEEE-AIAA Digital Avionics Systems Conference
LA English
DT Proceedings Paper
CT IEEE/AIAA 32nd Digital Avionics Systems Conference (DASC)
CY OCT 05-10, 2013
CL New York, NY
SP IEEE, AIAA, BOEING, LRDC Systems LLC, SAAB, AVIONICS
AB The purpose of this pilot-in-the-loop taxi simulation was to investigate a NextGen Surface Trajectory-Based Operations (STBO) concept called "contingency holds." The contingency-hold concept parses a taxi route into segments, allowing an air traffic control (ATC) surface traffic management (STM) system to hold an aircraft when necessary for safety. Under nominal conditions, if the intersection or active runway crossing is clear, the hold is removed, allowing the aircraft to continue taxiing without slowing, thus improving taxi efficiency, while minimizing the excessive brake use, fuel burn, and emissions associated with stop-and-go taxi. However, when a potential traffic conflict exists, the hold remains in place as a fail-safe mechanism.
   In this departure operations simulation, the taxi clearance included a required time of arrival (RTA) to a specified intersection. The flight deck was equipped with speed-guidance avionics to aid the pilot in safely meeting the RTA. On two trials, the contingency hold was not released, and pilots were required to stop. On two trials the contingency hold was released 15 sec prior to the RTA, and on two trials the contingency hold was released 30 sec prior to the RTA. When the hold remained in place, all pilots complied with the hold. Results also showed that when the hold was released at 15-sec or 30-sec prior to the RTA, the 30-sec release allowed pilots to maintain nominal taxi speed, thus supporting continuous traffic flow; whereas, the 15-sec release did not. The contingency-hold concept, with at least a 30-sec release, allows pilots to improve taxiing efficiency by reducing braking, slowing, and stopping, but still maintains safety in that no pilots "busted" the clearance holds. Overall, the evidence suggests that the contingency-hold concept is a viable concept for optimizing efficiency while maintaining safety.
C1 [Bakowski, Deborah L.; Hooey, Becky L.; Wolter, Cynthia A.; Cheng, Lara W. S.] San Jose State Univ, Moffett Field, CA 94034 USA.
   [Foyle, David C.] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
RP Bakowski, DL (reprint author), San Jose State Univ, Moffett Field, CA 94034 USA.
NR 6
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7195
BN 978-1-4799-1536-1; 978-1-4799-1538-5
J9 IEEEAAIA DIGIT AVION
PY 2013
PG 11
WC Engineering, Aerospace
SC Engineering
GA BC1KH
UT WOS:000350222200011
ER

PT S
AU Chevalley, E
   Parke, B
   Lee, P
   Omar, F
   Lee, H
   Bienert, N
   Kraut, J
   Palmer, E
AF Chevalley, Eric
   Parke, Bonny
   Lee, Paul
   Omar, Faisal
   Lee, Hwasoo
   Bienert, Nancy
   Kraut, Joshua
   Palmer, Everett
GP IEEE
TI SCHEDULING AND SEPARATING DEPARTURES CROSSING ARRIVAL FLOWS IN SHARED
   AIRSPACE
SO 2013 IEEE/AIAA 32ND DIGITAL AVIONICS SYSTEMS CONFERENCE (DASC)
SE IEEE-AIAA Digital Avionics Systems Conference
LA English
DT Proceedings Paper
CT IEEE/AIAA 32nd Digital Avionics Systems Conference (DASC)
CY OCT 05-10, 2013
CL New York, NY
SP IEEE, AIAA, BOEING, LRDC Systems LLC, SAAB, AVIONICS
AB Flight efficiency and reduction of flight delays are among the primary goals of NextGen. In this paper, we propose a concept of shared airspace where departures fly across arrival flows, provided gaps are available in these flows. We have explored solutions to separate departures temporally from arrival traffic and pre-arranged procedures to support controllers' decisions. A Human-in-the-Loop simulation assessed the efficiency and safety of 96 departures from the San Jose airport (SJC) climbing across the arrival airspace of the Oakland and San Francisco arrival flows. In the simulation, the SJC tower had a tool to identify departures that could fly through predicted gaps in the arrival flow. When the timing of departures did not align with gaps in the arrival flows and separation could not be ensured, a safe but less efficient route was provided to the departures to fly underneath the arrival flows. Coordination using a point-out procedure allowed the arrival controller to control the SJC departures right after take-off. The simulation manipulated the accuracy of departure time (accurate vs. inaccurate) as well as which sector took control of the departures after takeoff (departure vs. arrival sector) in a 2x2 full factorial design. Results show that coordination time decreased and climb efficiency increased when the arrival sector controlled the aircraft right after takeoff. Also, climb efficiency increased when the departure times were more accurate. Coordination was shown to be a critical component of tactical operations in shared airspace. Although workload, coordination, and safety were judged by controllers as acceptable in the simulation, it appears that in the field, controllers would need improved tools and coordination procedures to support this procedure.
C1 [Chevalley, Eric; Parke, Bonny; Lee, Paul; Omar, Faisal; Lee, Hwasoo; Bienert, Nancy; Kraut, Joshua] San Jose State Univ, NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
   [Palmer, Everett] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
RP Chevalley, E (reprint author), San Jose State Univ, NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
NR 11
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7195
BN 978-1-4799-1536-1; 978-1-4799-1538-5
J9 IEEEAAIA DIGIT AVION
PY 2013
PG 16
WC Engineering, Aerospace
SC Engineering
GA BC1KH
UT WOS:000350222200021
ER

PT S
AU Daniels, TS
   Schaffner, PR
   Evans, ET
   Young, SD
AF Daniels, Taumi S.
   Schaffner, Philip R.
   Evans, Emory T.
   Young, Steven D.
GP IEEE
TI MOTION-BASED PILOTED FLIGHT SIMULATION TEST RESULTS FOR A REALISTIC
   WEATHER ENVIRONMENT
SO 2013 IEEE/AIAA 32ND DIGITAL AVIONICS SYSTEMS CONFERENCE (DASC)
SE IEEE-AIAA Digital Avionics Systems Conference
LA English
DT Proceedings Paper
CT IEEE/AIAA 32nd Digital Avionics Systems Conference (DASC)
CY OCT 05-10, 2013
CL New York, NY
SP IEEE, AIAA, BOEING, LRDC Systems LLC, SAAB, AVIONICS
AB A flight simulation environment was enhanced to facilitate experiments that evaluate research prototypes of advanced onboard weather radar, hazard / integrity monitoring (HIM), and integrated alerting and notification (IAN) concepts in adverse weather conditions. The simulation environment uses weather data representing actual conditions in an airport terminal area. A simulated atmospheric environment was realized using numerical weather data sets produced from the High-Resolution Rapid Refresh (HRRR) model hosted and run by the National Oceanic and Atmospheric Administration (NOAA). To align with the planned flight simulation experiment requirements, several HRRR data sets were acquired courtesy of NOAA. These data sets coincided with severe weather events at the Memphis International Airport (MEM) in Memphis, TN. In addition, representative flight tracks for approaches and departures at MEM were generated and used to develop and test simulations of (1) what onboard sensors such as the weather radar would observe; (2) what data links of weather information would provide; and (3) what atmospheric conditions the aircraft would experience (e.g. turbulence, winds, and icing).
   Results from the use of the enhanced flight simulation environment during the piloted experiments will be presented. A weather radar display was utilized by the test subject pilots in both weather and turbulence modes. The radar capabilities and the pilot controls simulated current-generation commercial weather radar systems. Data linked weather advisories were also provided to the pilots consistent with Next Generation Air Transportation System (NextGen) concepts of use for Aeronautical Information Service (AIS) and Meteorological (MET) data link products. Additional results of the simulation experiments included verification that the weather environment supports investigations of new flight deck information systems, flight deck integration of weather information, and pilot interfaces.
C1 [Daniels, Taumi S.; Schaffner, Philip R.; Evans, Emory T.; Young, Steven D.] NASA Langley Res Ctr, Hampton, VA 23681 USA.
RP Daniels, TS (reprint author), NASA Langley Res Ctr, Hampton, VA 23681 USA.
NR 12
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7195
BN 978-1-4799-1536-1; 978-1-4799-1538-5
J9 IEEEAAIA DIGIT AVION
PY 2013
PG 15
WC Engineering, Aerospace
SC Engineering
GA BC1KH
UT WOS:000350222201040
ER

PT S
AU Evans, ET
   Young, SD
   Daniels, TS
   Myer, RR
AF Evans, Emory T., Jr.
   Young, Steven D.
   Daniels, Taumi S.
   Myer, Robert R.
GP IEEE
TI USABILITY OF EFBS FOR VIEWING NOTAMS AND AIS/MET DATA LINK MESSAGES
SO 2013 IEEE/AIAA 32ND DIGITAL AVIONICS SYSTEMS CONFERENCE (DASC)
SE IEEE-AIAA Digital Avionics Systems Conference
LA English
DT Proceedings Paper
CT IEEE/AIAA 32nd Digital Avionics Systems Conference (DASC)
CY OCT 05-10, 2013
CL New York, NY
SP IEEE, AIAA, BOEING, LRDC Systems LLC, SAAB, AVIONICS
AB Electronic Flight Bags (EFB) are increasingly integral to flight deck information management. A piloted simulation study was conducted at NASA Langley Research Center, one aspect of which was to evaluate the usability and acceptability of EFBs for viewing and managing Notices to Airmen (NOTAMs) and data linked aeronautical information services (AIS) and meteorological information (MET).
   The study simulated approaches and landings at Memphis International Airport (KMEM) using various flight scenarios and weather conditions. Ten two-pilot commercial airline crews participated, utilizing the Cockpit Motion Facility's Research Flight Deck (CMF/RFD) simulator. Each crew completed approximately two dozen flights over a two day period.
   Two EFBs were installed, one for each pilot. Study data were collected in the form of questionnaire/interview responses, audio/video recordings, oculometer recordings, and aircraft/system state data.
   Preliminary usability results are reported primarily based on pilot interviews and responses to questions focused on ease of learning, ease of use, usefulness, satisfaction, and acceptability. Analysis of the data from the other objective measures (e.g., oculometer) is ongoing and will be reported in a future publication.
   This paper covers how the EFB functionality was set up for the study; the NOTAM, AIS/MET data link, and weather messages that were presented; questionnaire results; selected pilot observations; and conclusions.
C1 [Evans, Emory T., Jr.; Young, Steven D.; Daniels, Taumi S.] NASA, Langley Res Ctr, Hampton, VA 23665 USA.
   [Myer, Robert R.] SGT Inc, Hampton, VA USA.
RP Evans, ET (reprint author), NASA, Langley Res Ctr, Hampton, VA 23665 USA.
NR 12
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7195
BN 978-1-4799-1536-1; 978-1-4799-1538-5
J9 IEEEAAIA DIGIT AVION
PY 2013
PG 13
WC Engineering, Aerospace
SC Engineering
GA BC1KH
UT WOS:000350222200030
ER

PT S
AU Evans, E
   Young, S
   Daniels, T
   Myer, R
AF Evans, Emory (Tom)
   Young, Steven
   Daniels, Taumi
   Myer, Robert
GP IEEE
TI Usability of EFBs for Viewing NOTAMs and AIS/MET Data Link Messages
SO 2013 IEEE/AIAA 32ND DIGITAL AVIONICS SYSTEMS CONFERENCE (DASC)
SE IEEE-AIAA Digital Avionics Systems Conference
LA English
DT Proceedings Paper
CT IEEE/AIAA 32nd Digital Avionics Systems Conference (DASC)
CY OCT 05-10, 2013
CL New York, NY
SP IEEE, AIAA, BOEING, LRDC Systems LLC, SAAB, AVIONICS
C1 [Evans, Emory (Tom); Young, Steven; Daniels, Taumi] NASA, Langley Res Ctr, Hampton, VA 23665 USA.
   [Myer, Robert] SGT Inc, Hampton, VA USA.
RP Evans, E (reprint author), NASA, Langley Res Ctr, Hampton, VA 23665 USA.
EM e.t.evans@nasa.gov; steven.d.young@nasa.gov; taumi.daniels@nasa.gov;
   r.r.meyer@nasa.gov
NR 0
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7195
BN 978-1-4799-1536-1; 978-1-4799-1538-5
J9 IEEEAAIA DIGIT AVION
PY 2013
PG 28
WC Engineering, Aerospace
SC Engineering
GA BC1KH
UT WOS:000350222203020
ER

PT S
AU Glaab, P
AF Glaab, Patricia
GP IEEE
TI IMPROVED THROUGHPUT WITH COOPERATING FUTURISTIC AIRSPACE MANAGEMENT
   COMPONENTS
SO 2013 IEEE/AIAA 32ND DIGITAL AVIONICS SYSTEMS CONFERENCE (DASC)
SE IEEE-AIAA Digital Avionics Systems Conference
LA English
DT Proceedings Paper
CT IEEE/AIAA 32nd Digital Avionics Systems Conference (DASC)
CY OCT 05-10, 2013
CL New York, NY
SP IEEE, AIAA, BOEING, LRDC Systems LLC, SAAB, AVIONICS
AB An experiment was conducted to integrate airspace management tools that would typically be confined to either the en route or the terminal airspace to explore the potential benefits of their communication to improve arrival capacity. A NAS-wide simulation was configured with a new concept component that used the information to reconfigure the terminal airspace to the capacity benefit of the airport. Reconfiguration included a dynamically expanding and contracting TRACON area and a varying number of active arrival runways, both automatically selected to accommodate predicted volume of traffic. ATL and DFW were selected for the study.
   Results showed significant throughput increase for scenarios that are considered to be over-capacity for current day airport configurations. During periods of sustained demand for ATL 2018, throughput increased by 26 operations per hour (30%) and average delay was reduced from 18 minutes to 8 minutes per flight when using the dynamic TRACON. Similar results were obtained for DFW with 2018 traffic levels and for ATL with 2006 traffic levels, but with lower benefits due to lower demand.
C1 NASA, Langley Res Ctr, Hampton, VA 23665 USA.
RP Glaab, P (reprint author), NASA, Langley Res Ctr, Hampton, VA 23665 USA.
EM patricia.c.glaab@nasa.gov
NR 8
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7195
BN 978-1-4799-1536-1; 978-1-4799-1538-5
J9 IEEEAAIA DIGIT AVION
PY 2013
PG 16
WC Engineering, Aerospace
SC Engineering
GA BC1KH
UT WOS:000350222200005
ER

PT S
AU Glaab, T
AF Glaab, Trish
GP IEEE
TI IMPROVED THROUGHPUT WITH COOPERATING FUTURISTIC A IRSPA CE MANAGEMENT
   COMPONENTS
SO 2013 IEEE/AIAA 32ND DIGITAL AVIONICS SYSTEMS CONFERENCE (DASC)
SE IEEE-AIAA Digital Avionics Systems Conference
LA English
DT Proceedings Paper
CT IEEE/AIAA 32nd Digital Avionics Systems Conference (DASC)
CY OCT 05-10, 2013
CL New York, NY
SP IEEE, AIAA, BOEING, LRDC Systems LLC, SAAB, AVIONICS
C1 NASA, Langley Res Ctr, Hampton, VA 23665 USA.
RP Glaab, T (reprint author), NASA, Langley Res Ctr, Hampton, VA 23665 USA.
EM patricia.c.glaab@nasa.gov
NR 0
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7195
BN 978-1-4799-1536-1; 978-1-4799-1538-5
J9 IEEEAAIA DIGIT AVION
PY 2013
PG 21
WC Engineering, Aerospace
SC Engineering
GA BC1KH
UT WOS:000350222202044
ER

PT S
AU Gomez, AN
   Martin, L
   Homola, J
   Morey, S
   Cabrall, C
   Mercer, J
   Prevot, T
AF Gomez, Ashley N.
   Martin, Lynne
   Homola, Jeffrey
   Morey, Susan
   Cabrall, Christopher
   Mercer, Joey
   Prevot, Thomas
GP IEEE
TI INVESTIGATING THE COMPLEXITY OF TRANSITIONING SEPARATION ASSURANCE TOOLS
   INTO NEXTGEN AIR TRAFFIC CONTROL
SO 2013 IEEE/AIAA 32ND DIGITAL AVIONICS SYSTEMS CONFERENCE (DASC)
SE IEEE-AIAA Digital Avionics Systems Conference
LA English
DT Proceedings Paper
CT IEEE/AIAA 32nd Digital Avionics Systems Conference (DASC)
CY OCT 05-10, 2013
CL New York, NY
SP IEEE, AIAA, BOEING, LRDC Systems LLC, SAAB, AVIONICS
ID AUTOMATION
AB In a study, that introduced ground-based separation assurance automation through a series of envisioned transitional phases of concept maturity, it was found that subjective responses to scales of workload, situation awareness, and acceptability in a post run questionnaire revealed as-predicted results for three of the four study conditions but not for the third, Moderate condition. The trend continued for losses of separation (LOS) where the number of LOS events were far greater than expected in the Moderate condition. To offer an account of why the Moderate condition was perceived to be more difficult to manage than predicted, researchers examined the increase in amount and complexity of traffic, increase in communication load, and increased complexities as a result of the simulation's mix of aircraft equipage. Further analysis compared the tools presented through the phases, finding that controllers took advantage of the informational properties of the tools presented but shied away from using their decision support capabilities. Taking into account similar findings from other studies, it is suggested that the Moderate condition represented the first step into a "shared control" environment, which requires the controller to use the automation as a decision making partner rather than just a provider of information. Viewed in this light, the combination of tools offered in the Moderate condition was reviewed and some tradeoffs that may offset the identified complexities were suggested.
C1 [Gomez, Ashley N.; Martin, Lynne; Homola, Jeffrey; Morey, Susan; Cabrall, Christopher; Mercer, Joey] San Jose State Univ, NASA, Ames Res Ctr, Moffett Field, CA 94034 USA.
   [Prevot, Thomas] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
RP Gomez, AN (reprint author), San Jose State Univ, NASA, Ames Res Ctr, Moffett Field, CA 94034 USA.
NR 17
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7195
BN 978-1-4799-1536-1; 978-1-4799-1538-5
J9 IEEEAAIA DIGIT AVION
PY 2013
PG 15
WC Engineering, Aerospace
SC Engineering
GA BC1KH
UT WOS:000350222200028
ER

PT S
AU Jung, J
   Swenson, HN
   Thipphavong, J
   Chen, L
   Martin, L
   Nguyen, J
AF Jung, Jaewoo
   Swenson, Harry N.
   Thipphavong, Jane
   Chen, Liang
   Martin, Lynne
   Jimmy Nguyen
GP IEEE
TI EVALUATION OF THE TERMINAL AREA PRECISION SCHEDULING AND SPACING SYSTEM
   FOR PERFORMANCE-BASED NAVIGATION ARRIVALS
SO 2013 IEEE/AIAA 32ND DIGITAL AVIONICS SYSTEMS CONFERENCE (DASC)
SE IEEE-AIAA Digital Avionics Systems Conference
LA English
DT Proceedings Paper
CT IEEE/AIAA 32nd Digital Avionics Systems Conference (DASC)
CY OCT 05-10, 2013
CL New York, NY
SP IEEE, AIAA, BOEING, LRDC Systems LLC, SAAB, AVIONICS
C1 [Jung, Jaewoo; Swenson, Harry N.; Thipphavong, Jane] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
   [Chen, Liang] Univ Calif Santa Cruz, Santa Cruz, CA 95064 USA.
   [Martin, Lynne] San Jose State Univ, San Jose, CA 95192 USA.
   [Jimmy Nguyen] Optimal Synth Inc, Los Altos, CA USA.
RP Jung, J (reprint author), NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
EM jaewoo.jung@nasa.gov
NR 0
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7195
BN 978-1-4799-1536-1; 978-1-4799-1538-5
J9 IEEEAAIA DIGIT AVION
PY 2013
PG 23
WC Engineering, Aerospace
SC Engineering
GA BC1KH
UT WOS:000350222202040
ER

PT S
AU Jung, J
   Swenson, HN
   Thipphavong, J
   Martin, L
   Chen, L
   Nguyen, J
AF Jung, Jaewoo
   Swenson, Harry N.
   Thipphavong, Jane
   Martin, Lynne
   Chen, Liang
   Nguyen, Jimmy
GP IEEE
TI EVALUATION OF THE TERMINAL AREA PRECISION SCHEDULING AND SPACING SYSTEM
   FOR PERFORMANCE-BASED NAVIGATION ARRIVALS
SO 2013 IEEE/AIAA 32ND DIGITAL AVIONICS SYSTEMS CONFERENCE (DASC)
SE IEEE-AIAA Digital Avionics Systems Conference
LA English
DT Proceedings Paper
CT IEEE/AIAA 32nd Digital Avionics Systems Conference (DASC)
CY OCT 05-10, 2013
CL New York, NY
SP IEEE, AIAA, BOEING, LRDC Systems LLC, SAAB, AVIONICS
AB In 2012, NASA and FAA jointly conducted a human-in-the-loop air traffic simulation to evaluate the utility of the Terminal Area Precision Scheduling and Spacing (TAPSS) system for supporting Performance-Based Navigation arrival operations during periods of congestion at a mid-sized airport. The TAPSS system is a trajectory-based strategic planning and tactical control tool that was developed to efficiently manage arrivals. For this study, the TAPSS system was enhanced to handle Required Navigation Performance arrivals. A baseline case, where none of the TAPSS system's advisories were provided, was run along with two different configurations of the TAPSS system with differing sets of controller advisory tools. The engineering data indicate that the TAPSS system has a potential to enable efficient Performance-Based Navigation arrival operations. The participating controllers found the TAPSS system's advisories useful. When controllers were given the full set of TAPSS advisory tools, 90% of Required Navigation Performance arrivals stayed on-path as compared to 87% in the baseline case, the average extra track distance of Area Navigation arrivals decreased by 36%, and the average number of controller voice communications decreased by 13%.
C1 [Jung, Jaewoo; Swenson, Harry N.; Thipphavong, Jane] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
   [Martin, Lynne] San Jose State Univ, San Jose, CA USA.
   [Chen, Liang] Univ Calif Santa Cruz, Santa Cruz, CA USA.
   [Nguyen, Jimmy] Optimal Synth Inc, Los Altos, CA USA.
RP Jung, J (reprint author), NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
NR 28
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7195
BN 978-1-4799-1536-1; 978-1-4799-1538-5
J9 IEEEAAIA DIGIT AVION
PY 2013
PG 15
WC Engineering, Aerospace
SC Engineering
GA BC1KH
UT WOS:000350222200001
ER

PT S
AU Kerczewski, RI
   Wilson, JD
   Bishop, WD
AF Kerczewski, Robert I.
   Wilson, Jeffrey D.
   Bishop, William D.
GP IEEE
TI FREQUENCY SPECTRUM FOR INTEGRATION OF UNMANNED AIRCRAFT
SO 2013 IEEE/AIAA 32ND DIGITAL AVIONICS SYSTEMS CONFERENCE (DASC)
SE IEEE-AIAA Digital Avionics Systems Conference
LA English
DT Proceedings Paper
CT IEEE/AIAA 32nd Digital Avionics Systems Conference (DASC)
CY OCT 05-10, 2013
CL New York, NY
SP IEEE, AIAA, BOEING, LRDC Systems LLC, SAAB, AVIONICS
AB The goal of enabling the integration of unmanned aircraft systems (UAS) into the National Airspace System (NAS) in terms of UAS achieving routine access to the NAS has been established as a national goal in the United States. Among a number of technical barriers that must be overcome to meet this goal is the absence of standard, certifiable communications links supplying the control and non-payload communications (CNPC) function, essentially providing the link over which a pilot on the ground can control the unmanned aircraft (UA). The International Civil Aviation Organization (ICAO) has determined that the CNPC link must operate over protected aviation spectrum. Therefore protected aviation spectrum must be allocated for this function, approved through the processes of the International Telecommunications Union Radiocommunication Sector (ITU-R).
   Work has progressed in the definition of spectrum requirements for CNPC, and a portion of these requirements has been satisfied through new allocations approved at the ITU-R 2012 World Radiocommunication Conference (WRC-12). Additional work is ongoing or planned to satisfy the remaining spectrum requirements and define the specifications for the usage of CNPC spectrum allocations and develop supporting standards.
   This paper provides an overview of the status of RF spectrum for UAS CNPC. Issues that have been identified and ongoing analysis and research that will be necessary to fulfill spectrum requirements for UAS CNPC will be discussed. The results of this work will provide for the safe integration of UA into the NAS in both the LOS (Line of Sight) and BLOS (Beyond Line of Sight) realms.
C1 [Kerczewski, Robert I.; Wilson, Jeffrey D.] NASA, Glenn Res Ctr, Cleveland, OH 44135 USA.
   [Bishop, William D.] Verizon, Cleveland, OH USA.
RP Kerczewski, RI (reprint author), NASA, Glenn Res Ctr, Cleveland, OH 44135 USA.
NR 8
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7195
BN 978-1-4799-1536-1; 978-1-4799-1538-5
J9 IEEEAAIA DIGIT AVION
PY 2013
PG 9
WC Engineering, Aerospace
SC Engineering
GA BC1KH
UT WOS:000350222202011
ER

PT S
AU Kerczewski, RJ
AF Kerczewski, Robert J.
GP IEEE
TI Frequency Spectrum for Integration of Unmanned Aircraft
SO 2013 IEEE/AIAA 32ND DIGITAL AVIONICS SYSTEMS CONFERENCE (DASC)
SE IEEE-AIAA Digital Avionics Systems Conference
LA English
DT Proceedings Paper
CT IEEE/AIAA 32nd Digital Avionics Systems Conference (DASC)
CY OCT 05-10, 2013
CL New York, NY
SP IEEE, AIAA, BOEING, LRDC Systems LLC, SAAB, AVIONICS
C1 NASA, Glenn Res Ctr, Cleveland, OH 44135 USA.
RP Kerczewski, RJ (reprint author), NASA, Glenn Res Ctr, Cleveland, OH 44135 USA.
EM rkerczewski@nasa.gov
NR 0
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7195
BN 978-1-4799-1536-1; 978-1-4799-1538-5
J9 IEEEAAIA DIGIT AVION
PY 2013
PG 20
WC Engineering, Aerospace
SC Engineering
GA BC1KH
UT WOS:000350222207003
ER

PT S
AU Koczo, S
   Wing, D
AF Koczo, Stefan
   Wing, David
GP IEEE
TI AN OPERATIONAL SAFETY AND CERTIFICATION ASSESSMENT OF A TASAR EFB
   APPLICATION
SO 2013 IEEE/AIAA 32ND DIGITAL AVIONICS SYSTEMS CONFERENCE (DASC)
SE IEEE-AIAA Digital Avionics Systems Conference
LA English
DT Proceedings Paper
CT IEEE/AIAA 32nd Digital Avionics Systems Conference (DASC)
CY OCT 05-10, 2013
CL New York, NY
SP IEEE, AIAA, BOEING, LRDC Systems LLC, SAAB, AVIONICS
AB This paper presents an overview of a Traffic Aware Strategic Aircrew Requests (TASAR) Electronic Flight Bag application intended to inform the pilot of trajectory improvement opportunities while en route that result in operational benefits. The results of safety analyses and a detailed review of Federal Aviation Administration (FAA) regulatory documents that establish certification and operational approval requirements are presented for TASAR.
   The safety analyses indicate that TASAR has a likely Failure Effects Classification of "No Effect," and at most, is no worse than "Minor Effect." Based on this safety assessment and the detailed review of FAA regulatory documents that determine certification and operational approval requirements, this study concludes that TASAR can be implemented in the flight deck as a Type B software application hosted on a Class 2 Portable Electronic Device (PED) Electronic Flight Bag (EFB). This implementation approach would provide a relatively low-cost path to certification and operational approval for both retrofit and forward fit implementation, while at the same time facilitating the business case for early ADS-B IN equipage. A preliminary review by FAA certification and operational approvers of the analyses presented here confirmed that the conclusions are appropriate and that TASAR will be considered a Type B application.
C1 [Koczo, Stefan] Rockwell Collins, Cedar Rapids, IA 52498 USA.
   [Wing, David] NASA, Langley Res Ctr, Hampton, VA 23665 USA.
RP Koczo, S (reprint author), Rockwell Collins, Cedar Rapids, IA 52498 USA.
NR 17
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7195
BN 978-1-4799-1536-1; 978-1-4799-1538-5
J9 IEEEAAIA DIGIT AVION
PY 2013
PG 18
WC Engineering, Aerospace
SC Engineering
GA BC1KH
UT WOS:000350222200029
ER

PT S
AU Koczo, S
   Wing, D
AF Koczo, Steve
   Wing, David
GP IEEE
TI An Operational Safety and Certification Assessment of a TASAR EFB
   Application
SO 2013 IEEE/AIAA 32ND DIGITAL AVIONICS SYSTEMS CONFERENCE (DASC)
SE IEEE-AIAA Digital Avionics Systems Conference
LA English
DT Proceedings Paper
CT IEEE/AIAA 32nd Digital Avionics Systems Conference (DASC)
CY OCT 05-10, 2013
CL New York, NY
SP IEEE, AIAA, BOEING, LRDC Systems LLC, SAAB, AVIONICS
C1 [Koczo, Steve] Rockwell Collins Adv Technol Ctr, Cedar Rapids, IA 52498 USA.
   [Wing, David] NASA, Langley Res Ctr, Hampton, VA USA.
RP Koczo, S (reprint author), Rockwell Collins Adv Technol Ctr, Cedar Rapids, IA 52498 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7195
BN 978-1-4799-1536-1; 978-1-4799-1538-5
J9 IEEEAAIA DIGIT AVION
PY 2013
PG 23
WC Engineering, Aerospace
SC Engineering
GA BC1KH
UT WOS:000350222203019
ER

PT S
AU Kulkarni, D
   Wang, Y
   Sridhar, B
AF Kulkarni, Deepak
   Wang, Yao
   Sridhar, Banavar
GP IEEE
TI DATA MINING FOR UNDERSTANDING AND IMPROVING DECISION-MAKING AFFECTING
   GROUND DELAY PROGRAMS
SO 2013 IEEE/AIAA 32ND DIGITAL AVIONICS SYSTEMS CONFERENCE (DASC)
SE IEEE-AIAA Digital Avionics Systems Conference
LA English
DT Proceedings Paper
CT IEEE/AIAA 32nd Digital Avionics Systems Conference (DASC)
CY OCT 05-10, 2013
CL New York, NY
SP IEEE, AIAA, BOEING, LRDC Systems LLC, SAAB, AVIONICS
AB Difficulty of deciding on control action depends on the weather and traffic conditions. Weather signature on different days can categorize days into days with little decision difficulty, days with moderate decision difficulty and days with high decision difficulty. This paper examines performance of different data mining methods in the three regions of decision difficulty. Not surprisingly, data mining methods have the best performance in the region of little decision difficulty and have the poorest performance in the region of most decision difficulty. In applications where data mining methods have differing performance in differing regions, it would be more useful to characterize the region specific performance instead of characterizing performance by a single parameter.
C1 [Kulkarni, Deepak; Wang, Yao; Sridhar, Banavar] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
RP Kulkarni, D (reprint author), NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
NR 4
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7195
BN 978-1-4799-1536-1; 978-1-4799-1538-5
J9 IEEEAAIA DIGIT AVION
PY 2013
PG 8
WC Engineering, Aerospace
SC Engineering
GA BC1KH
UT WOS:000350222201043
ER

PT S
AU Latorella, K
   Perry, RB
   Shay, R
   Merritt, W
   Cameron, R
AF Latorella, Kara
   Perry, Raleigh B.
   Shay, Richard
   Merritt, Williom
   Cameron, Robert
GP IEEE
TI PREFERENCE AND OPERATIONAL ACCEPTABILITY OF FLIGHTDECK INTERVAL
   MANAGEMENT AVIONICS
SO 2013 IEEE/AIAA 32ND DIGITAL AVIONICS SYSTEMS CONFERENCE (DASC)
SE IEEE-AIAA Digital Avionics Systems Conference
LA English
DT Proceedings Paper
CT IEEE/AIAA 32nd Digital Avionics Systems Conference (DASC)
CY OCT 05-10, 2013
CL New York, NY
SP IEEE, AIAA, BOEING, LRDC Systems LLC, SAAB, AVIONICS
C1 [Latorella, Kara; Perry, Raleigh B.] NASA, Langley Res Ctr, Hampton, VA 23665 USA.
   [Shay, Richard] Natl Inst Aviat, Hampton, VA USA.
   [Merritt, Williom; Cameron, Robert] Northrup Grumman Tech Serv, Hampton, VA USA.
RP Latorella, K (reprint author), NASA, Langley Res Ctr, Hampton, VA 23665 USA.
EM K.A.Latorella@nasa.gov
NR 0
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7195
BN 978-1-4799-1536-1; 978-1-4799-1538-5
J9 IEEEAAIA DIGIT AVION
PY 2013
PG 27
WC Engineering, Aerospace
SC Engineering
GA BC1KH
UT WOS:000350222203021
ER

PT S
AU Latorella, K
   Perry, RB
   Shay, R
   Merritt, W
   Cameron, R
AF Latorella, Kara
   Perry, Raleigh B.
   Shay, Richard
   Merritt, William
   Cameron, Robert
GP IEEE
TI PREFERENCE AND OPERATIONAL ACCEPTABILITY OF FLIGHTDECK INTERVAL
   MANAGEMENT AVIONICS
SO 2013 IEEE/AIAA 32ND DIGITAL AVIONICS SYSTEMS CONFERENCE (DASC)
SE IEEE-AIAA Digital Avionics Systems Conference
LA English
DT Proceedings Paper
CT IEEE/AIAA 32nd Digital Avionics Systems Conference (DASC)
CY OCT 05-10, 2013
CL New York, NY
SP IEEE, AIAA, BOEING, LRDC Systems LLC, SAAB, AVIONICS
AB This study investigated the relative acceptance of different avionics implementations that present Flightdeck Interval Management (FIM) speeds and speed deviations to commercial pilots, and for indications of conditions that require action. Results indicate a clear preference for an Avionics condition where target speed information was provided in the primary flight display, relevant traffic information was provided in the navigational display, IM clearance information and conformance information was provided in the Multi-function Control Display Unit (MCDU), and the engine-indicating and crew-alerting system (EICAS) display showed conformance deviation alerts; and a condition in which all this information was presented only in an Electronic Flight Bag (EFB)-like display (with extended functionality) implemented under the side window for both pilots. Other Avionics conditions tested were less desirable. These were conditions in which the EFB was mounted aft of, and below the side window - with and without an auxiliary display that repeated speed target and conformance information in the primary field of view. Results also indicate a preference for aural indications to direct attention to new speed targets, as a reminder to enter these when not done in a timely manner, and to convey when the aircraft has deviated significantly from the calculated FIM speed profile. The aural indications, thresholds for reminders and conformance indications used in this study were found to be appropriate. In general FIM, as implemented in this study, was perceived as having no deleterious effect on workload or crew coordination; and, under some conditions, was reported to have improved situation awareness of arrival speeds and general conditions during approach and descent.
C1 [Latorella, Kara; Perry, Raleigh B.] NASA, Langley Res Ctr, Hampton, VA 23665 USA.
   [Shay, Richard] Natl Inst Aviat, Hampton, VA USA.
   [Merritt, William; Cameron, Robert] Northrup Grumman Tech Serv, Hampton, VA USA.
RP Latorella, K (reprint author), NASA, Langley Res Ctr, Hampton, VA 23665 USA.
EM K.A.Latorella@nasa.gov
NR 5
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7195
BN 978-1-4799-1536-1; 978-1-4799-1538-5
J9 IEEEAAIA DIGIT AVION
PY 2013
PG 10
WC Engineering, Aerospace
SC Engineering
GA BC1KH
UT WOS:000350222200031
ER

PT S
AU Martin, L
   Gomez, A
   Homola, J
   Morey, S
   Cabrall, C
   Mercer, J
   Prevoit, T
AF Martin, Lynne
   Gomez, Ashley
   Homola, Jeffrey
   Morey, Susan
   Cabrall, Christopher
   Mercer, Joey
   Prevoit, Thomas
GP IEEE
TI Investigating the complexity of transitioning separation assurance tools
   into NextGen Air Traffic Control
SO 2013 IEEE/AIAA 32ND DIGITAL AVIONICS SYSTEMS CONFERENCE (DASC)
SE IEEE-AIAA Digital Avionics Systems Conference
LA English
DT Proceedings Paper
CT IEEE/AIAA 32nd Digital Avionics Systems Conference (DASC)
CY OCT 05-10, 2013
CL New York, NY
SP IEEE, AIAA, BOEING, LRDC Systems LLC, SAAB, AVIONICS
C1 [Martin, Lynne; Gomez, Ashley; Homola, Jeffrey; Morey, Susan; Cabrall, Christopher; Mercer, Joey] San Jose State Univ, Res Fdn, NASA, Ames Res Ctr, San Jose, CA 95192 USA.
   [Prevoit, Thomas] NASA, Ames Res Ctr, Mountain View, CA USA.
RP Martin, L (reprint author), San Jose State Univ, Res Fdn, NASA, Ames Res Ctr, San Jose, CA 95192 USA.
EM lynne.martin@nasa.gov
NR 0
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7195
BN 978-1-4799-1536-1; 978-1-4799-1538-5
J9 IEEEAAIA DIGIT AVION
PY 2013
PG 19
WC Engineering, Aerospace
SC Engineering
GA BC1KH
UT WOS:000350222203017
ER

PT S
AU Martin, L
   Gomez, A
   Homola, J
   Morey, S
   Cabrall, C
   Mercer, J
   Prevot, T
AF Martin, Lynne
   Gomez, Ashley
   Homola, Jeffrey
   Morey, Susan
   Cabrall, Christopher
   Mercer, Joey
   Prevot, Thomas
GP IEEE
TI Investigating the complexity of transitioning separation assurance tools
   into NextGen Air Traffic Control
SO 2013 IEEE/AIAA 32ND DIGITAL AVIONICS SYSTEMS CONFERENCE (DASC)
SE IEEE-AIAA Digital Avionics Systems Conference
LA English
DT Proceedings Paper
CT IEEE/AIAA 32nd Digital Avionics Systems Conference (DASC)
CY OCT 05-10, 2013
CL New York, NY
SP IEEE, AIAA, BOEING, LRDC Systems LLC, SAAB, AVIONICS
C1 [Martin, Lynne; Gomez, Ashley; Homola, Jeffrey; Morey, Susan; Cabrall, Christopher; Mercer, Joey] San Jose State Univ, Res Fdn, NASA, Ames Res Ctr, San Jose, CA 95192 USA.
   [Prevot, Thomas] NASA, Ames Res Ctr, Mountain View, CA USA.
RP Martin, L (reprint author), San Jose State Univ, Res Fdn, NASA, Ames Res Ctr, San Jose, CA 95192 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7195
BN 978-1-4799-1536-1; 978-1-4799-1538-5
J9 IEEEAAIA DIGIT AVION
PY 2013
PG 4
WC Engineering, Aerospace
SC Engineering
GA BC1KH
UT WOS:000350222203018
ER

PT S
AU Montoya, JV
   Barmore, DB
AF Montoya, Justin V.
   Barmore, David B.
GP IEEE
TI A MARKET APPROACH TO REAL-TIME DEPARTURE RUNWAY SCHEDULING
SO 2013 IEEE/AIAA 32ND DIGITAL AVIONICS SYSTEMS CONFERENCE (DASC)
SE IEEE-AIAA Digital Avionics Systems Conference
LA English
DT Proceedings Paper
CT IEEE/AIAA 32nd Digital Avionics Systems Conference (DASC)
CY OCT 05-10, 2013
CL New York, NY
SP IEEE, AIAA, BOEING, LRDC Systems LLC, SAAB, AVIONICS
AB Departure runway usage is a major source of delay in the US National Airspace System. Additionally, the current first-come-first-served paradigm for allocating departure runway usage produces strong incentives to airlines to spend all this delay time on the taxiway, even though this can result in wasted fuel. In this paper, a novel dynamic second-price auction method for allocating runway usage is developed. Analytical and simulated results are obtained that suggest the proposed method does not increase total delay, and that almost all delay is spent at the gate (thereby saving fuel). Thousands of simulations of a realistic scenario at John F. Kennedy International Airport indicate that this new mechanism offers two benefits over the current first-come-first-served mechanism. The first benefit suggests this mechanism can reduce airline costs (beyond the savings on fuel). The second benefit suggests the auction mechanism can generate more equitable spread of delay across airlines by an appropriate parametrization over budget constraints.
C1 [Montoya, Justin V.] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
   [Barmore, David B.] Stanford Univ, Dept Polit Sci, Stanford, CA 94305 USA.
RP Montoya, JV (reprint author), NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
EM justin.v.montoya@nasa.gov; barmore@stanford.edu
NR 18
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7195
BN 978-1-4799-1536-1; 978-1-4799-1538-5
J9 IEEEAAIA DIGIT AVION
PY 2013
PG 16
WC Engineering, Aerospace
SC Engineering
GA BC1KH
UT WOS:000350222201044
ER

PT S
AU Ponchak, DS
   Apaza, RD
   Haynes, B
   Wichgers, JM
   Roy, A
AF Ponchak, Denise S.
   Apaza, Rafael D.
   Haynes, Brian
   Wichgers, Joel M.
   Roy, Aloke
GP IEEE
TI A STUDY OF FUTURE COMMUNICATIONS CONCEPTS AND TECHNOLOGIES FOR THE
   NATIONAL AIRSPACE SYSTEM-PART I
SO 2013 IEEE/AIAA 32ND DIGITAL AVIONICS SYSTEMS CONFERENCE (DASC)
SE IEEE-AIAA Digital Avionics Systems Conference
LA English
DT Proceedings Paper
CT IEEE/AIAA 32nd Digital Avionics Systems Conference (DASC)
CY OCT 05-10, 2013
CL New York, NY
SP IEEE, AIAA, BOEING, LRDC Systems LLC, SAAB, AVIONICS
AB The National Aviation and Space Administration (NASA) Glenn Research Center (GRC) is investigating current and anticipated wireless communications concepts and technologies that the National Airspace System (NAS) may need in the next 50 years. NASA has awarded three NASA Research Anouncements (NAR) studies with the objective to determine the most promising candidate technologies for air-to-air and air-to-ground data exchange and analyze their suitability in a post-NextGen NAS environment. This paper will present progress made in the studies and describe the communications challenges and opportunities that have been identified during the studies' first phase.
C1 [Ponchak, Denise S.; Apaza, Rafael D.] NASA Glenn Res Ctr, Cleveland, OH 44135 USA.
   [Haynes, Brian] Xcelar, Hopkins, MN USA.
   [Wichgers, Joel M.] Rockwell Collins, Cedar Rapids, IA USA.
   [Roy, Aloke] Honeywell Int Inc, Columbia, MD USA.
RP Ponchak, DS (reprint author), NASA Glenn Res Ctr, Cleveland, OH 44135 USA.
EM Denise.S.Ponchak@nasa.gov; Rafael.D.Apaza@nasa.gov;
   brian.haynes@xcelar.com; jmwichge@rockwellcollins.com;
   aloke.roy@honeywell.com
NR 0
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7195
BN 978-1-4799-1536-1; 978-1-4799-1538-5
J9 IEEEAAIA DIGIT AVION
PY 2013
PG 10
WC Engineering, Aerospace
SC Engineering
GA BC1KH
UT WOS:000350222201006
ER

PT S
AU Roy, A
   Haynes, B
   Wichgers, JM
   Ponchak, D
   Apaza, R
AF Roy, Aloke
   Haynes, Brian
   Wichgers, Joel M.
   Ponchak, Denise
   Apaza, Rafael
GP IEEE
TI A Study of Future Communications Concepts and Technologies for the
   National Airspace System (The First Six Months)
SO 2013 IEEE/AIAA 32ND DIGITAL AVIONICS SYSTEMS CONFERENCE (DASC)
SE IEEE-AIAA Digital Avionics Systems Conference
LA English
DT Proceedings Paper
CT IEEE/AIAA 32nd Digital Avionics Systems Conference (DASC)
CY OCT 05-10, 2013
CL New York, NY
SP IEEE, AIAA, BOEING, LRDC Systems LLC, SAAB, AVIONICS
C1 [Roy, Aloke] Honeywell Int Inc, Morristown, NJ 07960 USA.
   [Haynes, Brian] Agile Def, London, England.
   [Wichgers, Joel M.] Rockwell Collins, Cedar Rapids, IA USA.
   [Ponchak, Denise; Apaza, Rafael] NASA, Glenn Res Ctr, Mountain View, CA USA.
RP Roy, A (reprint author), Honeywell Int Inc, Morristown, NJ 07960 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7195
BN 978-1-4799-1536-1; 978-1-4799-1538-5
J9 IEEEAAIA DIGIT AVION
PY 2013
PG 5
WC Engineering, Aerospace
SC Engineering
GA BC1KH
UT WOS:000350222204025
ER

PT S
AU Sheth, K
   Sridhar, B
   McNally, D
   Petersen, J
AF Sheth, Kapil
   Sridhar, Banavar
   McNally, Dave
   Petersen, Julien
GP IEEE
TI STRATEGIC AIRSPACE CONSTRAINT ANALYSIS AND ENVIRONMENTAL IMPACT OF
   DYNAMIC WEATHER ROUTES
SO 2013 IEEE/AIAA 32ND DIGITAL AVIONICS SYSTEMS CONFERENCE (DASC)
SE IEEE-AIAA Digital Avionics Systems Conference
LA English
DT Proceedings Paper
CT IEEE/AIAA 32nd Digital Avionics Systems Conference (DASC)
CY OCT 05-10, 2013
CL New York, NY
SP IEEE, AIAA, BOEING, LRDC Systems LLC, SAAB, AVIONICS
AB This paper presents analyses of the strategic airspace constraints and the environmental impact of Dynamic Weather Routes automation. The Dynamic Weather Routes are flight plans along which an aircraft can save a user-specified amount of wind-corrected flying time compared to the currently active flight plan. The strategic airspace constraints address sector congestion and Special Activity Area traversal along the two flight plans. The environmental impact considers fuel burn and emissions (e.g., hydrocarbons, carbon dioxide, etc.) along the two flight plans. A comparison of airspace constraints and emission values between the as-flown tracks of the aircraft and the suggested Dynamic Weather Route is presented. The results are for August 1 through October 31, 2012, when NASA's Dynamic Weather Routes software was running continuously at the American Airlines System Operations Center in F-t. Worth, TX. The results indicate that Dynamic Weather Routes not only save flying time and fuel, but help reduce traffic congestion and harmful emissions as well.
C1 [Sheth, Kapil; Sridhar, Banavar; McNally, Dave] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
   [Petersen, Julien] UC Santa Cruz, Moffett Field, CA USA.
RP Sheth, K (reprint author), NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
EM Kapil.Sheth@nasa.gov; Banavar.Sridhar@nasa.gov; Dave.McNally@nasa.gov;
   Julien.C.Petersen@nasa.gov
NR 11
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7195
BN 978-1-4799-1536-1; 978-1-4799-1538-5
J9 IEEEAAIA DIGIT AVION
PY 2013
PG 11
WC Engineering, Aerospace
SC Engineering
GA BC1KH
UT WOS:000350222200016
ER

PT S
AU Smith, N
AF Smith, Nancy
GP IEEE
TI NextGen Operations in a Simulated New York Area Airspace
SO 2013 IEEE/AIAA 32ND DIGITAL AVIONICS SYSTEMS CONFERENCE (DASC)
SE IEEE-AIAA Digital Avionics Systems Conference
LA English
DT Proceedings Paper
CT IEEE/AIAA 32nd Digital Avionics Systems Conference (DASC)
CY OCT 05-10, 2013
CL New York, NY
SP IEEE, AIAA, BOEING, LRDC Systems LLC, SAAB, AVIONICS
C1 NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
RP Smith, N (reprint author), NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7195
BN 978-1-4799-1536-1; 978-1-4799-1538-5
J9 IEEEAAIA DIGIT AVION
PY 2013
PG 35
WC Engineering, Aerospace
SC Engineering
GA BC1KH
UT WOS:000350222206011
ER

PT S
AU Smith, NM
   Parke, B
   Lee, P
   Homola, J
   Brasil, C
   Buckley, N
   Cabrall, C
   Chevalley, E
   Lin, C
   Morey, S
   Omar, F
   Rein-Weston, D
   Yoo, HS
AF Smith, Nancy M.
   Parke, Bonny
   Lee, Paul
   Homola, Jeff
   Brasil, Connie
   Buckley, Nathan
   Cabrall, Chris
   Chevalley, Eric
   Lin, Cindy
   Morey, Susan
   Omar, Faisal
   Rein-Weston, Daphne
   Yoo, Hyo-Sang
GP IEEE
TI NEXTGEN OPERATIONS IN A SIMULATED NY AREA AIRSPACE
SO 2013 IEEE/AIAA 32ND DIGITAL AVIONICS SYSTEMS CONFERENCE (DASC)
SE IEEE-AIAA Digital Avionics Systems Conference
LA English
DT Proceedings Paper
CT IEEE/AIAA 32nd Digital Avionics Systems Conference (DASC)
CY OCT 05-10, 2013
CL New York, NY
SP IEEE, AIAA, BOEING, LRDC Systems LLC, SAAB, AVIONICS
AB A human-in-the-loop simulation conducted in the Airspace Operations Laboratory (AOL) at NASA Ames Research Center explored the feasibility of a Next Generation Air Transportation System (NextGen) solution to address airspace and airport capacity limitations in and around the New York metropolitan area. A week-long study explored the feasibility of a new Optimal Profile Descent (OPD) arrival into the airspace as well as a novel application of a Terminal Area Precision Scheduling and Spacing (TAPSS) enhancement to the Traffic Management Advisor (TMA) arrival scheduling tool to coordinate high volume arrival traffic to intersecting runways. In the simulation, four en route sector controllers and four terminal radar approach control (TRACON) controllers managed traffic inbound to Newark International Airport's primary runway, 22L, and its intersecting overflow runway, 11. TAPSS was used to generate independent arrival schedules for each runway and a traffic management coordinator participant adjusted the arrival schedule for each runway 11 aircraft to follow one of the 22L aircraft. TAPSS also provided controller-managed spacing tools (slot markers with speed advisories and timelines) to assist the TRACON controllers in managing the arrivals that were descending on OPDs.
   Results showed that the tools significantly decreased the occurrence of runway violations (potential go-arounds) when compared with a Baseline condition with no tools. Further, the combined use of the tools with the new OPDs produced a peak arrival rate of over 65 aircraft per hour using instrument flight rules (IFR), exceeding the current maximum arrival rate at Newark Liberty International Airport (EWR) of 52 per hour under visual flight rules (VFR). Although the participants rated the workload as relatively low and acceptable both with and without the tools, they rated the tools as reducing their workload further. Safety and coordination were rated by most participants as acceptable in both conditions, although the TRACON Runway Coordinator (TRC) rated neither as acceptable in the Baseline condition. Regarding the role of the TRC, the two TRACON controllers handling the 11 arrivals indicated that the TRC was very much needed in the Baseline condition without tools, but not needed in the condition with tools. This indicates that the tools were providing much of the sequencing and spacing information that the TRC had supplied in the Baseline condition.
C1 [Smith, Nancy M.] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
   [Parke, Bonny; Lee, Paul; Homola, Jeff; Brasil, Connie; Buckley, Nathan; Cabrall, Chris; Chevalley, Eric; Lin, Cindy; Morey, Susan; Omar, Faisal; Rein-Weston, Daphne; Yoo, Hyo-Sang] San Jose State Univ Fdn, San Jose, CA USA.
RP Smith, NM (reprint author), NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
NR 10
TC 0
Z9 0
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7195
BN 978-1-4799-1536-1; 978-1-4799-1538-5
J9 IEEEAAIA DIGIT AVION
PY 2013
PG 15
WC Engineering, Aerospace
SC Engineering
GA BC1KH
UT WOS:000350222201052
ER

PT S
AU Thipphavong, J
   Jung, J
   Swenson, HN
   Martin, L
   Lin, MI
   Nguyen, J
AF Thipphavong, Jane
   Jung, Jaewoo
   Swenson, Harry N.
   Martin, Lynne
   Lin, Melody I.
   Jimmy Nguyen
GP IEEE
TI EVALUATION OF THE TERMINAL SEQUENCING AND SPACING SYSTEM FOR
   PERFORMANCE-BASED NAVIGATION ARRIVALS
SO 2013 IEEE/AIAA 32ND DIGITAL AVIONICS SYSTEMS CONFERENCE (DASC)
SE IEEE-AIAA Digital Avionics Systems Conference
LA English
DT Proceedings Paper
CT IEEE/AIAA 32nd Digital Avionics Systems Conference (DASC)
CY OCT 05-10, 2013
CL New York, NY
SP IEEE, AIAA, BOEING, LRDC Systems LLC, SAAB, AVIONICS
C1 [Thipphavong, Jane; Jung, Jaewoo; Swenson, Harry N.] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
   [Martin, Lynne] San Jose State Univ, San Jose, CA 95192 USA.
   [Lin, Melody I.; Jimmy Nguyen] Optimal Synth Inc, Los Altos, CA USA.
RP Thipphavong, J (reprint author), NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7195
BN 978-1-4799-1536-1; 978-1-4799-1538-5
J9 IEEEAAIA DIGIT AVION
PY 2013
PG 20
WC Engineering, Aerospace
SC Engineering
GA BC1KH
UT WOS:000350222202041
ER

PT S
AU Thipphavong, J
   Jung, J
   Swenson, H
   Martin, L
   Lin, M
   Nguyen, J
AF Thipphavong, Jane
   Jung, Jaewoo
   Swenson, Harry
   Martin, Lynne
   Lin, Melody
   Nguyen, Jimmy
GP IEEE
TI EVALUATION OF THE TERMINAL SEQUENCING AND SPACING SYSTEM FOR
   PERFORMANCE-BASED NAVIGATION ARRIVALS
SO 2013 IEEE/AIAA 32ND DIGITAL AVIONICS SYSTEMS CONFERENCE (DASC)
SE IEEE-AIAA Digital Avionics Systems Conference
LA English
DT Proceedings Paper
CT IEEE/AIAA 32nd Digital Avionics Systems Conference (DASC)
CY OCT 05-10, 2013
CL New York, NY
SP IEEE, AIAA, BOEING, LRDC Systems LLC, SAAB, AVIONICS
AB NASA has developed the Terminal Sequencing and Spacing (TSS) system, a suite of advanced arrival management technologies combining time-based scheduling and controller precision spacing tools. TSS is a ground-based controller automation tool that facilitates sequencing and merging arrivals that have both current standard ATC routes and terminal Performance-Based Navigation (PBN) routes, especially during highly congested demand periods. In collaboration with the FAA and MITRE's Center for Advanced Aviation System Development (CAASD), TSS system performance was evaluated in human-in-the-loop (HITL) simulations with currently active controllers as participants. Traffic scenarios had mixed Area Navigation (RNAV) and Required Navigation Performance (RNP) equipage, where the more advanced RNP-equipped aircraft had preferential treatment with a shorter approach option. Simulation results indicate the TSS system achieved benefits by enabling PBN, while maintaining high throughput rates-10% above baseline demand levels. Flight path predictability improved, where path deviation was reduced by 2 NM on average and variance in the downwind leg length was 75% less. Arrivals flew more fuel-efficient descents for longer, spending an average of 39 seconds less in step-down level altitude segments. Self-reported controller workload was reduced, with statistically significant differences at the p<0.01 level. The RNP-equipped arrivals were also able to more frequently capitalize on the benefits of being "Best-Equipped, Best-Served" (BEBS), where less vectoring was needed and nearly all RNP approaches were conducted without interruption.
C1 [Thipphavong, Jane; Jung, Jaewoo; Swenson, Harry] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
   [Martin, Lynne] San Jose State Univ, San Jose, CA USA.
   [Lin, Melody; Nguyen, Jimmy] Optimal Synth, Los Altos, CA USA.
RP Thipphavong, J (reprint author), NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
NR 23
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7195
BN 978-1-4799-1536-1; 978-1-4799-1538-5
J9 IEEEAAIA DIGIT AVION
PY 2013
PG 15
WC Engineering, Aerospace
SC Engineering
GA BC1KH
UT WOS:000350222200002
ER

PT S
AU Vaddi, S
   Lu, HL
   Hayashi, M
AF Vaddi, Sai
   Lu, Hui-Ling
   Hayashi, Miwa
GP IEEE
TI COMPUTER VISION BASED SURVEILLANCE CONCEPT FOR AIRPORT RAMP OPERATIONS
SO 2013 IEEE/AIAA 32ND DIGITAL AVIONICS SYSTEMS CONFERENCE (DASC)
SE IEEE-AIAA Digital Avionics Systems Conference
LA English
DT Proceedings Paper
CT IEEE/AIAA 32nd Digital Avionics Systems Conference (DASC)
CY OCT 05-10, 2013
CL New York, NY
SP IEEE, AIAA, BOEING, LRDC Systems LLC, SAAB, AVIONICS
AB Current research develops a vision-based surveillance system concept suitable for airport ramp area operations. The surveillance approach consists of computer vision algorithms operating on video streams from surveillance cameras for detecting aircraft in images and localizing them. Rough order of magnitude estimates of the number of cameras required to cover the ramp area at a sample airport (Dallas/Fort Worth International Airport) were obtained. Two sets of algorithms with complimentary features were developed to detect an aircraft in a given image. The first set of algorithms was based on background subtraction, a popular computer-vision approach, for change detection in video streams. The second set was a supervised-learning approach based on a model learned from a database of images. The Histogram of Oriented Gradient (HOG) feature was used for classification with Support Vector Machines (SVMs). Then, an algorithm for matching aircraft in two different images was developed based on an approximate aircraft localization algorithm. Finally, stereo-vision algorithms were used for 3D-localization of the aircraft. A 1: 400 scale model of a realistic airport consisting of a terminal building, jet bridges, ground marking, aircraft, and ground vehicles was used for testing the various algorithms. Aircraft detection was demonstrated using static and moving aircraft images, single and multiple aircraft images, and occluded aircraft images. Preliminary testing using the in-house setup demonstrated 3D localization accuracy of up to 30 ft.
C1 [Vaddi, Sai; Lu, Hui-Ling] Optimal Synth Inc, Los Altos, CA 94022 USA.
   [Hayashi, Miwa] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
RP Vaddi, S (reprint author), Optimal Synth Inc, Los Altos, CA 94022 USA.
EM vaddi@optisyn.com; vicky@optisyn.com; miwa.hayashi@nasa.gov
NR 9
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7195
BN 978-1-4799-1536-1; 978-1-4799-1538-5
J9 IEEEAAIA DIGIT AVION
PY 2013
PG 13
WC Engineering, Aerospace
SC Engineering
GA BC1KH
UT WOS:000350222201013
ER

PT S
AU Vu, KPL
   Morales, G
   Chlappe, D
   Strybel, TZ
   Battiste, V
   Shively, J
   Buker, T
AF Vu, Kim-Phuong L.
   Morales, Greg
   Chlappe, Dan
   Strybel, Thomas Z.
   Battiste, Vernol
   Shively, Jay
   Buker, Tim
GP IEEE
TI INFLUENCE OF UAS PILOT COMMUNICATION AND EXECUTION DELAY ON CONTROLLER'S
   ACCEPTABILITY RATINGS OF UAS-ATC INTERACTIONS
SO 2013 IEEE/AIAA 32ND DIGITAL AVIONICS SYSTEMS CONFERENCE (DASC)
SE IEEE-AIAA Digital Avionics Systems Conference
LA English
DT Proceedings Paper
CT IEEE/AIAA 32nd Digital Avionics Systems Conference (DASC)
CY OCT 05-10, 2013
CL New York, NY
SP IEEE, AIAA, BOEING, LRDC Systems LLC, SAAB, AVIONICS
C1 [Vu, Kim-Phuong L.; Morales, Greg; Chlappe, Dan; Strybel, Thomas Z.] Ctr Human Factors Adv Aeronaut Technol, Long Beach, CA 90801 USA.
   [Vu, Kim-Phuong L.; Morales, Greg; Chlappe, Dan; Strybel, Thomas Z.] Calif State Univ Long Beach, Long Beach, CA 90840 USA.
   [Battiste, Vernol; Shively, Jay] NASA, Ames Res Ctr, Mountain View, CA USA.
   [Buker, Tim] SAIC, Tysons Corner, VA USA.
RP Vu, KPL (reprint author), Ctr Human Factors Adv Aeronaut Technol, Long Beach, CA 90801 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7195
BN 978-1-4799-1536-1; 978-1-4799-1538-5
J9 IEEEAAIA DIGIT AVION
PY 2013
PG 33
WC Engineering, Aerospace
SC Engineering
GA BC1KH
UT WOS:000350222207002
ER

PT S
AU Vu, KPL
   Morales, G
   Chiappe, D
   Strybel, TZ
   Battiste, V
   Shively, J
   Buker, TJ
AF Vu, Kim-Phuong L.
   Morales, Gregory
   Chiappe, Dan
   Strybel, Thomas Z.
   Battiste, Vernol
   Shively, Jay
   Buker, Timothy J.
GP IEEE
TI INFLUENCE OF UAS PILOT COMMUNICATION AND EXECUTION DELAY ON CONTROLLER'S
   ACCEPTABILITY RATINGS OF UAS-ATC INTERACTIONS
SO 2013 IEEE/AIAA 32ND DIGITAL AVIONICS SYSTEMS CONFERENCE (DASC)
SE IEEE-AIAA Digital Avionics Systems Conference
LA English
DT Proceedings Paper
CT IEEE/AIAA 32nd Digital Avionics Systems Conference (DASC)
CY OCT 05-10, 2013
CL New York, NY
SP IEEE, AIAA, BOEING, LRDC Systems LLC, SAAB, AVIONICS
AB Successful integration of UAS in the NAS will require that UAS interactions with the air traffic management system be similar to interactions between manned aircraft and air traffic management. For example, UAS response times to ATCo clearances should be equivalent to those that are currently found to be acceptable with manned aircraft. Prior studies have examined communication delays with manned aircraft. Unfortunately, there is no analogous body of research for UAS. The goal of the present study was to determine how UAS pilot communication and execution delays affect ATCos' acceptability ratings of UAS pilot responses when the UAS is operating in the NAS. Eight radar-certified controllers managed traffic in a modified ZLA sector with one UAS flying in it. In separate scenarios, the UAS pilot verbal communication and execution delays were either short (1.5 s) or long (5 s) and either constant or variable. The ATCo acceptability of UAS pilot communication and execution delays were measured subjectively via post trial ratings. UAS verbal pilot communication delay, were rated as acceptable 92% of the time when the delay was short. This acceptability level decreased to 64% when the delay was long. UAS pilot execution delay had less of an influence on ATCo acceptability ratings in the present stimulation. Implications of these findings for UAS in the NAS integration are discussed.
C1 [Vu, Kim-Phuong L.; Morales, Gregory; Chiappe, Dan; Strybel, Thomas Z.] Ctr Human Factors Adv Aeronaut Technol, Long Beach, CA USA.
   [Vu, Kim-Phuong L.; Morales, Gregory; Chiappe, Dan; Strybel, Thomas Z.] Calif State Univ Long Beach, Long Beach, CA 90840 USA.
   [Battiste, Vernol; Shively, Jay] NASA, Ames Res Ctr, Moffett Field, CA USA.
   [Battiste, Vernol] San Jose State Fdn, Moffett Field, CA USA.
   [Buker, Timothy J.] SAIC, Washington, DC USA.
RP Vu, KPL (reprint author), Ctr Human Factors Adv Aeronaut Technol, Long Beach, CA USA.
NR 10
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7195
BN 978-1-4799-1536-1; 978-1-4799-1538-5
J9 IEEEAAIA DIGIT AVION
PY 2013
PG 9
WC Engineering, Aerospace
SC Engineering
GA BC1KH
UT WOS:000350222202010
ER

PT S
AU Wu, SC
   Luna, R
   Johnson, WW
AF Wu, Shu-Chieh
   Luna, Rocio
   Johnson, Walter W.
GP IEEE
TI Flight Deck Weather Avoidance Decision Support: Implementation and
   Evaluation
SO 2013 IEEE/AIAA 32ND DIGITAL AVIONICS SYSTEMS CONFERENCE (DASC)
SE IEEE-AIAA Digital Avionics Systems Conference
LA English
DT Proceedings Paper
CT IEEE/AIAA 32nd Digital Avionics Systems Conference (DASC)
CY OCT 05-10, 2013
CL New York, NY
SP IEEE, AIAA, BOEING, LRDC Systems LLC, SAAB, AVIONICS
C1 [Wu, Shu-Chieh; Luna, Rocio] San Jose State Univ, San Jose, CA 95192 USA.
   [Johnson, Walter W.] NASA, Ames Res Ctr, Mountain View, CA USA.
RP Wu, SC (reprint author), San Jose State Univ, San Jose, CA 95192 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7195
BN 978-1-4799-1536-1; 978-1-4799-1538-5
J9 IEEEAAIA DIGIT AVION
PY 2013
PG 23
WC Engineering, Aerospace
SC Engineering
GA BC1KH
UT WOS:000350222205031
ER

PT S
AU Wu, SC
   Luna, R
   Johnson, WW
AF Wu, Shu-Chieh
   Luna, Rocio
   Johnson, Walter W.
GP IEEE
TI FLIGHT DECK WEATHER AVOIDANCE DECISION SUPPORT: IMPLEMENTATION AND
   EVALUATION
SO 2013 IEEE/AIAA 32ND DIGITAL AVIONICS SYSTEMS CONFERENCE (DASC)
SE IEEE-AIAA Digital Avionics Systems Conference
LA English
DT Proceedings Paper
CT IEEE/AIAA 32nd Digital Avionics Systems Conference (DASC)
CY OCT 05-10, 2013
CL New York, NY
SP IEEE, AIAA, BOEING, LRDC Systems LLC, SAAB, AVIONICS
ID 3D DISPLAYS; 2D
AB Weather related disruptions account for seventy percent of the delays in the National Airspace System (NAS). A key component in the weather plan of the Next Generation of Air Transportation System (NextGen) is to assimilate observed weather information and probabilistic forecasts into the decision process of flight crews and air traffic controllers. In this research we explore supporting flight crew weather decision making through the development of a flight deck predicted weather display system that utilizes weather predictions generated by ground-based radar. This system integrates and presents this weather information, together with in-flight trajectory modification tools, within a cockpit display of traffic information (CDTI) prototype. that the CDTI features 2D and perspective 3D visualization models of weather. The weather forecast products that we implemented were the Corridor Integrated Weather System (CIWS) and the Convective Weather Avoidance Model (CWAM), both developed by MIT Lincoln Lab. We evaluated the use of CIWS and CWAM for flight deck weather avoidance in two part-task experiments. Experiment 1 compared pilots' en route weather avoidance performance in four weather information conditions that differed in the type and amount of predicted forecast (CIWS current weather only, CIWS current and historical weather, CIWS current and forecast weather, CIWS current and forecast weather and CWAM predictions). Experiment 2 compared the use of perspective 3D and 21/2D presentations of weather for flight deck weather avoidance. Results showed that pilots could take advantage of longer range predicted weather forecasts in performing en route weather avoidance but more research will be needed to determine what combinations of information are optimal and how best to present them.
C1 [Wu, Shu-Chieh; Luna, Rocio] San Jose State Univ, San Jose, CA 95192 USA.
   [Wu, Shu-Chieh; Luna, Rocio; Johnson, Walter W.] NASA Ames Res Ctr, Washington, DC USA.
RP Wu, SC (reprint author), San Jose State Univ, San Jose, CA 95192 USA.
NR 13
TC 0
Z9 0
U1 1
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7195
BN 978-1-4799-1536-1; 978-1-4799-1538-5
J9 IEEEAAIA DIGIT AVION
PY 2013
PG 13
WC Engineering, Aerospace
SC Engineering
GA BC1KH
UT WOS:000350222201039
ER

PT S
AU Zelinski, S
AF Zelinski, Shannon
GP IEEE
TI Design Considerations for Shortcut Path-Based Time Recovery
SO 2013 IEEE/AIAA 32ND DIGITAL AVIONICS SYSTEMS CONFERENCE (DASC)
SE IEEE-AIAA Digital Avionics Systems Conference
LA English
DT Proceedings Paper
CT IEEE/AIAA 32nd Digital Avionics Systems Conference (DASC)
CY OCT 05-10, 2013
CL New York, NY
SP IEEE, AIAA, BOEING, LRDC Systems LLC, SAAB, AVIONICS
C1 NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
RP Zelinski, S (reprint author), NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
EM shannon.j.zelinski@nasa.gov
NR 0
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7195
BN 978-1-4799-1536-1; 978-1-4799-1538-5
J9 IEEEAAIA DIGIT AVION
PY 2013
PG 32
WC Engineering, Aerospace
SC Engineering
GA BC1KH
UT WOS:000350222203012
ER

PT S
AU Zelinski, SJ
AF Zelinski, Shannon J.
GP IEEE
TI DESIGN CONSIDERATIONS FOR SHORTCUT PATH-BASED TIME RECOVERY
SO 2013 IEEE/AIAA 32ND DIGITAL AVIONICS SYSTEMS CONFERENCE (DASC)
SE IEEE-AIAA Digital Avionics Systems Conference
LA English
DT Proceedings Paper
CT IEEE/AIAA 32nd Digital Avionics Systems Conference (DASC)
CY OCT 05-10, 2013
CL New York, NY
SP IEEE, AIAA, BOEING, LRDC Systems LLC, SAAB, AVIONICS
AB This paper introduces the concept of using tactical shortcuts to improve arrival precision and thereby increase throughput. This concept schedules flights to a longer path for which a shortcut path option is available for time recovery when speed is restricted. Shortcut design parameter sensitivity for schedule-based and spacing-based use policies is explored for single vs. multiple shortcut designs and shortcut availability. Simulation results show schedule-based shortcuts can reduce scheduling buffer size by 35-55% (increasing maximum throughput) or reduce separation violation probability 15-20% (reducing controller workload). Spacing-based shortcuts can reduce scheduling buffer size or separation violation probability by an additional 20% or 5% respectively. Additional studies were conducted to evaluate throughput and delay performance of each shortcut use policy for a wide range of demand rates. Spacing-based shortcuts performed the best. A use policy that combined the schedule-based shortcut method and scheduling without shortcuts outperformed using either of these methods individually. The potential benefits of using tactical shortcuts warrants future study in its application to multi-point scheduling, performance-based operations, geometric design, and decision support tools.
C1 NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
RP Zelinski, SJ (reprint author), NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
EM Shannon.J.Zelinski@nasa.gov
NR 14
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2155-7195
BN 978-1-4799-1536-1; 978-1-4799-1538-5
J9 IEEEAAIA DIGIT AVION
PY 2013
PG 13
WC Engineering, Aerospace
SC Engineering
GA BC1KH
UT WOS:000350222200023
ER

PT S
AU Kulkarni, CS
   Daigle, M
   Goebel, K
AF Kulkarni, Chetan S.
   Daigle, Matthew
   Goebel, Kai
GP IEEE
TI Implementation of Prognostic Methodologies to Cryogenic Propellant
   Loading Testbed
SO 2013 IEEE AUTOTESTCON
SE IEEE Autotestcon
LA English
DT Proceedings Paper
CT 48th Annual AUTOTESTCON Conference
CY SEP 16-19, 2013
CL Schaumburg, IL
SP IEEE, IEEE Aerosp & Elect Syst Soc, IEEE Instrumentat & Measurement Soc
AB Prognostics methodologies determine the health state of a system and predict the end of life and remaining useful life. This information enables operators to take maintenance-related decisions, thus effectively streamlining operational and mission-level activities. Prognostics testbeds help in the prototyping, development, and maturation of prognostic technologies. In this work, we present a prognostics testbed for pneumatic valves. Pneumatic valves are critical components in many industrial processes, and the testbed will be used to showcase how remaining life prediction works in the context of cryogenic refueling operations. The testbed allows for the injection of time-varying leaks with specified damage progression profiles in order to emulate common valve faults. In addition, the testbed contains a battery used to power some components, allowing the study of the effects of battery degradation on the operation of the valves. Prognostic algorithms will utilize sensor data collected from the different transducers in order to estimate component health and make life predictions, based on mathematical models describing the underlying physics of component degradation and employing a Bayesian filtering algorithm for state-parameter estimation from which life predictions are made.
C1 [Kulkarni, Chetan S.] NASA, Ames Res Ctr, SGT Inc, Moffett Field, CA 94035 USA.
   [Daigle, Matthew; Goebel, Kai] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
RP Kulkarni, CS (reprint author), NASA, Ames Res Ctr, SGT Inc, Moffett Field, CA 94035 USA.
EM chetan.s.kulkarni@nasa.gov; matthew.j.daigle@nasa.gov;
   kai.goebel@nasa.gov
NR 10
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1088-7725
BN 978-1-4673-5681-7; 978-1-4673-5683-1
J9 IEEE AUTOTESTCON
PY 2013
PG 7
WC Engineering, Electrical & Electronic
SC Engineering
GA BE2OR
UT WOS:000369728800054
ER

PT S
AU Tang, A
   Chahat, N
AF Tang, Adrian
   Chahat, Nacer
GP IEEE
TI CMOS mm-Wave Transceiver Techniques beyond 50 GHz
SO 2013 IEEE GLOBAL CONFERENCE ON SIGNAL AND INFORMATION PROCESSING
   (GLOBALSIP)
SE IEEE Global Conference on Signal and Information Processing
LA English
DT Proceedings Paper
CT IEEE Global Conference on Signal and Information Processing (GlobalSIP)
CY DEC 03-05, 2013
CL Austin, TX
SP Inst Elect & Elect Engineers, IEEE Signal Proc Soc
DE millimeter-wave calibration; mm-wave optimization
AB Deep sub-micron scaled CMOS offers relatively low RF performance at mm-wave frequencies compared with III-V technologies and the high levels of process variation further exacerbate design margins and lesser performance. Instead of optimizing mm-wave circuits for performance at design time, we instead adopt a "maximum tune-ability" approach in which the mm-wave front-end circuitry is made highly tunable and optimized at run-time by digital control and optimization algorithms to overcome process variation effects.
C1 [Tang, Adrian; Chahat, Nacer] CALTECH, Jet Prop Lab, Pasadena, CA 91125 USA.
   [Tang, Adrian] Univ Calif Los Angeles, Los Angeles, CA USA.
RP Tang, A (reprint author), CALTECH, Jet Prop Lab, Pasadena, CA 91125 USA.
NR 6
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2376-4066
BN 978-1-4799-0248-4
J9 IEEE GLOB CONF SIG
PY 2013
BP 715
EP 718
PG 4
WC Engineering, Electrical & Electronic
SC Engineering
GA BC2FE
UT WOS:000350825600195
ER

PT S
AU Golpayegani, N
   Halem, M
   Masuoka, EJ
   Devine, NK
   Ye, G
AF Golpayegani, Navid
   Halem, Milton
   Masuoka, Edward J.
   Devine, Neal K.
   Ye, Gang
GP IEEE
TI LVFS: A Scalable Big Data Scientific Storage System
SO 2013 IEEE INTERNATIONAL CONFERENCE ON CLUSTER COMPUTING (CLUSTER)
SE IEEE International Conference on Cluster Computing
LA English
DT Proceedings Paper
CT 15th IEEE International Conference on Cluster Computing (CLUSTER)
CY SEP 23-27, 2013
CL Indianapolis, IN
SP IEEE, Cray Inc, Data Direct Networks, IBM Inc, Matrix Integrat Hewlett Packard, Indiana Univ Pervas Technol Inst, Natl Ctr Genome Anal Support, Case Western Reserve Univ, Univ Chicago Res Comp Ctr, Clemson Univ, Georgia Tech Informat Technol, Univ Miami Ctr Computat Sci, Mississippi State Univ, Univ Notre Dame, San Diego Supercomputer Center
AB LVFS is a virtual scalable file storage system developed in response to a class of scientific data systems that over time continue to collect petabytes of data that begin to seriously impact the response time to user request services. The system has been operational in a real use case, the NASA MODIS Adaptive Processing System (MODAPS), and shown to double data throughput compared to the original system thanks to better performance and easier load balancing. The MODAPS operational life has been extended over a decade as of now and contains over four petabytes of data in over billions of files on over 500 different disks attached to multiple storage nodes. MODAPS is the processing system for delivering calibrated Level 1 data from MODIS instruments on two NASA satellites, each containing 36 channel multi-spectral visible and infrared changes launched over a decade ago. These system's life cycle operations are typical of many scientific instruments and experiments that continue to generate useful archival data well beyond their originial expected lifetime capabilities to meet current scientific user needs. The Level 1 Atmosphere Archive and Distribution System (LAADS) is responsible for distribution of products produced by MODAPS. The LAADS Virtual File System (LVFS) has now replaced parts of LAADS and is responsible for the read only distribution of all LAADS data to the public. In this paper, we describe the unique design of LVFS and, additionally, describe our ongoing work to incorporate a Distributed Hash-based architecture into the LVFS design to transform LVFS into a full scientific storage architecture scalable to Exabyte sizes.
C1 [Golpayegani, Navid; Devine, Neal K.; Ye, Gang] Sigma Space Corp, Lanham, MD 20706 USA.
   [Golpayegani, Navid; Halem, Milton] Univ Maryland, Dept Comp Sci & Elect Engn, Baltimore, MD 21250 USA.
   [Golpayegani, Navid; Masuoka, Edward J.] NASA, Goddard Space Flight Ctr, Terrestrial Informat Syst lab, Greenbelt, MD 20771 USA.
RP Golpayegani, N (reprint author), Sigma Space Corp, Lanham, MD 20706 USA.
NR 15
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1552-5244
BN 978-1-4799-0898-1
J9 IEEE INT C CL COMP
PY 2013
PG 5
WC Computer Science, Hardware & Architecture; Computer Science, Theory &
   Methods
SC Computer Science
GA BC0OA
UT WOS:000349249800083
ER

PT J
AU Nourani-Vatani, N
   De Deuge, M
   Douillard, B
   Williams, SB
AF Nourani-Vatani, Navid
   De Deuge, Mark
   Douillard, Bertrand
   Williams, Stefan B.
GP IEEE
TI An analysis of monochrome conversions and normalizations on the Local
   Binary Patterns texture descriptors
SO 2013 IEEE INTERNATIONAL CONFERENCE ON COMPUTER VISION WORKSHOPS (ICCVW)
LA English
DT Proceedings Paper
CT IEEE International Conference on Computer Vision Workshops (ICCVW)
CY DEC 01-08, 2013
CL Sydney, AUSTRALIA
SP IEEE, CVF, IEEE Comp Soc, APRS, Australiasn Natl Univ, NICTA, FACE++, Natl Robot Engn Ctr, Google, Disney Res, nVIDIA, Raytheon BBN Technologies, Facebook, Adobe, Kitware, OMRON, SRI Int
ID FACE RECOGNITION; CLASSIFICATION; FEATURES; HISTOGRAMS; SCALE
AB While the importance of the choice of color space for color descriptors has been studied extensively, a similar study for image texture descriptors is missing. This publication investigates the effect of color-to-monochrome conversions, image normalization, and metrics on the discriminative power of texture descriptors. The measure of the discriminative power of a feature is formulated as supervised spectral feature analysis. This analysis allows to measure the relative performance of a feature under varying conditions as long as the feature dimension is maintained. Feature discrimination evaluation is applied to Local Binary Patterns texture descriptors and it is shown how the proposed metric directly maps to classification performance. Based on this metric, we demonstrate that the choice of color-to-monochrome conversion and normalization can have a significant effect on the performance of the LBP descriptors.
C1 [Nourani-Vatani, Navid; De Deuge, Mark; Williams, Stefan B.] Univ Sydney, Australian Ctr Field Robot, Darlington, NSW 2050, Australia.
   [Douillard, Bertrand] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
RP Nourani-Vatani, N (reprint author), Univ Sydney, Australian Ctr Field Robot, Darlington, NSW 2050, Australia.
EM n.nourani-vatani@acfr.usyd.edu.au; m.dedeuge@acfr.usyd.edu.au;
   b.douillard@acfr.usyd.edu.au; s.williams@acfr.usyd.edu.au
RI Nourani, Vahid/F-4051-2017; 
OI Williams, Stefan/0000-0001-9416-5639
NR 26
TC 1
Z9 1
U1 2
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4799-3022-7
PY 2013
BP 831
EP 837
DI 10.1109/ICCVW.2013.114
PG 7
WC Computer Science, Artificial Intelligence; Engineering, Electrical &
   Electronic
SC Computer Science; Engineering
GA BC0YT
UT WOS:000349847200113
ER

PT J
AU Barton, RJ
AF Barton, Richard J.
GP IEEE
TI Some Fundamental Limits on SAW RFID Tag Information Capacity and
   Collision Resolution
SO 2013 IEEE INTERNATIONAL CONFERENCE ON WIRELESS FOR SPACE AND EXTREME
   ENVIRONMENTS (WISEE 2013)
LA English
DT Proceedings Paper
CT IEEE International Conference on Wireless for Space and Extreme
   Environments
CY NOV 07-09, 2013
CL Canadian Space Agcy, Baltimore, MD
SP IEEE, IEEE USA, IEEE Canada, IEEE Baltimore Sect, UFFC Soc, IEEE APS, IEEE Tech Comm RFID, IEEE Commun Soc, NASA, European Space Agcy
HO Canadian Space Agcy
DE SAW; RFID; Information Capacity; Collision Resolution; Remote Sensing;
   Passive Sensing
AB In this paper, we apply results from multi-user information theory to study the limits of information capacity and collision resolution for SAW RFID tags. In particular, we derive bounds on the achievable data rate per tag as a function of fundamental parameters such as tag time-bandwidth product, tag signal-to-noise ratio (SNR), and number of tags in the environment. We also discuss the implications of these bounds for tag waveform design and tag interrogation efficiency.
C1 NASA, Lyndon B Johnson Space Ctr, Avion Syst Div, Houston, TX 77058 USA.
RP Barton, RJ (reprint author), NASA, Lyndon B Johnson Space Ctr, Avion Syst Div, Houston, TX 77058 USA.
EM richard.j.barton@nasa.gov
NR 16
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
PY 2013
PG 7
WC Engineering, Aerospace; Computer Science, Hardware & Architecture;
   Telecommunications
SC Engineering; Computer Science; Telecommunications
GA BC2FB
UT WOS:000350820800012
ER

PT J
AU Contreras, MT
   Trease, BP
   Sherwood, B
AF Contreras, Michael T.
   Trease, Brian P.
   Sherwood, Brent
GP IEEE
TI The Solar Umbrella: a Low-Cost Demonstration of Scalable Space Based
   Solar Power
SO 2013 IEEE INTERNATIONAL CONFERENCE ON WIRELESS FOR SPACE AND EXTREME
   ENVIRONMENTS (WISEE 2013)
LA English
DT Proceedings Paper
CT IEEE International Conference on Wireless for Space and Extreme
   Environments
CY NOV 07-09, 2013
CL Canadian Space Agcy, Baltimore, MD
SP IEEE, IEEE USA, IEEE Canada, IEEE Baltimore Sect, UFFC Soc, IEEE APS, IEEE Tech Comm RFID, IEEE Commun Soc, NASA, European Space Agcy
HO Canadian Space Agcy
AB Within the past decade, the Space Solar Power (SSP) community has seen an influx of stakeholders willing to entertain the SSP prospect of potentially boundless, base-load solar energy. Interested parties affiliated with the Department of Defense (DoD), the private sector, and various international entities have all agreed that while the benefits of SSP are tremendous and potentially profitable, the risk associated with developing an efficient end to end SSP harvesting system is still very high. In an effort to reduce the implementation risk for future SSP architectures, this study proposes a system level design that is both low-cost and seeks to demonstrate the furthest transmission of wireless power to date. The overall concept is presented and each subsystem is explained in detail with best estimates of current implementable technologies. Basic cost models were constructed based on input from JPL subject matter experts and assume that the technology demonstration would be carried out by a federally funded entity. The main thrust of the architecture is to demonstrate that a usable amount of solar power can be safely and reliably transmitted from space to the Earth's surface; however, maximum power scalability limits and their cost implications are discussed.
C1 [Contreras, Michael T.; Trease, Brian P.; Sherwood, Brent] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
RP Contreras, MT (reprint author), CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
EM Michael.T.Contreras@jpl.nasa.gov; Brian.P.Trease@jpl.nasa.gov;
   Brent.Sherwood@jpl.nasa.gov
NR 14
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
PY 2013
PG 6
WC Engineering, Aerospace; Computer Science, Hardware & Architecture;
   Telecommunications
SC Engineering; Computer Science; Telecommunications
GA BC2FB
UT WOS:000350820800035
ER

PT J
AU Ijaz, B
   Sanyal, A
   Mendoza-Radal, A
   Roy, S
   Ullah, I
   Reich, MT
   Dawn, D
   Braaten, BD
   Chamberlain, NF
   Anagnostou, DE
AF Ijaz, Bilal
   Sanyal, Alarka
   Mendoza-Radal, Alfonso
   Roy, Sayan
   Ullah, Irfan
   Reich, Michael T.
   Dawn, Debasis
   Braaten, Benjamin D.
   Chamberlain, Neil F.
   Anagnostou, Dimitris E.
GP IEEE
TI Gain Limits of Phase Compensated Conformal Antenna Arrays on
   Non-Conducting Spherical Surfaces using the Projection Method
SO 2013 IEEE INTERNATIONAL CONFERENCE ON WIRELESS FOR SPACE AND EXTREME
   ENVIRONMENTS (WISEE 2013)
LA English
DT Proceedings Paper
CT IEEE International Conference on Wireless for Space and Extreme
   Environments
CY NOV 07-09, 2013
CL Canadian Space Agcy, Baltimore, MD
SP IEEE, IEEE USA, IEEE Canada, IEEE Baltimore Sect, UFFC Soc, IEEE APS, IEEE Tech Comm RFID, IEEE Commun Soc, NASA, European Space Agcy
HO Canadian Space Agcy
DE conformal antenna array; phase compensation
AB Previously, it has been shown that the projection method can be used as an effective tool to compute the appropriate phase compensation of a conformal antenna array on a spherical surface. In this paper, the projection method is used to study the gain limitations of a phase-compensated six-element conformal microstrip antenna array on non-conducting spherical surfaces. As a metric for comparison, the computed gain of the phase-compensated conformal array is compared to the gain of a six-element reference antenna on a flat surface with the same inter-element spacing and operating frequency. To validate these computations, a conformal phased-array antenna consisting of six individual microstrip patches, voltage controlled phase shifters and a power divider was assembled and tested at 2.22 GHz. Overall, it is shown how much less the gain of the phase-compensated antenna is than the reference antenna for various radius values of the sphere.
C1 [Ijaz, Bilal; Sanyal, Alarka; Mendoza-Radal, Alfonso; Roy, Sayan; Ullah, Irfan; Reich, Michael T.; Dawn, Debasis; Braaten, Benjamin D.] N Dakota State Univ, Dept Elect & Comp Engn, Fargo, ND 58102 USA.
   [Chamberlain, Neil F.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
   [Anagnostou, Dimitris E.] South Dakota Sch Mines & Technol, Dept Elect & Comp Engn, Rapid City, SD 57701 USA.
RP Ijaz, B (reprint author), N Dakota State Univ, Dept Elect & Comp Engn, Fargo, ND 58102 USA.
EM bilal.ijaz@ndsu.edu
RI Anagnostou, Dimitris/A-3124-2009
OI Anagnostou, Dimitris/0000-0003-4266-0309
NR 23
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
PY 2013
PG 6
WC Engineering, Aerospace; Computer Science, Hardware & Architecture;
   Telecommunications
SC Engineering; Computer Science; Telecommunications
GA BC2FB
UT WOS:000350820800015
ER

PT J
AU Lansdowne, CA
   Steele, GF
   Zucha, JP
   Schlesinger, AM
AF Lansdowne, Chatwin A.
   Steele, Glen F.
   Zucha, Joan P.
   Schlesinger, Adam M.
GP IEEE
TI Closed-Loop Analysis of Soft Decisions for Serial Links
SO 2013 IEEE INTERNATIONAL CONFERENCE ON WIRELESS FOR SPACE AND EXTREME
   ENVIRONMENTS (WISEE 2013)
LA English
DT Proceedings Paper
CT IEEE International Conference on Wireless for Space and Extreme
   Environments
CY NOV 07-09, 2013
CL Canadian Space Agcy, Baltimore, MD
SP IEEE, IEEE USA, IEEE Canada, IEEE Baltimore Sect, UFFC Soc, IEEE APS, IEEE Tech Comm RFID, IEEE Commun Soc, NASA, European Space Agcy
HO Canadian Space Agcy
DE block codes; channel coding; codes; satellite communication; test
   equipment
AB We describe the benefit of using closed-loop measurements for a radio receiver paired with a counterpart transmitter. We show that real-time analysis of the soft decision output of a receiver can provide rich and relevant insight far beyond the traditional hard-decision bit error rate (BER) test statistic. We describe a Soft Decision Analyzer (SDA) implementation for closed-loop measurements on single-or dual (orthogonal) channel serial data communication links. The analyzer has been used to identify, quantify, and prioritize contributors to implementation loss in live-time during the development of software defined radios. This test technique gains importance as modern receivers are providing soft decision symbol synchronization as radio links are challenged to push more data and more protocol overhead through noisier channels, and software-defined radios (SDRs) use error-correction codes that approach Shannon's theoretical limit of performance.
C1 [Lansdowne, Chatwin A.; Steele, Glen F.; Schlesinger, Adam M.] Natl Aeronaut & Space Adm, Houston, TX 77058 USA.
   [Zucha, Joan P.] Natl Aeronaut & Space Adm, ITT, Houston, TX 77058 USA.
RP Lansdowne, CA (reprint author), Natl Aeronaut & Space Adm, Houston, TX 77058 USA.
EM chatwin.lansdowne@nasa.gov; glen.f.steele@nasa.gov;
   joan.zucha-1@nasa.gov; adam.m.schlesinger@nasa.gov
NR 9
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
PY 2013
PG 6
WC Engineering, Aerospace; Computer Science, Hardware & Architecture;
   Telecommunications
SC Engineering; Computer Science; Telecommunications
GA BC2FB
UT WOS:000350820800001
ER

PT J
AU Wilson, WC
   Atkinson, GM
AF Wilson, William C.
   Atkinson, Gary M.
GP IEEE
TI Wireless Sensor Applications in Extreme Aeronautical Environments
SO 2013 IEEE INTERNATIONAL CONFERENCE ON WIRELESS FOR SPACE AND EXTREME
   ENVIRONMENTS (WISEE 2013)
LA English
DT Proceedings Paper
CT IEEE International Conference on Wireless for Space and Extreme
   Environments
CY NOV 07-09, 2013
CL Canadian Space Agcy, Baltimore, MD
SP IEEE, IEEE USA, IEEE Canada, IEEE Baltimore Sect, UFFC Soc, IEEE APS, IEEE Tech Comm RFID, IEEE Commun Soc, NASA, European Space Agcy
HO Canadian Space Agcy
ID DEVICES
AB NASA aeronautical programs require rigorous ground and flight testing. Many of the testing environments can be extremely harsh. These environments include cryogenic temperatures and high temperatures (greater than 1500 degrees C). Temperature, pressure, vibration, ionizing radiation, and chemical exposure may all be part of the harsh environment found in testing. This paper presents a survey of research opportunities for universities and industry to develop new wireless sensors that address anticipated structural health monitoring (SHM) and testing needs for aeronautical vehicles. Potential applications of passive wireless sensors for ground testing and high altitude aircraft operations are presented. Some of the challenges and issues of the technology are also presented.
C1 [Wilson, William C.] NASA, Langley Res Ctr, Nondestruct Evaluat Branch, Hampton, VA 23681 USA.
   [Atkinson, Gary M.] Virginia Commonwealth Univ, Elect & Comp Engn, Richmond, VA 23284 USA.
RP Wilson, WC (reprint author), NASA, Langley Res Ctr, Nondestruct Evaluat Branch, Hampton, VA 23681 USA.
EM gmatkins@vcu.edu
NR 36
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
PY 2013
PG 6
WC Engineering, Aerospace; Computer Science, Hardware & Architecture;
   Telecommunications
SC Engineering; Computer Science; Telecommunications
GA BC2FB
UT WOS:000350820800014
ER

PT S
AU O'Neill, P
   Kurum, M
   Joseph, A
   Fuchs, J
   Young, P
   Cosh, M
   Lang, R
AF O'Neill, P.
   Kurum, M.
   Joseph, A.
   Fuchs, J.
   Young, P.
   Cosh, M.
   Lang, R.
GP IEEE
TI L-BAND ACTIVE / PASSIVE TIME SERIES MEASUREMENTS OVER A GROWING SEASON
   USING THE COMRAD GROUND-BASED SMAP SIMULATOR
SO 2013 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS)
SE IEEE International Symposium on Geoscience and Remote Sensing IGARSS
LA English
DT Proceedings Paper
CT IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
CY JUL 21-26, 2013
CL Melbourne, AUSTRALIA
SP IEEE, Inst Elect & Elect Engineers, Geoscience & Remote Sensing Soc
DE soil moisture; microwave; geophysical retrievals; ComRAD; SMAP; corn;
   soybeans
AB Once launched in late 2014, NASA's Soil Moisture Active Passive (SMAP) mission will use a combination of a four-channel L-band radiometer and a three-channel L-band radar to provide high resolution global mapping of soil moisture and landscape freeze/thaw state every 2-3 days. These measurements are valuable to improved understanding of the Earth's water, energy, and carbon cycles, and to many applications of societal benefit. In order for soil moisture to be retrieved accurately from SMAP microwave data, prelaunch activities are concentrating on developing improved geophysical retrieval algorithms for each of the SMAP baseline products. The ComRAD truck-based SMAP simulator collected active/passive microwave time series data at the SMAP incident angle of 40 degrees over corn and soybeans during 2012 for use in refining SMAP retrieval algorithms.
C1 [O'Neill, P.; Kurum, M.; Joseph, A.; Fuchs, J.; Young, P.] NASA, Hydrol Sci Lab, Code 617, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
   [Cosh, M.] US Dept Agr, Agr Res Serv, Hydrol & Remote Sensing Lab, Beltsville, MD 20105 USA.
   [Lang, R.] George Washington Univ, Dept Elect & Comp Engn, Washington, DC 20052 USA.
RP O'Neill, P (reprint author), NASA, Hydrol Sci Lab, Code 617, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
EM Peggy.E.ONeill@nasa.gov
RI Cosh, MIchael/A-8858-2015
OI Cosh, MIchael/0000-0003-4776-1918
NR 3
TC 1
Z9 1
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-6996
BN 978-1-4799-1114-1
J9 INT GEOSCI REMOTE SE
PY 2013
BP 37
EP 40
DI 10.1109/IGARSS.2013.6721086
PG 4
WC Engineering, Electrical & Electronic; Geosciences, Multidisciplinary;
   Remote Sensing
SC Engineering; Geology; Remote Sensing
GA BB7JO
UT WOS:000345638900010
ER

PT S
AU Misra, S
   Johnson, J
   Aksoy, M
   Peng, JZ
   Bradley, D
   Dwyer, IO
   Padmanabhan, S
   Dawson, D
   Chazanoff, S
   Latham, B
   Gaier, T
   Flores-Helizon, C
   Denning, R
AF Misra, Sidharth
   Johnson, Joel
   Aksoy, Mustafa
   Peng, Jinzheng
   Bradley, Damon
   Dwyer, Ian O'
   Padmanabhan, Sharmila
   Dawson, Douglas
   Chazanoff, Seth
   Latham, Barron
   Gaier, Todd
   Flores-Helizon, Caroline
   Denning, Richard
GP IEEE
TI SMAP RFI mitigation algorithm performance characterization using
   airborne high-rate direct-sampled SMAPVEX 2012 data
SO 2013 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS)
SE IEEE International Symposium on Geoscience and Remote Sensing IGARSS
LA English
DT Proceedings Paper
CT IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
CY JUL 21-26, 2013
CL Melbourne, AUSTRALIA
SP IEEE, Inst Elect & Elect Engineers, Geoscience & Remote Sensing Soc
DE Microwave radiometer; radio frequency interference; SMAP
ID PULSED SINUSOIDAL RFI; RADIOFREQUENCY INTERFERENCE; MICROWAVE
   RADIOMETRY; DETECTOR; KURTOSIS
AB The SMAP RFI detecting digital backend performance is characterized using real-environment L-band RFI data from the SMAPVEX 2012 campaign. Various types of RFI signals are extracted from the airborne campaign dataset and fed to the SMAP radiometer using an Arbitrary Waveform Generator (AWG). The backend detection performance is tested, and missed-detections are further investigated. Initial results indicate RFI detection performance for the SMAP digital backend is acceptable.
C1 [Misra, Sidharth; Dwyer, Ian O'; Padmanabhan, Sharmila; Dawson, Douglas; Chazanoff, Seth; Latham, Barron; Gaier, Todd; Flores-Helizon, Caroline; Denning, Richard] CALTECH, Jet Prop Lab, Pasadena, CA 91125 USA.
   [Johnson, Joel; Aksoy, Mustafa] Ohio State Univ, Columbus, OH USA.
   [Peng, Jinzheng] Morgan State Univ, NASA, Goddard Space Flight Ctr, Greenbelt, MD USA.
   [Bradley, Damon] NASA, Goddard Space Flight Ctr, Greenbelt, MD USA.
RP Misra, S (reprint author), CALTECH, Jet Prop Lab, Pasadena, CA 91125 USA.
NR 22
TC 3
Z9 3
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-6996
BN 978-1-4799-1114-1
J9 INT GEOSCI REMOTE SE
PY 2013
BP 41
EP 44
DI 10.1109/IGARSS.2013.6721087
PG 4
WC Engineering, Electrical & Electronic; Geosciences, Multidisciplinary;
   Remote Sensing
SC Engineering; Geology; Remote Sensing
GA BB7JO
UT WOS:000345638900011
ER

PT S
AU Narvekar, PS
   Entekhabi, D
   Kim, S
   Njoku, E
AF Narvekar, Parag S.
   Entekhabi, Dara
   Kim, Seungbum
   Njoku, Eni
GP IEEE
TI A ROBUST ALGORITHM FOR SOIL MOISTURE RETRIEVAL FROM THE SOIL MOISTURE
   ACTIVE PASSIVE MISSION RADAR OBSERVATIONS
SO 2013 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS)
SE IEEE International Symposium on Geoscience and Remote Sensing IGARSS
LA English
DT Proceedings Paper
CT IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
CY JUL 21-26, 2013
CL Melbourne, AUSTRALIA
SP IEEE, Inst Elect & Elect Engineers, Geoscience & Remote Sensing Soc
DE SMAP; L-band Radar; soil moisture
AB The Soil Moisture Active Passive (SMAP) mission will combine spaceborne L-band radar and radiometer observations to provide improved estimates of Earth's surface geophysical parameters. In this paper we present a new robust radar-only snapshot approach (independent of ancillary data on roughness and vegetation) for mapping near real-time soil moisture at high spatial resolution. Simple formulations are developed based on traditional theories and parameterizations are obtained using electromagnetic scattering basis available in the form of "data cubes". This new algorithm is tested using Passive and Active L- and S-band (PALS) airborne data and in situ soil moisture observations acquired during different field campaigns, i.e., SGP99, SMEX02, CLASIC07 and SMAPVEX08. The soil moisture retrieval root mean square error observed is in the range of the quality target (0.06 cm(3)/cm(3)) set for the SMAP mission.
C1 [Narvekar, Parag S.; Entekhabi, Dara] MIT, 77 Massachusetts Ave, Cambridge, MA 02139 USA.
   [Kim, Seungbum; Njoku, Eni] JPL, Pasadena, CA USA.
RP Narvekar, PS (reprint author), MIT, 77 Massachusetts Ave, Cambridge, MA 02139 USA.
NR 10
TC 1
Z9 1
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-6996
BN 978-1-4799-1114-1
J9 INT GEOSCI REMOTE SE
PY 2013
BP 45
EP 48
DI 10.1109/IGARSS.2013.6721088
PG 4
WC Engineering, Electrical & Electronic; Geosciences, Multidisciplinary;
   Remote Sensing
SC Engineering; Geology; Remote Sensing
GA BB7JO
UT WOS:000345638900012
ER

PT S
AU Hilliard, LM
   Beaudoin, C
   Corey, BE
   Tourain, CL
   Petrachenko, B
   Dickey, J
AF Hilliard, Lawrence M.
   Beaudoin, C.
   Corey, B. E.
   Tourain, C. L.
   Petrachenko, B.
   Dickey, John
GP IEEE
TI THE SPACE GEODESY PROJECT AND RADIO FREQUENCY INTERFERENCE
   CHARACTERIZATION AND MITIGATION
SO 2013 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS)
SE IEEE International Symposium on Geoscience and Remote Sensing IGARSS
LA English
DT Proceedings Paper
CT IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
CY JUL 21-26, 2013
CL Melbourne, AUSTRALIA
SP IEEE, Inst Elect & Elect Engineers, Geoscience & Remote Sensing Soc
AB The Space Geodesy Project (SGP) development by NASA is an effort to co-locate the four international geodetic techniques Satellite Laser Ranging (SLR) and Lunar Laser Ranging (LLR), Very Long Baseline Interferometry (VLBI), Global Navigation Satellite System (GNSS), and Doppler Orbitography and Radiopositioning Integrated by Satellite (DORIS) into one tightly referenced campus and coordinated reference frame analysis. The SGP requirement locates these stations within a small area to maintain line-of-sight and frequent automated survey known as the vector tie system. This causes a direct conflict with the new broadband VLBI technique. Broadband means 2-14 GHz, and RFI susceptibility at -80 dBW or higher due to sensitive RF components in the front end of the radio receiver.
C1 [Hilliard, Lawrence M.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
   [Beaudoin, C.; Corey, B. E.] MIT Haystack Observ, Westford, MA USA.
   [Tourain, C. L.] CNES, Toulouse, France.
   [Petrachenko, B.] CNR, Ottawa, ON, Canada.
   [Dickey, John] Univ Tasmania, Hobart, Tas 7001, Australia.
RP Hilliard, LM (reprint author), NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
OI Dickey, John/0000-0002-6300-7459
NR 3
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-6996
BN 978-1-4799-1114-1
J9 INT GEOSCI REMOTE SE
PY 2013
BP 278
EP 281
DI 10.1109/IGARSS.2013.6721146
PG 4
WC Engineering, Electrical & Electronic; Geosciences, Multidisciplinary;
   Remote Sensing
SC Engineering; Geology; Remote Sensing
GA BB7JO
UT WOS:000345638900068
ER

PT S
AU Xiong, X
   Oudrari, H
   Chiang, K
   McIntire, J
   Fulbright, J
   Lei, N
   Sun, J
   Efremova, B
   Wang, Z
   Butler, J
AF Xiong, X.
   Oudrari, H.
   Chiang, K.
   McIntire, J.
   Fulbright, J.
   Lei, N.
   Sun, J.
   Efremova, B.
   Wang, Z.
   Butler, J.
GP IEEE
TI VIIRS ON-ORBIT CALIBRATION ACTIVITIES AND PERFORMANCE
SO 2013 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS)
SE IEEE International Symposium on Geoscience and Remote Sensing IGARSS
LA English
DT Proceedings Paper
CT IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
CY JUL 21-26, 2013
CL Melbourne, AUSTRALIA
SP IEEE, Inst Elect & Elect Engineers, Geoscience & Remote Sensing Soc
DE S-NPP; VIIRS; SDR; Calibration; VCST
AB The Visible Infrared Imaging Radiometer Suite (VIIRS) onboard the Suomi National Polar-orbiting Partnership (S-NPP) spacecraft was launched on October 28, 2011. The S-NPP is orbiting the Earth in a sun-synchronous plane with nominal 13: 30 local equatorial crossing time. The VIIRS nadir aperture door was opened on November 21, followed by cryo-cooler door opening on January 18, 2012. The NASA VCST team has carried out a series of VIIRS prelaunch and on-orbit calibration activities and analyses in support of the sensor data records validation and improvement. The sensor and its on-board calibrators have been successfully operated for more than one and a half years.
C1 [Xiong, X.; Butler, J.] NASA, Sci & Explorat Directorate, GSFC, Greenbelt, MD 20771 USA.
   [Oudrari, H.; Chiang, K.; McIntire, J.; Fulbright, J.; Lei, N.; Sun, J.; Efremova, B.; Wang, Z.] Sigma Space Corp, Lanham, MD 20706 USA.
RP Xiong, X (reprint author), NASA, Sci & Explorat Directorate, GSFC, Greenbelt, MD 20771 USA.
NR 4
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-6996
BN 978-1-4799-1114-1
J9 INT GEOSCI REMOTE SE
PY 2013
BP 520
EP 523
DI 10.1109/IGARSS.2013.6721207
PG 4
WC Engineering, Electrical & Electronic; Geosciences, Multidisciplinary;
   Remote Sensing
SC Engineering; Geology; Remote Sensing
GA BB7JO
UT WOS:000345638900127
ER

PT S
AU Villalon-Turrubiates, IE
   Faus-Landeros, GE
   Celarier, EA
AF Villalon-Turrubiates, Ivan E.
   Faus-Landeros, Gloria E.
   Celarier, Edward A.
GP IEEE
TI SATELLITE MEASUREMENTS OF THE ANGSTROM EXPONENT USING AN INNOVATIVE
   MATHEMATICAL METHOD TO IDENTIFY SEASONAL AEROSOLS
SO 2013 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS)
SE IEEE International Symposium on Geoscience and Remote Sensing IGARSS
LA English
DT Proceedings Paper
CT IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
CY JUL 21-26, 2013
CL Melbourne, AUSTRALIA
SP IEEE, Inst Elect & Elect Engineers, Geoscience & Remote Sensing Soc
DE Satellite Measurements; Photometry; Remote Sensing; Seasonal Aerosols;
   Angstrom Exponent
AB The remote sensing methods for understanding physical phenomena are being used since the last 50 years. Satellite-based sensors and ground-based sun photometers provides quantitative and qualitative knowledge about the composition of elements within the Earth's atmosphere. One actual problem is the changes on the climate of different regions of the Earth; one of them is related to aerosol climate forcing. Improvement in measurement-based systems is necessary to identify remaining issues and improve quantification of aerosol effects on climate. Also the improvement in modeling is necessary to confidently extend estimates of forcing to prior times and to project future emissions. Achieving these capabilities will require a synergistic approach between observational systems and modeling. This paper describes how the study and analysis of satellite-based and ground-based measurements can be used to develop an innovative method, based in the existent methods to calculate some optical properties that will help in characterization of the dominant temporal aerosols found in and around the city of Guadalajara in Mexico, based on previous algorithms. The quantifiable knowledge about the temporal and regional aerosols' optical properties will contribute to future investigations related to their quantitative effects on atmospheric processes in this region.
C1 [Villalon-Turrubiates, Ivan E.] ITESO, Tlaquepaque, Jalisco, Mexico.
   [Faus-Landeros, Gloria E.] Univ Guadalajara, Ctr Univ los Valles, Guadalajara, Jalisco, Mexico.
   [Celarier, Edward A.] NASA, Goddard Space Flight Ctr, Greenbelt, MD USA.
RP Villalon-Turrubiates, IE (reprint author), ITESO, Tlaquepaque, Jalisco, Mexico.
EM villalon@ieee.org; faus.gloria@gmail.com; edward.a.celarier@nasa.gov
NR 5
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-6996
BN 978-1-4799-1114-1
J9 INT GEOSCI REMOTE SE
PY 2013
BP 589
EP 592
DI 10.1109/IGARSS.2013.6721225
PG 4
WC Engineering, Electrical & Electronic; Geosciences, Multidisciplinary;
   Remote Sensing
SC Engineering; Geology; Remote Sensing
GA BB7JO
UT WOS:000345638900144
ER

PT S
AU Guillevic, PC
   Privette, JL
   Yu, YY
   Goettsche, FM
   Hulley, G
   Olioso, A
   Sobrino, J
   Meyers, T
   Ghent, D
   Bork-Unkelbach, A
   Courault, D
   Roman, MO
   Hook, S
   Csiszar, I
AF Guillevic, Pierre C.
   Privette, Jeffrey L.
   Yu, Yunyue
   Goettsche, Frank M.
   Hulley, Glynn
   Olioso, Albert
   Sobrino, Jose
   Meyers, Tilden
   Ghent, Darren
   Bork-Unkelbach, Annika
   Courault, Dominique
   Roman, Miguel O.
   Hook, Simon
   Csiszar, Ivan
GP IEEE
TI NPP VIIRS LAND SURFACE TEMPERATURE PRODUCT VALIDATION USING WORLDWIDE
   OBSERVATION NETWORKS
SO 2013 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS)
SE IEEE International Symposium on Geoscience and Remote Sensing IGARSS
LA English
DT Proceedings Paper
CT IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
CY JUL 21-26, 2013
CL Melbourne, AUSTRALIA
SP IEEE, Inst Elect & Elect Engineers, Geoscience & Remote Sensing Soc
DE Land Surface Temperature; NPP VIIRS; validation; ground-based LST;
   spatial heterogeneity
ID RADIATIVE-TRANSFER
AB Thermal infrared satellite observations of the Earth's surface are key components in estimating the surface skin temperature over global land areas. This work presents validation methodologies to estimate the quantitative uncertainty in Land Surface Temperature (LST) product derived from the Visible Infrared Imager Radiometer Suite (VIIRS) onboard Suomi National Polar-orbiting Partnership (NPP) using ground-based measurements currently made operationally at many field and weather stations around the world. Over heterogeneous surfaces in terms of surface types or biophysical properties (e.g., vegetation density, emissivity), the validation protocol accounts for land surface spatial variability around the ground station. Over sparse vegetation canopies, the methodology accounts for viewing directional effects and sun configuration when validating VIIRS LST products.
C1 [Guillevic, Pierre C.] North Carolina State Univ, CICS, 151 Patton Ave, Asheville, NC 28801 USA.
   [Guillevic, Pierre C.; Privette, Jeffrey L.] NOAA, Natl Climat Data Ctr, Asheville, NC 28801 USA.
   [Yu, Yunyue; Csiszar, Ivan] NOAA, Ctr Satellite Applicat & Res STAR, College Pk, MD 20740 USA.
   [Goettsche, Frank M.; Bork-Unkelbach, Annika] Karlsruhe Inst Technol, D-76021 Karlsruhe, Germany.
   [Hulley, Glynn; Hook, Simon] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
   [Olioso, Albert; Courault, Dominique] INRA, F-84914 Avignon, France.
   [Sobrino, Jose] Univ Valencia, Global Change Unit, Valencia, Spain.
   [Meyers, Tilden] NOAA, Atmospher Turbulence & Diffus Div, Oak Ridge, TN 37830 USA.
   [Ghent, Darren] Univ Leicester, Dept Phys & Astron, Leicester, Leics, England.
   [Roman, Miguel O.] NASA, Goddard Space Flight Ctr, Terr Informat Syst Branch, Greenbelt, MD USA.
RP Guillevic, PC (reprint author), North Carolina State Univ, CICS, 151 Patton Ave, Asheville, NC 28801 USA.
RI Gottsche, Frank-Michael/A-7362-2013; Meyers, Tilden/C-6633-2016; Yu,
   Yunyue/F-5636-2010; 
OI Gottsche, Frank-Michael/0000-0001-5836-5430; Olioso,
   Albert/0000-0001-8342-9272
FU Joint Polar Satellite System program; National Oceanic and Atmospheric
   Administration (NOAA)'s Climate Data Record project, through the
   Cooperative Institute for Climate and Satellites - North Carolina
   [NA09NES4400006]
FX This work was supported in part by the Joint Polar Satellite System
   program and by the National Oceanic and Atmospheric Administration
   (NOAA)'s Climate Data Record project, through the Cooperative Institute
   for Climate and Satellites - North Carolina under Cooperative Agreement
   NA09NES4400006. The MODIS data used in this study are distributed by the
   NASA's Earth Observing System Data and Information System (EOSDIS,
   http://earthdata.nasa.gov). The VIIRS data are distributed by the NASA
   Land Product Evaluation and Analysis Tool Element (PEATE).
NR 14
TC 0
Z9 0
U1 0
U2 6
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-6996
BN 978-1-4799-1114-1
J9 INT GEOSCI REMOTE SE
PY 2013
BP 640
EP 643
DI 10.1109/IGARSS.2013.6721238
PG 4
WC Engineering, Electrical & Electronic; Geosciences, Multidisciplinary;
   Remote Sensing
SC Engineering; Geology; Remote Sensing
GA BB7JO
UT WOS:000345638900156
ER

PT S
AU Lim, B
   Shearn, M
   Dawson, D
   Parashare, C
   Romero-Wolf, A
   Russell, D
   Steinkraus, J
AF Lim, Boon
   Shearn, Michael
   Dawson, Douglas
   Parashare, Chaitali
   Romero-Wolf, Andrew
   Russell, Damon
   Steinkraus, Joel
GP IEEE
TI DEVELOPMENT OF THE RADIOMETER ATMOSPHERIC CUBESAT EXPERIMENT PAYLOAD
SO 2013 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS)
SE IEEE International Symposium on Geoscience and Remote Sensing IGARSS
LA English
DT Proceedings Paper
CT IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
CY JUL 21-26, 2013
CL Melbourne, AUSTRALIA
SP IEEE, Inst Elect & Elect Engineers, Geoscience & Remote Sensing Soc
DE Microwave radiometry; Atmospheric measurements; Low earth orbit
   satellites; CubeSat; MMICs
AB The Jet Propulsion Laboratory (JPL) is developing the Radiometer Atmospheric CubeSat Experiment (RACE), which consists of a water vapor radiometer integrated on a 3 U CubeSat platform. RACE will measure 2 channels off the 183 GHz water vapor line, and will be used to validate new low noise amplifier technology and internal calibration methodology. RACE will advance the technology readiness level (TRL) of the 183 GHz receiver subsystem from TRL 4 to TRL 6 and a CubeSat 183 GHz radiometer system from TRL 4 to TRL 7.
C1 [Lim, Boon; Shearn, Michael; Dawson, Douglas; Parashare, Chaitali; Romero-Wolf, Andrew; Russell, Damon; Steinkraus, Joel] CALTECH, Jet Prop Lab, Pasadena, CA 91125 USA.
RP Lim, B (reprint author), CALTECH, Jet Prop Lab, Pasadena, CA 91125 USA.
NR 5
TC 0
Z9 0
U1 2
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-6996
BN 978-1-4799-1114-1
J9 INT GEOSCI REMOTE SE
PY 2013
BP 849
EP 851
DI 10.1109/IGARSS.2013.6721292
PG 3
WC Engineering, Electrical & Electronic; Geosciences, Multidisciplinary;
   Remote Sensing
SC Engineering; Geology; Remote Sensing
GA BB7JO
UT WOS:000345638900208
ER

PT S
AU Newell, D
   Figgins, D
   Draper, D
   Berdanier, B
   Kubitschek, M
   Sexton, A
   Krimchansky, S
AF Newell, David
   Figgins, Don
   Draper, David
   Berdanier, Barry
   Kubitschek, Michael
   Sexton, Adam
   Krimchansky, Sergey
GP IEEE
TI GPM MICROWAVE IMAGER KEY TECHNOLOGIES, PERFORMANCE AND CALIBRATION
   RESULTS
SO 2013 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS)
SE IEEE International Symposium on Geoscience and Remote Sensing IGARSS
LA English
DT Proceedings Paper
CT IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
CY JUL 21-26, 2013
CL Melbourne, AUSTRALIA
SP IEEE, Inst Elect & Elect Engineers, Geoscience & Remote Sensing Soc
DE Radiometer; GPM; GMI; microwave; calibration
AB The Global Precipitation Measurement (GPM) Microwave Imager (GMI) Instrument was built and tested by Ball Aerospace and Technologies Corporation (Ball) under a contract with the GPM program at NASA Goddard. The design is a light-weight and compact scanning microwave radiometer with a stowable main reflector. Because calibration is a key consideration for GMI, the design includes multiple features to enhance calibration accuracy including a dual calibration system. The dual calibration system uses noise diodes in addition to hot and cold targets to provide on-board computation of nonlinearity and detection of transient errors in the hot and cold targets. The results of the ground calibration testing are presented. The noise diodes are key to reducing ground calibration errors. In this paper we describe the instrument and present the measured performance of the GMI instrument. We describe the key technologies developed for the GMI instrument. The measured performance is presented along with trend data through spacecraft level testing. The results of the instrument calibration are also summarized.
C1 [Newell, David; Figgins, Don; Draper, David; Berdanier, Barry; Kubitschek, Michael; Sexton, Adam] Ball Aerosp & Technol Corp, Boulder, CO 80021 USA.
   [Krimchansky, Sergey] NASA, Goddard Space Flight Ctr, Washington, DC USA.
RP Newell, D (reprint author), Ball Aerosp & Technol Corp, Boulder, CO 80021 USA.
NR 4
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-6996
BN 978-1-4799-1114-1
J9 INT GEOSCI REMOTE SE
PY 2013
BP 1139
EP 1142
DI 10.1109/IGARSS.2013.6721366
PG 4
WC Engineering, Electrical & Electronic; Geosciences, Multidisciplinary;
   Remote Sensing
SC Engineering; Geology; Remote Sensing
GA BB7JO
UT WOS:000345638901067
ER

PT S
AU Jones, L
   Datta, S
   Santos-Garcia, A
   Wang, JR
   Payne, V
   Viltard, N
   Wilheit, T
AF Jones, Linwood
   Datta, Saswati
   Santos-Garcia, Andrea
   Wang, James R.
   Payne, Vivienne
   Viltard, Nicholas
   Wilheit, Thomas
GP IEEE
TI RADIOMETRIC INTERCALIBRATION OF THE MICROWAVE HUMIDITY SOUNDER ON
   NOAA-18, METOP-A, AND NOAA-19 USING SAPHIR ON MEGHA-TROPIQUES
SO 2013 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS)
SE IEEE International Symposium on Geoscience and Remote Sensing IGARSS
LA English
DT Proceedings Paper
CT IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
CY JUL 21-26, 2013
CL Melbourne, AUSTRALIA
SP IEEE, Inst Elect & Elect Engineers, Geoscience & Remote Sensing Soc
DE calibration; validation; sounder; SAPHIR; MHS MetOp-A; NOAA-18; NOAA-19
AB The purpose of this paper is to ascertain the use of SAPHIR (in a low earth orbit) for radiometric brightness temperature, Tb, intercalibration of sounder channel sensors (in near polar orbits) within the context of the Global Precipitation Measurement (GPM) mission [1]. For this purpose, we present results of the radiometric intercalibration based on the double differences technique between SAPHIR and the Microwave Humidity Sounder (MHS) on the MetoOp-A, NOAA-18 and NOAA-19 polar orbiting satellites. The analysis presented was reported at the last intercalibration meeting at Toulouse, France, and were performed by Texas A&M University (TAMU), Science Systems and Applications (SSA) and, Central Florida Remote Sensing Lab (CFRSL) at University of Central Florida.
C1 [Jones, Linwood; Santos-Garcia, Andrea] Univ Cent Florida, Cent Florida Remote Sensing Lab, Orlando, FL 32816 USA.
   [Datta, Saswati] Data & Image Proc Consultant, Morrisville, NY 27560 USA.
   [Wang, James R.] Sci Syst & Appl Inc, Lanham, MD 20706 USA.
   [Payne, Vivienne] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
   [Viltard, Nicholas] Univ Paris, Lab Atmospheres Milieux Observat Spatiales, Paris, France.
   [Wilheit, Thomas] Texas A&M Univ, Asheville, NC USA.
RP Jones, L (reprint author), Univ Cent Florida, Cent Florida Remote Sensing Lab, Orlando, FL 32816 USA.
EM Ljones5@cfl.rr.com
NR 10
TC 1
Z9 1
U1 0
U2 3
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-6996
BN 978-1-4799-1114-1
J9 INT GEOSCI REMOTE SE
PY 2013
BP 1151
EP 1154
DI 10.1109/IGARSS.2013.6721369
PG 4
WC Engineering, Electrical & Electronic; Geosciences, Multidisciplinary;
   Remote Sensing
SC Engineering; Geology; Remote Sensing
GA BB7JO
UT WOS:000345638901070
ER

PT S
AU Coen, CT
   Piepmeier, JR
   Cressler, JD
AF Coen, Christopher T.
   Piepmeier, Jeffrey R.
   Cressler, John D.
GP IEEE
TI INTEGRATED SILICON-GERMANIUM ELECTRONICS FOR CUBESAT-BASED RADIOMETERS
SO 2013 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS)
SE IEEE International Symposium on Geoscience and Remote Sensing IGARSS
LA English
DT Proceedings Paper
CT IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
CY JUL 21-26, 2013
CL Melbourne, AUSTRALIA
SP IEEE, Inst Elect & Elect Engineers, Geoscience & Remote Sensing Soc
DE Silicon germanium; radiometers; millimeter wave integrated circuits; low
   earth orbit satellites; space technology
AB This paper discusses the motivation for and accomplishments to date in our ongoing effort to develop an integrated G-band SiGe radiometer for use in large-scale production of remote sensing CubeSats. The constrained nature of these platforms necessitates the use of highly integrated, low-power electronics that are well-suited for large-scale production, assembly, and testing. The high speeds of emerging 4th-generation SiGe BiCMOS technologies makes these platforms realistic targets for >100 GHz applications for the first time. The high integration level, fabrication economy-of-scale, low 1/f noise, built-in total-dose radiation tolerance, and attractive thermal properties of these technologies make them ideal for this application. Ultra-low noise SiGe LNA designs which show the potential of these technologies for use in high-quality radiometers are presented. Future designs will increase integration levels, with the ultimate goal being a full radiometer-on-a-chip containing calibration sources.
C1 [Coen, Christopher T.; Cressler, John D.] Georgia Inst Technol, Sch Elect & Comp Engn, 85 5th St NW, Atlanta, GA 30308 USA.
   [Piepmeier, Jeffrey R.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
RP Coen, CT (reprint author), Georgia Inst Technol, Sch Elect & Comp Engn, 85 5th St NW, Atlanta, GA 30308 USA.
EM chris.coen@gatech.edu
FU NASA Office
FX This work is supported by a NASA Office of the Chief Technologists Space
   Technology Research Fellowship.
NR 15
TC 3
Z9 3
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-6996
BN 978-1-4799-1114-1
J9 INT GEOSCI REMOTE SE
PY 2013
BP 1286
EP 1289
DI 10.1109/IGARSS.2013.6723016
PG 4
WC Engineering, Electrical & Electronic; Geosciences, Multidisciplinary;
   Remote Sensing
SC Engineering; Geology; Remote Sensing
GA BB7JO
UT WOS:000345638901104
ER

PT S
AU Yueh, S
   Tang, WQ
   Fore, A
   Hayashi, JCA
   Lagerloef, G
   Jackson, T
   Bindlish, R
AF Yueh, Simon
   Tang, Wenqing
   Fore, Alexander
   Hayashi, Julian Chaubell Akiko
   Lagerloef, Gary
   Jackson, Thomas
   Bindlish, Rajat
GP IEEE
TI AQUARIUS SALINITY AND WIND RETRIEVAL USING THE CAP ALGORITHM AND
   APPLICATION TO WATER CYCLE OBSERVATION IN THE INDIAN OCEAN AND
   SUBCONTINENT
SO 2013 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS)
SE IEEE International Symposium on Geoscience and Remote Sensing IGARSS
LA English
DT Proceedings Paper
CT IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
CY JUL 21-26, 2013
CL Melbourne, AUSTRALIA
SP IEEE, Inst Elect & Elect Engineers, Geoscience & Remote Sensing Soc
C1 [Yueh, Simon; Tang, Wenqing; Fore, Alexander; Hayashi, Julian Chaubell Akiko; Jackson, Thomas] CALTECH, Jet Prop Lab, Pasadena, CA 91125 USA.
   [Lagerloef, Gary] Earth & Space Res, Seattle, WA 98121 USA.
   [Bindlish, Rajat] USDA ARS, Washington, DC 20250 USA.
RP Yueh, S (reprint author), CALTECH, Jet Prop Lab, Pasadena, CA 91125 USA.
FU National Aeronautics and Space Administration
FX The work described in this paper was carried out by the Jet Propulsion
   Laboratory, California Institute of Technology under a contract with the
   National Aeronautics and Space Administration. USDA is an equal
   opportunity provider and employer.
NR 3
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-6996
BN 978-1-4799-1114-1
J9 INT GEOSCI REMOTE SE
PY 2013
BP 1790
EP 1793
DI 10.1109/IGARSS.2013.6723146
PG 4
WC Engineering, Electrical & Electronic; Geosciences, Multidisciplinary;
   Remote Sensing
SC Engineering; Geology; Remote Sensing
GA BB7JO
UT WOS:000345638901227
ER

PT S
AU Zhou, YW
   Lang, RH
   Utku, C
   Le Vine, D
AF Zhou, Yiwen
   Lang, Roger H.
   Utku, Cuneyt
   Le Vine, David
GP IEEE
TI Seawater Permittivity Model Function with New L-band Seawater
   Measurements at 33psu
SO 2013 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS)
SE IEEE International Symposium on Geoscience and Remote Sensing IGARSS
LA English
DT Proceedings Paper
CT IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
CY JUL 21-26, 2013
CL Melbourne, AUSTRALIA
SP IEEE, Inst Elect & Elect Engineers, Geoscience & Remote Sensing Soc
DE seawater; permittivity; salinity; model function
ID DIELECTRIC-PROPERTIES; WATER; GHZ
AB Seawater salinity measurements are currently being made at L-band (1.413 Ghz) by NASA's Aquarius instrument (on the Aquarius/SAC-D observatory). The goal of Aquarius mission is to measure the salinity of seawater to an accuracy on the order of 0.2 psu; this requires a model function of seawater permittivity with a high accuracy. Since 2011, the George Washington University (GW) has employed a cavity technique to determine the complex permittivity of seawater at 1.413 GHz. In this paper, a new seawater dielectric model function is introduced including the latest permittivity data for seawater with salinity 33 psu. Finally, the validation of the end-effect, measurement variance and data fitting will be discussed.
C1 [Zhou, Yiwen; Lang, Roger H.] George Washington Univ, Dept Elect & Comp Engn, Washington, DC 20052 USA.
   [Utku, Cuneyt; Le Vine, David] NASA, Goddard Space Flight Ctr, Cryospher Sci Branch, Greenbelt, MD 20771 USA.
RP Zhou, YW (reprint author), George Washington Univ, Dept Elect & Comp Engn, Washington, DC 20052 USA.
NR 11
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-6996
BN 978-1-4799-1114-1
J9 INT GEOSCI REMOTE SE
PY 2013
BP 1794
EP 1797
DI 10.1109/IGARSS.2013.6723147
PG 4
WC Engineering, Electrical & Electronic; Geosciences, Multidisciplinary;
   Remote Sensing
SC Engineering; Geology; Remote Sensing
GA BB7JO
UT WOS:000345638901228
ER

PT S
AU Le Vine, DM
   de Manhaeis, P
   Ruf, C
   Chen, D
   Dinnat, EP
AF Le Vine, D. M.
   de Manhaeis, P.
   Ruf, C.
   Chen, D.
   Dinnat, E. P.
GP IEEE
TI AQUARIUS RFI DETECTION AND MITIGATION
SO 2013 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS)
SE IEEE International Symposium on Geoscience and Remote Sensing IGARSS
LA English
DT Proceedings Paper
CT IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
CY JUL 21-26, 2013
CL Melbourne, AUSTRALIA
SP IEEE, Inst Elect & Elect Engineers, Geoscience & Remote Sensing Soc
DE Radio Frequency Interference; L-band; Microwave Radiometry; Microwave
   Remote Sensing
ID L-BAND; SPACE
AB Aquarius is an L-band instrument designed to map sea surface salinity from space. Monitoring salinity from space is a particularly sensitive measurement and RFI is a concern, even in the protected band at 1.4 GHz where the Aquarius radiometers operate. To protect against RFI, the Aquarius radiometer samples rapidly and a glitch detection algorithm is employed to check each sample for RFI. This strategy has worked well over oceans, but there are large areas over land, especially in Asia and Europe, where contamination by RFI affects most samples.
C1 [Le Vine, D. M.; de Manhaeis, P.; Dinnat, E. P.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
   [Ruf, C.; Chen, D.] Univ Michigan, Ann Arbor, MI 48109 USA.
RP Le Vine, DM (reprint author), NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
RI Ruf, Christopher/I-9463-2012
NR 6
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-6996
BN 978-1-4799-1114-1
J9 INT GEOSCI REMOTE SE
PY 2013
BP 1798
EP 1800
DI 10.1109/IGARSS.2013.6723148
PG 3
WC Engineering, Electrical & Electronic; Geosciences, Multidisciplinary;
   Remote Sensing
SC Engineering; Geology; Remote Sensing
GA BB7JO
UT WOS:000345638901229
ER

PT S
AU Miller, TL
   James, MW
   Roberts, JB
   Biswas, SK
   Cecil, D
   Jones, WL
   Johnson, J
   Farrar, S
   Sahawneh, S
   Ruf, CS
   Morris, M
   Uhlhorn, EW
   Black, PG
AF Miller, Timothy L.
   James, M. W.
   Roberts, J. B.
   Biswas, S. K.
   Cecil, D.
   Jones, W. L.
   Johnson, J.
   Farrar, S.
   Sahawneh, S.
   Ruf, C. S.
   Morris, M.
   Uhlhorn, E. W.
   Black, P. G.
GP IEEE
TI THE HURRICANE IMAGING RADIOMETER: PRESENT AND FUTURE
SO 2013 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS)
SE IEEE International Symposium on Geoscience and Remote Sensing IGARSS
LA English
DT Proceedings Paper
CT IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
CY JUL 21-26, 2013
CL Melbourne, AUSTRALIA
SP IEEE, Inst Elect & Elect Engineers, Geoscience & Remote Sensing Soc
DE HIRAD; hurricane wind speed; imaging radiometer
AB The Hurricane Imaging Radiometer (HIRAD) is an airborne passive microwave radiometer designed to provide high resolution, wide swath imagery of surface wind speed in tropical cyclones from a low profile planar antenna with no mechanical scanning. Wind speed and rain rate images from HIRAD's first field campaign (GRIP, 2010) are presented here followed, by a discussion on the performance of the newly installed thermal control system during the 2012 HS3 campaign. The paper ends with a discussion on the next generation dual polarization HIRAD antenna (already designed) for a future system capable of measuring wind direction as well as wind speed.
C1 [Miller, Timothy L.; James, M. W.; Roberts, J. B.; Biswas, S. K.; Cecil, D.] NASA, MSFC, Earth Sci Off, Huntsville, AL 35805 USA.
   [Jones, W. L.; Johnson, J.; Farrar, S.; Sahawneh, S.] Univ Cent Florida, Dept EECS, Orlando, FL 32816 USA.
   [Ruf, C. S.; Morris, M.] Univ Michigan, AOSS Dept, Ann Arbor, MI 48109 USA.
   [Uhlhorn, E. W.] NOAA, Atlantic Oceanog & Meteorol Lab, Miami, FL 33149 USA.
   [Black, P. G.] SAIC Inc, Naval Res Lab, Monterey, CA 93940 USA.
RP Miller, TL (reprint author), NASA, MSFC, Earth Sci Off, Huntsville, AL 35805 USA.
RI Ruf, Christopher/I-9463-2012
NR 3
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-6996
BN 978-1-4799-1114-1
J9 INT GEOSCI REMOTE SE
PY 2013
BP 1897
EP 1899
DI 10.1109/IGARSS.2013.6723174
PG 3
WC Engineering, Electrical & Electronic; Geosciences, Multidisciplinary;
   Remote Sensing
SC Engineering; Geology; Remote Sensing
GA BB7JO
UT WOS:000345638901255
ER

PT S
AU Gaier, T
   Tanner, A
   Kangaslahti, P
   Lim, B
AF Gaier, Todd
   Tanner, Alan
   Kangaslahti, Pekka
   Lim, Boon
GP IEEE
TI THE CORRELATION RADIOMETER- A NEW APPLICATION IN MM-WAVE TOTAL POWER
   RADIOMETRY
SO 2013 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS)
SE IEEE International Symposium on Geoscience and Remote Sensing IGARSS
LA English
DT Proceedings Paper
CT IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
CY JUL 21-26, 2013
CL Melbourne, AUSTRALIA
SP IEEE, Inst Elect & Elect Engineers, Geoscience & Remote Sensing Soc
DE Microwave radiometry; MMICs
AB We describe the design and performance of a 180 GHz correlation radiometer suitable for remote sensing. The radiometer provides continuous comparisons between a the observed signal and a reference load to provide stable radiometric baselines. The radiometer was assembled and tested using parts from the GeoSTAR-II instrument and is fully compatible with operation in a synthetic aperture radiometer or as a standalone technology for use in microwave sounding and imaging. This new radiometer was tested over several days easily demonstrating the required 6 hour stability requirement for observations of mean brightness temperature for a geostationary instrument.
C1 [Gaier, Todd; Tanner, Alan; Kangaslahti, Pekka; Lim, Boon] CALTECH, Jet Prop Lab, Pasadena, CA 91125 USA.
RP Gaier, T (reprint author), CALTECH, Jet Prop Lab, Pasadena, CA 91125 USA.
NR 7
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-6996
BN 978-1-4799-1114-1
J9 INT GEOSCI REMOTE SE
PY 2013
BP 1924
EP 1926
DI 10.1109/IGARSS.2013.6723181
PG 3
WC Engineering, Electrical & Electronic; Geosciences, Multidisciplinary;
   Remote Sensing
SC Engineering; Geology; Remote Sensing
GA BB7JO
UT WOS:000345638902006
ER

PT S
AU Leslie, RV
   Blackwell, WJ
   Anderson, K
   Kim, E
   Weng, F
AF Leslie, R. V.
   Blackwell, W. J.
   Anderson, K.
   Kim, E.
   Weng, F.
GP IEEE
TI S-NPP ADVANCED TECHNOLOGY MICROWAVE SOUNDER: REFLECTOR EMISSIVITY MODEL,
   MITIGATION, & VERIFICATION
SO 2013 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS)
SE IEEE International Symposium on Geoscience and Remote Sensing IGARSS
LA English
DT Proceedings Paper
CT IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
CY JUL 21-26, 2013
CL Melbourne, AUSTRALIA
SP IEEE, Inst Elect & Elect Engineers, Geoscience & Remote Sensing Soc
DE ATMS; microwave; radiometer; calibration
AB The Suomi NPP spacecraft pitchover maneuver revealed an ATMS scan angle-dependent bias when viewing deep space, which is a homogenous and unpolarized source that fills the entire ATMS Field of Regard. Reflector emissivity was investigated as a possible root cause. The emissivity is polarization dependent, which results in a scan-dependent bias with the quasi-vertical channels having a different bias shape than the quasi-horizontal channels. The normal emissivity was empirically estimated by minimizing the scan bias during the pitchover maneuver, and the reflector's temperature was derived from ATMS telemetry. The model, calibration change, and estimated normal emissivity were verified using the ATMS thermal vacuum test data. Reflector emissitivies from approximately 0.2% to 0.4% were derived, resulting in brightness temperature corrections of up to 0.5 K.
C1 [Leslie, R. V.; Blackwell, W. J.] MIT, Lincoln Lab, 244 Wood St, Lexington, MA 02420 USA.
   [Anderson, K.] Northrop Grumman Elect Syst, Azusa, CA 91702 USA.
   [Kim, E.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
   [Weng, F.] NOAA, NESDIS STAR, College Pk, MD 20740 USA.
RP Leslie, RV (reprint author), MIT, Lincoln Lab, 244 Wood St, Lexington, MA 02420 USA.
EM wjb@LL.MIT.EDU
FU National Oceanic and Atmospheric Administration [FA8721-05-C-0002]
FX This work was sponsored by the National Oceanic and Atmospheric
   Administration under Air Force contract FA8721-05-C-0002. Opinions,
   interpretations, conclusions, and recommendations are those of the
   authors and not necessarily endorsed by the United States Government.
NR 4
TC 0
Z9 0
U1 1
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-6996
BN 978-1-4799-1114-1
J9 INT GEOSCI REMOTE SE
PY 2013
BP 1927
EP 1929
DI 10.1109/IGARSS.2013.6723182
PG 3
WC Engineering, Electrical & Electronic; Geosciences, Multidisciplinary;
   Remote Sensing
SC Engineering; Geology; Remote Sensing
GA BB7JO
UT WOS:000345638902007
ER

PT S
AU Salinas, SV
   Chew, BN
   Muller, A
   Holben, BN
   Liew, SC
AF Salinas, Santo V.
   Chew, Boon N.
   Mueller, Astrid
   Holben, Brent N.
   Liew, Soo C.
GP IEEE
TI FIRST RESULTS FROM AERONET MINI-DRAGON PHOTOMETER NETWORK SET-UP AT
   SINGAPORE
SO 2013 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS)
SE IEEE International Symposium on Geoscience and Remote Sensing IGARSS
LA English
DT Proceedings Paper
CT IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
CY JUL 21-26, 2013
CL Melbourne, AUSTRALIA
SP IEEE, Inst Elect & Elect Engineers, Geoscience & Remote Sensing Soc
DE Aerosols; photometry; biomass burning; South East Asia
AB We report our first photometric measurements of aerosol optical depth from AERONET's mini-DRAGON sites at Singapore performed over the months of August and September 2012. Multi-spectral measurements of aerosol optical depth provide essential spectral information to obtain and/or retrieve the so-called Angstrom exponent number which is an essential parameter for inferring aerosol particle size regime. Based on the range of variability of Angstrom exponent number and aerosol optical depth, various aerosol types present in the local environment, can be identified. Special emphasis is placed on detecting the possible presence of external sources of aerosols such as from trans-boundary smoke originating from regional biomass burning episodes which is prevalent during this time of the year.
C1 [Salinas, Santo V.; Chew, Boon N.; Mueller, Astrid; Liew, Soo C.] Natl Univ Singapore, CRISP, Block S17,Level 2,10 Lower Kent Ridge Rd, Singapore 119260, Singapore.
   [Holben, Brent N.] NASA, Goddard Space Flight Ctr, Aerosol Robot Network, Greenbelt, MD 20771 USA.
RP Salinas, SV (reprint author), Natl Univ Singapore, CRISP, Block S17,Level 2,10 Lower Kent Ridge Rd, Singapore 119260, Singapore.
EM crsscsv@nus.edu.sg
RI Liew, Soo Chin/C-9187-2011
OI Liew, Soo Chin/0000-0001-8342-4682
FU Agency for Science, Technology & Research (A*STAR) of Singapore
FX The authors would like to thank AERONET processing and archiving the Sun
   photometer data. CRISP would like to thank the Agency for Science,
   Technology & Research (A*STAR) of Singapore for financial support.
NR 4
TC 0
Z9 0
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-6996
BN 978-1-4799-1114-1
J9 INT GEOSCI REMOTE SE
PY 2013
BP 2238
EP 2241
DI 10.1109/IGARSS.2013.6723262
PG 4
WC Engineering, Electrical & Electronic; Geosciences, Multidisciplinary;
   Remote Sensing
SC Engineering; Geology; Remote Sensing
GA BB7JO
UT WOS:000345638902086
ER

PT S
AU Rosen, P
   Kim, Y
   Eisen, H
   Shaffer, S
   Veilleux, L
   Hensley, S
   Chakraborty, M
   Misra, T
   Satish, R
   Putrevu, D
   Bhan, R
AF Rosen, P.
   Kim, Y.
   Eisen, H.
   Shaffer, S.
   Veilleux, L.
   Hensley, S.
   Chakraborty, M.
   Misra, T.
   Satish, R.
   Putrevu, D.
   Bhan, R.
GP IEEE
TI A DUAL-FREQUENCY SPACEBORNE SAR MISSION CONCEPT
SO 2013 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS)
SE IEEE International Symposium on Geoscience and Remote Sensing IGARSS
LA English
DT Proceedings Paper
CT IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
CY JUL 21-26, 2013
CL Melbourne, AUSTRALIA
SP IEEE, Inst Elect & Elect Engineers, Geoscience & Remote Sensing Soc
C1 [Rosen, P.; Kim, Y.; Eisen, H.; Shaffer, S.; Veilleux, L.; Hensley, S.] CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
   [Chakraborty, M.; Misra, T.; Satish, R.; Putrevu, D.; Bhan, R.] ISRO, Ctr Space Applicat, Ahmadabad 380015, Gujarat, India.
   [Satish, R.] ISRO, ISRO Satelite Ctr, Bangalore 560017, Karnataka, India.
RP Rosen, P (reprint author), CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
FU National Aeronautics and Space Administration
FX The authors thank theSDT for their contributions to establishing the
   science requirements for this concept.This work was performed at the Jet
   Propulsion Laboratory, California Institute of Technology, under
   contract with the National Aeronautics and Space Administration.
NR 4
TC 2
Z9 2
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-6996
BN 978-1-4799-1114-1
J9 INT GEOSCI REMOTE SE
PY 2013
BP 2293
EP 2296
DI 10.1109/IGARSS.2013.6723276
PG 4
WC Engineering, Electrical & Electronic; Geosciences, Multidisciplinary;
   Remote Sensing
SC Engineering; Geology; Remote Sensing
GA BB7JO
UT WOS:000345638902100
ER

PT S
AU Sun, GQ
   Ni, WJ
   Hall, F
   Masek, J
   Fatoyinbo, T
   Peddle, D
AF Sun, Guoqing
   Ni, Wenjian
   Hall, Forrest
   Masek, Jeffrey
   Fatoyinbo, Temilola
   Peddle, Derek
GP IEEE
TI RETRIEVAL OF FOREST BIOPHYSICAL PARAMETERS USING PHYSICALLY-BASED
   ALGORITHMS
SO 2013 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS)
SE IEEE International Symposium on Geoscience and Remote Sensing IGARSS
LA English
DT Proceedings Paper
CT IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
CY JUL 21-26, 2013
CL Melbourne, AUSTRALIA
SP IEEE, Inst Elect & Elect Engineers, Geoscience & Remote Sensing Soc
DE RT model; Look-up table; forest biomass; LANDSAT; SAR
ID BIDIRECTIONAL REFLECTANCE; MODEL; CANOPIES
AB Radiative transfer (RT) models provide an improved theoretical and physical basis for deriving biophysical structural information compared with statistically-based empirical methods. It has been used in various studies, mainly in optical remote sensing applications. This study is to explore the potential of applying the physically-based approach to multi-sensor data in forest parameters estimation. Optical reflectance model and radar backscatter models were used to create a look up table by simulation of multi-spectral reflectance at LANDSAT bands and radar backscattering coefficients and the height of scattering phase center in L-band from the forest stands generated by a forest growth model. As a first step, a simulated data set was used to test the look up table method. The results showed that optical reflectance, radar backscatter and interferometric SAR signature have their own advantage in deriving different parameters, and combined use of these data improved the estimation results. In next step of our study, real data, such as LANDSAT data, ALOS PALSAR data will be used in look-up table inversion. The field measurements and parameters derived from lidar data will be used for assessing the accuracy of the forest biophysical parameters from the physically-based algorithms.
C1 [Sun, Guoqing; Ni, Wenjian] Univ Maryland, Dept Geog Sci, College Pk, MD 20742 USA.
   [Hall, Forrest; Peddle, Derek] Univ Maryland Baltimore Cty, Baltimore, MD 21250 USA.
   [Masek, Jeffrey; Fatoyinbo, Temilola] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
RP Sun, GQ (reprint author), Univ Maryland, Dept Geog Sci, College Pk, MD 20742 USA.
EM Guoqing.Sun@nasa.gov
RI Fatoyinbo, Temilola/G-6104-2012
OI Fatoyinbo, Temilola/0000-0002-1130-6748
FU NASA; National Basic Research Program of China [2013CB733404]
FX This work was supported by the Science of Terra and Aqua Program of
   NASA, and partially by the National Basic Research Program of China
   (Grant No. 2013CB733404).
NR 10
TC 0
Z9 0
U1 1
U2 4
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-6996
BN 978-1-4799-1114-1
J9 INT GEOSCI REMOTE SE
PY 2013
BP 2621
EP 2624
DI 10.1109/IGARSS.2013.6723360
PG 4
WC Engineering, Electrical & Electronic; Geosciences, Multidisciplinary;
   Remote Sensing
SC Engineering; Geology; Remote Sensing
GA BB7JO
UT WOS:000345638902181
ER

PT S
AU Yin, T
   Gastellu-Etchegorry, JP
   Grau, E
   Lauret, N
   Rubio, J
AF Yin, T.
   Gastellu-Etchegorry, J. P.
   Grau, E.
   Lauret, N.
   Rubio, J.
GP IEEE
TI SIMULATING SATELLITE WAVEFORM LIDAR WITH DART MODEL
SO 2013 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS)
SE IEEE International Symposium on Geoscience and Remote Sensing IGARSS
LA English
DT Proceedings Paper
CT IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
CY JUL 21-26, 2013
CL Melbourne, AUSTRALIA
SP IEEE, Inst Elect & Elect Engineers, Geoscience & Remote Sensing Soc
DE DART; Lidar; model; Monte Carlo
ID CANOPIES; RETURNS
AB DART model was extended for simulating satellite Lidar data of 3D Earth scenes with Monte Carlo based methods. 2 major modeling methods were developed. (1) Monte Carlo method for efficiently handling complex phase functions: once scattering directions with close occurrence probabilities are grouped within classes, a 1st random pulling gives the class of scattering directions, and a 2nd random pulling gives the scattering direction within the class. (2) A so-called RayCarlo method combines the classical Monte Carlo forward photon tracing method and the flux tracking method, which allows one to decrease computer time of classical Monte Carlo method by factors that can reach 10(8). Simulation results are very encouraging. Validation tests are being conducted.
C1 [Yin, T.; Gastellu-Etchegorry, J. P.; Grau, E.; Lauret, N.] Univ Toulouse, IRD, CNRS UMR 5126, CESBIO CNES, Toulouse, France.
   [Rubio, J.] Univ Maryland Baltimore Cty, NASA, GSFC, Dept Geography, Baltimore, MD 21228 USA.
RP Yin, T (reprint author), Univ Toulouse, IRD, CNRS UMR 5126, CESBIO CNES, Toulouse, France.
EM JEAN-PHILIPPE.GASTELLU@CESBIO.CNES.FR
OI Grau, Eloi/0000-0001-5757-7239
FU Paul Sabatier University; French Space Center (CNES)
FX Authors thank Paul Sabatier University and French Space Center (CNES)
   for their support.
NR 16
TC 4
Z9 4
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-6996
BN 978-1-4799-1114-1
J9 INT GEOSCI REMOTE SE
PY 2013
BP 3029
EP 3032
DI 10.1109/IGARSS.2013.6723464
PG 4
WC Engineering, Electrical & Electronic; Geosciences, Multidisciplinary;
   Remote Sensing
SC Engineering; Geology; Remote Sensing
GA BB7JO
UT WOS:000345638903025
ER

PT S
AU Lim, B
   Mahoney, M
   Haggerty, J
   Denning, R
AF Lim, Boon
   Mahoney, Michael
   Haggerty, Julie
   Denning, Richard
GP IEEE
TI THE MICROWAVE TEMPERATURE PROFILER PERFORMANCE IN RECENT AIRBORNE
   CAMPAIGNS
SO 2013 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS)
SE IEEE International Symposium on Geoscience and Remote Sensing IGARSS
LA English
DT Proceedings Paper
CT IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
CY JUL 21-26, 2013
CL Melbourne, AUSTRALIA
SP IEEE, Inst Elect & Elect Engineers, Geoscience & Remote Sensing Soc
DE Microwave radiometry; Atmospheric measurements; Airborne instruments
AB The JPL developed Microwave Temperature Profiler (MTP) has recently participated in GloPac, HIPPO (I to V) and TORERO, and the ongoing ATTREX campaigns. The MTP is now capable of supporting the NASA Global Hawk and a new canister version supports the NCAR G-V. The primary product from the MTP is remote measurements of the atmospheric temperature at, above and below the flight path, providing for the vertical state of the atmosphere. The NCAR-MTP has demonstrated unprecedented instrument performance and calibration with +/- 0.2 K flight level temperature error. Derived products include curtain plots, isentropes, lapse rate, cold point height and tropopause height.
C1 [Lim, Boon; Mahoney, Michael; Denning, Richard] CALTECH, Jet Prop Lab, Pasadena, CA 91125 USA.
   [Haggerty, Julie] Natl Ctr Atmospher Res, Boulder, CO 80305 USA.
RP Lim, B (reprint author), CALTECH, Jet Prop Lab, Pasadena, CA 91125 USA.
FU Upper Atmospheric Composition Observations (UACO); National Science
   Foundation
FX The research was carried out at the Jet Propulsion Laboratory,
   California Institute of Technology, under a contract with the National
   Aeronautics and Space Administration. MTP is primarily supported by the
   Upper Atmospheric Composition Observations (UACO) program. NCAR is
   sponsored by the National Science Foundation. The authors thank Brad
   Piece (NOAA NESDIS) for the model ozone field and Ru-Shan Gao (NOAA
   ESRL) for the ozone in situ measurements.
NR 5
TC 1
Z9 1
U1 1
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-6996
BN 978-1-4799-1114-1
J9 INT GEOSCI REMOTE SE
PY 2013
BP 3363
EP 3366
DI 10.1109/IGARSS.2013.6723549
PG 4
WC Engineering, Electrical & Electronic; Geosciences, Multidisciplinary;
   Remote Sensing
SC Engineering; Geology; Remote Sensing
GA BB7JO
UT WOS:000345638903109
ER

PT S
AU Rott, H
   Cline, DW
   Duguay, C
   Essery, R
   Etchevers, P
   Hajnsek, I
   Kern, M
   Macelloni, G
   Malnes, E
   Pulliainen, J
   Yueh, SH
AF Rott, Helmut
   Cline, Donald W.
   Duguay, Claude
   Essery, Richard
   Etchevers, Pierre
   Hajnsek, Irena
   Kern, Michael
   Macelloni, Giovanni
   Malnes, Eirik
   Pulliainen, Jouni
   Yueh, Simon H.
GP IEEE
TI COREH2O: High-Resolution X/Ku-Band Radar Imaging of Cold Land Processes
SO 2013 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS)
SE IEEE International Symposium on Geoscience and Remote Sensing IGARSS
LA English
DT Proceedings Paper
CT IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
CY JUL 21-26, 2013
CL Melbourne, AUSTRALIA
SP IEEE, Inst Elect & Elect Engineers, Geoscience & Remote Sensing Soc
C1 [Rott, Helmut] Univ Innsbruck, Inst Meteorol & Geophys, A-6020 Innsbruck, Austria.
   [Cline, Donald W.] NOAA, NWS, Hydrol Lab, Silver Spring, MD 20910 USA.
   [Duguay, Claude] Univ Waterloo, Waterloo, ON N2L 3G1, Canada.
   [Essery, Richard] Univ Edinburgh, Edinburgh EH8 9YL, Midlothian, Scotland.
   [Etchevers, Pierre] Meteo France, St Martin Dheres, France.
   [Hajnsek, Irena] ETH, Zurich, Switzerland.
   [Hajnsek, Irena] DLR HR, Cologne, Germany.
   [Kern, Michael] ESA, Estec, Noordwijk, Netherlands.
   [Macelloni, Giovanni] CNR, IFAC, Florence, Italy.
   [Malnes, Eirik] Norut, Tromso, Norway.
   [Pulliainen, Jouni] FMI, Helsinki, Finland.
   [Yueh, Simon H.] CALTECH, Jet Prop Lab, Pasadena, CA 91125 USA.
RP Rott, H (reprint author), Univ Innsbruck, Inst Meteorol & Geophys, A-6020 Innsbruck, Austria.
RI Macelloni, Giovanni /B-7518-2015; 
OI Essery, Richard/0000-0003-1756-9095
FU European Space Agency ESTEC [22830109/NL/JC, 22671109/NL/JA.]
FX The investigations were supported by the European Space Agency, ESTEC
   Contracts No. 22830109/NL/JC and No. 22671109/NL/JA.
NR 2
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-6996
BN 978-1-4799-1114-1
J9 INT GEOSCI REMOTE SE
PY 2013
BP 3479
EP 3482
DI 10.1109/IGARSS.2013.6723578
PG 4
WC Engineering, Electrical & Electronic; Geosciences, Multidisciplinary;
   Remote Sensing
SC Engineering; Geology; Remote Sensing
GA BB7JO
UT WOS:000345638903138
ER

PT S
AU Heggy, E
   Rosen, PA
   Beatty, R
   Freeman, T
   Gim, Y
AF Heggy, Essam
   Rosen, Paul A.
   Beatty, Richard
   Freeman, Tony
   Gim, Young
CA OASIS Team
GP IEEE
TI ORBITING ARID SUBSURFACE AND ICE SHEET SOUNDER (OASIS): EXPLORING DESERT
   AQUIFERS AND POLAR ICE SHEETS AND THEIR ROLE IN CURRENT AND
   PALEO-CLIMATE EVOLUTION
SO 2013 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS)
SE IEEE International Symposium on Geoscience and Remote Sensing IGARSS
LA English
DT Proceedings Paper
CT IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
CY JUL 21-26, 2013
CL Melbourne, AUSTRALIA
SP IEEE, Inst Elect & Elect Engineers, Geoscience & Remote Sensing Soc
C1 [Heggy, Essam; Rosen, Paul A.; Beatty, Richard; Freeman, Tony; Gim, Young; OASIS Team] CALTECH, Jet Prop Lab, Pasadena, CA 91125 USA.
RP Rosen, PA (reprint author), CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91125 USA.
NR 6
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-6996
BN 978-1-4799-1114-1
J9 INT GEOSCI REMOTE SE
PY 2013
BP 3483
EP 3486
DI 10.1109/IGARSS.2013.6723579
PG 4
WC Engineering, Electrical & Electronic; Geosciences, Multidisciplinary;
   Remote Sensing
SC Engineering; Geology; Remote Sensing
GA BB7JO
UT WOS:000345638903139
ER

PT S
AU Bruzzone, L
   Plaut, JJ
   Alberti, G
   Blankenship, DD
   Bovolo, F
   Campbell, BA
   Ferro, A
   Gim, Y
   Kofman, W
   Komatsu, G
   McKinnon, W
   Mitri, G
   Orosei, R
   Patterson, GW
   Plettemeier, D
   Seu, R
AF Bruzzone, L.
   Plaut, J. J.
   Alberti, G.
   Blankenship, D. D.
   Bovolo, F.
   Campbell, B. A.
   Ferro, A.
   Gim, Y.
   Kofman, W.
   Komatsu, G.
   McKinnon, W.
   Mitri, G.
   Orosei, R.
   Patterson, G. W.
   Plettemeier, D.
   Seu, R.
GP IEEE
TI RIME: RADAR FOR ICY MOON EXPLORATION
SO 2013 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS)
SE IEEE International Symposium on Geoscience and Remote Sensing IGARSS
LA English
DT Proceedings Paper
CT IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
CY JUL 21-26, 2013
CL Melbourne, AUSTRALIA
SP IEEE, Inst Elect & Elect Engineers, Geoscience & Remote Sensing Soc
DE radar sounder; icy moons; Jovian system; subsurface geology; geophysics;
   planetary exploration
ID SUBSURFACE
AB This paper presents the Radar for Icy Moons Exploration (RIME) instrument, which has been selected as payload for the JUpiter Icy moons Explorer (JUICE) mission. JUICE is the first Large-class mission chosen as part of the ESA's Cosmic Vision 2015-2025 programme, and is aimed to study Jupiter and to investigate the potentially habitable zones in the Galilean icy satellites. RIME is a radar sounder optimized for the penetration of Ganymede, Europa and Callisto up to a depth of 9 km in order to allow the study of the subsurface geology and geophysics of the icy moons and detect possible subsurface water. In this paper we present the main science goals of RIME, the main technical challenges for its development and for its operations, as well as the expected scientific returns.
C1 [Bruzzone, L.; Bovolo, F.; Ferro, A.] Univ Trento, Remote Sensing Lab, DISI, Trento, Italy.
   [Plaut, J. J.; Gim, Y.] CALTECH, JPL, Pasadena, CA USA.
   [Alberti, G.] CORISTA, Naples, Italy.
   [Blankenship, D. D.] Univ Texas Austin, Inst Geophys, Austin, TX USA.
   [Campbell, B. A.] Smithsonian Inst, Ctr Earth & Planetary Studies, Washington, DC USA.
   [Kofman, W.] UJF, CNRS, France & Space Res Ctr PAS, IPAG, Warsaw, Poland.
   [Komatsu, G.] Univ Annunzio, IRSPS, Pescara, Italy.
   [McKinnon, W.] Washington Univ, St Louis, MO 63130 USA.
   [Mitri, G.; Orosei, R.] INAF, IAPS, Rome, Italy.
   [Patterson, G. W.] Johns Hopkins Univ, APL, Laurel, MD USA.
   [Plettemeier, D.] Tech Univ Dresden, Dresden, Germany.
   [Seu, R.] Univ Roma La Sapienza, Rome, Italy.
RP Bruzzone, L (reprint author), Univ Trento, Remote Sensing Lab, DISI, Trento, Italy.
EM lorenzo.bruzzone@ing.unitn.it
RI Patterson, Gerald/E-7699-2015; Kofman, Wlodek/C-4556-2008; Komatsu,
   Goro/I-7822-2012; 
OI Komatsu, Goro/0000-0003-4155-108X; Bovolo,
   Francesca/0000-0003-3104-7656; Bruzzone, Lorenzo/0000-0002-6036-459X;
   Ferro, Adamo/0000-0002-7092-0318
NR 6
TC 7
Z9 7
U1 0
U2 5
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-6996
BN 978-1-4799-1114-1
J9 INT GEOSCI REMOTE SE
PY 2013
BP 3907
EP 3910
DI 10.1109/IGARSS.2013.6723686
PG 4
WC Engineering, Electrical & Electronic; Geosciences, Multidisciplinary;
   Remote Sensing
SC Engineering; Geology; Remote Sensing
GA BB7JO
UT WOS:000345638903244
ER

PT S
AU Zwieback, S
   Hajnsek, I
   Hensley, S
AF Zwieback, Simon
   Hajnsek, Irena
   Hensley, Scott
GP IEEE
TI OBSERVATIONAL ANALYSIS OF SOIL MOISTURE EFFECTS ON DINSAR SIGNALS
SO 2013 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS)
SE IEEE International Symposium on Geoscience and Remote Sensing IGARSS
LA English
DT Proceedings Paper
CT IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
CY JUL 21-26, 2013
CL Melbourne, AUSTRALIA
SP IEEE, Inst Elect & Elect Engineers, Geoscience & Remote Sensing Soc
DE DInSAR; soil moisture; deformation; polarimetry
AB Different mechanisms for the impact of soil moisture on interferometric radar data have been proposed, but its magnitude, sign and even presence have barely been studied empirically and thus remain poorly understood. In this study the dependence of the phase and coherence magnitude on soil moisture was inferred empirically with regression techniques: this was done for two airborne data sets at L band. The phase dependence was significant (alpha = 0.05) for more than 70% of the fields at HH polarization, its sign corresponding to an increase in optical path upon wetting. This trend was similar in both campaigns, whereas the prevalence of soil moisture-related decorrelation differs. These results are only consistent with a dielectric origin of the soil moisture effects, and not with soil swelling or the penetration depth hypothesis.
C1 [Zwieback, Simon; Hajnsek, Irena] ETH, Inst Environm Engn, Zurich, Switzerland.
   [Hajnsek, Irena] German Aerosp Ctr, Microwave & Radar Inst, Cologne, Germany.
   [Hensley, Scott] Jet Prop Lab, Radar Sci & Engn, Pasadena, CA 91109 USA.
RP Zwieback, S (reprint author), ETH, Inst Environm Engn, Zurich, Switzerland.
OI Zwieback, Simon/0000-0002-1398-6046
NR 10
TC 1
Z9 1
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-6996
BN 978-1-4799-1114-1
J9 INT GEOSCI REMOTE SE
PY 2013
BP 4046
EP 4049
DI 10.1109/IGARSS.2013.6723721
PG 4
WC Engineering, Electrical & Electronic; Geosciences, Multidisciplinary;
   Remote Sensing
SC Engineering; Geology; Remote Sensing
GA BB7JO
UT WOS:000345638904025
ER

PT S
AU Xiong, X
   BrianWenny
   Angal, A
   Sun, JQ
   Salomonson, V
   Barnes, W
AF Xiong, Xiaoxiong (Jack)
   BrianWenny
   Angal, Amit
   Sun, Junqiang
   Salomonson, Vincent
   Barnes, William
GP IEEE
TI Status of MODIS Instrument and Radiometric Calibration
SO 2013 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS)
SE IEEE International Symposium on Geoscience and Remote Sensing IGARSS
LA English
DT Proceedings Paper
CT IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
CY JUL 21-26, 2013
CL Melbourne, AUSTRALIA
SP IEEE, Inst Elect & Elect Engineers, Geoscience & Remote Sensing Soc
DE MODIS; Terra; Aqua; Calibration
AB Since launch, Terra and Aqua MODIS have successfully operated for more than 13 and 11 years, respectively. MODIS observations, made in 36 spectral bands covering wavelengths from visible to long-wave infrared, have enabled a broad range of science and research activities and made significant contributions to the earth remote sensing applications. MODIS on-orbit calibration is performed by a set of on-board calibrators (OBC). In addition, lunar observations are made regularly to monitor sensor radiometric calibration stability. This paper provides an overview of the Terra and Aqua MODIS instrument operation and calibration activities, and summarizes their radiometric calibration performance. Also discussed in this paper are the latest changes made in MODIS L1B collection 6 (C6), remaining challenging issues, and future calibration effort.
C1 [Xiong, Xiaoxiong (Jack)] NASA, GSFC, Sci & Explorat Directorate, Greenbelt, MD 20771 USA.
   [BrianWenny; Sun, Junqiang] Sigma Space Corp, Lanham, MD 20706 USA.
   [Angal, Amit] Sci Syst & Appl Inc, Lanham, MD 20706 USA.
   [Salomonson, Vincent] Univ Utah, Salt Lake City, UT 84112 USA.
   [Barnes, William] Univ Maryland Baltimore Cty, Baltimore, MD 21228 USA.
RP Xiong, X (reprint author), NASA, GSFC, Sci & Explorat Directorate, Greenbelt, MD 20771 USA.
NR 4
TC 1
Z9 1
U1 0
U2 3
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-6996
BN 978-1-4799-1114-1
J9 INT GEOSCI REMOTE SE
PY 2013
BP 4419
EP 4422
DI 10.1109/IGARSS.2013.6723815
PG 4
WC Engineering, Electrical & Electronic; Geosciences, Multidisciplinary;
   Remote Sensing
SC Engineering; Geology; Remote Sensing
GA BB7JO
UT WOS:000345638904117
ER

PT S
AU Fjortoft, R
   Callahan, P
   Rodriguez, E
   Desroches, D
AF Fjortoft, Roger
   Callahan, Phil
   Rodriguez, Ernesto
   Desroches, Damien
GP IEEE
TI PROCESSING OF PROPOSED KARIN/SWOT DATA
SO 2013 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS)
SE IEEE International Symposium on Geoscience and Remote Sensing IGARSS
LA English
DT Proceedings Paper
CT IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
CY JUL 21-26, 2013
CL Melbourne, AUSTRALIA
SP IEEE, Inst Elect & Elect Engineers, Geoscience & Remote Sensing Soc
DE Altimetry; hydrology; interferometry; oceanography; synthetic aperture
   radar
AB This article summarizes the data processing of the proposed wide-swath altimetry mission Surface Water and Ocean Topography (SWOT), and more specifically the processing steps up to level 2 for the Ka-band Radar Interferometer (KaRIn), which is a near-nadir viewing bistatic SAR system. A general overview of the proposed processing chains and data products is given, and some particularly challenging processing steps are commented on.
C1 [Fjortoft, Roger; Desroches, Damien] CNES, Toulouse, France.
   [Callahan, Phil; Rodriguez, Ernesto] CALTECH, Jet Prop Lab, Pasadena, CA 91125 USA.
RP Fjortoft, R (reprint author), CNES, Toulouse, France.
NR 7
TC 0
Z9 0
U1 0
U2 4
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-6996
BN 978-1-4799-1114-1
J9 INT GEOSCI REMOTE SE
PY 2013
BP 4515
EP 4518
DI 10.1109/IGARSS.2013.6723839
PG 4
WC Engineering, Electrical & Electronic; Geosciences, Multidisciplinary;
   Remote Sensing
SC Engineering; Geology; Remote Sensing
GA BB7JO
UT WOS:000345638904140
ER

PT S
AU Gastellu-Etchegorry, JP
   Yin, T
   Grau, E
   Lauret, N
   Rubio, J
AF Gastellu-Etchegorry, J. P.
   Yin, T.
   Grau, E.
   Lauret, N.
   Rubio, J.
GP IEEE
TI LIDAR RADIATIVE TRANSFER MODELING IN THE ATMOSPHERE
SO 2013 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS)
SE IEEE International Symposium on Geoscience and Remote Sensing IGARSS
LA English
DT Proceedings Paper
CT IEEE International Geoscience and Remote Sensing Symposium (IGARSS)
CY JUL 21-26, 2013
CL Melbourne, AUSTRALIA
SP IEEE, Inst Elect & Elect Engineers, Geoscience & Remote Sensing Soc
DE DART; Lidar; model; Atmosphere
ID CANOPY
AB DART model was extended for simulating satellite lidar signal of Earth-Atmosphere systems. The adopted approach combines Monte Carlo and flux tracking methods. It improves a lot signal to noise ratios of simulated waveforms. For accurate simulation of atmosphere photon tracing, the atmosphere modelling was modified for obtaining continuous vertical distribution of extinction coefficients. It leads to a much better accuracy than the use of atmosphere layers with constant extinction coefficients. This improvement is valid with any type of atmosphere, exponential or not.
C1 [Gastellu-Etchegorry, J. P.; Yin, T.; Grau, E.; Lauret, N.] Univ Toulouse, CESBIO CNES, CNRS, IRD,UMR 5126, Toulouse, France.
   [Rubio, J.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
   [Rubio, J.] Univ Maryland, Dpt Geog, College Pk, MD USA.
RP Gastellu-Etchegorry, JP (reprint author), Univ Toulouse, CESBIO CNES, CNRS, IRD,UMR 5126, Toulouse, France.
EM JEAN-PHILIPPE.GASTELL@CESBIO.CNES.FR
OI Grau, Eloi/0000-0001-5757-7239
FU French Space Center (CNES); AMAP
FX authors thank Paul Sabatier University and French Space Center (CNES)
   for their support, and AMAP for providing the 3D cherry tree
NR 9
TC 1
Z9 1
U1 0
U2 3
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2153-6996
BN 978-1-4799-1114-1
J9 INT GEOSCI REMOTE SE
PY 2013
BP 4554
EP 4557
DI 10.1109/IGARSS.2013.6723849
PG 4
WC Engineering, Electrical & Electronic; Geosciences, Multidisciplinary;
   Remote Sensing
SC Engineering; Geology; Remote Sensing
GA BB7JO
UT WOS:000345638904150
ER

PT S
AU Maruyama, Y
   Blacksberg, J
   Charbon, E
AF Maruyama, Yuki
   Blacksberg, Jordana
   Charbon, Edoardo
GP IEEE
TI A 1024x8 700ps Time-Gated SPAD Line Sensor for Laser Raman Spectroscopy
   and LIBS in Space and Rover-Based Planetary Exploration
SO 2013 IEEE INTERNATIONAL SOLID-STATE CIRCUITS CONFERENCE DIGEST OF
   TECHNICAL PAPERS (ISSCC)
SE IEEE International Solid State Circuits Conference
LA English
DT Proceedings Paper
CT IEEE International Solid-State Circuits Flagship Conference of the IEEE
   Solid-State-Circuits-Society (ISSCC)
CY FEB 17-21, 2013
CL San Francisco, CA
SP IEEE, IEEE Solid State Circuits Soc
C1 [Maruyama, Yuki; Charbon, Edoardo] Delft Univ Technol, Delft, Netherlands.
   [Blacksberg, Jordana] CALTECH, Jet Prop Lab, Pasadena, CA USA.
RP Maruyama, Y (reprint author), Delft Univ Technol, Delft, Netherlands.
NR 4
TC 1
Z9 1
U1 1
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0193-6530
BN 978-1-4673-4513-2; 978-1-4673-4515-6
J9 ISSCC DIG TECH PAP I
PY 2013
VL 56
BP 110
EP U894
PG 3
WC Engineering, Electrical & Electronic
SC Engineering
GA BE0QP
UT WOS:000366612300041
ER

PT J
AU Divsalar, D
AF Divsalar, Dariush
GP IEEE
TI Extending Divsalar's Bound to Nonbinary Codes with two Dimensional
   Constellations
SO 2013 IEEE INTERNATIONAL SYMPOSIUM ON INFORMATION THEORY PROCEEDINGS
   (ISIT)
SE IEEE International Symposium on Information Theory
LA English
DT Proceedings Paper
CT IEEE International Symposium on Information Theory Proceedings (ISIT)
CY JUL 07-12, 2013
CL Istanbul, TURKEY
SP IEEE, IEEE Informat Theory Soc
ID DECODING ERROR; PROBABILITY; PERFORMANCE
AB Closed form upper bounds to error probabilities of nonbinary coded systems with two and higher dimensional constellation over the additive white Gaussian noise channel are derived. Computation of these bounds do not require integrations nor parameter optimizations. These bounds are the extension of bounds derived by Divsalar in 1999 for binary codes with binary modulations. The proposed bounds require only the knowledge of the average pairwise Euclidean distance enumerator of the code words when certain symmetry conditions do not hold. The bounds are tight for large block lengths. We also briefly discuss how to extend the pairwise Euclidean distance enumerators to ensembles of nonbinary protograph codes using the notion of frequency weight enumerators.
C1 CALTECH, Jet Prop Lab, Pasadena, CA 91125 USA.
RP Divsalar, D (reprint author), CALTECH, Jet Prop Lab, Pasadena, CA 91125 USA.
EM Dariush.Divsalar@jpl.nasa.gov
NR 17
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4799-0446-4
J9 IEEE INT SYMP INFO
PY 2013
BP 3020
EP 3024
PG 5
WC Computer Science, Information Systems; Telecommunications
SC Computer Science; Telecommunications
GA BC0CQ
UT WOS:000348913403030
ER

PT S
AU Perrine, ML
   Rincon, R
   Fatoyinbo, T
   Zimmerman, R
   Spartana, N
   Robinson, F
   James, P
   Seufert, S
   Triesky, M
   Beltran, K
   Fon, P
AF Perrine, Martin L.
   Rincon, Rafael
   Fatoyinbo, Tamilola
   Zimmerman, Robert
   Spartana, Nicholas
   Robinson, Franklin
   James, Paul
   Seufert, Stephen
   Triesky, Michael
   Beltran, Kiara
   Fon, Paul
GP IEEE
TI Development of the RF Electronics Unit for NASA's Ecological Synthetic
   Aperture Radar
SO 2013 IEEE INTERNATIONAL SYMPOSIUM ON PHASED ARRAY SYSTEMS AND TECHNOLOGY
SE IEEE International Symposium on Phased Array Systems & Technology
LA English
DT Proceedings Paper
CT 5th IEEE International Symposium on Phased Array Systems and Technology
CY OCT 15-18, 2013
CL Waltham, MA
SP IEEE
DE SAR; Radar; polarimetry; interferometry; PolInSAR; transceiver;
   transmitter; receiver; array; wideband
AB In its Carbon Cycle research efforts, prioritized by the National Science Foundation Decadal Survey and mandated by the US Congress, NASA is developing an airborne P-band Ecological Synthetic Aperture Radar called EcoSAR. By using polarimetric and interferometric techniques, and a digital beamforming phased-array architecture, EcoSAR will characterize biomass and ecological structure in three dimensions aboard a P-3 aircraft. One of the main components in the EcoSAR instrument development is the 32 channel RF Electronics Unit (REU). The multi-channel solid-state REU design provides amplification, conditioning, blanking, and several calibration schemes to meet EcoSAR's science and engineering requirements. The design, assembly, and testing of the REU is well underway with 16 of 32 channels completed. The remaining channels are nearly finished. The REU, once complete, will be calibrated and integrated with the rest of the system in preparation for EcoSAR's first flight campaign.
C1 [Perrine, Martin L.; Rincon, Rafael; Fatoyinbo, Tamilola; Zimmerman, Robert; Spartana, Nicholas; Robinson, Franklin; James, Paul; Seufert, Stephen; Triesky, Michael; Beltran, Kiara; Fon, Paul] NASA, Goddard Space Flight Ctr, Flight Microwave & Telecommun Syst, Greenbelt, MD 20771 USA.
RP Perrine, ML (reprint author), NASA, Goddard Space Flight Ctr, Flight Microwave & Telecommun Syst, Greenbelt, MD 20771 USA.
EM martin.perrine@nasa.gov
RI Fatoyinbo, Temilola/G-6104-2012
OI Fatoyinbo, Temilola/0000-0002-1130-6748
NR 8
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1554-8422
BN 978-1-4673-1127-4
J9 IEEE INT SYMP PHASE
PY 2013
BP 191
EP 197
PG 7
WC Engineering, Electrical & Electronic
SC Engineering
GA BC1WA
UT WOS:000350442700034
ER

PT S
AU Host, NK
   Chen, CC
   Volakis, JL
   Miranda, FA
AF Host, Nicholas K.
   Chen, Chi-Chih
   Volakis, John L.
   Miranda, Felix A.
GP IEEE
TI Low Cost Beam-Steering Approach for a Series-Fed Array
SO 2013 IEEE INTERNATIONAL SYMPOSIUM ON PHASED ARRAY SYSTEMS AND TECHNOLOGY
SE IEEE International Symposium on Phased Array Systems & Technology
LA English
DT Proceedings Paper
CT 5th IEEE International Symposium on Phased Array Systems and Technology
CY OCT 15-18, 2013
CL Waltham, MA
SP IEEE
DE Phased arrays; phase control; transmission line; patch antennas;
   propagation constant
AB Phased array antennas showcase many advantages over mechanically steered systems. However, they are also more complex and costly. This paper presents a concept which overcomes these detrimental attributes by eliminating all of the phased array backend (including phase shifters). Instead, a propagation constant reconfigurable transmission line in a series fed array arrangement is used to allow phase shifting with one small (<= 100mil) linear mechanical motion. A novel slotted coplanar stripline design improves on previous transmission lines by demonstrating a greater control of propagation constant, thus allowing practical prototypes to be built. Also, beam steering pattern control is explored. We show that with correct choice of line impedance, pattern control is possible for all scan angles. A 20 element array scanning from -25 degrees <= theta <= 21 degrees with mostly uniform gain at 13GHz is presented. Measured patterns show a reduced scan range of 12 degrees <= theta <= 25 degrees due to a correctable manufacturing error as verified by simulation. Beam squint is measured to be +/- 2.5 degrees for a 600MHz bandwidth and cross-pol is measured to be at least -15dB.
C1 [Host, Nicholas K.; Chen, Chi-Chih; Volakis, John L.] Ohio State Univ, Columbus, OH 43210 USA.
   [Miranda, Felix A.] NASA, John Glenn Res Ctr, Cleveland, OH USA.
RP Host, NK (reprint author), Ohio State Univ, Columbus, OH 43210 USA.
NR 11
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1554-8422
BN 978-1-4673-1127-4
J9 IEEE INT SYMP PHASE
PY 2013
BP 293
EP 300
PG 8
WC Engineering, Electrical & Electronic
SC Engineering
GA BC1WA
UT WOS:000350442700053
ER

PT S
AU Hand, T
   Cooley, M
   Kempic, G
   Sall, D
   Stenger, P
   Woodworth, S
   Park, R
   Racette, PE
   Heymsfield, G
   Li, LH
AF Hand, Thomas
   Cooley, Michael
   Kempic, Gary
   Sall, David
   Stenger, Peter
   Woodworth, Sarah
   Park, Richard
   Racette, Paul E.
   Heymsfield, Gerald
   Li, Lihua
GP IEEE
TI Dual-Band Shared Aperture Reflector/Reflectarray Antenna Designs,
   Technologies and Demonstrations for NASA's ACE Radar
SO 2013 IEEE INTERNATIONAL SYMPOSIUM ON PHASED ARRAY SYSTEMS AND TECHNOLOGY
SE IEEE International Symposium on Phased Array Systems & Technology
LA English
DT Proceedings Paper
CT 5th IEEE International Symposium on Phased Array Systems and Technology
CY OCT 15-18, 2013
CL Waltham, MA
SP IEEE
DE Reflectarrays; Reflectors; Millimeter Wave; NASA Earth Science; Phased
   Arrays; AESA
ID REFLECTARRAY
AB NASA's planned Aerosol, Cloud and Ecosystems (ACE) mission will provide RF measurements for studying the role of aerosols on cloud development. The space-borne radar requires a fixed-beam at W-band and a wide-swath (>100 km) scanning beam at Ka-band.
   The full scale antenna is comprised of a parabolic cylinder reflector/reflectarray with a fixed W-band feed and a Ka-band Active Electronic Scanning Array (AESA) feed. Cassegrain folded optics is employed to reduce the required mass, volume, mechanical complexity and cost. An innovative reflectarray design provides a focused low-loss pencil beam at W-band, and is RF transparent at Ka-band. The AESA transmit/receive (T/R) modules provide high RF output power and low noise figure.
   Several planar reflector/reflectarray prototypes were designed and fabricated to validate the novel reflectarray element/surface technology and design methodology. The measured W/Ka band reflector/reflectarray gains and patterns agree very well with predictions thereby confirming the viability of the full scale design.
C1 [Hand, Thomas; Cooley, Michael; Kempic, Gary; Sall, David; Stenger, Peter; Woodworth, Sarah; Park, Richard] Northrop Grumman Elect Syst, Baltimore, MD 21240 USA.
   [Racette, Paul E.; Heymsfield, Gerald; Li, Lihua] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
RP Hand, T (reprint author), Northrop Grumman Elect Syst, Baltimore, MD 21240 USA.
EM thomas.hand@ngc.com
NR 20
TC 0
Z9 0
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1554-8422
BN 978-1-4673-1127-4
J9 IEEE INT SYMP PHASE
PY 2013
BP 352
EP 358
PG 7
WC Engineering, Electrical & Electronic
SC Engineering
GA BC1WA
UT WOS:000350442700063
ER

PT S
AU Lind, FD
   Lonsdale, CJ
   Faulkner, AJ
   Alexander, P
   Mattmann, C
AF Lind, Frank D.
   Lonsdale, Colin J.
   Faulkner, Andrew J.
   Alexander, Paul
   Mattmann, Chris
GP IEEE
TI Radio Array of Portable Interferometric Detectors (RAPID)
SO 2013 IEEE INTERNATIONAL SYMPOSIUM ON PHASED ARRAY SYSTEMS AND TECHNOLOGY
SE IEEE International Symposium on Phased Array Systems & Technology
LA English
DT Proceedings Paper
CT 5th IEEE International Symposium on Phased Array Systems and Technology
CY OCT 15-18, 2013
CL Waltham, MA
SP IEEE
ID RADAR OBSERVATIONS; IONOSPHERE; INSTABILITIES; SUN
AB The Radio Array of Portable Interferometric Detectors (RAPID) is a new radio array with a flexible architecture. The instrument uses per element software defined radios and a software signal processing architecture to enable the flexible study of a wide range of natural phenomena using radio imaging techniques. The array will be used for investigations of ionospheric phenomena, solar radio emission, the Galactic synchrotron background, and ultra-high energy cosmic rays via air-shower emission. The array will consist of similar to 100 small, low gain antennas operating over a frequency range of 48 to 450 MHz. RAPID is designed to make flexible and coherent radio observations, capturing the amplitude and phase of the electric field across a user-defined aperture with easily reconfigurable spatial sampling. Key technical elements include a novel absolute broadband antenna calibration method, elimination of a clock distribution network with a compact, low power chip scale atomic clock in each unit, state-of-the-art high performance voltage data recording, and low power consumption, via use of the latest low-power A/D converters and digital processing chips. By minimizing the power per element the RAPID system will be able to use compact, portable solar panels and batteries. Unlike existing arrays, RAPID will be operated without any cabling between the antennas and a central location, and can be shipped, deployed and physically reconfigured quickly and easily with zero site infrastructure. This creates a unique capability to locate and configure an imaging radio interferometer array, highly customized to the specific science goal of any given field campaign, thereby supporting science investigations that have not before been feasible. When used in conjunction with existing incoherent scatter radar transmitters or other transmitters of opportunity the array will provide a flexible capability for radar imaging of coherent and enhanced backscatter (e.g. E and F-region irregularities; naturally or artificially enhanced ion acoustic lines). The RAPID system architecture is based on voltage data capture with all processing performed in software, simplifying field operations and reducing equipment complexity. Data and work-flow management for the system will exploit distributed messaging, cloud technologies for scalable processing, and be implemented using open source Object Oriented Data Technology (OODT) software.
C1 [Lind, Frank D.; Lonsdale, Colin J.] MIT, Haystack Observ, Westford, MA 01886 USA.
   [Faulkner, Andrew J.; Alexander, Paul] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England.
   [Mattmann, Chris] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
RP Lind, FD (reprint author), MIT, Haystack Observ, Route 40, Westford, MA 01886 USA.
EM flind@haystack.mit.edu; cjl@haystack.mit.edu; ajf@mrao.cam.ac.uk;
   pa@mrao.cam.ac.uk; chris.a.mattmann@nasa.gov
NR 22
TC 0
Z9 0
U1 0
U2 3
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1554-8422
BN 978-1-4673-1127-4
J9 IEEE INT SYMP PHASE
PY 2013
BP 676
EP 683
PG 8
WC Engineering, Electrical & Electronic
SC Engineering
GA BC1WA
UT WOS:000350442700116
ER

PT J
AU Quirk, KJ
   Srinivasan, M
AF Quirk, Kevin J.
   Srinivasan, Meera
GP IEEE
TI Optical PPM Demodulation From Slot-Sampled Photon Counting Detectors
SO 2013 IEEE MILITARY COMMUNICATIONS CONFERENCE (MILCOM 2013)
LA English
DT Proceedings Paper
CT IEEE Military Communications Conference
CY NOV 18-20, 2013
CL BAE Syst, San Diego, CA
SP IEEE, IEEE Comp Soc, AFCEA, IEEE Commun Soc, MITRE
HO BAE Syst
DE Optical Communication; Pulse Position Modulation; Synchronization; Least
   Squares Methods
AB A scheme for the demodulation of an optical PPM signal from the sampled output of a photon counting detector is presented. The receiver operates on a time-series of samples, one sample per slot, from the bandlimited output of a photon counting detector operating in a photon starved channel. Algorithms to estimate the photon arrivals, interpolate the slot statistics, and estimate the slot phase in the presence of a sample to slot clock frequency offset are given, and the system performance is evaluated for a deep space optical communications link.
C1 [Quirk, Kevin J.; Srinivasan, Meera] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
RP Quirk, KJ (reprint author), CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
EM kquirk@jpl.nasa.gov; msrini@jpl.nasa.gov
NR 8
TC 0
Z9 0
U1 1
U2 4
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-0-7695-5124-1
PY 2013
BP 1634
EP 1638
DI 10.1109/MILCOM.2013.277
PG 5
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BB8PB
UT WOS:000347184000272
ER

PT S
AU Chattopadhyay, G
   Reck, TJ
   Jung-Kubiak, C
   Siles, JV
   Lee, C
   Lin, R
   Mehdi, I
AF Chattopadhyay, Goutam
   Reck, Theodore J.
   Jung-Kubiak, Cecile
   Siles, Jose V.
   Lee, Choonsup
   Lin, Robert
   Mehdi, Imran
GP IEEE
TI Silicon Micromachining for Terahertz Component Development
SO 2013 IEEE MTT-S INTERNATIONAL MICROWAVE AND RF CONFERENCE
SE IEEE MTT-S International Microwave and RF Conference
LA English
DT Proceedings Paper
CT IEEE MTT-S International Microwave and RF Conference
CY DEC 14-16, 2013
CL New Delhi, INDIA
SP IEEE MTT S
DE Filter; terahertz; silicon; micromachine; DRIE
ID TECHNOLOGY
AB Waveguide component technology at terahertz frequencies has come of age in recent years. Essential components such as ortho-mode transducers (OMT), quadrature hybrids, filters, and others for high performance system development were either impossible to build or too difficult to fabricate with traditional machining techniques. With micromachining of silicon wafers coated with sputtered gold it is now possible to fabricate and test these waveguide components. Using a highly optimized Deep Reactive Ion Etching (DRIE) process, we are now able to fabricate silicon micromachined waveguide structures working beyond 1 THz. In this paper, we describe in detail our approach of design, fabrication, and measurement of silicon micromachined waveguide components and report the results of a 1 THz canonical E-plane filter.
C1 [Chattopadhyay, Goutam; Reck, Theodore J.; Jung-Kubiak, Cecile; Siles, Jose V.; Lee, Choonsup; Lin, Robert; Mehdi, Imran] CALTECH, NASA, Jet Prop Lab, Pasadena, CA 91109 USA.
RP Chattopadhyay, G (reprint author), CALTECH, NASA, Jet Prop Lab, Pasadena, CA 91109 USA.
NR 16
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2377-9144
J9 IEEE MTTS INT MICRO
PY 2013
PG 4
WC Engineering, Electrical & Electronic; Physics, Applied
SC Engineering; Physics
GA BC4QN
UT WOS:000352852100004
ER

PT S
AU Effland, J
   Claude, SMX
   Ediss, GA
   Dindo, P
   Jiang, F
   Horner, N
   Niranjanan, P
   Schmitt, D
   Yeung, K
AF Effland, J.
   Claude, S. M. X.
   Ediss, G. A.
   Dindo, P.
   Jiang, F.
   Horner, N.
   Niranjanan, P.
   Schmitt, D.
   Yeung, K.
GP IEEE
TI The ALMA North American Receivers
SO 2013 IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST (IMS)
SE IEEE MTT-S International Microwave Symposium
LA English
DT Proceedings Paper
CT IEEE MTT-S International Microwave Symposium Digest (IMS)
CY JUN 02-07, 2013
CL Seattle, WA
SP IEE MTT S
DE Millimeter-wave; heterodyne; sideband-separating; image rejecting; SIS
   mixer; receiver; radio astronomy; interferometer; ALMA
AB Receivers for the Atacama Large Millimeter/submillimeter Array are designed to include 10 frequency bands, and results are presented here for the Band 3 (84-116 GHz) and Band 6 (211-275 GHz) cryogenically cooled dual-polarization, signal-sideband receivers. A total of 73 such receivers were constructed for each band.
C1 [Effland, J.; Horner, N.; Schmitt, D.] Natl Radio Astron Observ, Edgemont Rd, Charlottesville, VA 22903 USA.
   [Claude, S. M. X.; Dindo, P.; Jiang, F.; Niranjanan, P.; Yeung, K.] Natl Res Council Canada, Victoria, BC V9E 2E7, Canada.
   [Ediss, G. A.] NASA, SOFIA Sci Ctr, Univ Space Res Assoc, Ames Res Ctr, Moffett Field, CA 94035 USA.
RP Effland, J (reprint author), Natl Radio Astron Observ, Edgemont Rd, Charlottesville, VA 22903 USA.
NR 10
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0149-645X
BN 978-1-4673-2141-9; 978-1-4673-6177-4
J9 IEEE MTT S INT MICR
PY 2013
PG 3
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BE2OX
UT WOS:000369754300235
ER

PT S
AU Golcuk, F
   Fung, A
   Rebeiz, GM
AF Golcuk, F.
   Fung, A.
   Rebeiz, G. M.
GP IEEE
TI A 0.37-0.43 THz Wideband Quadrupler with 160 mu W Peak Output Power in
   45 nm CMOS
SO 2013 IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST (IMS)
SE IEEE MTT-S International Microwave Symposium
LA English
DT Proceedings Paper
CT IEEE MTT-S International Microwave Symposium Digest (IMS)
CY JUN 02-07, 2013
CL Seattle, WA
SP IEE MTT S
DE CMOS; frequency multiplier; mm-wave; quadrupler; THz sources
AB This paper presents a wideband 45 nm CMOS SOI quadrupler at 370 to > 430 GHz. The balanced multiplier results in a very low third harmonic component, and uses reflectors at the output port to reflect the fundamental and the second harmonic frequency into the quadrupler for improved efficiency. The measured output power is > 100 W at 370-430 GHz with a peak value of 150-160 W at 390-415 GHz and a conversion loss of 19-20 dB. To the author's knowledge, this is the first demonstration of a wideband CMOS quadrupler at THz frequencies.
C1 [Golcuk, F.; Rebeiz, G. M.] Univ Calif San Diego, La Jolla, CA 92093 USA.
   [Fung, A.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
RP Golcuk, F (reprint author), Univ Calif San Diego, La Jolla, CA 92093 USA.
NR 11
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0149-645X
BN 978-1-4673-2141-9; 978-1-4673-6177-4
J9 IEEE MTT S INT MICR
PY 2013
PG 4
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BE2OX
UT WOS:000369754300323
ER

PT S
AU Hacker, J
   Urteaga, M
   Seo, M
   Skalare, A
   Lin, R
AF Hacker, Jonathan
   Urteaga, Miguel
   Seo, Munkyo
   Skalare, Anders
   Lin, Robert
GP IEEE
TI InP HBT Amplifier MMICs Operating to 0.67 THz
SO 2013 IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST (IMS)
SE IEEE MTT-S International Microwave Symposium
LA English
DT Proceedings Paper
CT IEEE MTT-S International Microwave Symposium Digest (IMS)
CY JUN 02-07, 2013
CL Seattle, WA
SP IEE MTT S
DE Submillimeter-wave; terahertz; TMIC; indium phosphide (InP) DHBT bipolar
   transistor
AB Two indium-phosphide (InP) double-heterojunction bipolar transistor (DHBT) based terahertz monolithic integrated circuit (TMIC) amplifiers are reported with record operating bandwidths up to 694 GHz. The first amplifier uses 3 mu m long emitter transistors, has 24 dB gain at 670 GHz, and a saturated output power of -4 dBm at 585 GHz. The second amplifier uses 6 mu m long emitter transistors, has 20 dB gain at 655 GHz, and a saturated output power of -0.7 dBm at 585 GHz. Both TMICs use Teledyne's 130nm InP DHBT transistors in a common base configuration and are matched using inverted CPW transmission lines realized using a three-metal-layer high-density thin-film interconnects system. These results demonstrate the capability of 130nm InP DHBT technology to enable sophisticated TMIC circuits for operation in the terahertz band.
C1 [Hacker, Jonathan; Urteaga, Miguel; Seo, Munkyo] Teledyne Sci Co, Thousand Oaks, CA 91360 USA.
   [Skalare, Anders; Lin, Robert] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
RP Hacker, J (reprint author), Teledyne Sci Co, Thousand Oaks, CA 91360 USA.
NR 8
TC 0
Z9 0
U1 1
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0149-645X
BN 978-1-4673-2141-9; 978-1-4673-6177-4
J9 IEEE MTT S INT MICR
PY 2013
PG 3
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BE2OX
UT WOS:000369754300189
ER

PT S
AU Larkoski, PV
   Kangaslahti, P
   Samoska, L
   Lai, R
   Sarkozy, S
   Church, SE
AF Larkoski, Patricia V.
   Kangaslahti, Pekka
   Samoska, Lorene
   Lai, Richard
   Sarkozy, Stephen
   Church, Sarah E.
GP IEEE
TI Low Noise Amplifiers for 140 GHz Wide-Band Cryogenic Receivers
SO 2013 IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST (IMS)
SE IEEE MTT-S International Microwave Symposium
LA English
DT Proceedings Paper
CT IEEE MTT-S International Microwave Symposium Digest (IMS)
CY JUN 02-07, 2013
CL Seattle, WA
SP IEE MTT S
DE Astronomy; Cryogenic electronics; HEMTs; Low-noise amplifiers; MMICs;
   Noise measurement
AB We report S-parameter and noise measurements for three different InP 35 nm gate-length High Electron Mobility Transistor (HEMT) Low Noise Amplifier (LNA) designs operating in the frequency range centered on 140 GHz. When packaged in a WR-6.1 waveguide housing, the LNAs have an average measured noise figure of 3.0 dB - 3.6 dB over the 122 - 170 GHz band. One LNA was cooled to 20 K and a record low noise temperature of 46 K, or 0.64 dB noise figure, was measured at 152 GHz. These amplifiers can be used to develop receivers for instruments that operate in the 130 - 170 GHz atmospheric window, which is an important frequency band for ground-based astronomy and millimeter-wave imaging applications.
C1 [Larkoski, Patricia V.; Church, Sarah E.] Stanford Univ, Stanford, CA 94305 USA.
   [Larkoski, Patricia V.; Church, Sarah E.] Kavli Inst Particle Astrophys & Cosmol, Stanford, CA 94305 USA.
   [Kangaslahti, Pekka; Samoska, Lorene] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
   [Lai, Richard; Sarkozy, Stephen] Northrop Grumman Corp, Redondo Beach, CA 90278 USA.
RP Larkoski, PV (reprint author), Stanford Univ, Stanford, CA 94305 USA.
NR 8
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0149-645X
BN 978-1-4673-2141-9; 978-1-4673-6177-4
J9 IEEE MTT S INT MICR
PY 2013
PG 4
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BE2OX
UT WOS:000369754300344
ER

PT S
AU Reck, TJ
   Gorospe, B
   Deal, W
   Chattopadhyay, G
AF Reck, Theodore J.
   Gorospe, Ben
   Deal, William
   Chattopadhyay, Goutam
GP IEEE
TI A Tandem Coupler for Terahertz Integrated Circuits
SO 2013 IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST (IMS)
SE IEEE MTT-S International Microwave Symposium
LA English
DT Proceedings Paper
CT IEEE MTT-S International Microwave Symposium Digest (IMS)
CY JUN 02-07, 2013
CL Seattle, WA
SP IEE MTT S
DE Tandem Coupler; MMIC; On-wafer measurements; CPW
AB A coplanar waveguide 3 dB quadrature coupler operating from 500 to 700 GHz is designed, fabricated and measured. On-wafer measurements demonstrate an amplitude balance of +/- 2 dB and phase balance of +/- 20 deg.
C1 [Reck, Theodore J.; Chattopadhyay, Goutam] CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
   [Gorospe, Ben; Deal, William] Northrop Grumman Aerosp Syst, Redondo Beach, CA 90278 USA.
RP Reck, TJ (reprint author), CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
NR 6
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0149-645X
BN 978-1-4673-2141-9; 978-1-4673-6177-4
J9 IEEE MTT S INT MICR
PY 2013
PG 3
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BE2OX
UT WOS:000369754300291
ER

PT S
AU Seo, M
   Urteaga, M
   Hacker, J
   Young, A
   Skalare, A
   Lin, R
   Rodwell, M
AF Seo, Munkyo
   Urteaga, Miguel
   Hacker, Jonathan
   Young, Adam
   Skalare, Anders
   Lin, Robert
   Rodwell, Mark
GP IEEE
TI A 600 GHz InP HBT Amplifier Using Cross-Coupled Feedback Stabilization
   and Dual-Differential Power Combining
SO 2013 IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST (IMS)
SE IEEE MTT-S International Microwave Symposium
LA English
DT Proceedings Paper
CT IEEE MTT-S International Microwave Symposium Digest (IMS)
CY JUN 02-07, 2013
CL Seattle, WA
SP IEE MTT S
DE Terahertz; hetero-junction bipolar transistors; amplifiers;
   cross-coupled feedback; power combining
AB We report a 600 GHz amplifier with > 30 dB peak gain, based on 12 cascaded differential common-base (CB) stages, in a 130 nm InP HBT process. Three consecutive CB stages are grouped as a unit gain block, sharing a common bias current. Each CB stage is stabilized by cross-coupled capacitive feedback. Output powers from two differential branches are combined through a 4-way combiner, resulting in a 4x increase in power compared to a single single-ended output stage. On-wafer testing in WR-1.5 band (500-750 GHz) shows that the amplifier exhibits > 20 dB of gain up to 620 GHz, with +2.8 dBm of saturated output power at 585 GHz, while consuming 455 mW.
C1 [Seo, Munkyo; Urteaga, Miguel; Hacker, Jonathan; Young, Adam] Teledyne Sci Co, Thousand Oaks, CA USA.
   [Skalare, Anders; Lin, Robert] CALTECH, Jet Prop Lab, Pasadena, CA USA.
   [Rodwell, Mark] Univ Calif Santa Barbara, Santa Barbara, CA 93106 USA.
RP Seo, M (reprint author), Teledyne Sci Co, Thousand Oaks, CA USA.
NR 5
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0149-645X
BN 978-1-4673-2141-9; 978-1-4673-6177-4
J9 IEEE MTT S INT MICR
PY 2013
PG 3
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BE2OX
UT WOS:000369754300362
ER

PT S
AU Simons, RN
   Force, DA
   Kacpura, TJ
AF Simons, Rainee N.
   Force, Dale A.
   Kacpura, Thomas J.
GP IEEE
TI High Efficiency Traveling-Wave Tube Power Amplifier for Ka-Band Software
   Defined Radio on International Space Station - A Platform for
   Communications Technology Development
SO 2013 IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST (IMS)
SE IEEE MTT-S International Microwave Symposium
LA English
DT Proceedings Paper
CT IEEE MTT-S International Microwave Symposium Digest (IMS)
CY JUN 02-07, 2013
CL Seattle, WA
SP IEE MTT S
DE Microwave amplifiers; power amplifiers; radio; satellite communications;
   software defined radio; space communications; transmitters;
   traveling-wave tubes
AB The design, fabrication and RF performance of the output traveling-wave tube amplifier (TWTA) for a space based Ka-band software defined radio (SDR) is presented. The TWTA, the SDR and the supporting avionics are integrated to forms a testbed, which is currently located on an exterior truss of the International Space Station (ISS). The SDR in the testbed communicates at Ka-band frequencies through a high-gain antenna directed to NASA's Tracking and Data Relay Satellite System (TDRSS), which communicates to the ground station located at White Sands Complex. The application of the testbed is for demonstrating new waveforms and software designed to enhance data delivery from scientific spacecraft and, the waveforms and software can be upgraded and reconfigured from the ground. The construction and the salient features of the Kaband SDR are discussed. The testbed is currently undergoing onorbit checkout and commissioning and is expected to operate for five years in space.
C1 [Simons, Rainee N.; Force, Dale A.; Kacpura, Thomas J.] NASA, Glenn Res Ctr, MS 54-1,21000 Brookpk Rd, Cleveland, OH 44135 USA.
RP Simons, RN (reprint author), NASA, Glenn Res Ctr, MS 54-1,21000 Brookpk Rd, Cleveland, OH 44135 USA.
NR 8
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0149-645X
BN 978-1-4673-2141-9; 978-1-4673-6177-4
J9 IEEE MTT S INT MICR
PY 2013
PG 4
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BE2OX
UT WOS:000369754300160
ER

PT S
AU Tang, A
   Chang, MCF
AF Tang, Adrian
   Chang, Mau-Chung Frank
GP IEEE
TI Calibration and Optimization of CMOS mm-Wave Transceivers
SO 2013 IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST (IMS)
SE IEEE MTT-S International Microwave Symposium
LA English
DT Proceedings Paper
CT IEEE MTT-S International Microwave Symposium Digest (IMS)
CY JUN 02-07, 2013
CL Seattle, WA
SP IEE MTT S
DE millimeter-wave calibration; mm-wave optimization
AB Deep sub-micron CMOS offers relatively low RF performance at mm-wave frequencies compared with III-V technologies and the high levels of process variation further exacerbate design margins and poor performance. Instead of optimizing mm-wave circuits for performance at design time, we instead adopt a "maximum tune-ability" approach in which the mm-wave front-end circuitry is made highly tunable and optimized at run-time by digital control and optimization algorithms to overcome process variation effects.
C1 [Tang, Adrian] CALTECH, Jet Prop Lab, Pasadena, CA USA.
   [Chang, Mau-Chung Frank] Univ Calif Los Angeles, Los Angeles, CA USA.
RP Tang, A (reprint author), CALTECH, Jet Prop Lab, Pasadena, CA USA.
NR 6
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0149-645X
BN 978-1-4673-2141-9; 978-1-4673-6177-4
J9 IEEE MTT S INT MICR
PY 2013
PG 3
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BE2OX
UT WOS:000369754300472
ER

PT S
AU Tang, A
   Virbila, G
   Hsiao, F
   Wu, H
   Murphy, D
   Mehdi, I
   Siegel, PH
   Chang, MCF
AF Tang, Adrian
   Virbila, Gabriel
   Hsiao, Frank
   Wu, Hao
   Murphy, David
   Mehdi, Imran
   Siegel, P. H.
   Chang, M-C. Frank
GP IEEE
TI A 2x2 W-Band Reference Time-Shifted Phase-Locked Transmitter Array in
   65nm CMOS Technology
SO 2013 IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST (IMS)
SE IEEE MTT-S International Microwave Symposium
LA English
DT Proceedings Paper
CT IEEE MTT-S International Microwave Symposium Digest (IMS)
CY JUN 02-07, 2013
CL Seattle, WA
SP IEE MTT S
DE PLL Reference Time-Shifting; W-band; Phased Array Transmitter
AB This paper presents a complete 2x2 phased array transmitter system operating at W-band (90-95 GHz) which employs a PLL reference time-shifting approach instead of using traditional mm-wave phase shifters. PLL reference shifting enables a phased array to be distributed over multiple chips without the need for coherent mm-wave signal distribution between chips. The proposed phased array transmitter system consumes 248 mW per array element when implemented in a 65 nm CMOS technology.
C1 [Tang, Adrian; Mehdi, Imran; Siegel, P. H.] CALTECH, Jet Prop Lab, Pasadena, CA USA.
   [Virbila, Gabriel; Hsiao, Frank; Wu, Hao; Chang, M-C. Frank] Univ Calif Los Angeles, Los Angeles, CA USA.
   [Murphy, David] Broadcom Corp, Irvine, CA USA.
RP Tang, A (reprint author), CALTECH, Jet Prop Lab, Pasadena, CA USA.
NR 4
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0149-645X
BN 978-1-4673-2141-9; 978-1-4673-6177-4
J9 IEEE MTT S INT MICR
PY 2013
PG 3
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BE2OX
UT WOS:000369754300061
ER

PT S
AU Tang, A
   Cooper, KB
   Dengler, RJ
   Llombart, N
   Siegel, PH
AF Tang, Adrian
   Cooper, Ken B.
   Dengler, Robert J.
   Llombart, Nuria
   Siegel, Peter H.
GP IEEE
TI Automatic Focusing for a 675 GHz Imaging Radar with Target Standoff
   Distances from 14 to 34 Meters
SO 2013 IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST (IMS)
SE IEEE MTT-S International Microwave Symposium
LA English
DT Proceedings Paper
CT IEEE MTT-S International Microwave Symposium Digest (IMS)
CY JUN 02-07, 2013
CL Seattle, WA
SP IEE MTT S
DE Automatic Focus; THz Imaging Radar
AB This paper discusses the issue of limited focal depth for high-resolution imaging radar operating over a wide range of standoff distances. We describe a technique for automatically focusing a THz imaging radar system using translational optics combined with range estimation based on a reduced chirp bandwidth setting. The demonstrated focusing algorithm estimates the correct focal depth for desired targets in the field of view at unknown standoffs and in the presence of clutter to provide good imagery at 14 to 30 meters of standoff.
C1 [Tang, Adrian; Cooper, Ken B.; Dengler, Robert J.; Siegel, Peter H.] CALTECH, Jet Prop Lab, Pasadena, CA 91125 USA.
   [Llombart, Nuria] Univ Complutense Madrid, Madrid, Spain.
RP Tang, A (reprint author), CALTECH, Jet Prop Lab, Pasadena, CA 91125 USA.
NR 3
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0149-645X
BN 978-1-4673-2141-9; 978-1-4673-6177-4
J9 IEEE MTT S INT MICR
PY 2013
PG 3
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BE2OX
UT WOS:000369754300017
ER

PT S
AU Tang, A
   Virbila, G
   Wu, H
   Chang, MCF
AF Tang, Adrian
   Virbila, Gabriel
   Wu, Hao
   Chang, Mau-Chung Frank
GP IEEE
TI A 155 GHz 220mW Synthesizer-Free Phase Based Radar System in 65nm CMOS
   Technology
SO 2013 IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST (IMS)
SE IEEE MTT-S International Microwave Symposium
LA English
DT Proceedings Paper
CT IEEE MTT-S International Microwave Symposium Digest (IMS)
CY JUN 02-07, 2013
CL Seattle, WA
SP IEE MTT S
DE Phased Radar; Synthesizer-Free Radar; CMOS mm-wave
AB This paper presents a complete phase-based radar system operating at 155 GHz which employs a non-coherent approach to ranging, offering the major advantage that frequency synthesizers are not needed in the Tx and Rx. This enables the possibility of multi-pixel radar systems through a 51% reduction of total system power vs. similar coherent radar. The proposed radar system achieves sub-centimeter target position accuracy and consumes only 220mW per radar channel (excluding commercial phase detector) in a 65nm CMOS technology.
C1 [Tang, Adrian] CALTECH, Jet Prop Lab, Pasadena, CA USA.
   [Tang, Adrian; Virbila, Gabriel; Wu, Hao; Chang, Mau-Chung Frank] Univ Calif Los Angeles, Los Angeles, CA USA.
RP Tang, A (reprint author), CALTECH, Jet Prop Lab, Pasadena, CA USA.
NR 4
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0149-645X
BN 978-1-4673-2141-9; 978-1-4673-6177-4
J9 IEEE MTT S INT MICR
PY 2013
PG 3
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BE2OX
UT WOS:000369754300013
ER

PT S
AU Tang, A
   Gu, Q
AF Tang, Adrian
   Gu, Qun
GP IEEE
TI A High-Precision Millimeter-Wave Navigation System for Indoor and Urban
   Environment Autonomous Vehicles
SO 2013 IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST (IMS)
SE IEEE MTT-S International Microwave Symposium
LA English
DT Proceedings Paper
CT IEEE MTT-S International Microwave Symposium Digest (IMS)
CY JUN 02-07, 2013
CL Seattle, WA
SP IEE MTT S
DE millimeter-wave navigation; UAV navigation
AB This paper presents a mm-wave based navigation system capable of measuring and tracking a vehicle's position with centimeter scale accuracy. The system uses two 144 GHz transmitters modulated with 13 and 14 MHz tones combined with quasi-optical lenses to establish a mm-wave beam that defines navigational pathway for a vehicle to follow. The system is suitable for applications where precision guiding of small autonomous vehicles along a precise path is required such as navigating indoors or in cluttered urban environments.
C1 [Tang, Adrian] CALTECH, Jet Prop Lab, Pasadena, CA USA.
   [Gu, Qun] Univ Calif Davis, Davis, CA 95616 USA.
RP Tang, A (reprint author), CALTECH, Jet Prop Lab, Pasadena, CA USA.
NR 4
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0149-645X
BN 978-1-4673-2141-9; 978-1-4673-6177-4
J9 IEEE MTT S INT MICR
PY 2013
PG 3
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BE2OX
UT WOS:000369754300002
ER

PT S
AU Varonen, M
   Reeves, R
   Kangaslahti, P
   Samoska, L
   Akgiray, A
   Cleary, K
   Gawande, R
   Fung, A
   Gaier, T
   Weinreb, S
   Readhead, ACS
   Lawrence, C
   Sarkozy, S
   Lai, R
AF Varonen, Mikko
   Reeves, Rodrigo
   Kangaslahti, Pekka
   Samoska, Lorene
   Akgiray, Ahmed
   Cleary, Kieran
   Gawande, Rohit
   Fung, Andy
   Gaier, Todd
   Weinreb, Sander
   Readhead, Anthony C. S.
   Lawrence, Charles
   Sarkozy, Stephen
   Lai, Richard
GP IEEE
TI A 75-116-GHz LNA with 23-K Noise Temperature at 108 GHz
SO 2013 IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST (IMS)
SE IEEE MTT-S International Microwave Symposium
LA English
DT Proceedings Paper
CT IEEE MTT-S International Microwave Symposium Digest (IMS)
CY JUN 02-07, 2013
CL Seattle, WA
SP IEE MTT S
DE InP HEMT; MMIC; low-noise amplifier; cryogenic
AB In this paper we present the design and measurement results, both on-wafer and in package, of an ultralow- noise and wideband monolithic microwave integrated circuit (MMIC) amplifier in the frequency range of 75 to 116 GHz. The three-stage amplifier packaged in a WR10 waveguide housing and fabricated using a 35-nm InP HEMT technology achieves a record noise temperature of 23 K at 108 GHz when cryogenically cooled to 27 K. The measured gain is 22 to 27 dB for frequency range of 75 to 116 GHz. Furthermore, the amplifier utilizes fourfinger devices with a total gate width of 60 mu m resulting in higher output power. Therefore, we consider that this amplifier achieves state-of-the-art performance in terms of bandwidth, noise temperature, gain, and linearity so far reported for cryogenically cooled amplifiers around W-band.
C1 [Varonen, Mikko; Kangaslahti, Pekka; Samoska, Lorene; Fung, Andy; Gaier, Todd] CALTECH, Jet Prop Lab, Pasadena, CA 91011 USA.
   [Reeves, Rodrigo; Akgiray, Ahmed; Cleary, Kieran; Gawande, Rohit; Weinreb, Sander; Readhead, Anthony C. S.; Lawrence, Charles] CALTECH, Pasadena, CA 91125 USA.
   [Sarkozy, Stephen; Lai, Richard] Northrop Grumman Corp, Redondo Beach, CA 90278 USA.
RP Varonen, M (reprint author), CALTECH, Jet Prop Lab, Pasadena, CA 91011 USA.
NR 12
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0149-645X
BN 978-1-4673-2141-9; 978-1-4673-6177-4
J9 IEEE MTT S INT MICR
PY 2013
PG 3
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BE2OX
UT WOS:000369754300265
ER

PT S
AU Xie, YS
   Fan, X
   Chen, YP
   Wilson, JD
   Simons, RN
   Xiao, JQ
AF Xie, Yunsong
   Fan, Xin
   Chen, Yunpeng
   Wilson, Jeffrey D.
   Simons, Rainee N.
   Xiao, John Q.
GP IEEE
TI Characterizing the In-Phase Reflection Bandwidth Theoretical Limit of
   Artificial Magnetic Conductors with Transmission Line Model
SO 2013 IEEE MTT-S INTERNATIONAL MICROWAVE SYMPOSIUM DIGEST (IMS)
SE IEEE MTT-S International Microwave Symposium
LA English
DT Proceedings Paper
CT IEEE MTT-S International Microwave Symposium Digest (IMS)
CY JUN 02-07, 2013
CL Seattle, WA
SP IEE MTT S
DE Surface impedance; transmission line matrix methods
ID SURFACES; ABSORBERS; ANTENNAS
AB We validate through simulation and experiment that artificial magnetic conductors (AMC's) can be well characterized by a transmission line model. The theoretical bandwidth limit of the in -phase reflection can be expressed in terms of the effective RLC parameters from the surface patch and the properties of the substrate. It is found that the existence of effective inductive components will reduce the in -phase reflection bandwidth of the AMC. Furthermore, we propose design strategies to optimize AMC structures with an in -phase reflection bandwidth closer to the theoretical limit.
C1 [Xie, Yunsong; Fan, Xin; Chen, Yunpeng; Xiao, John Q.] Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA.
   [Wilson, Jeffrey D.; Simons, Rainee N.] Natl Aeronaut & Space Adm, Glenn Res Ctr, Cleveland, OH 44135 USA.
RP Xie, YS (reprint author), Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA.
NR 10
TC 0
Z9 0
U1 1
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 0149-645X
BN 978-1-4673-2141-9; 978-1-4673-6177-4
J9 IEEE MTT S INT MICR
PY 2013
PG 4
WC Engineering, Electrical & Electronic; Telecommunications
SC Engineering; Telecommunications
GA BE2OX
UT WOS:000369754300132
ER

PT J
AU Nowicki, SF
   Hunter, SD
   Parsons, AM
   Chen, H
AF Nowicki, Suzanne F.
   Hunter, Stanley D.
   Parsons, Ann. M.
   Chen, Henry
GP IEEE
TI Up Down Gamma Discrimination using the Imaging Ratio Method with CZT
   Gamma-Ray Detectors for In Situ and Remote Sensing Operations
SO 2013 IEEE NUCLEAR SCIENCE SYMPOSIUM AND MEDICAL IMAGING CONFERENCE
   (NSS/MIC)
LA English
DT Proceedings Paper
CT 60th IEEE Nuclear Science Symposium (NSS) / Medical Imaging Conference
   (MIC) / 20th International Workshop on Room-Temperature Semiconductor
   X-ray and Gamma-ray Detectors
CY OCT 27-NOV 02, 2013
CL Seoul, SOUTH KOREA
SP IEEE, Inst Elect & Elect Engineers, Nucl & Plasma Sci Soc
DE Gamma ray; imaging spectrometer; CZT; imaging ratio method; background
   reduction; planetary science
AB The neutron/gamma-ray group at NASA GSFC is currently developing the Imaging Gamma-ray Spectrometer (IGS), a next generation compact high-resolution high sensitivity gamma-ray imaging spectrometer. The innovative technology for IGS is the pixelated room-temperature semiconductor Cadmium Zinc Telluride (CZT) detector. This technology gives IGS the advantages of low mass and low power imaging over a large field of view and high spectroscopic resolution (1% FWHM at 662 keV). The imaging capabilities of pixelated CZT detectors can be used to determine the incoming directions of gamma rays. Therefore, it is possible to improve the sensitivity of the IGS to a planet below it by discriminating the gamma rays originating from above the IGS such as from the activation of the spacecraft. In this paper, the imaging ratio method is used to demonstrate that the gamma rays coming from a point source placed above the detectors can be eliminated from the energy spectrum thus improving the sensitivity of the detector to the gamma rays originating from below.
C1 [Nowicki, Suzanne F.; Hunter, Stanley D.; Parsons, Ann. M.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20770 USA.
   [Chen, Henry] Redlen Technol Inc, Saanichton, BC V8M 0A5, Canada.
RP Nowicki, SF (reprint author), NASA, Goddard Space Flight Ctr, Greenbelt, MD 20770 USA.
EM suzanne.f.nowicki@nasa.gov; stanley.d.hunter@nasa.gov;
   ann.m.parsons@nasa.gov; henry.chen@redlen.com
FU NASA
FX This work was supported by the NASA's Goddard Space Flight Center
   Internal Research Development Program.
NR 3
TC 0
Z9 0
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4799-0534-8
PY 2013
PG 5
WC Engineering, Electrical & Electronic; Physics, Applied; Radiology,
   Nuclear Medicine & Medical Imaging
SC Engineering; Physics; Radiology, Nuclear Medicine & Medical Imaging
GA BB8OY
UT WOS:000347163503072
ER

PT S
AU Yu, N
AF Yu, Nan
GP IEEE
TI Exploring Crystalline Whispering Gallery Mode Resonators and Their
   Applications
SO 2013 IEEE PHOTONICS CONFERENCE (IPC)
SE IEEE Photonics Conference
LA English
DT Proceedings Paper
CT 26th IEEE Photonics Conference (IPC)
CY SEP 08-12, 2013
CL Bellevue, WA
SP IEEE, Amer Chem Soc, Multidisciplinary Digital Publishing Inst, IEEE Cloud Comp, LioniX
AB Taking advantage of some of unique optical properties of crystalline materials, we explore use of crystalline whispering gallery mode resonators for laser frequency stabilization, nonlinear frequency conversion, and low threshold UV laser.
C1 [Yu, Nan] CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
RP Yu, N (reprint author), CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
EM nan.yu@jpl.nasa.gov
NR 8
TC 0
Z9 0
U1 0
U2 2
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2374-0140
BN 978-1-4577-1507-5
J9 IEEE PHOTON CONF
PY 2013
BP 211
EP 212
PG 2
WC Engineering, Electrical & Electronic; Optics
SC Engineering; Optics
GA BE2RE
UT WOS:000369918000114
ER

PT S
AU Nam, S
   Calkins, B
   Gerritts, T
   Harrington, S
   Lita, AE
   Marsili, F
   Verma, VB
   Vayshenker, I
   Mirin, RP
   Shaw, M
   Farr, W
   Stern, JA
AF Nam, S.
   Calkins, B.
   Gerritts, T.
   Harrington, S.
   Lita, A. E.
   Marsili, F.
   Verma, V. B.
   Vayshenker, I.
   Mirin, R. P.
   Shaw, M.
   Farr, W.
   Stern, J. A.
GP IEEE
TI Superconducting Nanowire Avalanche Photodetectors
SO 2013 IEEE PHOTONICS CONFERENCE (IPC)
SE IEEE Photonics Conference
LA English
DT Proceedings Paper
CT 26th IEEE Photonics Conference (IPC)
CY SEP 08-12, 2013
CL Bellevue, WA
SP IEEE, Amer Chem Soc, Multidisciplinary Digital Publishing Inst, IEEE Cloud Comp, LioniX
C1 [Nam, S.; Calkins, B.; Gerritts, T.; Harrington, S.; Lita, A. E.; Marsili, F.; Verma, V. B.; Vayshenker, I.; Mirin, R. P.] Natl Inst Stand & Technol, 325 Broadway, Boulder, CO 80305 USA.
   [Shaw, M.; Farr, W.; Stern, J. A.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
RP Nam, S (reprint author), Natl Inst Stand & Technol, 325 Broadway, Boulder, CO 80305 USA.
NR 2
TC 1
Z9 1
U1 0
U2 4
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2374-0140
BN 978-1-4577-1507-5
J9 IEEE PHOTON CONF
PY 2013
BP 366
EP 367
PG 2
WC Engineering, Electrical & Electronic; Optics
SC Engineering; Optics
GA BE2RE
UT WOS:000369918000185
ER

PT S
AU Gunapala, SD
   Ting, DZ
   Soibel, A
   Rafol, SB
   Khoshakhlagh, A
   Mumolo, JM
   Liu, JK
   Keo, SA
   Hill, CJ
AF Gunapala, S. D.
   Ting, D. Z.
   Soibel, A.
   Rafol, S. B.
   Khoshakhlagh, A.
   Mumolo, J. M.
   Liu, J. K.
   Keo, S. A.
   Hill, C. J.
GP IEEE
TI Modulation Transfer Function of Infrared Focal Plane Arrays
SO 2013 IEEE PHOTONICS CONFERENCE (IPC)
SE IEEE Photonics Conference
LA English
DT Proceedings Paper
CT 26th IEEE Photonics Conference (IPC)
CY SEP 08-12, 2013
CL Bellevue, WA
SP IEEE, Amer Chem Soc, Multidisciplinary Digital Publishing Inst, IEEE Cloud Comp, LioniX
C1 [Gunapala, S. D.; Ting, D. Z.; Soibel, A.; Rafol, S. B.; Khoshakhlagh, A.; Mumolo, J. M.; Liu, J. K.; Keo, S. A.; Hill, C. J.] CALTECH, Jet Prop Lab, Ctr Infrared Sensors, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
RP Gunapala, SD (reprint author), CALTECH, Jet Prop Lab, Ctr Infrared Sensors, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
NR 2
TC 0
Z9 0
U1 0
U2 3
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2374-0140
BN 978-1-4577-1507-5
J9 IEEE PHOTON CONF
PY 2013
BP 600
EP 601
PG 2
WC Engineering, Electrical & Electronic; Optics
SC Engineering; Optics
GA BE2RE
UT WOS:000369918000293
ER

PT S
AU Charisoulis, T
   Jamshidi-Roudbari, A
   Choi, NB
   Hatalis, M
   Lu, YJ
   Li, J
AF Charisoulis, Thomas
   Jamshidi-Roudbari, Abbas
   Choi, Nack-Bong
   Hatalis, Miltos
   Lu, Yijiang
   Li, Jing
GP IEEE
TI CNT Sensor arrays with P-i-N diodes
SO 2013 IEEE SENSORS
SE IEEE Sensors
LA English
DT Proceedings Paper
CT 12th IEEE Sensors Conference
CY NOV 03-06, 2013
CL Baltimore, MD
SP IEEE, IEEE Sensors Council
AB A novel active matrix array approach suitable for a compact multi-channel gas sensor platform is presented. Each sensor site utilizes carbon nanotubes (CNT) on top of a pair of interdigitated electrodes (IDEs) as the gas sensing element. The proposed active matrix sensor array utilizes an array of P-I-N diodes each connected in series with an IDE. The use of P-I-N diodes enables row and column addressing of each sensor thus significantly reducing the required wiring compared to individually addressed sensors. In this work, P-I-N diodes were implemented using either silicon-on insulator (SOI) or Low Temperature Poly-Silicon (LTPS) thin film technology thus validating that both wafer and glass based approaches can be used for the mass manufacture of proposed multi-channel sensor platforms. The functionality of 8x8 and 16x16 sensor arrays is proven with the help of a PEDOT:PSS cover. Data are also presented for the 8x8 arrays and the detection of ammonia (NH3) and chlorine (Cl2) vapor sources is demonstrated.
C1 [Charisoulis, Thomas; Jamshidi-Roudbari, Abbas; Choi, Nack-Bong; Hatalis, Miltos] Lehigh Univ, Sch Elect & Comp Engn, Bethlehem, PA 18015 USA.
   [Lu, Yijiang; Li, Jing] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
RP Charisoulis, T (reprint author), Lehigh Univ, Sch Elect & Comp Engn, Bethlehem, PA 18015 USA.
EM thomas@lehigh.edu; Jing.Li-1@nasa.gov
NR 5
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1930-0395
BN 978-1-4673-4642-9
J9 IEEE SENSOR
PY 2013
BP 1275
EP 1278
PG 4
WC Engineering, Electrical & Electronic; Remote Sensing
SC Engineering; Remote Sensing
GA BF0XP
UT WOS:000379846100307
ER

PT S
AU LaBarbera, MA
   Zorman, CA
   Scardelletti, MC
AF LaBarbera, Michael A.
   Zorman, Christian A.
   Scardelletti, Maximilian C.
GP IEEE
TI Long-Term Thermal Mechanical Stability of PECVD Amorphous Silicon
   Carbide Films for Harsh Environment Microelectromechanical Systems
SO 2013 IEEE SENSORS
SE IEEE Sensors
LA English
DT Proceedings Paper
CT 12th IEEE Sensors Conference
CY NOV 03-06, 2013
CL Baltimore, MD
SP IEEE, IEEE Sensors Council
ID THIN-FILMS
AB Amorphous silicon carbide (a-SiC) thin films were deposited at 450 degrees C by Plasma-Enhanced Chemical Vapor Deposition (PECVD) using silane and methane precursor gases. Films were deposited to a nominal 300nm thickness using a range of precursor gas flow rates, chamber pressures, and RF powers. For the conditions investigated, all films were deposited with high compressive stress (>= -1,000MPa). Films were then annealed for 10 hours at 550 degrees C residual stress measured periodically, with most films transforming to 300MPa - 1,000MPa tensile stress. Films were then subjected to thermal treatment for 50 hours at 500 degrees C to simulate prolonged microelectromechanical device operation at elevated temperatures. After an initial period, all film stresses stabilized to within 5% over 10 hours, with final stresses ranging from 170MPa compressive to 1,200MPa. Young's modulus was determined via nano-indentation and was found to be a consistent 211.4 +/- 20.37GPa for each recipe. This, combined with an observed distributed range of stabilized stresses, indicate a potential new application of a-SiC with constant modulus and stable residual stress for high temperature sensors.
C1 [LaBarbera, Michael A.; Zorman, Christian A.] Case Western Reserve Univ, Dept Elect Engn & Comp Sci, Cleveland, OH 44109 USA.
   [Scardelletti, Maximilian C.] NASA, Glenn Res Ctr Lewis Field, Cleveland, OH 44106 USA.
RP LaBarbera, MA (reprint author), Case Western Reserve Univ, Dept Elect Engn & Comp Sci, Cleveland, OH 44109 USA.
EM michael.labarbera@case.edu; christian.zorman@case.edu;
   maximilian.c.scardelletti@nasa.gov
NR 6
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 1930-0395
BN 978-1-4673-4642-9
J9 IEEE SENSOR
PY 2013
BP 1771
EP 1774
PG 4
WC Engineering, Electrical & Electronic; Remote Sensing
SC Engineering; Remote Sensing
GA BF0XP
UT WOS:000379846100430
ER

PT S
AU Saini, S
   Jin, HQ
   Jespersen, D
   Feng, HY
   Djomehri, J
   Arasin, W
   Hood, R
   Mehrotra, P
   Biswas, R
AF Saini, Subhash
   Jin, Haoqiang
   Jespersen, Dennis
   Feng, Huiyu
   Djomehri, Jahed
   Arasin, William
   Hood, Robert
   Mehrotra, Piyush
   Biswas, Rupak
GP IEEE
TI An Early Performance Evaluation of Many Integrated Core Architecture
   Based SGI Rackable Computing System
SO 2013 INTERNATIONAL CONFERENCE FOR HIGH PERFORMANCE COMPUTING,
   NETWORKING, STORAGE AND ANALYSIS (SC)
SE International Conference for High Performance Computing Networking
   Storage and Analysis
LA English
DT Proceedings Paper
CT International Conference for High Performance Computing, Networking,
   Storage and Analysis (SC)
CY NOV 17-22, 2013
CL Denver, CO
SP Assoc Comp Machinery, IEEE Comp Soc
DE Intel Xeon Phi; Intel MIC architecture; Intel Sandy Bridge processor;
   performance evaluation; benchmarking; CFD applications
AB Intel recently introduced the Xeon Phi coprocessor based on the Many Integrated Core architecture featuring 60 cores with a peak performance of 1.0 Tflop/s. NASA has deployed a 128-node SGI Rackable system where each node has two Intel Xeon E2670 8-core Sandy Bridge processors along with two Xeon Phi 5110P coprocessors. We have conducted an early performance evaluation of the Xeon Phi. We used microbenchmarks to measure the latency and bandwidth of memory and interconnect, I/O rates, and the performance of OpenMP directives and NWT functions. We also used OpenMP and NWT versions of the NAS Parallel Benchmarks along with two production CFD applications to test four programming modes: offload, processor native, coprocessor native and symmetric (processor plus coprocessor). In this paper we present preliminary results based on our performance evaluation of various aspects of a Phi-based system.
C1 [Saini, Subhash; Jin, Haoqiang; Jespersen, Dennis; Mehrotra, Piyush; Biswas, Rupak] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
   [Feng, Huiyu] SGI, Fremont, CA 94538 USA.
   [Djomehri, Jahed; Arasin, William; Hood, Robert] Comp Sci Corp, Moffett Field, CA 94035 USA.
RP Saini, S (reprint author), NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
EM subhash.saini@nasa.gov; haoqiang.jin@nasa.gov;
   dennis.jespersen@nasa.gov; hfeng@sgi.com; jahed.djomehri@nasa.gov;
   william.f.arasin@nasa.gov; robert.hood@nasa.gov;
   piyush.mehrotra@nasa.gov; rupak.biswas@nasa.gov
FU NASA [NNA07CA29C]
FX The authors are grateful to Matt Reilly of Institute for Defense
   Analyses for several valuable suggestions. Valuable support and help of
   Johnny Chang and John Hardman is gratefully acknowledged. Work by Jahed
   Djomehri, William Arasin, and Robert Hood, employees of CSC, was
   supported by NASA Contract No. NNA07CA29C.
NR 18
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2167-4329
BN 978-1-4503-2378-9
J9 INT CONF HIGH PERFOR
PY 2013
DI 10.1145/2503210.2503272
PG 12
WC Computer Science, Hardware & Architecture; Engineering, Electrical &
   Electronic
SC Computer Science; Engineering
GA BB7OY
UT WOS:000345856900095
ER

PT S
AU Weaver, GL
   Asmar, SW
   Oudrhiri, K
AF Weaver, Gregory L.
   Asmar, Sami W.
   Oudrhiri, Kamal
GP IEEE
TI GRAIL USOs; Another In-Flight Quartz Radiation Experiment
SO 2013 JOINT EUROPEAN FREQUENCY AND TIME FORUM & INTERNATIONAL FREQUENCY
   CONTROL SYMPOSIUM (EFTF/IFC)
SE Joint European Frequency and Time Forum and International Frequency
   Control Symposium
LA English
DT Proceedings Paper
CT Joint European Frequency and Time Forum / International Frequency
   Control Symposium (EFTF/IFC)
CY JUL 21-25, 2013
CL Prague, CZECH REPUBLIC
DE GRAIL; oscillator; space-weather; irradiation
AB The Gravity Recovery and Interior Laboratory (GRAIL) mission successfully ended in December, 2012 after an extended science phase of over 280 days mapping the gravitation field gradient of the Moon with a precision of better than 50 E-6 g's over the entire lunar surface. The mission was performed by two tandem flying spacecraft, both of which carried a Microwave Dual One-way Ranging (DOWR) instrument that together formed a highly precise relative measure of the distance between the two spacecraft as they orbited the Moon.
   The precision of the radio link maintained by the DOWR instruments was derived from the frequency stability of the ultra-stable oscillators (USOs) on-board each spacecraft. The opportunity to observe the USOs frequency throughout the GRAIL mission provides a record of not only the intrinsic performance of the oscillators, but their behavior during exposure to space conditions. We describe the effect to the frequency of each GRAIL USO, A and B, resulting from the March 7th, 2012 X5.4 level solar flare, just several days into GRAIL's science collection phase. We discuss the impact of this radiation exposure, and the asymmetric behavior of two USOs coincidentally perturbed by the same space-weather event.
C1 [Weaver, Gregory L.] Johns Hopkins Univ, Appl Phys Lab, Dept Space, Laurel, MD 20723 USA.
   [Asmar, Sami W.; Oudrhiri, Kamal] CALTECH, Radio Sci Syst Grp, Jet Propulsion Lab, Pasadena, CA 91125 USA.
RP Weaver, GL (reprint author), Johns Hopkins Univ, Appl Phys Lab, Dept Space, Laurel, MD 20723 USA.
EM gregory.weaver@jhuapl.edu
NR 6
TC 0
Z9 0
U1 0
U2 0
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
SN 2327-1914
BN 978-1-4799-0342-9
J9 JOINT CONF IEEE INT
PY 2013
BP 200
EP +
PG 2
WC Automation & Control Systems; Computer Science, Information Systems;
   Engineering, Electrical & Electronic
SC Automation & Control Systems; Computer Science; Engineering
GA BC0YR
UT WOS:000349844200052
ER

PT J
AU Wu, X
   Walker, JP
   Panciera, R
   Rudiger, C
   Das, NN
AF Wu, X.
   Walker, J. P.
   Panciera, R.
   Rudiger, C.
   Das, N. N.
BE Piantadosi, J
   Anderssen, RS
   Boland, J
TI Downscaling of coarse-resolution radiometer brightness temperature by
   high-resolution radar backscatter
SO 20TH INTERNATIONAL CONGRESS ON MODELLING AND SIMULATION (MODSIM2013)
LA English
DT Proceedings Paper
CT 20th International Congress on Modelling and Simulation (MODSIM)
CY DEC 01-06, 2013
CL Adelaide, AUSTRALIA
SP CSIRO, Univ S Australia, Ctr Ind & Appl Math, Australian Govt, Bur Meteorol, GOYDER Inst, Govt S Australia, Australian Math Soc, Australian Math Sci Inst, Simulat Australia, Australian & New Zealand Ind & Appl Math
DE Downscaling; Brightness temperature; Radar backscatter; SMAP; SMAPEx
ID SOIL-MOISTURE
AB Given the importance of soil moisture for hydrological applications, such as weather and flood forecasting, passive microwave remote sensing is a promising approach for retrieving soil moisture due to its high sensitivity to near-surface soil moisture, applicability to all weather conditions, direct relationship with the soil dielectric constant, and reduced effects from vegetation and roughness. However, passive microwave (radiometer) observations suffer from being relatively low spatial resolution, on the order of 36 km. It is proposed that this scale issue may be overcome by using active microwave (radar) observations, which have much higher resolution when using Synthetic Aperture Radar (SAR) techniques (<3km), and this is the approach being taken by NASA's Soil Moisture Active Passive (SMAP) mission, with a scheduled launch in late 2014. The rationale behind SMAP is to use the synergy between active and passive observations in a downscaling approach to overcome the individual limitations of each observation type, and ultimately provide a merged soil moisture data set at intermediate resolution (similar to 9 km).
   The objective of this study is to test the proposed baseline downscaling approach for the SMAP mission using airborne data, thus assessing its viability for future application to SMAP data. The approach is based on the hypothesis of a near-linear relationship between radiometer brightness temperature (Tb) and SAR backscatter (sigma), and has thus far received very limited testing. The experimental dataset used in this study was collected during the Soil Moisture Active Passive Experiment (SMAPEx) field campaigns over a study site in south-eastern Australia approximately 38km x 36km in size, equivalent to a SMAP radiometer pixel. This research focuses on the brightness temperature downscaling algorithm; according to the SMAP Algorithm Theoretical Basis Documents these downscaled brightness temperatures will subsequently be converted to soil moisture at fine resolution through the traditional passive microwave retrieval algorithm.
   The baseline downscaling algorithm was applied to high resolution data from SMAPEx, which include 1km resolution brightness temperature collected by the Polarimetric L-band Multibeam Radiometer (PLMR) and similar to 10m resolution backscatters collected by the Polarimetric L-band Imaging Synthetic aperture radar (PLIS). To minimize noise in the radar data and to approximate the SMAP radiometer/radar pixel ratios (36km Tb to 9km resolution using 3km sigma) the PLIS data were aggregated to 250m resolution, so as to downscale 1km Tb to 250m resolution, thus keeping the same ratio of radiometer/SAR spatial resolution as the SMAP mission. Results showed that the Root-Mean-Square Error (RMSE) in Tb downscaled at 100m resolution was around 10K at h-polarization and 8K at v-polarization over a cropping area. This RMSE was reduced to 9K and 7K respectively when downscaling to 250m resolution, due to a decreased spatial heterogeneity during averaging. It was also noted that results at v-polarization were slightly better than those at h-polarization, since the backscatter is more linearly related to Tb at v-polarization than Tb at h-polarization. The accuracy of the downscaling over grassland sites was improved by approximately 3K with respect to the cropping area. This was attributed to the more heterogeneous conditions in cropping areas, compared to the relatively uniform conditions in the grassland area. However, one limitation of this study was the availability of only three days of data for estimating the linearity between radar and radiometer observations.
C1 [Wu, X.; Walker, J. P.; Rudiger, C.] Monash Univ, Dept Civil Engn, Clayton, Vic 3800, Australia.
   [Panciera, R.] Cooperat Res Ctr Spatial Informat, Melbourne, Vic 3053, Australia.
   [Das, N. N.] CALTECH, Jet Prop Lab NASA, Pasadena, CA 91109 USA.
RP Wu, X (reprint author), Monash Univ, Dept Civil Engn, Clayton, Vic 3800, Australia.
EM xiaoling.wu@monash.edu
NR 10
TC 0
Z9 0
U1 0
U2 1
PU MODELLING & SIMULATION SOC AUSTRALIA & NEW ZEALAND INC
PI CHRISTCHURCH
PA MSSANZ, CHRISTCHURCH, 00000, NEW ZEALAND
BN 978-0-9872143-3-1
PY 2013
BP 3127
EP 3133
PG 7
WC Computer Science, Interdisciplinary Applications; Operations Research &
   Management Science; Mathematics, Interdisciplinary Applications
SC Computer Science; Operations Research & Management Science; Mathematics
GA BD0EH
UT WOS:000357105903023
ER

PT B
AU Schutte, P
   Goodrich, K
   Williams, R
AF Schutte, Paul
   Goodrich, Kenneth
   Williams, Ralph
BE Landry, SJ
TI Towards an Improved Pilot-Vehicle Interface for Highly Automated
   Aircraft: Evaluation of the Haptic Flight Control System
SO ADVANCES IN HUMAN ASPECTS OF AVIATION
SE Advances in Human Factors and Ergonomics Series
LA English
DT Article; Book Chapter
AB The control automation and interaction paradigm (e.g., manual, autopilot, flight management system) used on virtually all large highly automated aircraft has long been an exemplar of breakdowns in human factors and human-centered design. An alternative paradigm is the Haptic Flight Control System (HFCS) that is part of NASA Langley Research Center's Naturalistic Flight Deck Concept. The HFCS uses only stick and throttle for easily and intuitively controlling the actual flight of the aircraft without losing any of the efficiency and operational benefits of the current paradigm. Initial prototypes of the HFCS are being evaluated and this paper describes one such evaluation. In this evaluation we examined claims regarding improved situation awareness, appropriate workload, graceful degradation, and improved pilot acceptance.
   Twenty-four instrument-rated pilots were instructed to plan and fly four different flights in a fictitious airspace using a moderate fidelity desktop simulation. Three different flight control paradigms were tested: Manual control, Full Automation control, and a simplified version of the HFCS. Dependent variables included both subjective (questionnaire) and objective (SAGAT) measures of situation awareness, workload (NASA-TLX), secondary task performance, time to recognize automation failures, and pilot preference (questionnaire).
   The results showed a statistically significant advantage for the HFCS in a number of measures. Results that were not statistically significant still favored the HFCS. The results suggest that the HFCS does offer an attractive and viable alternative to the tactical components of today's FMS/autopilot control system. The paper describes further studies that are planned to continue to evaluate the HFCS.
C1 [Schutte, Paul; Goodrich, Kenneth] NASA, Langley Res Ctr, Hampton, VA 23681 USA.
   [Williams, Ralph] Analyt Mech Associates Inc, Hampton, VA 23666 USA.
RP Schutte, P (reprint author), NASA, Langley Res Ctr, Hampton, VA 23681 USA.
EM Paul.C.Schutte@NASA.gov
NR 6
TC 4
Z9 4
U1 0
U2 0
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-1-4398-7117-1; 978-1-4398-7116-4
J9 ADV HUM FACT ERG SER
JI ADV. HUMAN FACT. ERG. SER
PY 2013
BP 3
EP 12
PG 10
WC Ergonomics; Transportation Science & Technology
SC Engineering; Transportation
GA BC3OY
UT WOS:000351775400002
ER

PT B
AU Koteskey, RW
   Wu, SC
   Battiste, V
   Wenzel, EM
   Lachter, J
   Begault, DR
   Nguyen, J
   Politowicz, MS
   Johnson, WW
AF Koteskey, Robert W.
   Wu, Shu-Chieh
   Battiste, Vernol
   Wenzel, Elizabeth M.
   Lachter, Joel
   Begault, Durand R.
   Nguyen, Jimmy
   Politowicz, Michael S.
   Johnson, Walter W.
BE Landry, SJ
TI Enhanced Audio for NextGen Flight Decks
SO ADVANCES IN HUMAN ASPECTS OF AVIATION
SE Advances in Human Factors and Ergonomics Series
LA English
DT Article; Book Chapter
DE NextGen; aurally enhanced flight deck; CDTI; synthetic voice
ID DISPLAYS
AB Implementation of the Next Generation Air Transportation System (NextGen) will require shifting more roles to the flight deck. The proposed tools and displays for facilitating these added tasks primarily deliver information through visual means. This saturates an already loaded channel while perhaps underutilizing the auditory modality. This paper describes audio enhancements we have developed to compliment NextGen tools and displays, and reports on preliminary observations from a simulation incorporating these enhancements. Pilots were generally receptive to the broad concept, but opinions diverged regarding specific features, suggesting potential for this strategy, and that user defined settings may be important.
C1 [Koteskey, Robert W.; Wu, Shu-Chieh; Battiste, Vernol; Wenzel, Elizabeth M.; Lachter, Joel; Begault, Durand R.; Johnson, Walter W.] NASA, Ames Res Ctr, Washington, DC 20546 USA.
   [Koteskey, Robert W.; Wu, Shu-Chieh; Battiste, Vernol; Lachter, Joel] San Jose State Univ, San Jose, CA 95192 USA.
   [Nguyen, Jimmy] Calif State Univ Long Beach, Long Beach, CA 90840 USA.
   [Politowicz, Michael S.] Univ Michigan, Ann Arbor, MI 48109 USA.
RP Koteskey, RW (reprint author), NASA, Ames Res Ctr, Washington, DC 20546 USA.
EM Robert.W.Koteskey@NASA.gov
NR 13
TC 0
Z9 0
U1 0
U2 0
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-1-4398-7117-1; 978-1-4398-7116-4
J9 ADV HUM FACT ERG SER
JI ADV. HUMAN FACT. ERG. SER
PY 2013
BP 33
EP 42
PG 10
WC Ergonomics; Transportation Science & Technology
SC Engineering; Transportation
GA BC3OY
UT WOS:000351775400005
ER

PT B
AU Morales, GA
   Higham, T
   Ho, V
   Vu, KPL
   Strybel, TZ
   Battiste, V
   Lachter, J
   Johnson, W
AF Morales, Gregory A.
   Higham, Tiana
   Ho, Vyha
   Vu, Kim-Phuong L.
   Strybel, Thomas Z.
   Battiste, Vernol
   Lachter, Joel
   Johnson, Walter
BE Landry, SJ
TI Effectiveness of 3D Cockpit Displays of Weather on Pilot Performance in
   NextGen Airspace
SO ADVANCES IN HUMAN ASPECTS OF AVIATION
SE Advances in Human Factors and Ergonomics Series
LA English
DT Article; Book Chapter
DE 3D Display; NEXRAD; NextGen; Weather avoidance
AB The Next Generation Air Transportation System (NextGen) is a continuing program to improve safety and efficiency in the National Airspace System. Weather and workload are two major challenges that must be addressed to meet the goals of NextGen. In this simulation, pilots flew in three plausible concepts of operation for separation assurance, using two types of weather displays (current day radar and 3D NEXRAD). Performance data of pilots maneuvering past weather is presented. When using NEXRAD pilots began maneuvers to avoid weather earlier, passed weather faster, and required fewer flight plan changes compared to conditions using current day radar. As such, NEXRAD may be a more efficient tool for strategic weather avoidance. Weather avoidance performance was also affected by operating concept for separation assurance.
C1 [Morales, Gregory A.; Higham, Tiana; Ho, Vyha; Vu, Kim-Phuong L.; Strybel, Thomas Z.] Calif State Univ Long Beach, Long Beach, CA 90840 USA.
   [Battiste, Vernol; Lachter, Joel; Johnson, Walter] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
RP Morales, GA (reprint author), Calif State Univ Long Beach, Long Beach, CA 90840 USA.
EM gregory.morales1@gmail.com
NR 18
TC 0
Z9 0
U1 0
U2 0
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-1-4398-7117-1; 978-1-4398-7116-4
J9 ADV HUM FACT ERG SER
JI ADV. HUMAN FACT. ERG. SER
PY 2013
BP 53
EP 62
PG 10
WC Ergonomics; Transportation Science & Technology
SC Engineering; Transportation
GA BC3OY
UT WOS:000351775400007
ER

PT B
AU Thipphavong, J
   Swenson, H
   Martin, L
   Lin, P
   Nguyen, J
AF Thipphavong, Jane
   Swenson, Harry
   Martin, Lynne
   Lin, Paul
   Nguyen, Jimmy
BE Landry, SJ
TI Evaluation of the Terminal Area Precision Scheduling and Spacing System
   for Near-Term NAS Application
SO ADVANCES IN HUMAN ASPECTS OF AVIATION
SE Advances in Human Factors and Ergonomics Series
LA English
DT Article; Book Chapter
DE terminal metering; arrival scheduling; controller decision support
   tools; air traffic control automation
AB NASA has developed a capability for terminal area precision scheduling and spacing (TAPSS) to provide higher capacity and more efficiently manage arrivals during peak demand periods. This advanced technology is NASA's vision for the NextGen terminal metering capability. A set of human-in-the-loop experiments was conducted to evaluate the performance of the TAPSS system for near-term implementation. The experiments evaluated the TAPSS system under the current terminal routing infrastructure to validate operational feasibility. A second goal of the study was to measure the benefit of the Center and TRACON advisory tools to help prioritize the requirements for controller radar display enhancements. Simulation results indicate that using the TAPSS system provides benefits under current operations, supporting a 10% increase in airport throughput. Enhancements to Center decision support tools had limited impact on improving the efficiency of terminal operations, but did provide more fuel-efficient advisories to achieve scheduling conformance within 20 seconds. The TRACON controller decision support tools were found to provide the most benefit, by improving the precision in schedule conformance to within 20 seconds, reducing the number of arrivals having lateral path deviations by 50% and lowering subjective controller workload. Overall, the TAPSS system was found to successfully develop an achievable terminal arrival metering plan that was sustainable under heavy traffic demand levels and reduce the complexity of terminal operations when coupled with the use of the terminal controller advisory tools.
C1 [Thipphavong, Jane; Swenson, Harry] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
   [Martin, Lynne] San Jose State Univ, NASA, Ames Res Ctr, Moffett Field, CA USA.
   [Lin, Paul; Nguyen, Jimmy] Optimal Synth Inc, Los Altos, CA USA.
RP Thipphavong, J (reprint author), NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
EM Jane.Thipphavong@nasa.gov; Harry.N.Swenson@nasa.gov;
   Lynne.Martin@nasa.gov; PLin@optisyn.com; JNguyen@optisyn.com
NR 16
TC 0
Z9 0
U1 0
U2 0
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-1-4398-7117-1; 978-1-4398-7116-4
J9 ADV HUM FACT ERG SER
JI ADV. HUMAN FACT. ERG. SER
PY 2013
BP 75
EP 87
PG 13
WC Ergonomics; Transportation Science & Technology
SC Engineering; Transportation
GA BC3OY
UT WOS:000351775400009
ER

PT B
AU Cabrall, C
   Callantine, T
   Kupfer, M
   Martin, L
   Mercer, J
AF Cabrall, Christopher
   Callantine, Todd
   Kupfer, Michael
   Martin, Lynne
   Mercer, Joey
BE Landry, SJ
TI Controller-Managed Spacing within Mixed-Equipage Arrival Operations
   Involving Flight-Deck Interval Management
SO ADVANCES IN HUMAN ASPECTS OF AVIATION
SE Advances in Human Factors and Ergonomics Series
LA English
DT Article; Book Chapter
DE aircraft arrival management; air traffic controller tools; flight-deck
   interval management; scheduling
AB New NASA research focuses on integrated arrival operations along efficient descent profiles using advanced scheduling automation, tools to aid air traffic controllers, and airborne precision-spacing automation to enable fuel-efficient arrivals at busy airports during peak traffic periods. This paper describes an initial human-in-the-loop study and presents results that address human factors of controller tools and operational procedures for managing a mix of scheduled arrivals in which some aircraft use Flight-Deck Interval Management (FIM) automation to achieve precise spacing behind their lead aircraft. The results are consistent with prior research and suggest potential enhancements from the ground-side perspective to support mixed-FIM-equipage arrival operations.
C1 [Cabrall, Christopher; Callantine, Todd; Kupfer, Michael; Martin, Lynne; Mercer, Joey] San Jose State Univ, NASA, Ames Res Ctr, Moffett Field, CA 94034 USA.
RP Cabrall, C (reprint author), San Jose State Univ, NASA, Ames Res Ctr, Moffett Field, CA 94034 USA.
EM Christopher.D.Cabrall@nasa.gov
NR 6
TC 0
Z9 0
U1 0
U2 0
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-1-4398-7117-1; 978-1-4398-7116-4
J9 ADV HUM FACT ERG SER
JI ADV. HUMAN FACT. ERG. SER
PY 2013
BP 98
EP 107
PG 10
WC Ergonomics; Transportation Science & Technology
SC Engineering; Transportation
GA BC3OY
UT WOS:000351775400011
ER

PT B
AU Verma, S
   Tang, HB
   Ballinger, D
   Kozon, T
   Farrahi, A
AF Verma, Savita
   Tang, Huabin
   Ballinger, Debbi
   Kozon, Thomas
   Farrahi, Amir
BE Landry, SJ
TI Initial Evaluation of a Conflict Detection Tool in the Terminal Area
SO ADVANCES IN HUMAN ASPECTS OF AVIATION
SE Advances in Human Factors and Ergonomics Series
LA English
DT Article; Book Chapter
DE conflict detection; terminal area; conflict alert
ID AIRSPACE
AB A conflict detection and resolution tool, Terminal Tactical Separation Assurance Flight Environment (T-TSAFE), is being developed to address the inadequacies of the legacy system in the field, Conflict Alert. Since altitude intent information improves T-TSAFE's conflict detection accuracy, this initial human-in-the-loop test of the tool had three T-TSAFE conditions: altitude clearances entered into the tool by the controllers via keyboard, altitude clearances entered into the tool from the flight deck via Automatic Dependant Surveillance-Broadcast (ADS-B), and no altitude entries. Entering altitude clearances into T-TSAFE was expected to reduce false alerts but did not, possibly due to the short duration of the runs. The test conditions also did not significantly impact the duration of the alert or the controller's response time to the alert. The subjective data showed that controllers favored T-TSAFE over Conflict Alert as used in the field due to the ease of use and perceived reduction in false alerts.
C1 [Verma, Savita; Tang, Huabin; Ballinger, Debbi] NASA, Ames Res Ctr, Mountain View, CA 94035 USA.
   [Kozon, Thomas; Farrahi, Amir] NASA, Ames Res Ctr, UARC, Mountain View, CA USA.
RP Verma, S (reprint author), NASA, Ames Res Ctr, Mountain View, CA 94035 USA.
NR 11
TC 0
Z9 0
U1 0
U2 0
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-1-4398-7117-1; 978-1-4398-7116-4
J9 ADV HUM FACT ERG SER
JI ADV. HUMAN FACT. ERG. SER
PY 2013
BP 118
EP 128
PG 11
WC Ergonomics; Transportation Science & Technology
SC Engineering; Transportation
GA BC3OY
UT WOS:000351775400013
ER

PT B
AU Verma, S
   Ballinger, D
   Subramanian, S
   Kozon, T
AF Verma, Savita
   Ballinger, Debbi
   Subramanian, Shobana
   Kozon, Thomas
BE Landry, SJ
TI Comparison of Procedures for Dual and Triple Closely Spaced Parallel
   Runways
SO ADVANCES IN HUMAN ASPECTS OF AVIATION
SE Advances in Human Factors and Ergonomics Series
LA English
DT Article; Book Chapter
AB A human-in-the-loop high fidelity flight simulation experiment was conducted, which investigated and compared breakout procedures for Very Closely Spaced Parallel Approaches (VCSPA) with two and three runways. To understand the feasibility, usability and human factors of two and three runway VCSPA, data were collected and analyzed on the dependent variables of breakout cross track error and pilot workload. Independent variables included number of runways, cause of breakout and location of breakout. Results indicated larger cross track error and higher workload using three runways as compared to 2-runway operations. Significant interaction effects involving breakout cause and breakout location were also observed. Across all conditions, cross track error values showed high levels of breakout trajectory accuracy and pilot workload remained manageable. Results suggest possible avenues of future adaptation for adopting these procedures (e.g., pilot training), while also showing potential promise of the concept.
C1 [Verma, Savita; Ballinger, Debbi] NASA, Ames Res Ctr, Mountain View, CA 94035 USA.
   [Subramanian, Shobana] NASA, Ames Res Ctr, Dell Perot, Moffett Field, CA USA.
   [Kozon, Thomas] NASA, Ames Res Ctr, UARC, Moffett Field, CA USA.
RP Verma, S (reprint author), NASA, Ames Res Ctr, Mountain View, CA 94035 USA.
NR 7
TC 0
Z9 0
U1 0
U2 0
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-1-4398-7117-1; 978-1-4398-7116-4
J9 ADV HUM FACT ERG SER
JI ADV. HUMAN FACT. ERG. SER
PY 2013
BP 139
EP 149
PG 11
WC Ergonomics; Transportation Science & Technology
SC Engineering; Transportation
GA BC3OY
UT WOS:000351775400015
ER

PT B
AU Lim, V
   Johnson, W
AF Lim, Veranika
   Johnson, Walter
BE Landry, SJ
TI Dimensionality Effects on Weather Avoidance
SO ADVANCES IN HUMAN ASPECTS OF AVIATION
SE Advances in Human Factors and Ergonomics Series
LA English
DT Article; Book Chapter
DE human-computer interaction; dimensionality; human performance
AB The effects of different display perspectives on pilot performance in weather and traffic avoidance tasks were evaluated using a 3 (display format: 2D toggle display, 3D toggle display and a 3D flexible display with a continuously manipulable viewpoint) x 2 (weather phenomena: convection and turbulence potential) within subject experiment. Results showed efficiency and situation awareness advantages when using a 2D toggle display. However, the 3D display with a continuously manipulable viewpoint performed similarly, and was superior to the 2D toggle display for safety. Additionally, different weather seemed to be best supported by different display formats and pilots were most conservative in convective weather conditions. This study provides guidance on ways to display weather and traffic information in order to support pilots' safe navigation around weather hazards.
C1 [Lim, Veranika] Leiden Univ, Leiden, Netherlands.
   [Johnson, Walter] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
RP Lim, V (reprint author), Leiden Univ, Leiden, Netherlands.
EM Veranika.Lim@gmail.com; Walter.Johnson@nasa.gov
NR 13
TC 0
Z9 0
U1 0
U2 0
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-1-4398-7117-1; 978-1-4398-7116-4
J9 ADV HUM FACT ERG SER
JI ADV. HUMAN FACT. ERG. SER
PY 2013
BP 183
EP 192
PG 10
WC Ergonomics; Transportation Science & Technology
SC Engineering; Transportation
GA BC3OY
UT WOS:000351775400019
ER

PT B
AU Ellis, KKE
   Bailey, RE
   Arthur, JJ
   Latorella, KA
   Kramer, LJ
   Shelton, KJ
   Norman, RM
   Prinzel, LJ
AF Ellis, Kyle K. E.
   Bailey, Randall E.
   Arthur, J. J. (Trey), III
   Latorella, Kara A.
   Kramer, Lynda J.
   Shelton, Kevin J.
   Norman, Robert M.
   Prinzel, Lance J.
BE Landry, SJ
TI Quantifying Pilot Visual Attention in Low Visibility Terminal Operations
SO ADVANCES IN HUMAN ASPECTS OF AVIATION
SE Advances in Human Factors and Ergonomics Series
LA English
DT Article; Book Chapter
DE eye tracking; flight deck; NextGen; human machine interface; aviation
AB Quantifying pilot visual behavior allows researchers to determine not only where a pilot is looking and when, but holds implications for specific behavioral tracking when these data are coupled with flight technical performance. Remote eye tracking systems have been integrated into simulators at NASA Langley with effectively no impact on the pilot environment. This paper discusses the installation and use of a remote eye tracking system. The data collection techniques from a complex human-in-the-loop (HITL) research experiment are discussed; especially, the data reduction algorithms and logic to transform raw eye tracking data into quantified visual behavior metrics, and analysis methods to interpret visual behavior. The findings suggest superior performance for Head-Up Display (HUD) and improved attentional behavior for Head-Down Display (HDD) implementations of Synthetic Vision System (SVS) technologies for low visibility terminal area operations.
C1 [Ellis, Kyle K. E.; Bailey, Randall E.; Arthur, J. J. (Trey), III; Latorella, Kara A.; Kramer, Lynda J.; Shelton, Kevin J.; Norman, Robert M.; Prinzel, Lance J.] NASA, Langley Res Ctr, Hampton, VA 23665 USA.
RP Ellis, KKE (reprint author), NASA, Langley Res Ctr, Hampton, VA 23665 USA.
EM Kyle.Ellis@NASA.GOV
NR 8
TC 0
Z9 0
U1 0
U2 0
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-1-4398-7117-1; 978-1-4398-7116-4
J9 ADV HUM FACT ERG SER
JI ADV. HUMAN FACT. ERG. SER
PY 2013
BP 193
EP 203
PG 11
WC Ergonomics; Transportation Science & Technology
SC Engineering; Transportation
GA BC3OY
UT WOS:000351775400020
ER

PT B
AU Bakowski, DL
   Foyle, DC
   Hooey, BL
   Meyer, GR
   Wolter, CA
AF Bakowski, Deborah L.
   Foyle, David C.
   Hooey, Becky L.
   Meyer, Glenn R.
   Wolter, Cynthia A.
BE Landry, SJ
TI DataComm in Flight Deck Surface Trajectory-Based Operations
SO ADVANCES IN HUMAN ASPECTS OF AVIATION
SE Advances in Human Factors and Ergonomics Series
LA English
DT Article; Book Chapter
DE NextGen; STBO; surface operations; taxi; displays; DataComm
AB The purpose of this pilot-in-the-loop aircraft taxi simulation was to evaluate a NextGen concept for surface trajectory-based operations (STBO) in which air traffic control (ATC) issued taxi clearances with a required time of arrival (RTA) by Data Communications (DataComm). Flight deck avionics, driven by an error-nulling algorithm, displayed the speed needed to meet the RTA. To ensure robustness of the algorithm, the ability of 10 two-pilot crews to meet the RTA was tested in nine experimental trials representing a range of realistic conditions including a taxi route change, an RTA change, a departure clearance change, and a crossing traffic hold scenario. In some trials, these DataComm taxi clearances or clearance modifications were accompanied by 'preview' information, in which the airport map display showed a preview of the proposed route changes, including the necessary speed to meet the RTA. Overall, the results of this study show that with the aid of the RTA speed algorithm, pilots were able to meet their RTAs with very little time error in all of the robustness-testing scenarios. Results indicated that when taxi clearance changes were issued by DataComm only, pilots required longer notification distances than with voice communication. However, when the DataComm was accompanied by graphical preview, the notification distance required by pilots was equivalent to that for voice.
C1 [Bakowski, Deborah L.; Hooey, Becky L.; Wolter, Cynthia A.] San Jose State Univ, NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
   [Foyle, David C.] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
   [Meyer, Glenn R.] Fed Govt, Dell Serv, Moffett Field, CA USA.
RP Bakowski, DL (reprint author), San Jose State Univ, NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
EM debi.bakowski@nasa.gov
NR 6
TC 0
Z9 0
U1 0
U2 0
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-1-4398-7117-1; 978-1-4398-7116-4
J9 ADV HUM FACT ERG SER
JI ADV. HUMAN FACT. ERG. SER
PY 2013
BP 259
EP 268
PG 10
WC Ergonomics; Transportation Science & Technology
SC Engineering; Transportation
GA BC3OY
UT WOS:000351775400026
ER

PT B
AU Strater, LD
   Holbrook, J
   Beard, T
   Cuevas, H
   Endsley, M
AF Strater, Laura D.
   Holbrook, Jon
   Beard, Tina
   Cuevas, Haydee
   Endsley, Mica
BE Landry, SJ
TI An Initial Investigation of the Impact of Operator-Automation Goal
   Divergence in the Tower
SO ADVANCES IN HUMAN ASPECTS OF AVIATION
SE Advances in Human Factors and Ergonomics Series
LA English
DT Article; Book Chapter
DE goal divergence; automation; situation awareness; NextGen
AB The overall goal of the Next Generation (NextGen) Air Transportation System is to significantly increase the safety, security, capacity, efficiency, and environmental compatibility of air transportation operations. To achieve this goal, we must consider how the introduction of increased automation under NextGen will impact the human operators working with these systems. Toward this end, we report on a study that evaluated the utility of two airport surface operations decision support systems, one that provides recommendations in close compliance with current operator goals, and a second that addresses critical NextGen goals, but provides recommendations based on factors outside the controller's current decision model. Findings offer initial insights on the impact of operator-automation goal divergence on operator situation awareness.
C1 [Strater, Laura D.; Cuevas, Haydee; Endsley, Mica] SA Technol Inc, Marietta, GA 30066 USA.
   [Holbrook, Jon] San Jose State Univ, San Jose, CA 95192 USA.
   [Beard, Tina] NASA, Ames Res Ctr, Mountain View, CA 94043 USA.
RP Strater, LD (reprint author), SA Technol Inc, Marietta, GA 30066 USA.
EM laura@satechnologies.com
NR 10
TC 0
Z9 0
U1 0
U2 0
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-1-4398-7117-1; 978-1-4398-7116-4
J9 ADV HUM FACT ERG SER
JI ADV. HUMAN FACT. ERG. SER
PY 2013
BP 269
EP 278
PG 10
WC Ergonomics; Transportation Science & Technology
SC Engineering; Transportation
GA BC3OY
UT WOS:000351775400027
ER

PT B
AU Kenny, C
   Fern, L
AF Kenny, Caitlin
   Fern, Lisa
BE Landry, SJ
TI Varying Levels of Automation on UAS Operator Responses to Traffic
   Resolution Advisories in Civil Airspace
SO ADVANCES IN HUMAN ASPECTS OF AVIATION
SE Advances in Human Factors and Ergonomics Series
LA English
DT Article; Book Chapter
DE unmanned systems; collision avoidance; automation
AB Continuing demand for the use of Unmanned Aircraft Systems (UAS) has put increasing pressure on operations in civil airspace. The need to fly UAS in the National Airspace System (NAS) in order to perform missions vital to national security and defense, emergency management, and science is increasing at a rapid pace. In order to ensure safe operations in the NAS, operators of unmanned aircraft, like those of manned aircraft, may be required to maintain separation assurance and avoid loss of separation with other aircraft while performing their mission tasks. This experiment investigated the effects of varying levels of automation on UAS operator performance and workload while responding to conflict resolution instructions provided by the Tactical Collision Avoidance System II (TCAS II) during a UAS mission in high-density airspace. The purpose of this study was not to investigate the safety of using TCAS II on UAS, but rather to examine the effect of automation on the ability of operators to respond to traffic collision alerts. Six licensed pilots were recruited to act as UAS operators for this study. Operators were instructed to follow a specified mission flight path, while maintaining radio contact with Air Traffic Control and responding to TCAS II resolution advisories. Operators flew four, 45 minute, experimental missions with four different levels of automation: Manual, Knobs, Management by Exception, and Fully Automated. All missions included TCAS II Resolution Advisories (RAs) that required operator attention and rerouting. Operator compliance and reaction time to RAs was measured, and post-run NASA-TLX ratings were collected to measure workload. Results showed significantly higher compliance rates, faster responses to TCAS II alerts, as well as less preemptive operator actions when higher levels of automation are implemented. Physical and Temporal ratings of workload were significantly higher in the Manual condition than in the Management by Exception and Fully Automated conditions.
C1 [Kenny, Caitlin; Fern, Lisa] San Jose State Univ, NASA, Ames Res Ctr, San Jose, CA 95192 USA.
RP Kenny, C (reprint author), San Jose State Univ, NASA, Ames Res Ctr, San Jose, CA 95192 USA.
EM Caitlin.A.Kenny@NASA.Gov
NR 9
TC 0
Z9 0
U1 1
U2 1
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-1-4398-7117-1; 978-1-4398-7116-4
J9 ADV HUM FACT ERG SER
JI ADV. HUMAN FACT. ERG. SER
PY 2013
BP 279
EP 288
PG 10
WC Ergonomics; Transportation Science & Technology
SC Engineering; Transportation
GA BC3OY
UT WOS:000351775400028
ER

PT B
AU Kraut, JM
   Quinonez, T
   Wu, SC
   Koteskey, R
   Johnson, W
   Battiste, V
AF Kraut, Joshua M.
   Quinonez, Thomas
   Wu, Shu-Chieh
   Koteskey, Robert
   Johnson, Walter
   Battiste, Vernol
BE Landry, SJ
TI StormGen: A Proposed Solution to Weather Simulation in NextGen Research
SO ADVANCES IN HUMAN ASPECTS OF AVIATION
SE Advances in Human Factors and Ergonomics Series
LA English
DT Article; Book Chapter
DE NextGen; aviation; weather; simulation; storm model
AB Next Generation Air Transportation System (NextGen) concepts demand that both predicted and observed weather data are assimilated into air traffic management decision making. Consequently, research that evaluates concepts concerning weather decision making in NextGen requires the use of these weather data in the simulation environments. Current sources of real-world 3D convective weather data are often sparse, leave large coverage gaps, and are not constructed to meet specific research and concept evaluation requirements. As a result, there is a strong need for a simple and versatile tool that can be used for generating tailored, yet realistic weather for simulation-based research. StormGen, the software tool showcased in this paper, has been designed to produce convective weather systems for use in NextGen airspace simulations. StormGen provides a graphical user interface for the construction and placement of storm cells anywhere in a simulated contiguous United States airspace. StormGen functions support morphing of storm cells between different sizes, shapes, altitudes, positions, and intensities over time. The produced weather objects can be exported in multiple formats for use by other simulation components, such as the Multi Aircraft Control System (MACS), the Cockpit Situation Display (CSD), and out-the-window flight simulator views. MACS is an emulation and simulation program which provides a small to large scale airspace environment, and air traffic controller (ATC) display, for current and future air traffic operations in the National Airspace System (NAS). CSD is a 2D and 3D volumetric multifunction interface designed to provide flight decks with a 4D depiction of the interrelationships between surrounding traffic, weather, and terrain within the proximate airspace. Both MACS and CSD are able to utilize the dynamically updated weather delivered by StormGen to display 2D weather information, while CSD is also able to display the 3D weather objects created by StormGen, either in 3D perspective views, or by simulating the 2D scans returned by a simulated airborne radar application. The resolution at which the dynamic weather is updated can be determined by the StormGen software, or the simulation environments displaying the weather information. Thus, it can support six-minute display updates similar to Nexrad, or the virtually continuous display updates found with airborne radars. Finally, depending on the scope and purpose of the simulation environment, the exported weather objects can be used to integrate and simulate the display of predicted (forecast) weather information. This capability is important for the development and evaluation of technologies proposed to utilize such predicted information. There are multiple proposed and planned improvements to StormGen, which would improve the realism of generated weather objects. For example, StormGen presently has a simplistic wind capability that is reflected in the temporal movement of storm cells. Ideally, the editor would support the creation and exporting of wind fields. It would also be advantageous to use publicly available images from ground-based weather radar for the creation of storm systems in StormGen. We envision StormGen to be a continually evolving tool for generating convective weather systems for simulation research in NextGen environments.
C1 [Kraut, Joshua M.; Wu, Shu-Chieh; Koteskey, Robert; Battiste, Vernol] San Jose State Univ, San Jose, CA 95192 USA.
   [Quinonez, Thomas] Dell Serv Fed Govt, Moffett Field, CA USA.
   [Johnson, Walter] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
RP Kraut, JM (reprint author), San Jose State Univ, San Jose, CA 95192 USA.
EM KrautJosh@gmail.com
NR 1
TC 0
Z9 0
U1 0
U2 0
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-1-4398-7117-1; 978-1-4398-7116-4
J9 ADV HUM FACT ERG SER
JI ADV. HUMAN FACT. ERG. SER
PY 2013
BP 331
EP 340
PG 10
WC Ergonomics; Transportation Science & Technology
SC Engineering; Transportation
GA BC3OY
UT WOS:000351775400033
ER

PT B
AU Mosier, KL
   Fischer, U
   Orasanu, J
AF Mosier, Kathleen L.
   Fischer, Ute
   Orasanu, Judith
CA HART Grp
BE Landry, SJ
TI Expertise, Cognition, and CRM Issues in NextGen Automation Use
SO ADVANCES IN HUMAN ASPECTS OF AVIATION
SE Advances in Human Factors and Ergonomics Series
LA English
DT Article; Book Chapter
DE expertise; human-automation interaction; decision making
ID EYE-TRACKING; FLIGHT DECKS; PERFORMANCE; MODE; POWERFUL; COCKPIT;
   DRIVEN; BIAS
AB The aviation NextGen environment will be substantially different from the current National Airspace (NAS) operations. More and more sophisticated automation will enable innovations such as trajectory-based flight plans with precision paths from take-off to landing, aircraft self-separation and traffic avoidance, electronic flight bags, datalink communications, all-weather operations on very closely-spaced parallel runways (VCSPR). Flight crews will be required to interact proficiently with new automated systems and engage them for the flying tasks. Increasingly complex automated systems, however, will pose formidable challenges to crew decision making and resource management. System design and crew training will need to be mindful to the capabilities and limitations of human cognition and decision making to ensure safe operations in the NextGen airspace. In this chapter we describe what experienced crews and automation bring to the decision process in NextGen; define challenges and impediments to cognition, decision making and human automation interaction; and present guidelines for system design and crew training.
C1 [Mosier, Kathleen L.] San Francisco State Univ, San Francisco, CA 94132 USA.
   [Fischer, Ute] Georgia Inst Technol, Atlanta, GA 30332 USA.
   [Orasanu, Judith] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
RP Mosier, KL (reprint author), San Francisco State Univ, San Francisco, CA 94132 USA.
EM kmosier@sfsu.edu
NR 48
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PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-1-4398-7117-1; 978-1-4398-7116-4
J9 ADV HUM FACT ERG SER
JI ADV. HUMAN FACT. ERG. SER
PY 2013
BP 361
EP 372
PG 12
WC Ergonomics; Transportation Science & Technology
SC Engineering; Transportation
GA BC3OY
UT WOS:000351775400036
ER

PT B
AU Gore, BF
   Hooey, BL
   Mahlstedt, EA
   Foyle, DC
AF Gore, Brian F.
   Hooey, Becky L.
   Mahlstedt, Eric A.
   Foyle, David C.
BE Landry, SJ
TI Extending Validated Human Performance Models to Evaluate NextGen
   Concepts
SO ADVANCES IN HUMAN ASPECTS OF AVIATION
SE Advances in Human Factors and Ergonomics Series
LA English
DT Article; Book Chapter
DE NextGen CSPO; MIDAS v5; Human Performance Model
AB To meet the expected increases in air traffic demands, the National Aeronautics and Space Administration (NASA) and the Federal Aviation Administration (FAA) are researching and developing Next Generation Air Transportation System (NextGen) concepts. NextGen will require substantial increases to the data available to pilots on the flight deck (e.g., wake projections) to support more precise and closely coordinated operations (e.g., closely spaced parallel operations, CSPOs). These NextGen operations, along with the pilots' roles and responsibilities, must be designed with consideration of the pilots' capabilities. Failure to do so will leave the pilots, and thus the entire aviation system, vulnerable to error. A validated Man-machine Integration Design and Analysis System (MIDAS) v5 model was extended to evaluate changes to flight deck and controller roles and responsibilities in NextGen approach and land operations. Compared to conditions when the controllers are responsible for separation on descent to land phase of flight, the output from these model predictions suggest that the flight deck response time to detect the lead aircraft blunder will decrease, pilot scans to the navigation display will increase, and workload will increase.
C1 [Gore, Brian F.; Hooey, Becky L.; Mahlstedt, Eric A.] San Jose State Univ, NASA, Ames Res Ctr, San Jose, CA 95192 USA.
   [Foyle, David C.] Human Syst Integrat Div, Moffett Field, CA 94035 USA.
RP Gore, BF (reprint author), San Jose State Univ, NASA, Ames Res Ctr, San Jose, CA 95192 USA.
EM Brian.F.Gore@nasa.gov; Becky.L.Hooey@nasa.gov; Eric.Mahlstedt@nasa.gov;
   David.C.Foyle@nasa.gov
NR 11
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PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-1-4398-7117-1; 978-1-4398-7116-4
J9 ADV HUM FACT ERG SER
JI ADV. HUMAN FACT. ERG. SER
PY 2013
BP 407
EP 416
PG 10
WC Ergonomics; Transportation Science & Technology
SC Engineering; Transportation
GA BC3OY
UT WOS:000351775400040
ER

PT B
AU Barshi, I
   Feldman, J
AF Barshi, Immanuel
   Feldman, Jolene
BE Landry, SJ
TI The Safety and Ethics of Crew Meals
SO ADVANCES IN HUMAN ASPECTS OF AVIATION
SE Advances in Human Factors and Ergonomics Series
LA English
DT Article; Book Chapter
DE blood glucose; cognition; aviation; pilots; risk; performance; food
ID BLOOD-GLUCOSE; PERFORMANCE; AWARENESS; COGNITION; IMPACT
AB Glucose is the fuel of the brain. When blood glucose levels drop, so does cognition. Interestingly, it's the higher cognitive functions, such as decision making and the ability to perceive risk, that go out first. Motor skills go last, and so the pilots' hands may go to the right switches and levers, but his mind will be lagging behind. Data also shows that cognitive performance degrades long before people are aware of any symptoms such as a sense of hunger or having a headache. Thus, low blood glucose levels represent a serious safety risk in complex operations, and especially in aviation where pilots may have to go for many hours with little or no food. Part of the reason for this lack of food is the elimination of crew meals in many domestic operations. We review data showing the effects of low blood glucose on pilot performance, and discuss the ethical and practical issues surrounding the problem.
C1 [Barshi, Immanuel] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
   [Feldman, Jolene] San Jose State Univ, San Jose, CA 95192 USA.
RP Barshi, I (reprint author), NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
EM Immanuel.barshi@nasa.gov; Jolene.M.Feldman@nasa.gov
NR 22
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PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-1-4398-7117-1; 978-1-4398-7116-4
J9 ADV HUM FACT ERG SER
JI ADV. HUMAN FACT. ERG. SER
PY 2013
BP 472
EP 480
PG 9
WC Ergonomics; Transportation Science & Technology
SC Engineering; Transportation
GA BC3OY
UT WOS:000351775400046
ER

PT B
AU Harrivel, A
   Hearn, T
AF Harrivel, Angela
   Hearn, Tristan
BE Landry, SJ
TI Functional Near Infrared Spectroscopy: Watching the Brain in Flight
SO ADVANCES IN HUMAN ASPECTS OF AVIATION
SE Advances in Human Factors and Ergonomics Series
LA English
DT Article; Book Chapter
DE cognition; fNIRS; in-task monitoring; Kalman filter; real time; signal
   processing
AB Functional Near Infrared Spectroscopy (fNIRS) is an emerging neurological sensing technique applicable to optimizing human performance in transportation operations, such as commercial aviation. Cognitive state can be determined via pattern classification of functional activations measured with fNIRS. Operational application calls for further development of algorithms and filters for dynamic artifact removal. The concept of using the frequency domain phase shift signal to tune a Kalman filter is introduced to improve the quality of fNIRS signals in real-time. Hemoglobin concentration and phase shift traces were simulated for four different types of motion artifact to demonstrate the filter. Unwanted signal was reduced by at least 43%, and the contrast of the filtered oxygenated hemoglobin signal was increased by more than 100% overall. This filtering method is a good candidate for qualifying fNIRS signals in real time without auxiliary sensors.
C1 [Harrivel, Angela; Hearn, Tristan] NASA, Glenn Res Ctr, Cleveland, OH 44135 USA.
RP Harrivel, A (reprint author), NASA, Glenn Res Ctr, Cleveland, OH 44135 USA.
EM angela.r.harrivel@nasa.gov
NR 16
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U1 0
U2 0
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-1-4398-7117-1; 978-1-4398-7116-4
J9 ADV HUM FACT ERG SER
JI ADV. HUMAN FACT. ERG. SER
PY 2013
BP 541
EP 550
PG 10
WC Ergonomics; Transportation Science & Technology
SC Engineering; Transportation
GA BC3OY
UT WOS:000351775400052
ER

PT B
AU Martin, L
   Mercer, J
   Callantine, T
   Kupfer, M
   Cabrall, C
AF Martin, Lynne
   Mercer, Joey
   Callantine, Todd
   Kupfer, Michael
   Cabrall, Christopher
BE Landry, SJ
TI Air Traffic Controllers' Control Strategies in the Terminal Area under
   Off-Nominal Conditions
SO ADVANCES IN HUMAN ASPECTS OF AVIATION
SE Advances in Human Factors and Ergonomics Series
LA English
DT Article; Book Chapter
DE CMS; ATC; traffic management strategy; collaborative work
AB A human-in-the-loop simulation investigated the robustness of a schedule-based terminal-area air traffic management concept, and its supporting controller tools, to off-nominal events - events that led to situations in which runway arrival schedules required adjustments and controllers could no longer use speed control alone to impose the necessary delays. The main research question was exploratory: to assess whether controllers could safely resolve and control the traffic during off-nominal events. A focus was the role of the supervisor - how he managed the schedules, how he assisted the controllers, what strategies he used, and which combinations of tools he used. Observations and questionnaire responses revealed supervisor strategies for resolving events followed a similar pattern: a standard approach specific to each type of event often resolved to a smooth conclusion. However, due to the range of factors influencing the event (e.g., environmental conditions, aircraft density on the schedule, etc.), sometimes the plan required revision and actions had a wide-ranging effect.
C1 [Martin, Lynne; Mercer, Joey; Callantine, Todd; Kupfer, Michael; Cabrall, Christopher] San Jose State Univ, NASA Ames Res Ctr, Moffett Field, CA 94035 USA.
RP Martin, L (reprint author), San Jose State Univ, NASA Ames Res Ctr, Moffett Field, CA 94035 USA.
EM Lynne.Martin@nasa.gov; Joey.Mercer@nasa.gov; Todd.Callantine@nasa.gov;
   Michael.Kupfer@nasa.gov; Christopher.D.Cabrall@nasa.gov
NR 6
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U1 0
U2 0
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-1-4398-7117-1; 978-1-4398-7116-4
J9 ADV HUM FACT ERG SER
JI ADV. HUMAN FACT. ERG. SER
PY 2013
BP 569
EP 580
PG 12
WC Ergonomics; Transportation Science & Technology
SC Engineering; Transportation
GA BC3OY
UT WOS:000351775400055
ER

PT S
AU Jones, TT
   Seminoff, JA
AF Jones, T. Todd
   Seminoff, Jeffrey A.
BE Wyneken, J
   Lohmann, KJ
   Musick, JA
TI Feeding Biology Advances from Field-Based Observations, Physiological
   Studies, and Molecular Techniques
SO Biology of Sea Turtles, Vol III
SE CRC Marine Biology Series
LA English
DT Article; Book Chapter
ID TURTLES CHELONIA-MYDAS; LOGGERHEAD SEA-TURTLES; IMMATURE GREEN TURTLES;
   STABLE-ISOTOPE ANALYSES; FATTY-ACID-COMPOSITION; DERMOCHELYS-CORIACEA
   REPTILIA; PACIFIC LEATHERBACK TURTLES; GORGONA-NATIONAL-PARK; CENTRAL
   NORTH PACIFIC; GULF-OF-CALIFORNIA
C1 [Jones, T. Todd] NOAA, Natl Marine Fisheries Serv, Honolulu, HI 96822 USA.
   [Seminoff, Jeffrey A.] NOAA, Natl Marine Fisheries Serv, Honolulu, HI USA.
RP Jones, TT (reprint author), NOAA, Natl Marine Fisheries Serv, Honolulu, HI 96822 USA.
NR 240
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Z9 9
U1 2
U2 5
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
SN 2154-7769
BN 978-1-4398-7308-3; 978-1-4398-7307-6
J9 CRC MAR BIOL SER
JI CRC Mar. Biol. Ser.
PY 2013
BP 211
EP 247
D2 10.1201/b13895
PG 37
WC Marine & Freshwater Biology; Zoology
SC Marine & Freshwater Biology; Zoology
GA BC5LE
UT WOS:000353356900010
ER

PT J
AU Doerr, JC
   Hill, RL
AF Doerr, Jennifer C.
   Hill, Ronald L.
TI Home range, movement rates, and habitat use of queen conch, Strombus
   gigas, in St. John, US Virgin Islands
SO CARIBBEAN JOURNAL OF SCIENCE
LA English
DT Article
DE Core area; habitat use; home range; site fidelity; spatial distribution
AB The queen conch, Strombus gigas, is a highly valued fishery resource in the Caribbean basin, historically second only to the spiny lobster. Currently listed in Appendix II of CITES, historical surveys from the U.S. Virgin Islands have documented wide-spread reductions in population densities. Habitat use and movement patterns of queen conch differ by size and maturity status, making it important to identify areas and habitat types that can play a role in the recovery of this species. We tracked long-term movements and spatial distributions of conch in St. John, USVI, using visual surveys coupled with mark-and-recapture techniques. Juvenile conch exhibited the smallest mean home range (95% contour) and core area (50% contour) at 8470 m(2) and 2083 m(2), respectively, but had the largest aggregate home range (115,410 m(2)) and aggregate core area (55,055 m(2)). Transitional conch had the largest mean home range and core area at 18,203 m(2) and 4944 m(2), respectively, with an aggregate home range and core area of 113,147 m(2) and 59,067 m(2). Adults had an aggregate home range and core area of 65,045 m(2) and 29,178 m(2), with a mean home range and core area of 14,987 m(2) and 3929 m(2). Adults exhibited the highest daily movement rate at 11.36 m per day, with juvenile and transitional conch having similar rates of 4.66 m per day and 3.44 m per day, respectively. Multiple recapture events of tagged conch showed an ontogenetic shift in habitat use as maturing individuals moved from shallow seagrass habitats into deeper-water macroalgae plains.
C1 [Doerr, Jennifer C.; Hill, Ronald L.] NOAA, Natl Marine Fisheries Serv, SEFSC, Galveston Lab, 4700 Ave U, Galveston, TX 77551 USA.
RP Doerr, JC (reprint author), NOAA, Natl Marine Fisheries Serv, SEFSC, Galveston Lab, 4700 Ave U, Galveston, TX 77551 USA.
EM Jennifer.Doerr@noaa.gov
FU NOAA Coral Reef Conservation Program
FX Funding for this work was provided by the NOAA Coral Reef Conservation
   Program. We thank the staff of the U.S. Virgin Islands National Park
   Service for their insight and assistance, particularly Rafe Boulon and
   Thomas Kelley. We also thank the following people for their field and/or
   laboratory assistance: Rich Appeldoorn, Phil Caldwell, Kimberly Ferran,
   Gregg Gitschlag, Omar Guerra, Shawn Hillen, Kirk Kilfoyle, Jeff
   Matthews, Tom Minello, Jennifer Purviance, Jose Rivera, Juan Salas, Ryan
   Schloesser, and Elizabeth Wilson. The mention of commercial products
   does not represent an endorsement by NMFS, NOAA, or the U.S. Department
   of Commerce.
NR 32
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U1 3
U2 4
PU UNIV PUERTO RICO,
PI MAYAGUEZ
PA COLLEGE ARTS SCIENCES, MAYAGUEZ, PR 00680 USA
SN 0008-6452
J9 CARIBB J SCI
JI Caribb. J. Sci.
PY 2013
VL 47
IS 2-3
BP 251
EP 259
PG 9
WC Biodiversity Conservation
SC Biodiversity & Conservation
GA V43YA
UT WOS:000209715500012
ER

PT J
AU Prohaska, BK
   Tsang, PCW
   Driggers, WB
   Hoffmayer, ER
   Wheeler, CR
   Brown, AC
   Sulikowski, JA
AF Prohaska, Bianca K.
   Tsang, Paul C. W.
   Driggers, William B., III
   Hoffmayer, Eric R.
   Wheeler, Carolyn R.
   Brown, A. Christine
   Sulikowski, James A.
TI Assessing reproductive status in elasmobranch fishes using steroid
   hormones extracted from skeletal muscle tissue
SO CONSERVATION PHYSIOLOGY
LA English
DT Article
DE Steroid hormones; reproductive status; elasmobranch; non-lethal sampling
AB Elasmobranch fishes (sharks, skates, and rays) are particularly susceptible to anthropogenic threats, making a thorough understanding of their life history characteristics essential for proper management. Historically, elasmobranch reproductive data have been collected by lethal sampling, an approach that is problematic for threatened and endangered species. However, recent studies have demonstrated that non-lethal approaches can be as effective as lethal ones for assessment of the reproductive status of an animal. For example, plasma has been used to examine concentrations of steroid hormones. Additionally, skeletal muscle tissue, which can be obtained non-lethally and with minimal stress, can also be used to quantify concentrations of steroid hormones. Skeletal muscle progesterone, testosterone, and estradiol concentrations were determined to be statistically significant indicators of reproductive status in the oviparous Leucoraja erinacea, the yolk-dependent viviparous Squalus acanthias, and the yolk-sac placental viviparous Rhizoprionodon terraenovae. The results of the present study demonstrate that steroid hormones present in non-lethally harvested skeletal muscle tissue can be used as reliable indicators of reproductive status in elasmobranchs.
C1 [Prohaska, Bianca K.; Wheeler, Carolyn R.; Brown, A. Christine; Sulikowski, James A.] Univ New England, Dept Marine Sci, 11 Hills Beach Rd, Biddeford, ME 04005 USA.
   [Tsang, Paul C. W.] Univ New Hampshire, Dept Mol Cellular & Biomed Sci, Durham, NH 03824 USA.
   [Driggers, William B., III; Hoffmayer, Eric R.] NOAA, Natl Marine Fisheries Serv, Mississippi Labs, Pascagoula, MS 39567 USA.
RP Prohaska, BK (reprint author), Univ New England, Dept Marine Sci, 11 Hills Beach Rd, Biddeford, ME 04005 USA.
EM bprohaska@une.edu
FU Save Our Seas Foundation [P170]; Marine Science Graduate Program at the
   University of New England (UNE)
FX This work was supported by a Save Our Seas Foundation grant (reference
   no. P170) to J.A.S., and the Marine Science Graduate Program at the
   University of New England (UNE). We thank captains C. Brown (F/V Proud
   Mary) and C. Felch (F/V Lady Victoria), as well as the NOAA, Pascagoula
   MS, bottom longline survey. We also thank the graduate and undergraduate
   students of the Sulikowski laboratory at UNE, and the Tsang laboratory
   at the University of New Hampshire. This work was sanctioned by the
   UNE's Animal Care and Use Committee (IACUC protocol no.
   UNE-20121107SULIJ). This research was conducted as part of the
   requirements for a master's degree at the University of New England.
   This manuscript represents Marine Science Center contribution number 52.
NR 53
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U1 3
U2 3
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 2051-1434
J9 CONSERV PHYSIOL
JI Conserv. Physiol.
PY 2013
VL 1
IS 1
AR cot028
DI 10.1093/conphys/cot028
PG 12
WC Biodiversity Conservation; Ecology; Environmental Sciences; Physiology
SC Biodiversity & Conservation; Environmental Sciences & Ecology;
   Physiology
GA V43TM
UT WOS:000209703700024
PM 27293612
ER

PT B
AU Fitelson, B
AF Fitelson, Branden
BE Blaauw, M
TI Contrastive Bayesiansim
SO CONTRASTIVISM IN PHILOSOPHY
SE Routledge Studies in Contemporary Philosophy
LA English
DT Article; Book Chapter
ID CONJUNCTION FALLACY; IRRELEVANT CONJUNCTION; CONFIRMATION; PROBABILITY;
   SUPPORT
C1 [Fitelson, Branden] Univ Calif Berkeley, Berkeley, CA USA.
   [Fitelson, Branden] San Jose State, San Jose, CA USA.
   [Fitelson, Branden] Stanford, Stanford, CA USA.
   [Fitelson, Branden] NASA, Washington, DC USA.
RP Fitelson, B (reprint author), Rutgers State Univ, Philosophy, Piscataway, NJ 08855 USA.
NR 52
TC 0
Z9 0
U1 1
U2 1
PU ROUTLEDGE
PI ABINGDON
PA 2 PARK SQ, MILTON PARK, ABINGDON OX14 4RN, OXFORD, ENGLAND
BN 978-0-203-11747-7; 978-0-415-87860-9
J9 ROUT STUD CONTEMP PH
PY 2013
VL 39
BP 64
EP 87
PG 24
WC Philosophy
SC Philosophy
GA BD8SC
UT WOS:000364281400004
ER

PT J
AU Peloquin, J
   Swan, C
   Gruber, N
   Vogt, M
   Claustre, H
   Ras, J
   Uitz, J
   Barlow, R
   Behrenfeld, M
   Bidigare, R
   Dierssen, H
   Ditullio, G
   Fernandez, E
   Gallienne, C
   Gibb, S
   Goericke, R
   Harding, L
   Head, E
   Holligan, P
   Hooker, S
   Karl, D
   Landry, M
   Letelier, R
   Llewellyn, CA
   Lomas, M
   Lucas, M
   Mannino, A
   Marty, JC
   Mitchell, BG
   Muller-Karger, F
   Nelson, N
   O'Brien, C
   Prezelin, B
   Repeta, D
   Smith, WO
   Smythe-Wright, D
   Stumpf, R
   Subramaniam, A
   Suzuki, K
   Trees, C
   Vernet, M
   Wasmund, N
   Wright, S
AF Peloquin, J.
   Swan, C.
   Gruber, N.
   Vogt, M.
   Claustre, H.
   Ras, J.
   Uitz, J.
   Barlow, R.
   Behrenfeld, M.
   Bidigare, R.
   Dierssen, H.
   Ditullio, G.
   Fernandez, E.
   Gallienne, C.
   Gibb, S.
   Goericke, R.
   Harding, L.
   Head, E.
   Holligan, P.
   Hooker, S.
   Karl, D.
   Landry, M.
   Letelier, R.
   Llewellyn, C. A.
   Lomas, M.
   Lucas, M.
   Mannino, A.
   Marty, J. -C.
   Mitchell, B. G.
   Muller-Karger, F.
   Nelson, N.
   O'Brien, C.
   Prezelin, B.
   Repeta, D.
   Smith, W. O., Jr.
   Smythe-Wright, D.
   Stumpf, R.
   Subramaniam, A.
   Suzuki, K.
   Trees, C.
   Vernet, M.
   Wasmund, N.
   Wright, S.
TI The MAREDAT global database of high performance liquid chromatography
   marine pigment measurements
SO EARTH SYSTEM SCIENCE DATA
LA English
DT Article
ID PHYTOPLANKTON COMMUNITY STRUCTURE; SOUTH-PACIFIC OCEAN; SUB-ARCTIC
   PACIFIC; CHLOROPHYLL-A; FUNCTIONAL TYPES; NORTH-ATLANTIC; IN-SITU;
   BIOGEOCHEMISTRY MODELS; FLOW-CYTOMETRY; CASE-1 WATERS
AB A global pigment database consisting of 35 634 pigment suites measured by high performance liquid chromatography was assembled in support of the MARine Ecosytem DATa (MAREDAT) initiative. These data originate from 136 field surveys within the global ocean, were solicited from investigators and databases, compiled, and then quality controlled. Nearly one quarter of the data originates from the Laboratoire d'Oceanographie de Villefranche (LOV), with an additional 17% and 19% stemming from the US JGOFS and LTER programs, respectively. The MAREDAT pigment database provides high quality measurements of the major taxonomic pigments including chlorophylls a and b, 19'-butanoyloxyfucoxanthin, 19'-hexanoyloxyfucoxanthin, alloxanthin, divinyl chlorophyll a, fucoxanthin, lutein, peridinin, prasinoxanthin, violaxanthin and zeaxanthin, which may be used in varying combinations to estimate phytoplankton community composition. Quality control measures consisted of flagging samples that had a total chlorophyll a concentration of zero, had fewer than four reported accessory pigments, or exceeded two standard deviations of the log-linear regression of total chlorophyll a with total accessory pigment concentrations. We anticipate the MAREDAT pigment database to be of use in the marine ecology, remote sensing and ecological modeling communities, where it will support model validation and advance our global perspective on marine biodiversity. The original dataset together with quality control flags as well as the gridded MAREDAT pigment data may be downloaded from PANGAEA: http://doi.pangaea.de/10.1594/PANGAEA.793246.
C1 [Peloquin, J.; Swan, C.; Gruber, N.; Vogt, M.; O'Brien, C.] Swiss Fed Inst Technol, Inst Biogeochem & Pollutant Dynam, Environm Phys Grp, Zurich, Switzerland.
   [Claustre, H.; Ras, J.; Uitz, J.; Marty, J. -C.] CNRS, UMR7093, Lab Oceanog Villefranche, F-06230 Villefranche Sur Mer, France.
   [Claustre, H.; Ras, J.; Uitz, J.; Marty, J. -C.] Univ Paris 06, UMR7093, Lab Oceanog Villefranche, F-06230 Villefranche Sur Mer, France.
   [Barlow, R.] Bayworld Ctr Res & Educ, ZA-8012 Cape Town, South Africa.
   [Barlow, R.; Lucas, M.] Univ Cape Town, Marine Res Inst, ZA-7701 Cape Town, South Africa.
   [Behrenfeld, M.] Oregon State Univ, Dept Bot & Plant Pathol, Corvallis, OR 97331 USA.
   [Bidigare, R.; Karl, D.; Landry, M.] Univ Hawaii Manoa, Dept Oceanog, Honolulu, HI 96822 USA.
   [Dierssen, H.] Univ Connecticut, Dept Marine Sci, Groton, CT 06340 USA.
   [Ditullio, G.] Coll Charleston, Grice Marine Lab, Charleston, SC USA.
   [Fernandez, E.] Univ Vigo, Dept Ecoloxia & Biol Anim, Vigo 36310, Spain.
   [Gallienne, C.; Llewellyn, C. A.] Plymouth Marine Lab, Plymouth PL1 3DH, Devon, England.
   [Gibb, S.] Univ Highlands & Isl, Environm Res Inst, Inverness, Scotland.
   [Goericke, R.; Mitchell, B. G.; Vernet, M.] Univ Calif San Diego, Scripps Inst Oceanog, San Diego, CA 92103 USA.
   [Harding, L.] Univ Maryland, Horn Point Lab, Cambridge, MD USA.
   [Head, E.] Bedford Inst Oceanog, Ecosyst Res Div, Dartmouth, NS, Canada.
   [Holligan, P.; Smythe-Wright, D.] Univ Southampton, Natl Oceanog Ctr, Ocean & Earth Sci, Southampton SO14 3ZH, Hants, England.
   [Hooker, S.; Mannino, A.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
   [Letelier, R.] Oregon State Univ, Coll Ocean & Atmospher Sci, Corvallis, OR 97331 USA.
   [Lomas, M.] Bermuda Inst Ocean Sci, St Georges GE 01, Bermuda.
   [Muller-Karger, F.] Univ S Florida, Coll Marine Sci, Inst Marine Remote Sensing IMaRS, St Petersburg, FL 33701 USA.
   [Nelson, N.] Univ Calif Santa Barbara, Earth Res Inst, Santa Barbara, CA 93106 USA.
   [Prezelin, B.] Univ Calif Santa Barbara, Dept Ecol Evolut & Marine Biol, Santa Barbara, CA 93106 USA.
   [Repeta, D.] Woods Hole Oceanog Inst, Woods Hole, MA 02543 USA.
   [Smith, W. O., Jr.] Virginia Inst Marine Sci, Coll William & Mary, Gloucester Point, VA 23062 USA.
   [Stumpf, R.] NOAA, Natl Ocean Serv, Silver Spring, MD USA.
   [Subramaniam, A.] Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY USA.
   [Suzuki, K.] Hokkaido Univ, Environm Earth Sci, Sapporo, Hokkaido 0600810, Japan.
   [Trees, C.] NATO Undersea Res Ctr, La Spezia, Italy.
   [Wasmund, N.] Leibniz Inst Balt Sea Res, D-18119 Warnemunde, Germany.
   [Wright, S.] Australian Antarctic Div, Kingston, Tas 7050, Australia.
   [Wright, S.] Antarctic Climate & Ecosyst Cooperat Res Ctr, Kingston, Tas 7050, Australia.
RP Swan, C (reprint author), Swiss Fed Inst Technol, Inst Biogeochem & Pollutant Dynam, Environm Phys Grp, Zurich, Switzerland.
EM chantal.swan@usys.ethz.ch
RI Gruber, Nicolas/B-7013-2009; Suzuki, Koji/A-4349-2013; CLAUSTRE,
   Herve/E-6877-2011; Letelier, Ricardo/A-6953-2009; O'Brien,
   Colleen/H-7698-2015; 
OI Gruber, Nicolas/0000-0002-2085-2310; Suzuki, Koji/0000-0001-5354-1044;
   CLAUSTRE, Herve/0000-0001-6243-0258; Letelier,
   Ricardo/0000-0003-3376-4026; Subramaniam, Ajit/0000-0003-1316-5827;
   O'Brien, Colleen/0000-0003-4456-8119; Gibb, Stuart/0000-0003-3882-338X;
   Lomas, Michael/0000-0003-1209-3753
FU ETH Zurich; European Community [238366]; CNRS-INSU
FX J. Peloquin, C. Swan, N. Gruber and M. Vogt were funded by ETH Zurich.
   C. O'Brien has received funding from the European Community's Seventh
   Framework Programme (FP7 2007-2013) under grant agreement no. 238366. We
   are grateful to two anonymous reviewers for their evaluation of this
   manuscript. We thank Erik Buitenhuis for producing the gridded netCDF
   product, Stephane Pesant for archiving the data on www.Pangaea.de, and
   Dave Carlson and Hans Pfeiffenberger at ESSD for their patience. We
   would like to further acknowledge Gerald Moore, Denise Cummings, Tony
   Knap, Dave Robins, Dave Suggett and Guy Westbrook for their HPLC data
   contributions. We are equally grateful for all the project PIs who
   contributed data, as well as for the anonymous staff who took part in
   the sampling work during the cruises, who carried out the HPLC analysis,
   and without whom the construction of such a database would not have been
   possible. Most of the data from the LOV database were acquired as part
   of the French national programs JGOFS-France, PROOF and CYBER, which
   were funded by CNRS-INSU.
NR 73
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U1 4
U2 10
PU COPERNICUS GESELLSCHAFT MBH
PI GOTTINGEN
PA BAHNHOFSALLEE 1E, GOTTINGEN, 37081, GERMANY
SN 1866-3508
EI 1866-3516
J9 EARTH SYST SCI DATA
JI Earth Syst. Sci. Data
PY 2013
VL 5
IS 1
BP 109
EP 123
DI 10.5194/essd-5-109-2013
PG 15
WC Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences
SC Geology; Meteorology & Atmospheric Sciences
GA V39MP
UT WOS:000209415400009
ER

PT J
AU Peng, G
   Meier, WN
   Scott, DJ
   Savoie, MH
AF Peng, G.
   Meier, W. N.
   Scott, D. J.
   Savoie, M. H.
TI A long-term and reproducible passive microwave sea ice concentration
   data record for climate studies and monitoring
SO EARTH SYSTEM SCIENCE DATA
LA English
DT Article
AB A long-term, consistent, and reproducible satellite-based passive microwave sea ice concentration climate data record (CDR) is available for climate studies, monitoring, and model validation with an initial operation capability (IOC). The daily and monthly sea ice concentration data are on the National Snow and Ice Data Center (NSIDC) polar stereographic grid with nominal 25 km x 25 km grid cells in both the Southern and Northern Hemisphere polar regions from 9 July 1987 to 31 December 2007. The data files are available in the NetCDF data format at http://nsidc.org/data/g02202.html and archived by the National Climatic Data Center (NCDC) of the National Oceanic and Atmospheric Administration (NOAA) under the satellite climate data record program (http://www.ncdc.noaa.gov/cdr/operationalcdrs.html).
   The description and basic characteristics of the NOAA/NSIDC passive microwave sea ice concentration CDR are presented here. The CDR provides similar spatial and temporal variability as the heritage products to the user communities with the additional documentation, traceability, and reproducibility that meet current standards and guidelines for climate data records. The data set, along with detailed data processing steps and error source information, can be found at http://dx.doi.org/10.7265/N5B56GN3.
C1 [Peng, G.] North Carolina State Univ CICS NC, Cooperat Inst Climate & Satellites, Asheville, NC 28801 USA.
   [Peng, G.] NOAA, Natl Climat Data Ctr, Remote Sensing Applicat Div, Asheville, NC 28801 USA.
   [Meier, W. N.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
   [Scott, D. J.; Savoie, M. H.] Univ Colorado, Natl Snow & Ice Data Ctr, Boulder, CO 80309 USA.
RP Peng, G (reprint author), North Carolina State Univ CICS NC, Cooperat Inst Climate & Satellites, 151 Patton Ave, Asheville, NC 28801 USA.
EM ge.peng@noaa.gov
OI Meier, Walter/0000-0003-2857-0550; Peng, Ge /0000-0002-1986-9115
NR 29
TC 27
Z9 27
U1 0
U2 1
PU COPERNICUS GESELLSCHAFT MBH
PI GOTTINGEN
PA BAHNHOFSALLEE 1E, GOTTINGEN, 37081, GERMANY
SN 1866-3508
EI 1866-3516
J9 EARTH SYST SCI DATA
JI Earth Syst. Sci. Data
PY 2013
VL 5
IS 2
BP 311
EP 318
DI 10.5194/essd-5-311-2013
PG 8
WC Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences
SC Geology; Meteorology & Atmospheric Sciences
GA V39MQ
UT WOS:000209415500008
ER

PT J
AU Baker, JD
   Harting, AL
   Littnan, CL
AF Baker, Jason D.
   Harting, Albert L.
   Littnan, Charles L.
TI A two-stage translocation strategy for improving juvenile survival of
   Hawaiian monk seals
SO ENDANGERED SPECIES RESEARCH
LA English
DT Article
ID METAPOPULATION VIABILITY; MONACHUS-SCHAUINSLANDI; POPULATION VIABILITY;
   CONSERVATION; REINTRODUCTION; ISLANDS; CONNECTIVITY; DIRECTIONS;
   EXTINCTION; MANAGEMENT
AB We propose a two-stage translocation strategy to conserve metapopulations of endangered species. The concept takes advantage of variation in vital rates among subpopulations to increase individual fitness, improve species status, and maintain metapopulation structure for long-term resiliency. We simulate two-stage translocation scenarios for conserving the Hawaiian monk seal Monachus schauinslandi, a critically endangered species which exhibits highly variable juvenile, but consistently favorable adult, survival rates. Moving young seals from areas of lower to higher juvenile survival and subsequently returning them to their source site once they have reached an appropriate age improves population reproductive value. We present a decision framework for implementing two-stage translocation in a manner that minimizes risks while increasing the likelihood of desired outcomes. Two-stage translocation may be effective for metapopulations of other rare species which exhibit variation in vital rates among subpopulations and a life-stage bottleneck due to factors that are not amenable to in situ mitigation.
RP Baker, JD (reprint author), NOAA, Pacific Isl Fisheries Sci Ctr, Natl Marine Fisheries Serv, 2570 Dole St, Honolulu, HI 96822 USA.
EM jason.baker@noaa.gov
NR 38
TC 3
Z9 3
U1 9
U2 32
PU INTER-RESEARCH
PI OLDENDORF LUHE
PA NORDBUNTE 23, D-21385 OLDENDORF LUHE, GERMANY
SN 1863-5407
EI 1613-4796
J9 ENDANGER SPECIES RES
JI Endanger. Species Res.
PY 2013
VL 21
IS 1
BP 33
EP U131
DI 10.3354/esr00506
PG 16
WC Biodiversity Conservation
SC Biodiversity & Conservation
GA 175VZ
UT WOS:000321263000004
ER

PT S
AU Budge, A
   Kiang, R
   Morain, S
AF Budge, Amelia
   Kiang, Richard
   Morain, Stan
BE Morain, SA
   Budge, AM
TI Environmental Tracking for Public Health Surveillance Preface
SO ENVIRONMENTAL TRACKING FOR PUBLIC HEALTH SURVEILLANCE
SE International Society for Photogrammetry and Remote Sensing (ISPRS) Book
   Series
LA English
DT Editorial Material; Book Chapter
C1 [Budge, Amelia; Morain, Stan] Univ New Mexico, Earth Data Anal Ctr, Albuquerque, NM 87131 USA.
   [Kiang, Richard] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
RP Budge, A (reprint author), Univ New Mexico, Earth Data Anal Ctr, Albuquerque, NM 87131 USA.
EM abudge@edac.unm.edu; richard.kiang@nasa.gov; smorain@edac.unm.edu
NR 0
TC 0
Z9 0
U1 0
U2 0
PU A A BALKEMA PUBLISHERS
PI LEIDEN
PA SCHIPHOLWEG 107C, PO BOX 447, 2316 XC LEIDEN, NETHERLANDS
SN 1572-3348
BN 978-0-203-09327-6; 978-0-415-58471-5
J9 ISPRS BOOK SER
PY 2013
VL 11
BP VII
EP VIII
PG 2
WC Public, Environmental & Occupational Health; Remote Sensing
SC Public, Environmental & Occupational Health; Remote Sensing
GA BC2MZ
UT WOS:000351090700001
ER

PT S
AU Kiang, RK
   Soebiyanto, RP
   Grieco, JP
   Achee, NL
   Harrington, LC
   Reisen, WK
   Anyamba, A
   Linthicum, KJ
   Pinzon, JE
   Zollner, G
   Collacicco-Mayhugh, MG
AF Kiang, R. K.
   Soebiyanto, R. P.
   Grieco, J. P.
   Achee, N. L.
   Harrington, L. C.
   Reisen, W. K.
   Anyamba, A.
   Linthicum, K. J.
   Pinzon, J. E.
   Zollner, G.
   Collacicco-Mayhugh, M. G.
BE Morain, SA
   Budge, AM
TI Vector-borne infectious diseases and influenza
SO ENVIRONMENTAL TRACKING FOR PUBLIC HEALTH SURVEILLANCE
SE International Society for Photogrammetry and Remote Sensing (ISPRS) Book
   Series
LA English
DT Article; Book Chapter
ID RIFT-VALLEY FEVER; AEDES-AEGYPTI DIPTERA; WEST-NILE-VIRUS; EQUINE
   ENCEPHALOMYELITIS VIRUS; CULICIDAE LARVAL HABITATS; ST-LOUIS
   ENCEPHALITIS; AMERICAN CUTANEOUS LEISHMANIASIS; GEOGRAPHIC
   INFORMATION-SYSTEMS; SOUTHWESTERN UNITED-STATES; NINO
   SOUTHERN-OSCILLATION
AB Breeding, propagation and survivorship of disease-transmitting arthropod vectors often depend on meteorological and environmental parameters. Statistical and biological modelling that incorporate satellite-acquired data provide useful tools for assessing and forecasting these diseases, assessing possible outbreak areas and providing vital information for policies and decision making.
C1 [Kiang, R. K.; Soebiyanto, R. P.; Anyamba, A.; Pinzon, J. E.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
   [Soebiyanto, R. P.; Anyamba, A.] Univ Space Res Assoc, Columbia, MD 21044 USA.
   [Grieco, J. P.; Achee, N. L.] Uniformed Serv Univ Hlth Sci, Bethesda, MD 20814 USA.
   [Harrington, L. C.] Cornell Univ, Ithaca, NY 14853 USA.
   [Reisen, W. K.] Univ Calif Davis, Sch Vet Med, Davis, CA 95616 USA.
   [Linthicum, K. J.] ARS, USDA, Gainesville, FL 32608 USA.
   [Pinzon, J. E.] Sci Syst & Applicat Inc, Lanham, MD 20706 USA.
   [Zollner, G.] Walter Reed Army Inst Res, Silver Spring, MD 20910 USA.
   [Collacicco-Mayhugh, M. G.] Walter Reed Army Inst Res, Div Entomol, Silver Spring, MD 20910 USA.
RP Kiang, RK (reprint author), NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
EM richard.kiang@nasa.gov; radina.p.soebiyanto@nasa.gov; jgrieco@usuhs.mil;
   nachee@usuhs.mil; lch27@cornell.edu; wkreisen@ucdavis.edu;
   assaf.anyamba@nasa.gov; kenneth.linthicum@ars.usda.gov;
   jorge.e.pinzon@nasa.gov; gabriela.zollner@us.army.mil;
   Michelle.Colacicco@us.army.mil
NR 317
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PU A A BALKEMA PUBLISHERS
PI LEIDEN
PA SCHIPHOLWEG 107C, PO BOX 447, 2316 XC LEIDEN, NETHERLANDS
SN 1572-3348
BN 978-0-203-09327-6; 978-0-415-58471-5
J9 ISPRS BOOK SER
PY 2013
VL 11
BP 21
EP 86
PG 66
WC Public, Environmental & Occupational Health; Remote Sensing
SC Public, Environmental & Occupational Health; Remote Sensing
GA BC2MZ
UT WOS:000351090700004
ER

PT S
AU Kempler, S
   Leptoukh, GG
   Kiang, RK
   Soebiyanto, RP
   Tong, DQ
   Ceccato, P
   Maxwell, S
   Rommel, RG
   Jacquez, GM
   Benedict, KK
   Morain, SA
   Yang, P
   Huang, Q
   Golden, ML
   Chen, RS
   Pinzon, JE
   Zaitchik, B
   Irwin, D
   Estes, S
   Luvall, J
   Wimberly, M
   Xiao, X
   Charland, KM
   Stumpf, RP
   Deng, Z
   Tilburg, CE
   Liu, Y
   McClure, L
   Huff, A
AF Kempler, S.
   Leptoukh, G. G.
   Kiang, R. K.
   Soebiyanto, R. P.
   Tong, D. Q.
   Ceccato, P.
   Maxwell, S.
   Rommel, R. G.
   Jacquez, G. M.
   Benedict, K. K.
   Morain, S. A.
   Yang, P.
   Huang, Q.
   Golden, M. L.
   Chen, R. S.
   Pinzon, J. E.
   Zaitchik, B.
   Irwin, D.
   Estes, S.
   Luvall, J.
   Wimberly, M.
   Xiao, X.
   Charland, K. M.
   Stumpf, R. P.
   Deng, Z.
   Tilburg, C. E.
   Liu, Y.
   McClure, L.
   Huff, A.
BE Morain, SA
   Budge, AM
TI Data discovery, access and retrieval
SO ENVIRONMENTAL TRACKING FOR PUBLIC HEALTH SURVEILLANCE
SE International Society for Photogrammetry and Remote Sensing (ISPRS) Book
   Series
LA English
DT Article; Book Chapter
ID FINE PARTICULATE MATTER; REMOTE-SENSING DATA; RIFT-VALLEY FEVER;
   RANGELAND VEGETATION TYPE; DATA ASSIMILATION SYSTEM; LAND-SURFACE MODEL;
   UNITED-STATES; AIR-POLLUTION; MALARIA TRANSMISSION; SATELLITE
   MEASUREMENTS
AB This chapter explores the complex, and sometimes frustrating, world of data discovery, access, delivery and use by reference to the US National Aeronautics & Space Administration's (NASA's) public health applications portfolio in 2011. It also provides examples of global information system applications in health.
C1 [Kempler, S.; Leptoukh, G. G.; Kiang, R. K.; Soebiyanto, R. P.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
   [Tong, D. Q.] George Mason Univ, SISS, Fairfax, VA 22030 USA.
   [Ceccato, P.] Columbia Univ, IRI, Palisades, NY 10964 USA.
   [Maxwell, S.; Rommel, R. G.; Jacquez, G. M.] BioMedware, Ann Arbor, MI 48104 USA.
   [Benedict, K. K.; Morain, S. A.] Univ New Mexico, Earth Data Anal Ctr, Albuquerque, NM 87131 USA.
   [Yang, P.; Huang, Q.] George Mason Univ, Fairfax, VA 22030 USA.
   [Golden, M. L.; Chen, R. S.] Columbia Univ, SEDAC, Palisades, NY 10964 USA.
   [Pinzon, J. E.] Sci Syst & Applicat Inc, Lanham, MD 20706 USA.
   [Zaitchik, B.] Johns Hopkins Univ, Baltimore, MD 21218 USA.
   [Irwin, D.; Estes, S.; Luvall, J.] NASA, George C Marshall Space Flight Ctr, Huntsville, AL 35812 USA.
   [Wimberly, M.] S Dakota State Univ, Geog Informat Sci Ctr Excellence, Brookings, SD 57007 USA.
   [Xiao, X.] Univ Oklahoma, Ctr Spatial Anal, Norman, OK 73019 USA.
   [Charland, K. M.] Childrens Hosp, Informat Program, Boston, MA 02115 USA.
   [Stumpf, R. P.] NOAA, Natl Ocean Serv, Silver Spring, MD 20910 USA.
   [Deng, Z.] Louisiana State Univ, Civil & Environm Engn, Baton Rouge, LA 70803 USA.
   [Tilburg, C. E.] Univ New England, Biddeford, ME 04093 USA.
   [Liu, Y.] Emory Univ, Sch Publ Hlth, Atlanta, GA 30322 USA.
   [McClure, L.] Univ Alabama Birmingham, Birmingham, AL 35294 USA.
   [Huff, A.] Battelle Mem Inst, Columbus, OH 43201 USA.
RP Kempler, S (reprint author), NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
EM Steven.J.Kempler@nasa.gov; richard.kiang@nasa.gov;
   radina.p.soebiyanto@nasa.gov; quansong.tong@nasa.gov;
   pceccato@iri.columbia.edu; susan.maxwell@biomedware.com;
   Robert.rommel@biomedware.com; Jacquez@biomedware.com;
   kbene@edac.unm.edu; smorain@edac.unm.edu; mgolden@ciesin.columbia.edu;
   bchen@ciesin.columbia.edu; jorge.e.pinzon@nasa.gov; zaitchik@jhu.edu;
   dan.irwin@nasa.gov; sue.m.estes@nasa.gov; jluvall@nasa.gov;
   Michael.Wimberly@sdstate.edu; xiangming.xiao@ou.edu;
   richard.stumpf@noaa.gov; zdeng@lsu.edu; ctilburg@une.edu;
   yang.liu@emory.edu; LMcClure@ms.soph.uab.edu
NR 174
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Z9 0
U1 1
U2 2
PU A A BALKEMA PUBLISHERS
PI LEIDEN
PA SCHIPHOLWEG 107C, PO BOX 447, 2316 XC LEIDEN, NETHERLANDS
SN 1572-3348
BN 978-0-203-09327-6; 978-0-415-58471-5
J9 ISPRS BOOK SER
PY 2013
VL 11
BP 229
EP 291
PG 63
WC Public, Environmental & Occupational Health; Remote Sensing
SC Public, Environmental & Occupational Health; Remote Sensing
GA BC2MZ
UT WOS:000351090700008
ER

PT S
AU Morain, SA
   Kumar, S
   Stohlgren, TJ
   Selinus, O
   Steinnes, E
   Rosenberg, M
   Lo, M
AF Morain, S. A.
   Kumar, S.
   Stohlgren, T. J.
   Selinus, O.
   Steinnes, E.
   Rosenberg, M.
   Lo, M.
BE Morain, SA
   Budge, AM
TI Environmental modelling for health
SO ENVIRONMENTAL TRACKING FOR PUBLIC HEALTH SURVEILLANCE
SE International Society for Photogrammetry and Remote Sensing (ISPRS) Book
   Series
LA English
DT Article; Book Chapter
ID SPECIES DISTRIBUTION MODELS; PLASMODIUM-FALCIPARUM MALARIA; GENERALIZED
   ADDITIVE-MODELS; BIOCLIMATE ENVELOPE MODELS; SAMPLE SELECTION BIAS;
   PSEUDO-ABSENCE DATA; SUB-SAHARAN AFRICA; NICHE-BASED MODELS;
   CLIMATE-CHANGE; ECOLOGICAL-NICHE
AB This chapter highlights types of models and modelling strategies with a focus on environment and human health applications that link environmental triggers and subsequent disease exposures and risks. It reviews bio-geophysical modelling applications generally employed by environmental and health scientists, and by policy and decision making authorities.
C1 [Morain, S. A.] Univ New Mexico, Earth Data Anal Ctr, Albuquerque, NM 87131 USA.
   [Kumar, S.] Colorado State Univ, Dept Ecosyst Sci & Sustainabil, Nat Resource Ecol Lab, Ft Collins, CO 80523 USA.
   [Stohlgren, T. J.] US Geol Survey, Ft Collins Sci Ctr, Ft Collins, CO 80526 USA.
   [Selinus, O.] Geol Survey Sweden, Uppsala, Sweden.
   [Steinnes, E.] Norwegian Univ Sci & Technol, Dept Chem, NO-7491 Trondheim, Norway.
   [Rosenberg, M.] Queens Univ, Dept Geog, Kingston, ON K7L 3N6, Canada.
   [Lo, M.] CALTECH, Jet Prop Lab, Nav & Miss Design Sect, Pasadena, CA 91109 USA.
RP Morain, SA (reprint author), Univ New Mexico, Earth Data Anal Ctr, MSC01-1110, Albuquerque, NM 87131 USA.
EM smorain@edac.unm.edu; Sunil.Kumar@colostate.edu; stohlgrent@usgs.gov;
   olle.selinus@gmail.com; eiliv.steinnes@chem.ntnu.no;
   mark.rosenberg@queensu.ca; martin.lo@jpl.nasa.gov
NR 230
TC 0
Z9 0
U1 0
U2 1
PU A A BALKEMA PUBLISHERS
PI LEIDEN
PA SCHIPHOLWEG 107C, PO BOX 447, 2316 XC LEIDEN, NETHERLANDS
SN 1572-3348
BN 978-0-203-09327-6; 978-0-415-58471-5
J9 ISPRS BOOK SER
PY 2013
VL 11
BP 293
EP 332
PG 40
WC Public, Environmental & Occupational Health; Remote Sensing
SC Public, Environmental & Occupational Health; Remote Sensing
GA BC2MZ
UT WOS:000351090700009
ER

PT J
AU Kedar, S
   Tanaka, HKM
   Naudet, CJ
   Jones, CE
   Plaut, JP
   Webb, FH
AF Kedar, S.
   Tanaka, H. K. M.
   Naudet, C. J.
   Jones, C. E.
   Plaut, J. P.
   Webb, F. H.
TI Muon radiography for exploration of Mars geology
SO GEOSCIENTIFIC INSTRUMENTATION METHODS AND DATA SYSTEMS
LA English
DT Article
AB Muon radiography is a technique that uses naturally occurring showers of muons (penetrating particles generated by cosmic rays) to image the interior of large-scale geological structures in much the same way as standard X-ray radiography is used to image the interior of smaller objects. Recent developments and application of the technique to terrestrial volcanoes have demonstrated that a low-power, passive muon detector can peer deep into geological structures up to several kilometers in size, and provide crisp density profile images of their interior at ten meter scale resolution. Preliminary estimates of muon production on Mars indicate that the near horizontal Martian muon flux, which could be used for muon radiography, is as strong or stronger than that on Earth, making the technique suitable for exploration of numerous high priority geological targets on Mars. The high spatial resolution of muon radiography also makes the technique particularly suited for the discovery and delineation of Martian caverns, the most likely planetary environment for biological activity.
   As a passive imaging technique, muon radiography uses the perpetually present background cosmic ray radiation as the energy source for probing the interior of structures from the surface of the planet. The passive nature of the measurements provides an opportunity for a low power and low data rate instrument for planetary exploration that could operate as a scientifically valuable primary or secondary instrument in a variety of settings, with minimal impact on the mission's other instruments and operation.
C1 [Kedar, S.; Naudet, C. J.; Jones, C. E.; Plaut, J. P.; Webb, F. H.] CALTECH, Jet Prop Lab, Pasadena, CA 91125 USA.
   [Tanaka, H. K. M.] Univ Tokyo, Earthquake Res Inst, Tokyo 113, Japan.
RP Kedar, S (reprint author), CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91125 USA.
EM sharon.kedar@jpl.nasa.gov
FU National Aeronautics and Space Administration
FX The authors wish to thank the Associate for the thoughtful and
   constructive critique of the manuscript. This research was conducted in
   part at the Jet Propulsion Laboratory, California Institute of
   Technology, under contract with the National Aeronautics and Space
   Administration.
NR 32
TC 4
Z9 4
U1 1
U2 2
PU COPERNICUS GESELLSCHAFT MBH
PI GOTTINGEN
PA BAHNHOFSALLEE 1E, GOTTINGEN, 37081, GERMANY
SN 2193-0856
EI 2193-0864
J9 GEOSCI INSTRUM METH
JI Geosci. Instrum. Methods Data Syst.
PY 2013
VL 2
IS 1
BP 157
EP 164
DI 10.5194/gi-2-157-2013
PG 8
WC Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences
SC Geology; Meteorology & Atmospheric Sciences
GA V39PJ
UT WOS:000209422600019
ER

PT J
AU Merchant, CJ
   Matthiesen, S
   Rayner, NA
   Remedios, JJ
   Jones, PD
   Olesen, F
   Trewin, B
   Thorne, PW
   Auchmann, R
   Corlett, GK
   Guillevic, PC
   Hulley, GC
AF Merchant, C. J.
   Matthiesen, S.
   Rayner, N. A.
   Remedios, J. J.
   Jones, P. D.
   Olesen, F.
   Trewin, B.
   Thorne, P. W.
   Auchmann, R.
   Corlett, G. K.
   Guillevic, P. C.
   Hulley, G. C.
TI The surface temperatures of Earth: steps towards integrated
   understanding of variability and change
SO GEOSCIENTIFIC INSTRUMENTATION METHODS AND DATA SYSTEMS
LA English
DT Article
AB Surface temperature is a key aspect of weather and climate, but the term may refer to different quantities that play interconnected roles and are observed by different means. In a community-based activity in June 2012, the EarthTemp Network brought together 55 researchers from five continents to improve the interaction between scientific communities who focus on surface temperature in particular domains, to exploit the strengths of different observing systems and to better meet the needs of different communities. The workshop identified key needs for progress towards meeting scientific and societal requirements for surface temperature understanding and information, which are presented in this community paper. A "whole-Earth" perspective is required with more integrated, collaborative approaches to observing and understanding Earth's various surface temperatures. It is necessary to build understanding of the relationships between different surface temperatures, where presently inadequate, and undertake large-scale systematic intercomparisons. Datasets need to be easier to obtain and exploit for a wide constituency of users, with the differences and complementarities communicated in readily understood terms, and realistic and consistent uncertainty information provided. Steps were also recommended to curate and make available data that are presently inaccessible, develop new observing systems and build capacities to accelerate progress in the accuracy and usability of surface temperature datasets.
C1 [Merchant, C. J.] Univ Reading, Dept Meteorol, Reading, Berks, England.
   [Merchant, C. J.; Matthiesen, S.] Univ Edinburgh, Sch GeoSci, Edinburgh, Midlothian, Scotland.
   [Rayner, N. A.] MetOffice, Hadley Ctr, Exeter, Devon, England.
   [Remedios, J. J.; Corlett, G. K.] Univ Leicester, Phys & Astron, Leicester, Leics, England.
   [Jones, P. D.] Univ E Anglia, Climat Res Unit, Norwich NR4 7TJ, Norfolk, England.
   [Jones, P. D.] King Abdulaziz Univ, Dept Meteorol, Ctr Excellence Climate Change Res, Jeddah 21413, Saudi Arabia.
   [Olesen, F.] Karlsruhe Inst Technol, Inst Meteorol & Climate Res, D-76021 Karlsruhe, Germany.
   [Trewin, B.] Australian Bur Meteorol, Natl Climate Ctr, Melbourne, Vic, Australia.
   [Thorne, P. W.] Nansen Environm & Remote Sensing Ctr, Bergen, Norway.
   [Auchmann, R.] Univ Bern, Inst Geog, CH-3012 Bern, Switzerland.
   [Auchmann, R.] Univ Bern, Oeschger Ctr Climate Change Res, CH-3012 Bern, Switzerland.
   [Guillevic, P. C.] N Carolina State Univ, CICS, Asheville, NC USA.
   [Guillevic, P. C.] NOAA, Natl Climat Data Ctr, Asheville, NC USA.
   [Hulley, G. C.] CALTECH, Jet Prop Lab, Pasadena, CA USA.
RP Merchant, CJ (reprint author), Univ Reading, Dept Meteorol, Reading, Berks, England.
EM c.j.merchant@reading.ac.uk
RI Thorne, Peter/F-2225-2014
OI Thorne, Peter/0000-0003-0485-9798
FU NERC [NE/I030127/1]; NOAA through the Cooperative Institute for Climate
   and Satellites - North Carolina [NA09NES4400006]
FX This work was supported by NERC grant NE/I030127/1. Thorne and Guillevic
   acknowledge support by NOAA through the Cooperative Institute for
   Climate and Satellites - North Carolina under cooperative agreement
   NA09NES4400006. Auchmann received travel support through COST Action
   "HOME" (ES0601).
NR 81
TC 3
Z9 3
U1 0
U2 1
PU COPERNICUS GESELLSCHAFT MBH
PI GOTTINGEN
PA BAHNHOFSALLEE 1E, GOTTINGEN, 37081, GERMANY
SN 2193-0856
EI 2193-0864
J9 GEOSCI INSTRUM METH
JI Geosci. Instrum. Methods Data Syst.
PY 2013
VL 2
IS 2
BP 305
EP 321
DI 10.5194/gi-2-305-2013
PG 17
WC Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences
SC Geology; Meteorology & Atmospheric Sciences
GA V39PK
UT WOS:000209422700012
ER

PT S
AU Christian, JA
   D'Souza, CN
   Milenkovic, Z
   Johanning, R
AF Christian, John A.
   D'Souza, Christopher N.
   Milenkovic, Zoran
   Johanning, Rebecca
BE Hardaway, LR
TI CLOSED-LOOP TESTING OF THE ORION RENDEZVOUS GNC ALGORITHMS IN THE SPACE
   OPERATIONS SIMULATION CENTER
SO GUIDANCE AND CONTROL 2013
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 36th Annual American-Astronautical-Society Rocky Mountain Section
   Guidance and Control Conference
CY FEB 01-06, 2013
CL Rocky Mt Sect, Breckenridge, CO
SP Amer Astronaut Soc
HO Rocky Mt Sect
ID POSE ESTIMATION; OPENINGS
AB The Orion relative navigation team recently performed a series of closed-loop tests of the Orion rendezvous Guidance, Navigation, and Control (GNC) algorithms with sensor hardware-in-the-loop at the Lockheed Martin Space Operations Simulation Center (LM-SOSC). These tests used a Vision Navigation Sensor (VNS) Flash LIDAR to observe a high-fidelity mock-up of the International Space Station (ISS), while driving a large 6-DOF robot capable of simulating the closest 60 m of the rendezvous. Through this setup, the team was able to successfully demonstrate closed-loop performance of an autonomous rendezvous with a cooperative target in a realistic environment. This paper will provide a detailed discussion of the key flight software components, including: (1) the NASA-developed reflector finding, reflector identification/tracking, and pose algorithms; (2) the relative navigation extended Kalman Filter; and (3) the guidance algorithms for final approach. Important lessons-learned from this test campaign will also be documented. Finally, performance results from these closed loop runs will be provided.
C1 [Christian, John A.; D'Souza, Christopher N.; Johanning, Rebecca] NASA, Johnson Space Ctr, GNC Autonomous Flight Syst Branch, Houston, TX 77058 USA.
   [Milenkovic, Zoran] Charles Stark Draper Lab Inc, Houston, TX 77058 USA.
RP Christian, JA (reprint author), NASA, Johnson Space Ctr, GNC Autonomous Flight Syst Branch, Houston, TX 77058 USA.
NR 13
TC 0
Z9 0
U1 1
U2 1
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-601-2
J9 ADV ASTRONAUT SCI
PY 2013
VL 149
BP 183
EP 200
PG 18
WC Automation & Control Systems; Engineering, Aerospace
SC Automation & Control Systems; Engineering
GA BE9HH
UT WOS:000377554800012
ER

PT S
AU Johnson, A
   Bergh, C
   Cheng, Y
   Clouse, D
   Gostelow, K
   Ishikawa, K
   Katake, A
   Klaasen, K
   Mandic, M
   Morales, M
   Park, S
   Sirota, A
   Spiers, G
   Trawny, N
   Waters, J
   Wolf, A
   Zheng, JS
   Zheng, W
AF Johnson, Andrew
   Bergh, Chuck
   Cheng, Yang
   Clouse, Dan
   Gostelow, Kim
   Ishikawa, Keizo
   Katake, Anup
   Klaasen, Ken
   Mandic, Milan
   Morales, Mishrahim
   Park, Sung
   Sirota, Al
   Spiers, Gary
   Trawny, Nikolas
   Waters, John
   Wolf, Aron
   Zheng, Jason
   Zheng, Will
BE Hardaway, LR
TI DESIGN AND GROUND TEST RESULTS FOR THE LANDER VISION SYSTEM
SO GUIDANCE AND CONTROL 2013
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 36th Annual American-Astronautical-Society Rocky Mountain Section
   Guidance and Control Conference
CY FEB 01-06, 2013
CL Rocky Mt Sect, Breckenridge, CO
SP Amer Astronaut Soc
HO Rocky Mt Sect
AB The Lander Vision System (LVS) is a tightly integrated bolt-on smart sensor system that provides real-time terrain relative position, velocity, attitude and altitude while also detecting landing hazards. The LVS can increase access to scientifically rich landing sites and is a low mass, volume and cost alternative to radar-based landing sensors. The LVS hardware fuses measurements from a visible camera, flash lidar and inertial measurement unit using a terrain relative navigation filter operating on a high performance compute element. This paper describes the design of an LVS prototype created from commercial components with a path to flight implementation and describes initial terrain relative navigation results produced on the computing hardware.
C1 [Johnson, Andrew; Bergh, Chuck; Cheng, Yang; Clouse, Dan; Gostelow, Kim; Ishikawa, Keizo; Katake, Anup; Klaasen, Ken; Mandic, Milan; Morales, Mishrahim; Park, Sung; Sirota, Al; Spiers, Gary; Trawny, Nikolas; Waters, John; Wolf, Aron; Zheng, Jason; Zheng, Will] CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
RP Johnson, A (reprint author), CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
NR 12
TC 1
Z9 1
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-601-2
J9 ADV ASTRONAUT SCI
PY 2013
VL 149
BP 235
EP 248
PG 14
WC Automation & Control Systems; Engineering, Aerospace
SC Automation & Control Systems; Engineering
GA BE9HH
UT WOS:000377554800015
ER

PT S
AU Merancy, N
   Chevray, K
   Gonzalez, R
   Madsen, J
   Spehar, P
AF Merancy, Nujoud
   Chevray, Kay
   Gonzalez, Rodolfo
   Madsen, Jennifer
   Spehar, Pete
BE Hardaway, LR
TI CONTROL REQUIREMENTS TO SUPPORT MANUAL PILOTING CAPABILITY
SO GUIDANCE AND CONTROL 2013
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 36th Annual American-Astronautical-Society Rocky Mountain Section
   Guidance and Control Conference
CY FEB 01-06, 2013
CL Rocky Mt Sect, Breckenridge, CO
SP Amer Astronaut Soc
HO Rocky Mt Sect
AB The manual piloting requirements specified under the NASA Constellation Program involved Cooper-Harper ratings, which are a qualitative and subjective evaluation from experienced pilots. This type of verification entails a significant investment of resources to assess a completed design and is not one that can easily or meaningfully be applied upfront in the design phase. The evolution of the Multi-Purpose Crew Vehicle Program to include an independently developed propulsion system from an international partner makes application of Cooper-Harper based design requirements inadequate.
   To mitigate this issue, a novel solution was developed to reformulate the necessary piloting capability into quantifiable requirements. A trio of requirements was designed which specify control authority, precision, and impulse residuals enabling propulsion design within specified guidance and control boundaries. These requirements have been evaluated against both the existing Orion design and the proposed ESA design and have been found to achieve the desired specificity. The requirement set is capable of being applied to the development of other spacecraft in support of manual piloting.
C1 [Merancy, Nujoud] Orion MPCV Program Vehicle Integrat Off, London, England.
   [Chevray, Kay; Gonzalez, Rodolfo; Madsen, Jennifer; Spehar, Pete] NASA, Johnson Space Ctr, Houston, TX USA.
   [Chevray, Kay; Gonzalez, Rodolfo; Madsen, Jennifer; Spehar, Pete] Engn Directorate, Houston, TX USA.
RP Merancy, N (reprint author), Orion MPCV Program Vehicle Integrat Off, London, England.
EM merancy_nujoud@bah.com; keiko.chevray@nasa.gov;
   rodolfo.a.gonzalez@nasa.gov; jennifer.m.madsen@nasa.gov;
   peter.t.spehar@nasa.gov
NR 2
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-601-2
J9 ADV ASTRONAUT SCI
PY 2013
VL 149
BP 309
EP 315
PG 7
WC Automation & Control Systems; Engineering, Aerospace
SC Automation & Control Systems; Engineering
GA BE9HH
UT WOS:000377554800020
ER

PT S
AU Leonard, JM
   Parker, JS
   Anderson, RL
   McGranaghan, RM
   Fujimoto, K
   Born, GH
AF Leonard, Jason M.
   Parker, Jeffrey S.
   Anderson, Rodney L.
   McGranaghan, Ryan M.
   Fujimoto, Kohei
   Born, George H.
BE Hardaway, LR
TI SUPPORTING CREWED LUNAR EXPLORATION WITH LIAISON NAVIGATION
SO GUIDANCE AND CONTROL 2013
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 36th Annual American-Astronautical-Society Rocky Mountain Section
   Guidance and Control Conference
CY FEB 01-06, 2013
CL Rocky Mt Sect, Breckenridge, CO
SP Amer Astronaut Soc
HO Rocky Mt Sect
ID MISSION
AB This paper examines the benefits of navigating a crewed vehicle between the Earth and the Moon using both ground tracking and satellite-to-satellite tracking. Linked Autonomous Interplanetary Satellite Orbit Navigation (LiAISON) is a new technique that has been shown to dramatically improve the navigation of lunar satellites, libration orbiters, and Earth orbiting satellites using scalar intersatellite observations. In this paper, LiAISON is applied to the problem of navigating a crewed vehicle to the Moon. It has been found that LiAISON observations improve the navigation accuracy enough to reduce the number of active ground tracking stations from six to three.
C1 [Leonard, Jason M.; Parker, Jeffrey S.; McGranaghan, Ryan M.; Fujimoto, Kohei; Born, George H.] Univ Colorado, Colorado Ctr Astrodynam Res, Boulder, CO 80309 USA.
   [Anderson, Rodney L.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
RP Leonard, JM (reprint author), Univ Colorado, Colorado Ctr Astrodynam Res, Boulder, CO 80309 USA.
OI Anderson, Rodney/0000-0001-5336-2775
NR 27
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-601-2
J9 ADV ASTRONAUT SCI
PY 2013
VL 149
BP 327
EP 340
PG 14
WC Automation & Control Systems; Engineering, Aerospace
SC Automation & Control Systems; Engineering
GA BE9HH
UT WOS:000377554800022
ER

PT S
AU Foster, CW
   Brazzel, JP
   Spehar, PT
   Clarkt, FD
   Eldridge, E
AF Foster, Christopher W.
   Brazzel, Jack P.
   Spehar, Peter T.
   Clarkt, Fred D.
   Eldridge, Erin
BE Hardaway, LR
TI THE RENDEZVOUS MONITORING DISPLAY CAPABILITIES OF THE RENDEZVOUS AND
   PROXIMITY OPERATIONS PROGRAM
SO GUIDANCE AND CONTROL 2013
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 36th Annual American-Astronautical-Society Rocky Mountain Section
   Guidance and Control Conference
CY FEB 01-06, 2013
CL Rocky Mt Sect, Breckenridge, CO
SP Amer Astronaut Soc
HO Rocky Mt Sect
AB The Rendezvous and Proximity Operations Program (RPOP) is a laptop computer -based relative navigation tool and piloting aid that was developed during the Space Shuttle program. RPOP displays a graphical representation of the relative motion between the target and chaser vehicles in a rendezvous, proximity operations and capture scenario. After being used in over 60 Shuttle rendezvous missions, some of the RPOP display concepts have become recognized as a minimum standard for cockpit displays for monitoring the rendezvous task. To support International Space Station (ISS) based crews in monitoring incoming visiting vehicles, RPOP has been modified to allow crews to compare the Cygnus visiting vehicle's onboard navigated state to processed range measurements from an ISS-based, crew-operated Hand Held Lidar sensor. This paper will discuss the display concepts of RPOP that have proven useful in performing and monitoring rendezvous and proximity operations.
C1 [Foster, Christopher W.] Jacobs Engn, On Orbit GN&C, 2224 Bay Area Blvd, Houston, TX 77058 USA.
   [Brazzel, Jack P.; Spehar, Peter T.] NASA, Lyndon B Johnson Space Ctr, GN&C Autonomous Flight Syst Branch, Houston, TX 77058 USA.
   [Clarkt, Fred D.] Charles Stark Draper Lab, Dynam Syst & Control Div, Houston, TX 77058 USA.
RP Foster, CW (reprint author), Jacobs Engn, On Orbit GN&C, 2224 Bay Area Blvd, Houston, TX 77058 USA.
NR 3
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-601-2
J9 ADV ASTRONAUT SCI
PY 2013
VL 149
BP 365
EP 377
PG 13
WC Automation & Control Systems; Engineering, Aerospace
SC Automation & Control Systems; Engineering
GA BE9HH
UT WOS:000377554800025
ER

PT S
AU Aung, M
   Acikmese, B
   Johnson, A
   Regehr, M
   Casoliva, J
   Mohan, S
   Wolf, A
   Scharf, D
   Ansari, H
   Masten, D
   Scotkin, J
   Nietfeld, S
AF Aung, Mimi
   Acikmese, Behcet
   Johnson, Andrew
   Regehr, Martin
   Casoliva, Jordi
   Mohan, Swati
   Wolf, Aron
   Scharf, Daniel
   Ansari, Homayoon
   Masten, David
   Scotkin, Joel
   Nietfeld, Scott
BE Hardaway, LR
TI ADAPT - A CLOSED-LOOP TESTBED FOR NEXT-GENERATION EDL GN&C SYSTEMS
SO GUIDANCE AND CONTROL 2013
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 36th Annual American-Astronautical-Society Rocky Mountain Section
   Guidance and Control Conference
CY FEB 01-06, 2013
CL Rocky Mt Sect, Breckenridge, CO
SP Amer Astronaut Soc
HO Rocky Mt Sect
AB A next-generation Mars landing goal is precise and safe landing with less than 1 km uncertainty to reach targets of scientific interest within hazardous terrain. This goal can be achieved by enhancing the SkyCrane Entry, Descent and Landing (EDL) architecture debuted successfully by the Mars Science Laboratory [1], by adding: (i) Terrain Relative Navigation (TRN) during the parachute phase to determine the vehicle position and attitude relative to the landing site; (ii) capability to maneuver the spacecraft to reach the exact target site, requiring a course correction of multiple kilometers during the powered descent phase; and (iii) Hazard Detection and Avoidance (HDA) in the landing area [2]. JPL is developing key technologies to enable such landings at Mars, including Guidance for Fuel-Optimal Large Divert (G-FOLD) [3][4], a trajectory optimizer suitable for on-board execution, and the Mars Lander Vision System (LVS) [5] for TRN and hazard detection. Reliable operation at Mars necessitates earth-based, end-to-end closed loop testing of these technologies as an integrated system. ADAPT (Autonomous Ascent and Descent Powered-Flight Testbed) is a testbed for this purpose. In ADAPT, JPL Mars Lander Vision System and a payload computer will be integrated into the Xombie vehicle built by Masten Space Systems, Inc. In flight, the JPL payload will perform TRN, and execute G-FOLD [6] to calculate a fuel-optimal trajectory to the landing site. The Xombie vehicle will follow the trajectory to the landing site. System engineering is performed collaboratively by JPL and Masten Space Systems, Inc. We began ADAPT development by first flying with Xombie three Mars-representative large-divert trajectories generated before launch using G-FOLD. This first phase was highly successful. The Xombie vehicle diverted 750-m laterally during descent from 500-m initial altitude with high precision and set a new record for the lateral flight distance performed by a vertical-take-off-vertical-landing vehicle, and set new altitude and distance records for Xombie vehicle. In upcoming flights, we will continue to add features to the testbed and demonstrate a fully autonomous Mars-like precise and safe landing with TRN, G-FOLD and HDA. This paper details the ADAPT testbed design and the planned set of experiments.
C1 [Aung, Mimi] CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
   [Acikmese, Behcet] Univ Texas Austin, Austin, TX 78712 USA.
   [Masten, David] Masten Space Syst Inc, Mojave, CA 93501 USA.
RP Aung, M (reprint author), CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
NR 16
TC 1
Z9 1
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-601-2
J9 ADV ASTRONAUT SCI
PY 2013
VL 149
BP 469
EP 488
PG 20
WC Automation & Control Systems; Engineering, Aerospace
SC Automation & Control Systems; Engineering
GA BE9HH
UT WOS:000377554800032
ER

PT S
AU Dillman, RA
   Gsellt, VT
   Bowdent, EL
AF Dillman, Robert A.
   Gsellt, Valerie T.
   Bowdent, Ernest L.
BE Hardaway, LR
TI ATTITUDE CONTROL PERFORMANCE OF IRVE-3
SO GUIDANCE AND CONTROL 2013
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 36th Annual American-Astronautical-Society Rocky Mountain Section
   Guidance and Control Conference
CY FEB 01-06, 2013
CL Rocky Mt Sect, Breckenridge, CO
SP Amer Astronaut Soc
HO Rocky Mt Sect
AB The Inflatable Reentry Vehicle Experiment 3 (IRVE-3) launched July 23, 2012, from NASA Wallops Flight Facility and successfully performed its mission, demonstrating both the survivability of a hypersonic inflatable aerodynamic decelerator in the reentry heating environment and the effect of an offset center of gravity on the aeroshell's flight L/D. The reentry vehicle separated from the launch vehicle, released and inflated its aeroshell, reoriented for atmospheric entry, and mechanically shifted its center of gravity before reaching atmospheric interface. Performance data from the entire mission was telemetered to the ground for analysis. This paper discusses the IRVE-3 mission scenario, reentry vehicle design, and as-flown performance of the attitude control system in the different phases of the mission.
C1 [Dillman, Robert A.] NASA, Langley Res Ctr, IRVE Chief Engn 3, Hampton, VA 23681 USA.
   [Gsellt, Valerie T.; Bowdent, Ernest L.] NASA Wallops Flight Facil, NASA Sounding Rocket Operat Contract, Orbital Sci Corp, Wallops Isl, VA 23337 USA.
RP Dillman, RA (reprint author), NASA, Langley Res Ctr, IRVE Chief Engn 3, Hampton, VA 23681 USA.
EM Robert.A.Dillman@nasa.gov; Valerie.Gsell@nasa.gov;
   Emest.L.Bowden@nasa.gov
NR 0
TC 0
Z9 0
U1 1
U2 1
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-601-2
J9 ADV ASTRONAUT SCI
PY 2013
VL 149
BP 489
EP 506
PG 18
WC Automation & Control Systems; Engineering, Aerospace
SC Automation & Control Systems; Engineering
GA BE9HH
UT WOS:000377554800033
ER

PT S
AU Little, A
   Bose, D
   Karlgaard, C
   Munk, M
   Kuhl, C
   Schoenenberger, M
   Antill, C
   Verhappen, R
   Kutty, P
   White, T
AF Little, Alan
   Bose, Deepak
   Karlgaard, Chris
   Munk, Michelle
   Kuhl, Chris
   Schoenenberger, Mark
   Antill, Chuck
   Verhappen, Ron
   Kutty, Prasad
   White, Todd
BE Hardaway, LR
TI THE MARS SCIENCE LABORATORY (MSL) ENTRY, DESCENT AND LANDING
   INSTRUMENTATION (MEDLI): HARDWARE PERFORMANCE AND DATA RECONSTRUCTION
SO GUIDANCE AND CONTROL 2013
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 36th Annual American-Astronautical-Society Rocky Mountain Section
   Guidance and Control Conference
CY FEB 01-06, 2013
CL Rocky Mt Sect, Breckenridge, CO
SP Amer Astronaut Soc
HO Rocky Mt Sect
AB The Mars Science Laboratory (MSL) Entry, Descent and Landing Instrumentation (MEDLI) hardware was a first-of-its-kind sensor system that gathered temperature and pressure readings on the MSL heatshield during Mars entry on August 6, 2012. MEDLI began as challenging instrumentation problem, and has been a model of collaboration across multiple NASA organizations. After the culmination of almost 6 years of effort, the sensors performed extremely well, collecting data from before atmospheric interface through parachute deploy. This paper will summarize the history of the MEDLI project and hardware development, including key lessons learned that can apply to future instrumentation efforts. MEDLI returned an unprecedented amount of high-quality engineering data from a Mars entry vehicle. We will present the performance of the 3 sensor types: pressure, temperature, and isotherm tracking, as well as the performance of the custom-built sensor support electronics. A key component throughout the MEDLI project has been the ground testing and analysis effort required to understand the returned flight data. Although data analysis is ongoing through 2013, this paper will reveal some of the early findings on the aerothermodynamic environment that MSL encountered at Mars, the response of the heatshield material to that heating environment, and the aerodynamic performance of the entry vehicle. The MEDLI data results promise to challenge our engineering assumptions and revolutionize the way we account for margins in entry vehicle design.
C1 [Little, Alan; Munk, Michelle; Kuhl, Chris; Schoenenberger, Mark; Antill, Chuck] NASA, Langley Res Ctr, Mail Stop 489, Hampton, VA 23681 USA.
   [Bose, Deepak] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
   [Karlgaard, Chris; Verhappen, Ron] Sci Syst & Applicat Inc, Hampton, VA 23666 USA.
   [Kutty, Prasad] Analyt Mech Associates, Hampton, VA 23681 USA.
   [White, Todd] ERC Inc, Moffett Field, CA 94035 USA.
RP Little, A (reprint author), NASA, Langley Res Ctr, Mail Stop 489, Hampton, VA 23681 USA.
NR 8
TC 0
Z9 0
U1 0
U2 1
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-601-2
J9 ADV ASTRONAUT SCI
PY 2013
VL 149
BP 507
EP 522
PG 16
WC Automation & Control Systems; Engineering, Aerospace
SC Automation & Control Systems; Engineering
GA BE9HH
UT WOS:000377554800034
ER

PT S
AU Winternitz, LMB
   Gendreau, KC
   Hassouneh, MA
   Mitchell, JW
   Fong, WH
   Lee, WT
   Gavriil, F
   Arzoumanian, Z
AF Winternitz, Luke M. B.
   Gendreau, Keith C.
   Hassouneh, Munther A.
   Mitchell, Jason W.
   Fong, Wai H.
   Lee, Wing-Tsz
   Gavriil, Fotis
   Arzoumanian, Zaven
BE Hardaway, LR
TI THE ROLE OF X-RAYS IN FUTURE SPACE NAVIGATION AND COMMUNICATION
SO GUIDANCE AND CONTROL 2013
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 36th Annual American-Astronautical-Society Rocky Mountain Section
   Guidance and Control Conference
CY FEB 01-06, 2013
CL Rocky Mt Sect, Breckenridge, CO
SP Amer Astronaut Soc
HO Rocky Mt Sect
AB In the near future, applications using X-rays will enable autonomous navigation and time distribution throughout the solar system, high capacity and low power space data links, highly accurate attitude sensing, and extremely high precision formation flying capabilities. Each of these applications alone has the potential to revolutionize mission capabilities, particularly beyond Earth orbit. This paper will outline the NASA Goddard Space Flight Center vision and efforts toward realizing the full potential of X-ray navigation and communications.
C1 [Winternitz, Luke M. B.; Gendreau, Keith C.; Hassouneh, Munther A.; Mitchell, Jason W.; Fong, Wai H.; Lee, Wing-Tsz] NASA, Goddard Space Flight Ctr, Code 596, Greenbelt, MD 20771 USA.
   [Gavriil, Fotis; Arzoumanian, Zaven] NASA, CRESST, GSFC UMBC 662, Columbia, MD 21044 USA.
RP Winternitz, LMB (reprint author), NASA, Goddard Space Flight Ctr, Code 596, Greenbelt, MD 20771 USA.
EM luke.b.winternitz@nasa.gov; keith.c.gendreau@nasa.gov;
   monther.a.hasouneh@nasa.gov; jason.w.mitchell@nasa.gov;
   wai.h.fong@nasa.gov; wing-tsz.lee-1@nasa.gov; fotis.gavriil@nasa.gov;
   zaven.arzoumanian@nasa.gov
NR 28
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-601-2
J9 ADV ASTRONAUT SCI
PY 2013
VL 149
BP 537
EP 551
PG 15
WC Automation & Control Systems; Engineering, Aerospace
SC Automation & Control Systems; Engineering
GA BE9HH
UT WOS:000377554800036
ER

PT S
AU Wood, LJ
   Bhaskaran, S
   Border, JS
   Byrnes, DV
   Cangahuala, LA
   Ely, TA
   Folkner, WM
   Naudet, CJ
   Owen, WM
   Riedel, JE
   Sims, JA
   Wilson, RS
AF Wood, Lincoln J.
   Bhaskaran, Shyam
   Border, James S.
   Byrnes, Dennis V.
   Cangahuala, Laureano A.
   Ely, Todd A.
   Folkner, William M.
   Naudet, Charles J.
   Owen, William M.
   Riedel, Joseph E.
   Sims, Jon A.
   Wilson, Roby S.
BE Hardaway, LR
TI NAVIGATION AND MISSION DESIGN TECHNOLOGIES FOR FUTURE PLANETARY SCIENCE
   MISSIONS
SO GUIDANCE AND CONTROL 2013
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 36th Annual American-Astronautical-Society Rocky Mountain Section
   Guidance and Control Conference
CY FEB 01-06, 2013
CL Rocky Mt Sect, Breckenridge, CO
SP Amer Astronaut Soc
HO Rocky Mt Sect
ID DEEP SPACE NAVIGATION; TRACKING
AB Future planetary explorations envisioned by the National Research Council's Vision and Voyages for Planetary Science in the Decade 2013-2022 seek to reach targets of broad scientific interest across the solar system. Advancements in guidance, navigation, and control and mission design ranging from software and algorithm development to new sensors will be necessary to enable these future missions. This paper describes the general categories of mission design capabilities that need further development in support of future planetary science missions: multiple-encounter tour design, close-proximity trajectory design for small-body missions, low-energy trajectory design and optimization, multiple-spacecraft trajectory optimization, and low-thrust trajectory design and optimization. The paper also describes a number of ways in which deep space navigation may be enhanced in the future, including precise one-way radio metric tracking, based on use of the proposed Deep Space Atomic Clock; autonomous navigation (in particular, its application to autonomous aerobraking, outer planet tours, and primitive body/lunar proximity operations and pinpoint landing); evolutionary improvements in Deep Space Network radio metric data accuracy; and derivation of metric tracking data from optical communication links.
C1 [Wood, Lincoln J.; Bhaskaran, Shyam; Byrnes, Dennis V.; Cangahuala, Laureano A.; Ely, Todd A.; Folkner, William M.; Owen, William M.; Sims, Jon A.; Wilson, Roby S.] CALTECH, Miss Design & Nav Sect, Jet Prop Lab, Mail Stop 301-121,4800 Oak Grove Dr, Pasadena, CA 91109 USA.
   [Border, James S.; Naudet, Charles J.] CALTECH, Tracking Syst & Applicat Sect, Jet Prop Lab, Pasadena, CA 91125 USA.
   [Riedel, Joseph E.] CALTECH, Guidance & Control Sect, Jet Prop Lab, Pasadena, CA 91125 USA.
RP Wood, LJ (reprint author), CALTECH, Miss Design & Nav Sect, Jet Prop Lab, Mail Stop 301-121,4800 Oak Grove Dr, Pasadena, CA 91109 USA.
NR 25
TC 1
Z9 1
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-601-2
J9 ADV ASTRONAUT SCI
PY 2013
VL 149
BP 577
EP 597
PG 21
WC Automation & Control Systems; Engineering, Aerospace
SC Automation & Control Systems; Engineering
GA BE9HH
UT WOS:000377554800039
ER

PT S
AU Berry, K
   Sutter, B
   May, A
   Williams, K
   Barbee, BW
   Beckman, M
   Williams, B
AF Berry, Kevin
   Sutter, Brian
   May, Alex
   Williams, Ken
   Barbee, Brent W.
   Beckman, Mark
   Williams, Bobby
BE Hardaway, LR
TI OSIRIS-REX TOUCH-AND-GO (TAG) MISSION DESIGN AND ANALYSIS
SO GUIDANCE AND CONTROL 2013
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 36th Annual American-Astronautical-Society Rocky Mountain Section
   Guidance and Control Conference
CY FEB 01-06, 2013
CL Rocky Mt Sect, Breckenridge, CO
SP Amer Astronaut Soc
HO Rocky Mt Sect
AB The Origins Spectral Interpretation Resource Identification Security Regolith Explorer (OSIRIS-REx) mission is a NASA New Frontiers mission launching in 2016 to rendezvous with the near-Earth asteroid (101955) 1999 RQ(36) in late 2018. After several months in formation with and orbit about the asteroid, OSIRIS-REx will fly a Touch-And-Go (TAG) trajectory to the asteroid's surface to obtain a regolith sample. This paper describes the mission design of the TAG sequence and the propulsive maneuvers required to achieve the trajectory. This paper also shows preliminary results of orbit covariance analysis and Monte-Carlo analysis that demonstrate the ability to arrive at a targeted location on the surface of RQ36 within a 25 meter radius with 98.3% confidence.
C1 [Berry, Kevin; Barbee, Brent W.] NASA, GSFC, Code 595,8800 Greenbelt Rd, Greenbelt, MD 20771 USA.
   [Sutter, Brian] Lockheed Martin Space Syst Co, Syst Engn, Mission Design, Denver, CO 80201 USA.
   [May, Alex] Lockheed Martin Space Syst Co, Syst Engn, Littleton, CO 80125 USA.
   [Williams, Ken] KinetX Inc, OSIRIS REx Mission, Space Nav & Flight Dynam SNAFD Practice, Simi Valley, CA 93065 USA.
   [Beckman, Mark] NASA GSFC, OSIRIS REx Mission, Greenbelt, MD 20771 USA.
   [Williams, Bobby] KinetX Inc, Space Nav & Flight Dynam SNAFD Practice, SNAFD, Simi Valley, CA 93065 USA.
RP Berry, K (reprint author), NASA, GSFC, Code 595,8800 Greenbelt Rd, Greenbelt, MD 20771 USA.
NR 3
TC 2
Z9 2
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-601-2
J9 ADV ASTRONAUT SCI
PY 2013
VL 149
BP 667
EP 678
PG 12
WC Automation & Control Systems; Engineering, Aerospace
SC Automation & Control Systems; Engineering
GA BE9HH
UT WOS:000377554800044
ER

PT S
AU Aldrich, J
   Bayard, D
   Mandic, M
AF Aldrich, Jack
   Bayard, David
   Mandic, Milan
BE Hardaway, LR
TI SPACECRAFT REORIENTATION CONTROL ANALYSIS FOR TOUCH-AND-GO COMET SAMPLE
   RETURN
SO GUIDANCE AND CONTROL 2013
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 36th Annual American-Astronautical-Society Rocky Mountain Section
   Guidance and Control Conference
CY FEB 01-06, 2013
CL Rocky Mt Sect, Breckenridge, CO
SP Amer Astronaut Soc
HO Rocky Mt Sect
ID SYSTEM
AB This article revisits the large-angle spacecraft reorientation attitude control problem from the perspective of maximizing the disturbance rejection capacity with respect to the maneuver time. To ensure stable reorientation, a smooth attitude trajectory command is profiled to match the estimated initial state and the desired final state of the spacecraft; with command following provided by state-feedback control. In this setting, the closed-loop tracking error dynamics are shown to belong to a class of nonlinear systems consisting of nominal linear time-varying system plus a set of structured time-varying nonlinearities which can be constructed to vanish at the origin under certain conditions. This property allows the concept of eigenvalue extension of linear time-varying systems to be applied in the interpretation of the results. An example problem, motivated by a comet sample return mission prototype, is given to demonstrate the sensitivity of the disturbance rejection capacity to maneuver time. The results reinforce the notion that large-angle spacecraft reorientation should place a premium on finesse (i.e., smooth, bounded motion), rather than speed (i.e., minimum time control).
C1 [Aldrich, Jack; Bayard, David; Mandic, Milan] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
RP Aldrich, J (reprint author), CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
NR 12
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-601-2
J9 ADV ASTRONAUT SCI
PY 2013
VL 149
BP 679
EP 692
PG 14
WC Automation & Control Systems; Engineering, Aerospace
SC Automation & Control Systems; Engineering
GA BE9HH
UT WOS:000377554800045
ER

PT S
AU Brugarolas, P
   Alexander, J
   Bayard, D
   Boussalis, D
   Boyles, M
   Litty, E
   Goullioud, R
   Mohan, S
   Ploen, S
   Wette, M
   Rahman, Z
   Ess, K
   Magrudert, D
AF Brugarolas, P.
   Alexander, J.
   Bayard, D.
   Boussalis, D.
   Boyles, M.
   Litty, E.
   Goullioud, R.
   Mohan, S.
   Ploen, S.
   Wette, M.
   Rahman, Z.
   Ess, K.
   Magrudert, D.
BE Hardaway, LR
TI THE OpTIIX POINTING CONTROL SYSTEM
SO GUIDANCE AND CONTROL 2013
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 36th Annual American-Astronautical-Society Rocky Mountain Section
   Guidance and Control Conference
CY FEB 01-06, 2013
CL Rocky Mt Sect, Breckenridge, CO
SP Amer Astronaut Soc
HO Rocky Mt Sect
AB The Optical Testbed and Integration on ISS eXperiment (OpTIIX) is a modularized, actively controlled, robotically assembled, scalable, segmented telescope architecture to be demonstrated on the International Space Station (ISS). This paper describes the OpTIIX Pointing Control System (PCS). The PCS has three pointing stages: a 3-axis gimbal that points the entire telescope, and two steering mirrors within the telescope (a coarse steering mirror at a pupil and a fine steering tertiary). The gimbal stage is controlled using the telescope attitude estimates derived from a Star Tracker and Inertial Measurement Unit (IMU) mounted on the telescope base. The coarse steering mirror compensates for the residual gimbal attitude errors as sensed by the star tracker and gyro. The fine steering tertiary is in a high frequency line-of-sight stabilization loop that uses a fine guidance sensor within the telescope instrument.
C1 [Rahman, Z.] CALTECH, NASA, Jet Prop Lab, Pasadena, CA 91109 USA.
   [Magrudert, D.] NASA, Johnson Space Ctr, Houston, TX 77058 USA.
NR 3
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-601-2
J9 ADV ASTRONAUT SCI
PY 2013
VL 149
BP 847
EP 857
PG 11
WC Automation & Control Systems; Engineering, Aerospace
SC Automation & Control Systems; Engineering
GA BE9HH
UT WOS:000377554800056
ER

PT S
AU Aldrich, J
   Brugarolas, P
   Lanzi, J
   Stuchlik, D
   Traub, W
   Unwin, S
AF Aldrich, J.
   Brugarolas, P.
   Lanzi, J.
   Stuchlik, D.
   Traub, W.
   Unwin, S.
BE Hardaway, LR
TI STRATOSPHERIC BALLOON-BORNE TELESCOPE MODELING AND PRECISION-POINTING
SO GUIDANCE AND CONTROL 2013
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 36th Annual American-Astronautical-Society Rocky Mountain Section
   Guidance and Control Conference
CY FEB 01-06, 2013
CL Rocky Mt Sect, Breckenridge, CO
SP Amer Astronaut Soc
HO Rocky Mt Sect
AB A major hurdle in reducing the perceived risk of flying balloon-borne precision-pointing telescope missions has been in validating the imposition of the gondola dynamics on the accuracy with which an instrument can be kept pointed at a celestial target. For purposes of mitigating this risk, this paper introduces a closed-loop dynamic modeling framework that is relevant for precision-pointing control of sub-orbital balloon-borne telescopes. The model is designed to support a multi-stage pointing architecture comprising: a balloon-mounted cable-suspended gondola, a course azimuth control system, a multi-axis nested gimbal frame structure with sub-arcsec stability, and a fine-guidance stage consisting of both a telescope-mounted angular rate sensor and guide CCDs in the focal plane to drive a Fast-Steering Mirror. Although a general nonlinear dynamic simulation model is assumed, our chosen parameterization exploits the fact the geometry of the flight train is nominally aligned with gravity, thereby facilitating the model linearization step. Nonlinear simulation trades are also included for purposes of capturing the nonlinear components of the control hardware as well as the pathological effects due to bearing rumble, mass-imbalances, and frozen-cable effects. We discuss the results of these pointing simulation tests in terms of the system-level design constraints that would support a mission to characterize exoplanet systems by direct imaging.
C1 [Aldrich, J.; Brugarolas, P.; Traub, W.; Unwin, S.] CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91009 USA.
   [Lanzi, J.; Stuchlik, D.] Goddard Space Flight Ctr, Wallops Flight Facil, Wallops Isl, VA 23337 USA.
RP Aldrich, J (reprint author), CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91009 USA.
NR 14
TC 0
Z9 0
U1 1
U2 1
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-601-2
J9 ADV ASTRONAUT SCI
PY 2013
VL 149
BP 859
EP 871
PG 13
WC Automation & Control Systems; Engineering, Aerospace
SC Automation & Control Systems; Engineering
GA BE9HH
UT WOS:000377554800057
ER

PT S
AU Gay, RS
   Stachowiak, S
   Smith, K
AF Gay, Robert S.
   Stachowiak, Susan
   Smith, Kelly
BE Hardaway, LR
TI ORION EXPLORATION FLIGHT TEST-1 CONTINGENCY DROGUE DEPLOY VELOCITY
   TRIGGER
SO GUIDANCE AND CONTROL 2013
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 36th Annual American-Astronautical-Society Rocky Mountain Section
   Guidance and Control Conference
CY FEB 01-06, 2013
CL Rocky Mt Sect, Breckenridge, CO
SP Amer Astronaut Soc
HO Rocky Mt Sect
AB As a backup to the GPS-aided Kalman filter and the Barometric altimeter, an "adjusted" velocity trigger is used during entry to trigger the chain of events that leads to drogue chute deploy for the Orion Multi-Purpose Crew Vehicle (MPCV) Exploration Flight Test-1 (EFT-1). Even though this scenario is multiple failures deep, the Orion Guidance, Navigation, and Control (GN&C) software makes use of a clever technique that was taken from the Mars Science Laboratory (MSL) program, which recently successfully landing the Curiosity rover on Mars. MSL used this technique to jettison the heat shield at the proper time during descent. Originally, Orion use the un-adjusted navigated velocity, but the removal of the Star Tracker to save costs for EFT-1, increased attitude errors which increased inertial propagation errors to the point where the un-adjusted velocity caused altitude dispersions at drogue deploy to be too large. Thus, to reduce dispersions, the velocity vector is projected onto a "reference" vector that represents the nominal "truth" vector at the desired point in the trajectory. Because the navigation errors are largely perpendicular to the truth vector, this projection significantly reduces dispersions in the velocity magnitude. This paper will detail the evolution of this trigger method for the Orion project and cover the various methods tested to determine the reference "truth" vector; and at what point in the trajectory it should be computed.
C1 [Gay, Robert S.; Stachowiak, Susan; Smith, Kelly] NASA, Johnson Space Ctr, Houston, TX 77058 USA.
RP Gay, RS (reprint author), NASA, Johnson Space Ctr, Houston, TX 77058 USA.
NR 2
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-601-2
J9 ADV ASTRONAUT SCI
PY 2013
VL 149
BP 1007
EP 1017
PG 11
WC Automation & Control Systems; Engineering, Aerospace
SC Automation & Control Systems; Engineering
GA BE9HH
UT WOS:000377554800066
ER

PT J
AU Goebel, K
   Vachtsevanos, G
   Orchard, ME
AF Goebel, Kai
   Vachtsevanos, George
   Orchard, Marcos E.
BE Jennions, IK
TI Prognostics
SO INTEGRATED VEHICLE HEALTH MANAGEMENT: THE TECHNOLOGY
LA English
DT Article; Book Chapter
C1 [Goebel, Kai] NASA Ames Res Ctr, Prognost Ctr Excellence, Moffett Field, CA 94035 USA.
   [Vachtsevanos, George] Georgia Inst Technol, Sch Elect & Comp Engn, Atlanta, GA 30332 USA.
   [Orchard, Marcos E.] Univ Chile, Dept Elect Engn, Santiago, Chile.
RP Goebel, K (reprint author), NASA Ames Res Ctr, Prognost Ctr Excellence, Moffett Field, CA 94035 USA.
NR 24
TC 0
Z9 0
U1 0
U2 0
PU SAE INTERNATIONAL
PI WARRENDALE
PA 400 COMMONWEALTH DRIVE, WARRENDALE, PA 15096 USA
BN 978-0-7680-7952-4
PY 2013
BP 49
EP 69
D2 10.4271/R-429
PG 21
WC Engineering, Mechanical
SC Engineering
GA BF5MW
UT WOS:000382295700004
ER

PT J
AU Saxena, A
   Roemer, MJ
AF Saxena, Abhinav
   Roemer, Michael J.
BE Jennions, IK
TI IVHM Assessment Metrics
SO INTEGRATED VEHICLE HEALTH MANAGEMENT: THE TECHNOLOGY
LA English
DT Article; Book Chapter
C1 [Saxena, Abhinav] SGT Inc, NASA Ames Res Ctr, Moffett Field, CA 94035 USA.
   [Roemer, Michael J.] Impact Technol, St Louis, MO USA.
RP Saxena, A (reprint author), SGT Inc, NASA Ames Res Ctr, Moffett Field, CA 94035 USA.
NR 26
TC 0
Z9 0
U1 0
U2 0
PU SAE INTERNATIONAL
PI WARRENDALE
PA 400 COMMONWEALTH DRIVE, WARRENDALE, PA 15096 USA
BN 978-0-7680-7952-4
PY 2013
BP 71
EP 88
D2 10.4271/R-429
PG 18
WC Engineering, Mechanical
SC Engineering
GA BF5MW
UT WOS:000382295700005
ER

PT J
AU Srivastava, AN
   Mah, RW
   Bharadwaj, R
   Mylaraswamy, D
AF Srivastava, A. N.
   Mah, R. W.
   Bharadwaj, R.
   Mylaraswamy, D.
BE Jennions, IK
TI Vehicle-Level Reasoning Systems
SO INTEGRATED VEHICLE HEALTH MANAGEMENT: THE TECHNOLOGY
LA English
DT Article; Book Chapter
C1 [Srivastava, A. N.; Mah, R. W.] NASA Ames Res Ctr, Moffett Field, CA 94035 USA.
   [Bharadwaj, R.; Mylaraswamy, D.] Honeywell Aerosp, Phoenix, AZ USA.
RP Srivastava, AN (reprint author), NASA Ames Res Ctr, Moffett Field, CA 94035 USA.
NR 24
TC 0
Z9 0
U1 0
U2 0
PU SAE INTERNATIONAL
PI WARRENDALE
PA 400 COMMONWEALTH DRIVE, WARRENDALE, PA 15096 USA
BN 978-0-7680-7952-4
PY 2013
BP 139
EP 155
D2 10.4271/R-429
PG 17
WC Engineering, Mechanical
SC Engineering
GA BF5MW
UT WOS:000382295700008
ER

PT B
AU Wang, L
   Zhang, PG
   Habibi, MH
   Guo, SM
   Eldridge, JI
AF Wang, Li
   Zhang, Peigen
   Habibi, M. H.
   Guo, S. M.
   Eldridge, Jeffrey I.
GP ASME
TI THERMOCHEMICAL COMPATIBILITY AND OPTICAL PROPERTIES OF GD2ZR2O7 AND YSZ
   FOR THERMAL BARRIER COATINGS
SO INTERNATIONAL MECHANICAL ENGINEERING CONGRESS AND EXPOSITION - 2012, VOL
   3, PTS A-C: DESIGN, MATERIALS, AND MANUFACTURING
LA English
DT Proceedings Paper
CT ASME International Mechanical Engineering Congress and Exposition
CY NOV 09-15, 2012
CL Houston, TX
SP ASME
ID ABSORPTION-COEFFICIENTS; CONDUCTIVITY; STABILITY; SCATTERING; DESIGN
AB In this paper, the phase stability of 50wt% gadolinium zirconate (Gd2Zr2O7, GZ) and 50wt% yttria-stabilized zirconia (YSZ) powder mixture heat treated at 1300 degrees C for different time was investigation by X-ray diffraction (XRD). Results showed that due to the gadolinium and yttria ion diffusion, the lattice parameter of GZ decreased with increase of the heat treatment time, and a part of YSZ had phase transformation which might be one of the reasons for the interface failure in double-layered or functionally gradient TBC systems. In addition, the room-temperature hemispherical reflectance, transmittance and absorptance spectra over the wavelength range from 0.8 to 15 mu m were also determined for free standing GZ, YSZ and 50wt% GZ+50wt% YSZ plasma sprayed coatings. All of the ceramic coatings are semitransparent due to the high transmittance in the wavelength range <6 mu m where turbine engine thermal radiation is concentrated. GZ is transparent to longer wavelengths than 8YSZ and has unique small peaks at wavelength 2.4 mu m. The mixed coating is intermediate in behavior to GZ and YSZ coatings.
C1 [Wang, Li; Zhang, Peigen; Habibi, M. H.; Guo, S. M.] Louisiana State Univ, Dept Mech Engn, Baton Rouge, LA 70803 USA.
   [Eldridge, Jeffrey I.] NASA, Glenn Res Ctr, Cleveland, OH USA.
RP Wang, L (reprint author), Louisiana State Univ, Dept Mech Engn, Baton Rouge, LA 70803 USA.
NR 18
TC 0
Z9 0
U1 0
U2 4
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-4519-6
PY 2013
BP 889
EP 893
PG 5
WC Engineering, Manufacturing; Engineering, Mechanical; Materials Science,
   Multidisciplinary
SC Engineering; Materials Science
GA BC1DQ
UT WOS:000350004500110
ER

PT B
AU Malinowski, J
   Wiley, P
   Trent, J
   Geiger, EJ
AF Malinowski, John
   Wiley, Patrick
   Trent, Jonathan
   Geiger, Emil J.
GP ASME
TI WIRELESS ISFET PH SENSOR NETWORK FOR OFFSHORE MICROALGAE CULTIVATION
SO INTERNATIONAL MECHANICAL ENGINEERING CONGRESS AND EXPOSITION - 2012, VOL
   6, PTS A AND B
LA English
DT Proceedings Paper
CT ASME International Mechanical Engineering Congress and Exposition
CY NOV 09-15, 2012
CL Houston, TX
SP ASME
AB Microalgae technology continues to show tremendous promise for becoming a major source of renewable transportation fuel in the coming decades. Ho Weyer, for microalgae to provide a significant fraction of the current US demand for fuel, their cultivation will be required on an enormous scale. One of the many formidable challenges that must be met to achieve this scale is the development of appropriate sensor networks to provide information about the growth conditions and the algae themselves. These sensors would monitor the heterogeneity of a) environmental parameters, such as pH, oxygen, and nutrient levels and b) algal characteristics such as size, oil content, and viability. Here we present a wireless sensor network to measure the local pH in NASA OMEGA project (Offshore Membrane Enclosures for Growing Algae). The pH is measured using Ion Sensitive Field Effect Transistor (ISFET) technology, which is more robust and has a faster response than traditional glass pH electrodes. A custom circuit drives the ISFET sensor and interfaces with an ANT wireless network system. The wireless network consists of a network hub which can service up to 8 sensor nodes and a series of relays to transmit the data to a PC. The data is logged with a custom Lab VIEW program. In this work, we demonstrate operation of this network using a single ISFET pH sensor, one hub, and two relay units. The performance of the pH sensor network is evaluated and compared in parallel with an existing wired glass electrode based pH monitoring system at the NASA OMEGA project.
C1 [Malinowski, John; Geiger, Emil J.] Univ Nevada, Dept Mech Engn, Reno, NV 89557 USA.
   [Wiley, Patrick] Univ Calif Merced, Dept Environm Engn, Merced, CA 95344 USA.
   [Trent, Jonathan] NASA Ames Res Ctr, Moffett Field, CA 94035 USA.
RP Malinowski, J (reprint author), Univ Nevada, Dept Mech Engn, Reno, NV 89557 USA.
EM ejg@unr.edu
NR 12
TC 0
Z9 0
U1 1
U2 5
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-4522-6
PY 2013
BP 53
EP 57
PG 5
WC Energy & Fuels; Engineering, Mechanical
SC Energy & Fuels; Engineering
GA BC1GD
UT WOS:000350070400007
ER

PT B
AU Lall, P
   Lowe, R
   Goebel, K
AF Lall, Pradeep
   Lowe, Ryan
   Goebel, Kai
GP ASME
TI COST ASSESSMENT FOR IMPLEMENTATION OF EMBEDDED PROGNOSTIC HEALTH
   MANAGEMENT FOR ELECTRONIC SYSTEMS
SO INTERNATIONAL MECHANICAL ENGINEERING CONGRESS AND EXPOSITION - 2012, VOL
   9, PTS A AND B
LA English
DT Proceedings Paper
CT ASME International Mechanical Engineering Congress and Exposition
CY NOV 09-15, 2012
CL Houston, TX
SP ASME
ID PHM; RELIABILITY; MODEL; SHOCK
AB Prognostic health management (PHM) is a method for assuring the reliability of a system by monitoring the system in real time as it is used in the field. As the system wears out, but before failure, information that facilitates decision making about the future use of the system is delivered to the user. In this paper, a cost justification has been developed for incorporating the additional circuitry needed to enable prognostics for electrical components directly onto a functional circuit board. Implementing PHM capability for circuit boards will add additional cost to a system, so high reliability systems where the cost of failure is high are easiest to cost justify for prognostics. Aerospace, defense and automotive, applications qualify as high reliability systems. Application domains that require high uptime, minimal amounts of unplanned maintenance, and controllable operating costs can also be cost justified for prognostics since they can benefit from the pro-active management of failures facilitated by PHM. Intangible criteria such as safety or the cost of human life also motivated the need for PHM, so often times projects are labeled strategic, and not subjected to the discipline of a financial analysis. This paper will show rigorous methods for assessing the decision to invest in PHM for electronics. The uncertain nature of research and development (R&D) and difficult to predict future economic conditions is not well captured by traditional discounted cash flow (DCF) methods. An approach known as the Datar-Mathews (DM) method will extend the DCF methods to be equivalent to a real options analysis and the Black-Scholes formula. The DM method is intuitive and uses concepts familiar to most engineers and technical managers.
C1 [Lall, Pradeep; Lowe, Ryan] Auburn Univ, NSF CAVE3, Elect Res Ctr, Dept Mech Engn, Auburn, AL 36849 USA.
   [Goebel, Kai] NASA, Ames Res Ctr, Huntsville, AL USA.
RP Lall, P (reprint author), Auburn Univ, NSF CAVE3, Elect Res Ctr, Dept Mech Engn, Auburn, AL 36849 USA.
EM lall@auburn.edu
NR 42
TC 0
Z9 0
U1 0
U2 0
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-4525-7
PY 2013
BP 775
EP 785
PG 11
WC Engineering, Mechanical; Nanoscience & Nanotechnology
SC Engineering; Science & Technology - Other Topics
GA BC1ZR
UT WOS:000350613200114
ER

PT B
AU Lall, P
   Narayan, V
   Blanche, J
   Strickland, M
AF Lall, Pradeep
   Narayan, Vikalp
   Blanche, Jim
   Strickland, Mark
GP ASME
TI EFFECT OF MANUFACTURING PROCESS PARAMETERS ON PROPERTY EVOLUTION OF
   PRINTED CIRCUIT BOARD LAMINATES
SO INTERNATIONAL MECHANICAL ENGINEERING CONGRESS AND EXPOSITION - 2012, VOL
   9, PTS A AND B
LA English
DT Proceedings Paper
CT ASME International Mechanical Engineering Congress and Exposition
CY NOV 09-15, 2012
CL Houston, TX
SP ASME
AB The effect of temperature exposure encountered both, during assembly and in fielded products, has a known influence on glass transition temperature of printed-circuit board (PCB) laminate materials. Printed circuit board laminates such as FR4 are composites of epoxy resin with woven fiberglass reinforcement. Interaction between manufacturing process variables that impact the changes in glass transition temperature (T-g) has been studied. The laminates studied have been broadly classified into high-T-g, and mid-T-g laminates. Different sets of reflow profiles were created by varying the process variables including, time above liquidus, peak temperature, ramp rate and cooling rate. The effect of multiple reflows encountered in normal assembly or board re-work has been studied by exposing the assemblies to multiple reflows between 2x-6x. Changes to the glass transition temperature have been classified by measurement of the glass transition temperature were measured via Thermo Mechanical Analysis (TMA). Statistical analysis of the variables has been used to determine the statistical significance of the measured changes for large populations.
C1 [Lall, Pradeep; Narayan, Vikalp] Auburn Univ, Dept Mech Engn, NSF CAVE3 Elect Res Ctr, Auburn, AL 36849 USA.
   [Blanche, Jim; Strickland, Mark] NASA, George C Marshall Space Flight Ctr, Huntsville, AL 35812 USA.
RP Lall, P (reprint author), Auburn Univ, Dept Mech Engn, NSF CAVE3 Elect Res Ctr, Auburn, AL 36849 USA.
EM lall@auburn.edu
NR 8
TC 0
Z9 0
U1 0
U2 1
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-4525-7
PY 2013
BP 1023
EP 1031
PG 9
WC Engineering, Mechanical; Nanoscience & Nanotechnology
SC Engineering; Science & Technology - Other Topics
GA BC1ZR
UT WOS:000350613200144
ER

PT S
AU Brovelli, MA
   Hogan, P
   Minghini, M
   Zamboni, G
AF Brovelli, M. A.
   Hogan, P.
   Minghini, M.
   Zamboni, G.
BE Wu, LX
   Veenendaal, B
TI THE POWER OF VIRTUAL GLOBES FOR VALORISING CULTURAL HERITAGE AND
   ENABLING SUSTAINABLE TOURISM: NASA WORLD WIND APPLICATIONS
SO ISPRS WEBMGS 2013 & DMGIS 2013 TOPICS: GLOBAL SPATIAL GRID & CLOUD-BASED
   SERVICES
SE International Archives of the Photogrammetry Remote Sensing and Spatial
   Information Sciences
LA English
DT Proceedings Paper
CT International-Society-for-Photogrammetry-and-Remote-Sensing 3rd
   International Workshop on Web Mapping and Geoprocessing Services and
   Applications (WebMGS) / 8th International Workshop on Dynamic
   Multidimensional GIS (DMGIS)
CY NOV 11-12, 2013
CL Xuzhou, PEOPLES R CHINA
SP Int Soc Photogrammetry & Remote Sensing
DE Cultural Heritage; GIS; Three-dimensional; Virtual Globe; Web based
AB Inspired by the visionary idea of Digital Earth, as well as from the tremendous improvements in geo-technologies, use of virtual globes has been changing the way people approach to geographic information on the Web. Unlike the traditional 2D-visualization typical of Geographic Information Systems (GIS), virtual globes offer multi-dimensional, fully-realistic content visualization which allows for a much richer user experience. This research investigates the potential for using virtual globes to foster tourism and enhance cultural heritage. The paper first outlines the state of the art for existing virtual globes, pointing out some possible categorizations according to license type, platform-dependence, application type, default layers, functionalities and freedom of customization. Based on this analysis, the NASA World Wind virtual globe is the preferred tool for promoting tourism and cultural heritage. This is because its open source nature allows unlimited customization (in terms of both data and functionalities), and its Java core supports platform-independence. Relevant tourism-oriented World Wind-based applications, dealing with both the Web promotion of historical cartography and the setup of a participatory Web platform exploiting crowd-sourced data, are described. Finally, the paper presents a project focusing on the promotion of the Via Regina area (crossing the border between Italy and Switzerland) through an ad hoc World Wind customization. World Wind can thus be considered an ideal virtual globe for tourism applications, as it can be shaped to increase awareness of cultural history and, in turn, enhance touristic experience.
C1 [Brovelli, M. A.; Minghini, M.; Zamboni, G.] Politecn Milan, DICA, Lab Geomat, I-22100 Como, Italy.
   [Hogan, P.] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
RP Brovelli, MA (reprint author), Politecn Milan, DICA, Lab Geomat, Como Campus,Via Valleggio 11, I-22100 Como, Italy.
EM maria.brovelli@polimi.it; patrick.hogan@nasa.gov;
   marco.minghini@polimi.it; giorgio.zamboni@polimi.it
NR 11
TC 1
Z9 1
U1 5
U2 5
PU COPERNICUS GESELLSCHAFT MBH
PI GOTTINGEN
PA BAHNHOFSALLE 1E, GOTTINGEN, 37081, GERMANY
SN 2194-9034
J9 INT ARCH PHOTOGRAMM
PY 2013
VL 40-4-W2
BP 115
EP 120
DI 10.5194/isprsarchives-XL-4-W2-115-2013
PG 6
WC Geography, Physical; Remote Sensing; Imaging Science & Photographic
   Technology
SC Physical Geography; Remote Sensing; Imaging Science & Photographic
   Technology
GA BD1ZY
UT WOS:000358537700018
ER

PT S
AU Osmanoglu, B
   Wdowinski, S
   Dixon, TH
AF Osmanoglu, B.
   Wdowinski, S.
   Dixon, T. H.
BE Sunar, F
   Altan, O
   Li, S
   Schindler, K
   Jiang, J
TI 3-D SYNTHETIC APERTURE RADAR INTERFEROMETRY PHASE UNWRAPPING USING
   EXTENDED KALMAN FILTERS
SO ISPRS2013-SSG
SE International Archives of the Photogrammetry Remote Sensing and Spatial
   Information Sciences
LA English
DT Proceedings Paper
CT ISPRS Conference on Serving Society with Geoinformatics (SSG)
CY NOV 11-17, 2013
CL Antalya, TURKEY
SP Int Soc Photogrammetry & Remote Sensing
AB Synthetic Aperture Radar Interferometry (InSAR) observations allow researchers to map elevations, analyze surface deformation, and even detect ground water level changes from satellites orbiting the Earth. The InSAR phase measurements are inherently wrapped between 0 and 2 pi. For most physical interpretation methods the phase measurements have to be unwrapped to reveal the full scale of the observations. The unwrapping of multi-dimensional phase data is still a field of active research and here we present an algorithm using an Extended Kalman Filter (EKF).
   The current implementation of our EKF algorithm utilizes a piecewise linear approximation in space and a simple model in the third dimension (e.g. time). The algorithm starts from wrapped, unfiltered interferograms and filters and unwraps the results at the same time solving for a common topography or deformation rate, starting from the highest quality point in the coherent area and proceeding to unwrap highest quality neighbors. The highest quality neighbors are determined according to the Fisher's Distance, which is a phase quality measure similar to the more commonly used phase derivative variance, but also includes the interferogram coherence. In this presentation we demonstrate the effectiveness of our algorithm for the applications of DEM generation and deformation rate analysis using real data.
C1 [Osmanoglu, B.] NASA, USRA, GSFC, Greenbelt, MD 20771 USA.
   [Osmanoglu, B.; Wdowinski, S.] Univ Miami, RSMAS, Miami, FL 33149 USA.
   [Dixon, T. H.] Univ S Florida, Tampa, FL 33620 USA.
RP Osmanoglu, B (reprint author), NASA, USRA, GSFC, 8800 Greenbelt Rd, Greenbelt, MD 20771 USA.
NR 7
TC 0
Z9 0
U1 0
U2 0
PU COPERNICUS GESELLSCHAFT MBH
PI GOTTINGEN
PA BAHNHOFSALLE 1E, GOTTINGEN, 37081, GERMANY
SN 2194-9034
J9 INT ARCH PHOTOGRAMM
PY 2013
VL 40-7-W2
BP 185
EP 187
DI 10.5194/isprsarchives-XL-7-W2-185-2013
PG 3
WC Geography, Physical; Remote Sensing; Imaging Science & Photographic
   Technology
SC Physical Geography; Remote Sensing; Imaging Science & Photographic
   Technology
GA BD1PF
UT WOS:000358223000034
ER

PT S
AU Osmanoglu, B
   Ozkan, C
   Sunar, F
AF Osmanoglu, B.
   Ozkan, C.
   Sunar, F.
BE Sunar, F
   Altan, O
   Li, S
   Schindler, K
   Jiang, J
TI COMPARISON OF SEMI-AUTOMATIC AND AUTOMATIC SLICK DETECTION ALGORITHMS
   FOR JIYEH POWER STATION OIL SPILL, LEBANON
SO ISPRS2013-SSG
SE International Archives of the Photogrammetry Remote Sensing and Spatial
   Information Sciences
LA English
DT Proceedings Paper
CT ISPRS Conference on Serving Society with Geoinformatics (SSG)
CY NOV 11-17, 2013
CL Antalya, TURKEY
SP Int Soc Photogrammetry & Remote Sensing
DE Oil spill; SAR
ID SURFACE-FILMS; SEA-SURFACE; SAR IMAGES
AB After air strikes on July 14 and 15, 2006 the Jiyeh Power Station started leaking oil into the eastern Mediterranean Sea. The power station is located about 30km south of Beirut and the slick covered about 170 km of coastline threatening the neighboring countries Turkey and Cyprus. Due to the ongoing conflict between Israel and Lebanon, cleaning efforts could not start immediately resulting in 12,000 to 15,000 tons of fuel oil leaking into the sea.
   In this paper we compare results from automatic and semi-automatic slick detection algorithms. The automatic detection method combines the probabilities calculated for each pixel from each image to obtain a joint probability, minimizing the adverse effects of atmosphere on oil spill detection. The method can readily utilize X-, C-and L-band data where available. Furthermore wind and wave speed observations can be used for a more accurate analysis. For this study, we utilize Envisat ASAR ScanSAR data. A probability map is generated based on the radar backscatter, effect of wind and dampening value.
   The semi-automatic algorithm is based on supervised classification. As a classifier, Artificial Neural Network Multilayer Perceptron (ANN MLP) classifier is used since it is more flexible and efficient than conventional maximum likelihood classifier for multisource and multi-temporal data. The learning algorithm for ANN MLP is chosen as the Levenberg-Marquardt (LM). Training and test data for supervised classification are composed from the textural information created from SAR images. This approach is semiautomatic because tuning the parameters of classifier and composing training data need a human interaction.
   We point out the similarities and differences between the two methods and their results as well as underlining their advantages and disadvantages. Due to the lack of ground truth data, we compare obtained results to each other, as well as other published oil slick area assessments.
C1 [Osmanoglu, B.] NASA, USRA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
   [Ozkan, C.] Erciyes Univ, Kayseri, Turkey.
   [Sunar, F.] Istanbul Tech Univ, TR-80626 Istanbul, Turkey.
RP Osmanoglu, B (reprint author), NASA, USRA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
EM batuhan.osmanoglu@nasa.gov; cozkan@erciyes.edu.tr; fsunar@itu.edu.tr
NR 20
TC 0
Z9 0
U1 0
U2 0
PU COPERNICUS GESELLSCHAFT MBH
PI GOTTINGEN
PA BAHNHOFSALLE 1E, GOTTINGEN, 37081, GERMANY
SN 2194-9034
J9 INT ARCH PHOTOGRAMM
PY 2013
VL 40-7-W2
BP 189
EP 193
DI 10.5194/isprsarchives-XL-7-W2-189-2013
PG 5
WC Geography, Physical; Remote Sensing; Imaging Science & Photographic
   Technology
SC Physical Geography; Remote Sensing; Imaging Science & Photographic
   Technology
GA BD1PF
UT WOS:000358223000035
ER

PT J
AU Wang, X
   Yong, ZZ
   Li, QW
   Bradford, PD
   Liu, W
   Tucker, DS
   Cai, W
   Wang, H
   Yuan, FG
   Zhu, YT
AF Wang, X.
   Yong, Z. Z.
   Li, Q. W.
   Bradford, P. D.
   Liu, W.
   Tucker, D. S.
   Cai, W.
   Wang, H.
   Yuan, F. G.
   Zhu, Y. T.
TI Ultrastrong, Stiff and Multifunctional Carbon Nanotube Composites
SO MATERIALS RESEARCH LETTERS
LA English
DT Article
DE Carbon Nanotubes; Composite Materials; Tensile Strength;
   Multifunctional; Alignment
AB Carbon nanotubes (CNTs) are an order of magnitude stronger than any other current engineering fiber. However, for the past two decades, it has been a challenge to utilize their reinforcement potential in composites. Here, we report CNT composites with unprecedented multifunctionalities, including record high strength (3.8 GPa), high Young's modulus (293 GPa), electrical conductivity (1230 S . cm(-1)), and thermal conductivity (41 Wm(-1) K-1). These superior properties are derived from the long length, high volume fraction, good alignment and reduced waviness of the CNTs, which were produced by a novel-processing approach that can be easily scaled up for industrial production.
C1 [Wang, X.; Bradford, P. D.; Liu, W.; Zhu, Y. T.] North Carolina State Univ, Dept Mat Sci & Engn, Raleigh, NC 27695 USA.
   [Yong, Z. Z.; Li, Q. W.] Suzhou Inst Nanotech & Nanobion, Suzhou 215125, Peoples R China.
   [Tucker, D. S.] Marshall Space Flight Ctr, Mat & Proc Lab, Huntsville, AL 35812 USA.
   [Cai, W.; Wang, H.] Oak Ridge Natl Lab, High Temp Mat Lab, Oak Ridge, TN 37831 USA.
   [Yuan, F. G.] North Carolina State Univ, Dept Mech & Aerosp Engn, Raleigh, NC 27695 USA.
RP Li, QW (reprint author), Suzhou Inst Nanotech & Nanobion, Suzhou 215125, Peoples R China.
EM qwli2007@sinano.ac; ytzhu@ncsu.edu
RI Zhu, Yuntian/B-3021-2008; 
OI Zhu, Yuntian/0000-0002-5961-7422; Bradford, Philip/0000-0002-4448-5033
FU North Carolina Space Grant; Air Force Office of Scientific Research; U.
   S. Department of Energy, Office of Energy Efficiency and Renewable
   Energy, Vehicle Technologies Program
FX The work was supported by the North Carolina Space Grant and the Air
   Force Office of Scientific Research. The measurement of thermal
   conductivity was performed at the Oak Ridge National Laboratory's High
   Temperature Materials Laboratory, which was sponsored by the U. S.
   Department of Energy, Office of Energy Efficiency and Renewable Energy,
   Vehicle Technologies Program.
NR 33
TC 98
Z9 104
U1 4
U2 4
PU TAYLOR & FRANCIS INC
PI PHILADELPHIA
PA 530 WALNUT STREET, STE 850, PHILADELPHIA, PA 19106 USA
SN 2166-3831
J9 MATER RES LETT
JI Mater. Res. Lett.
PY 2013
VL 1
IS 1
BP 19
EP 25
DI 10.1080/21663831.2012.686586
PG 7
WC Materials Science, Multidisciplinary
SC Materials Science
GA V44RY
UT WOS:000209767300004
ER

PT B
AU Hilbe, JM
   Robinson, AP
AF Hilbe, Joseph M.
   Robinson, Andrew P.
BA Hilbe, JM
   Robinson, AP
BF Hilbe, JM
   Robinson, AP
TI Programming and R
SO METHODS OF STATISTICAL MODEL ESTIMATION
LA English
DT Article; Book Chapter
C1 [Hilbe, Joseph M.] CALTECH, Jet Prop Lab, NASA, Pasadena, CA 91125 USA.
   [Hilbe, Joseph M.] Arizona State Univ, Stat, Tempe, AZ 85287 USA.
   [Robinson, Andrew P.] Univ Melbourne, ACERA, Melbourne, Vic 3010, Australia.
   [Robinson, Andrew P.] Univ Melbourne, Dept Math & Stat, Melbourne, Vic 3010, Australia.
RP Hilbe, JM (reprint author), CALTECH, Jet Prop Lab, NASA, Pasadena, CA 91125 USA.
EM hilbe@asu.edu; apro@unimelb.edu.au
NR 0
TC 0
Z9 0
U1 0
U2 0
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-1-4398-5803-5; 978-1-4398-5802-8
PY 2013
BP 1
EP 37
PG 37
WC Statistics & Probability
SC Mathematics
GA BC6BC
UT WOS:000353717300002
ER

PT B
AU Hilbe, JM
   Robinson, AP
AF Hilbe, Joseph M.
   Robinson, Andrew P.
BA Hilbe, JM
   Robinson, AP
BF Hilbe, JM
   Robinson, AP
TI METHODS OF STATISTICAL MODEL ESTIMATION Preface
SO METHODS OF STATISTICAL MODEL ESTIMATION
LA English
DT Editorial Material; Book Chapter
C1 [Hilbe, Joseph M.] CALTECH, Jet Prop Lab, NASA, Pasadena, CA 91125 USA.
   [Hilbe, Joseph M.] Arizona State Univ, Stat, Tempe, AZ 85287 USA.
   [Robinson, Andrew P.] Univ Melbourne, ACERA, Melbourne, Vic 3010, Australia.
   [Robinson, Andrew P.] Univ Melbourne, Dept Math & Stat, Melbourne, Vic 3010, Australia.
RP Hilbe, JM (reprint author), CALTECH, Jet Prop Lab, NASA, Pasadena, CA 91125 USA.
EM hilbe@asu.edu; apro@unimelb.edu.au
NR 0
TC 0
Z9 0
U1 0
U2 0
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-1-4398-5803-5; 978-1-4398-5802-8
PY 2013
BP IX
EP XII
PG 4
WC Statistics & Probability
SC Mathematics
GA BC6BC
UT WOS:000353717300001
ER

PT B
AU Hilbe, JM
   Robinson, AP
AF Hilbe, Joseph M.
   Robinson, Andrew P.
BA Hilbe, JM
   Robinson, AP
BF Hilbe, JM
   Robinson, AP
TI Statistics and Likelihood-Based Estimation
SO METHODS OF STATISTICAL MODEL ESTIMATION
LA English
DT Article; Book Chapter
C1 [Hilbe, Joseph M.] CALTECH, Jet Prop Lab, NASA, Pasadena, CA 91125 USA.
   [Hilbe, Joseph M.] Arizona State Univ, Stat, Tempe, AZ 85287 USA.
   [Robinson, Andrew P.] Univ Melbourne, ACERA, Melbourne, Vic 3010, Australia.
   [Robinson, Andrew P.] Univ Melbourne, Dept Math & Stat, Melbourne, Vic 3010, Australia.
RP Hilbe, JM (reprint author), CALTECH, Jet Prop Lab, NASA, Pasadena, CA 91125 USA.
EM hilbe@asu.edu; apro@unimelb.edu.au
NR 0
TC 0
Z9 0
U1 0
U2 0
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-1-4398-5803-5; 978-1-4398-5802-8
PY 2013
BP 39
EP 59
PG 21
WC Statistics & Probability
SC Mathematics
GA BC6BC
UT WOS:000353717300003
ER

PT B
AU Hilbe, JM
   Robinson, AP
AF Hilbe, Joseph M.
   Robinson, Andrew P.
BA Hilbe, JM
   Robinson, AP
BF Hilbe, JM
   Robinson, AP
TI Ordinary Regression
SO METHODS OF STATISTICAL MODEL ESTIMATION
LA English
DT Article; Book Chapter
C1 [Hilbe, Joseph M.] CALTECH, Jet Prop Lab, NASA, Pasadena, CA 91125 USA.
   [Hilbe, Joseph M.] Arizona State Univ, Stat, Tempe, AZ 85287 USA.
   [Robinson, Andrew P.] Univ Melbourne, ACERA, Melbourne, Vic 3010, Australia.
   [Robinson, Andrew P.] Univ Melbourne, Dept Math & Stat, Melbourne, Vic 3010, Australia.
RP Hilbe, JM (reprint author), CALTECH, Jet Prop Lab, NASA, Pasadena, CA 91125 USA.
EM hilbe@asu.edu; apro@unimelb.edu.au
NR 0
TC 0
Z9 0
U1 0
U2 0
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-1-4398-5803-5; 978-1-4398-5802-8
PY 2013
BP 61
EP 95
PG 35
WC Statistics & Probability
SC Mathematics
GA BC6BC
UT WOS:000353717300004
ER

PT B
AU Hilbe, JM
   Robinson, AP
AF Hilbe, Joseph M.
   Robinson, Andrew P.
BA Hilbe, JM
   Robinson, AP
BF Hilbe, JM
   Robinson, AP
TI Generalized Linear Models
SO METHODS OF STATISTICAL MODEL ESTIMATION
LA English
DT Article; Book Chapter
C1 [Hilbe, Joseph M.] CALTECH, Jet Prop Lab, NASA, Pasadena, CA 91125 USA.
   [Hilbe, Joseph M.] Arizona State Univ, Stat, Tempe, AZ 85287 USA.
   [Robinson, Andrew P.] Univ Melbourne, ACERA, Melbourne, Vic 3010, Australia.
   [Robinson, Andrew P.] Univ Melbourne, Dept Math & Stat, Melbourne, Vic 3010, Australia.
RP Hilbe, JM (reprint author), CALTECH, Jet Prop Lab, NASA, Pasadena, CA 91125 USA.
EM hilbe@asu.edu; apro@unimelb.edu.au
NR 0
TC 0
Z9 0
U1 0
U2 0
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-1-4398-5803-5; 978-1-4398-5802-8
PY 2013
BP 97
EP 144
PG 48
WC Statistics & Probability
SC Mathematics
GA BC6BC
UT WOS:000353717300005
ER

PT B
AU Hilbe, JM
   Robinson, AP
AF Hilbe, Joseph M.
   Robinson, Andrew P.
BA Hilbe, JM
   Robinson, AP
BF Hilbe, JM
   Robinson, AP
TI Maximum Likelihood Estimation
SO METHODS OF STATISTICAL MODEL ESTIMATION
LA English
DT Article; Book Chapter
C1 [Hilbe, Joseph M.] CALTECH, Jet Prop Lab, NASA, Pasadena, CA 91125 USA.
   [Hilbe, Joseph M.] Arizona State Univ, Stat, Tempe, AZ 85287 USA.
   [Robinson, Andrew P.] Univ Melbourne, ACERA, Melbourne, Vic 3010, Australia.
   [Robinson, Andrew P.] Univ Melbourne, Dept Math & Stat, Melbourne, Vic 3010, Australia.
RP Hilbe, JM (reprint author), CALTECH, Jet Prop Lab, NASA, Pasadena, CA 91125 USA.
EM hilbe@asu.edu; apro@unimelb.edu.au
NR 0
TC 0
Z9 0
U1 0
U2 0
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-1-4398-5803-5; 978-1-4398-5802-8
PY 2013
BP 145
EP 176
PG 32
WC Statistics & Probability
SC Mathematics
GA BC6BC
UT WOS:000353717300006
ER

PT B
AU Hilbe, JM
   Robinson, AP
AF Hilbe, Joseph M.
   Robinson, Andrew P.
BA Hilbe, JM
   Robinson, AP
BF Hilbe, JM
   Robinson, AP
TI Panel Data
SO METHODS OF STATISTICAL MODEL ESTIMATION
LA English
DT Article; Book Chapter
C1 [Hilbe, Joseph M.] CALTECH, Jet Prop Lab, NASA, Pasadena, CA 91125 USA.
   [Hilbe, Joseph M.] Arizona State Univ, Stat, Tempe, AZ 85287 USA.
   [Robinson, Andrew P.] Univ Melbourne, ACERA, Melbourne, Vic 3010, Australia.
   [Robinson, Andrew P.] Univ Melbourne, Dept Math & Stat, Melbourne, Vic 3010, Australia.
RP Hilbe, JM (reprint author), CALTECH, Jet Prop Lab, NASA, Pasadena, CA 91125 USA.
EM hilbe@asu.edu; apro@unimelb.edu.au
NR 0
TC 0
Z9 0
U1 0
U2 0
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-1-4398-5803-5; 978-1-4398-5802-8
PY 2013
BP 177
EP 202
PG 26
WC Statistics & Probability
SC Mathematics
GA BC6BC
UT WOS:000353717300007
ER

PT B
AU Hilbe, JM
   Robinson, AP
AF Hilbe, Joseph M.
   Robinson, Andrew P.
BA Hilbe, JM
   Robinson, AP
BF Hilbe, JM
   Robinson, AP
TI Model Estimation Using Simulation
SO METHODS OF STATISTICAL MODEL ESTIMATION
LA English
DT Article; Book Chapter
C1 [Hilbe, Joseph M.] CALTECH, Jet Prop Lab, NASA, Pasadena, CA 91125 USA.
   [Hilbe, Joseph M.] Arizona State Univ, Stat, Tempe, AZ 85287 USA.
   [Robinson, Andrew P.] Univ Melbourne, ACERA, Melbourne, Vic 3010, Australia.
   [Robinson, Andrew P.] Univ Melbourne, Dept Math & Stat, Melbourne, Vic 3010, Australia.
RP Hilbe, JM (reprint author), CALTECH, Jet Prop Lab, NASA, Pasadena, CA 91125 USA.
EM hilbe@asu.edu; apro@unimelb.edu.au
NR 0
TC 0
Z9 0
U1 0
U2 0
PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-1-4398-5803-5; 978-1-4398-5802-8
PY 2013
BP 203
EP 232
PG 30
WC Statistics & Probability
SC Mathematics
GA BC6BC
UT WOS:000353717300008
ER

PT J
AU Crits-Christoph, A
   Robinson, CK
   Barnum, T
   Fricke, WF
   Davila, AF
   Jedynak, B
   McKay, CP
   DiRuggiero, J
AF Crits-Christoph, Alexander
   Robinson, Courtney K.
   Barnum, Tyler
   Fricke, W. Florian
   Davila, Alfonso F.
   Jedynak, Bruno
   McKay, Christopher P.
   DiRuggiero, Jocelyne
TI Colonization patterns of soil microbial communities in the Atacama
   Desert
SO MICROBIOME
LA English
DT Article
DE Soil microbial communities; Extreme environment; Arid soil; Atacama
   Desert; Desertification; High-throughput 16S rRNA sequencing
AB Background: The Atacama Desert is one of the driest deserts in the world and its soil, with extremely low moisture, organic carbon content, and oxidizing conditions, is considered to be at the dry limit for life.
   Results: Analyses of high throughput DNA sequence data revealed that bacterial communities from six geographic locations in the hyper-arid core and along a North-South moisture gradient were structurally and phylogenetically distinct (ANOVA test for observed operating taxonomic units at 97% similarity (OTU0.03), P < 0.001) and that communities from locations in the hyper-arid zone displayed the lowest levels of diversity. We found bacterial taxa similar to those found in other arid soil communities with an abundance of Rubrobacterales, Actinomycetales, Acidimicrobiales, and a number of families from the Thermoleophilia. The extremely low abundance of Firmicutes indicated that most bacteria in the soil were in the form of vegetative cells. Integrating molecular data with climate and soil geochemistry, we found that air relative humidity (RH) and soil conductivity significantly correlated with microbial communities' diversity metrics (least squares linear regression for observed OTU0.03 and air RH and soil conductivity, P < 0.001; UniFrac PCoA Spearman's correlation for air RH and soil conductivity, P < 0.0001), indicating that water availability and salt content are key factors in shaping the Atacama soil microbiome. Mineralization studies showed communities actively metabolizing in all soil samples, with increased rates in soils from the southern locations.
   Conclusions: Our results suggest that microorganisms in the driest soils of the Atacama Desert are in a state of stasis for most of the time, but can potentially metabolize if presented with liquid water for a sufficient duration. Over geological time, rare rain events and physicochemical factors potentially played a major role in selecting micro-organisms that are most adapted to extreme desiccating conditions.
C1 [Crits-Christoph, Alexander; Robinson, Courtney K.; Barnum, Tyler; DiRuggiero, Jocelyne] Johns Hopkins Univ, Dept Biol, Baltimore, MD 21218 USA.
   [Fricke, W. Florian] Univ Maryland, Sch Med, Inst Genome Sci, Baltimore, MD 21201 USA.
   [Davila, Alfonso F.; McKay, Christopher P.] NASA Ames, Space Sci Div, Mountain View, CA 94035 USA.
   [Jedynak, Bruno] Johns Hopkins Univ, Whiting Sch Engn, Dept Appl Math & Stat, Baltimore, MD 21218 USA.
RP DiRuggiero, J (reprint author), Johns Hopkins Univ, Dept Biol, 3400 N Charles St,Mudd Hall, Baltimore, MD 21218 USA.
EM jdiruggiero@jhu.edu
FU NASA [EXOB08-0033]; National Science foundation [NSF-0918907]; Open
   Access Promotion Fund of the Johns Hopkins University Libraries
FX The authors thank Dominique Seow, Yang Liu, Shabeg Singh, Kim Webb, and
   Alexandra Gresov for technical assistance, and Octavio Artieda for
   constructive comments. This work was funded by grant EXOB08-0033 from
   NASA and grant NSF-0918907 from the National Science foundation to JDR.
   CPM and AFD acknowledge ASTEP support for fieldwork in the Atacama.
   Publication of this article was funded in part by the Open Access
   Promotion Fund of the Johns Hopkins University Libraries.
NR 68
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PU BIOMED CENTRAL LTD
PI LONDON
PA 236 GRAYS INN RD, FLOOR 6, LONDON WC1X 8HL, ENGLAND
SN 2049-2618
J9 MICROBIOME
JI Microbiome
PY 2013
VL 1
AR 28
DI 10.1186/2049-2618-1-28
PG 13
WC Microbiology
SC Microbiology
GA V40VZ
UT WOS:000209507400028
PM 24451153
ER

PT B
AU Johnston, AH
   Scheick, LZ
AF Johnston, Allan H.
   Scheick, Leif Z.
BE Kaul, AB
TI Scaling and Radiation Effects in Silicon Transistors
SO MICROELECTRONICS TO NANOELECTRONICS: MATERIALS, DEVICES &
   MANUFACTURABILITY
LA English
DT Article; Book Chapter
ID CMOS DEVICES; SINGLE; CIRCUITS; MOSFETS; TECHNOLOGIES; LATCHUP; UPSETS;
   OXIDES; IONS; ICS
AB This chapter reviews the effects of space radiation on microelectronic devices, and shows how device scaling has affected their vulnerability to radiation. The most dramatic impact has been on single-particle effects, particularly those caused by galactic cosmic rays. New effects can occur at the microscopic level, including permanent damage from the interaction of a single energetic particle when it strikes the gate of a metal oxide semiconductor (MOS) transistor. Scaling also impacts device complexity, not only because advanced circuits use such large number of transistors but also because of the complex processing steps needed to design individual transistors that can function with such small feature sizes and meet the requirements necessary for competitive performance. Many of the practical problems that need to be addressed in space are related to the complex design methods used to fabricate scaled devices.
C1 [Johnston, Allan H.; Scheick, Leif Z.] CALTECH, Jet Prop Lab, Pasadena, CA 91125 USA.
RP Johnston, AH (reprint author), CALTECH, Jet Prop Lab, Pasadena, CA 91125 USA.
NR 34
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PU CRC PRESS-TAYLOR & FRANCIS GROUP
PI BOCA RATON
PA 6000 BROKEN SOUND PARKWAY NW, STE 300, BOCA RATON, FL 33487-2742 USA
BN 978-1-4665-0955-9; 978-1-4665-0954-2
PY 2013
BP 29
EP 60
PG 32
WC Engineering, Electrical & Electronic; Nanoscience & Nanotechnology
SC Engineering; Science & Technology - Other Topics
GA BC6DP
UT WOS:000353824200004
ER

PT B
AU Barshi, I
   Farris, C
AF Barshi, Immanuel
   Farris, Candace
BA Barshi, I
   Farris, C
BF Barshi, I
   Farris, C
TI Misunderstandings in ATC Communication Language, Cognition, and
   Experimental Methodology Introduction
SO MISUNDERSTANDINGS IN ATC COMMUNICATION: LANGUAGE, COGNITION, AND
   EXPERIMENTAL METHODOLOGY
SE Ashgate Studies in Human Factors for Flight Operations
LA English
DT Editorial Material; Book Chapter
C1 [Barshi, Immanuel] NASA Ames Res Ctr, Human Syst Integrat Div, Moffett Field, CA 94035 USA.
   [Farris, Candace] McGill Univ, Montreal, PQ, Canada.
RP Barshi, I (reprint author), NASA Ames Res Ctr, Human Syst Integrat Div, Moffett Field, CA 94035 USA.
NR 0
TC 0
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PU ASHGATE PUBLISHING LTD
PI ALDERSHOT
PA GOWER HOUSE, CROFT ROAD, ALDERSHOT GU11 3HR, ENGLAND
BN 978-0-7546-9933-0; 978-0-7546-7973-8
J9 ASHGATE STUD HUM
PY 2013
BP 1
EP +
PG 23
WC Communication; Transportation Science & Technology
SC Communication; Transportation
GA BC4RF
UT WOS:000352865500001
ER

PT B
AU Barshi, I
   Farris, C
AF Barshi, Immanuel
   Farris, Candace
BA Barshi, I
   Farris, C
BF Barshi, I
   Farris, C
TI Misunderstandings in ATC Communication Language, Cognition, and
   Experimental Methodology Introduction to Part I
SO MISUNDERSTANDINGS IN ATC COMMUNICATION: LANGUAGE, COGNITION, AND
   EXPERIMENTAL METHODOLOGY
SE Ashgate Studies in Human Factors for Flight Operations
LA English
DT Editorial Material; Book Chapter
C1 [Barshi, Immanuel] NASA Ames Res Ctr, Human Syst Integrat Div, Moffett Field, CA 94035 USA.
   [Farris, Candace] McGill Univ, Montreal, PQ, Canada.
RP Barshi, I (reprint author), NASA Ames Res Ctr, Human Syst Integrat Div, Moffett Field, CA 94035 USA.
NR 0
TC 0
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PU ASHGATE PUBLISHING LTD
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PA GOWER HOUSE, CROFT ROAD, ALDERSHOT GU11 3HR, ENGLAND
BN 978-0-7546-9933-0; 978-0-7546-7973-8
J9 ASHGATE STUD HUM
PY 2013
BP 15
EP 25
PG 11
WC Communication; Transportation Science & Technology
SC Communication; Transportation
GA BC4RF
UT WOS:000352865500002
ER

PT B
AU Barshi, I
   Farris, C
AF Barshi, Immanuel
   Farris, Candace
BA Barshi, I
   Farris, C
BF Barshi, I
   Farris, C
TI Air Traffic Control Radio Communication
SO MISUNDERSTANDINGS IN ATC COMMUNICATION: LANGUAGE, COGNITION, AND
   EXPERIMENTAL METHODOLOGY
SE Ashgate Studies in Human Factors for Flight Operations
LA English
DT Article; Book Chapter
C1 [Barshi, Immanuel] NASA Ames Res Ctr, Human Syst Integrat Div, Moffett Field, CA 94035 USA.
   [Farris, Candace] McGill Univ, Montreal, PQ, Canada.
RP Barshi, I (reprint author), NASA Ames Res Ctr, Human Syst Integrat Div, Moffett Field, CA 94035 USA.
NR 0
TC 1
Z9 1
U1 0
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PU ASHGATE PUBLISHING LTD
PI ALDERSHOT
PA GOWER HOUSE, CROFT ROAD, ALDERSHOT GU11 3HR, ENGLAND
BN 978-0-7546-9933-0; 978-0-7546-7973-8
J9 ASHGATE STUD HUM
PY 2013
BP 27
EP 44
PG 18
WC Communication; Transportation Science & Technology
SC Communication; Transportation
GA BC4RF
UT WOS:000352865500003
ER

PT B
AU Barshi, I
   Farris, C
AF Barshi, Immanuel
   Farris, Candace
BA Barshi, I
   Farris, C
BF Barshi, I
   Farris, C
TI The Omission and Deletion of Linguistic Elements in ATC Clearances
SO MISUNDERSTANDINGS IN ATC COMMUNICATION: LANGUAGE, COGNITION, AND
   EXPERIMENTAL METHODOLOGY
SE Ashgate Studies in Human Factors for Flight Operations
LA English
DT Article; Book Chapter
C1 [Barshi, Immanuel] NASA Ames Res Ctr, Human Syst Integrat Div, Moffett Field, CA 94035 USA.
   [Farris, Candace] McGill Univ, Montreal, PQ, Canada.
RP Barshi, I (reprint author), NASA Ames Res Ctr, Human Syst Integrat Div, Moffett Field, CA 94035 USA.
NR 0
TC 0
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PU ASHGATE PUBLISHING LTD
PI ALDERSHOT
PA GOWER HOUSE, CROFT ROAD, ALDERSHOT GU11 3HR, ENGLAND
BN 978-0-7546-9933-0; 978-0-7546-7973-8
J9 ASHGATE STUD HUM
PY 2013
BP 45
EP 73
PG 29
WC Communication; Transportation Science & Technology
SC Communication; Transportation
GA BC4RF
UT WOS:000352865500004
ER

PT B
AU Barshi, I
   Farris, C
AF Barshi, Immanuel
   Farris, Candace
BA Barshi, I
   Farris, C
BF Barshi, I
   Farris, C
TI Experimental Study of ATC-like Instructions
SO MISUNDERSTANDINGS IN ATC COMMUNICATION: LANGUAGE, COGNITION, AND
   EXPERIMENTAL METHODOLOGY
SE Ashgate Studies in Human Factors for Flight Operations
LA English
DT Article; Book Chapter
C1 [Barshi, Immanuel] NASA Ames Res Ctr, Human Syst Integrat Div, Moffett Field, CA 94035 USA.
   [Farris, Candace] McGill Univ, Montreal, PQ, Canada.
RP Barshi, I (reprint author), NASA Ames Res Ctr, Human Syst Integrat Div, Moffett Field, CA 94035 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU ASHGATE PUBLISHING LTD
PI ALDERSHOT
PA GOWER HOUSE, CROFT ROAD, ALDERSHOT GU11 3HR, ENGLAND
BN 978-0-7546-9933-0; 978-0-7546-7973-8
J9 ASHGATE STUD HUM
PY 2013
BP 75
EP 103
PG 29
WC Communication; Transportation Science & Technology
SC Communication; Transportation
GA BC4RF
UT WOS:000352865500005
ER

PT B
AU Barshi, I
   Farris, C
AF Barshi, Immanuel
   Farris, Candace
BA Barshi, I
   Farris, C
BF Barshi, I
   Farris, C
TI Misunderstandings in ATC Communication Language, Cognition, and
   Experimental Methodology Conclusion to Part I
SO MISUNDERSTANDINGS IN ATC COMMUNICATION: LANGUAGE, COGNITION, AND
   EXPERIMENTAL METHODOLOGY
SE Ashgate Studies in Human Factors for Flight Operations
LA English
DT Editorial Material; Book Chapter
C1 [Barshi, Immanuel] NASA Ames Res Ctr, Human Syst Integrat Div, Moffett Field, CA 94035 USA.
   [Farris, Candace] McGill Univ, Montreal, PQ, Canada.
RP Barshi, I (reprint author), NASA Ames Res Ctr, Human Syst Integrat Div, Moffett Field, CA 94035 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU ASHGATE PUBLISHING LTD
PI ALDERSHOT
PA GOWER HOUSE, CROFT ROAD, ALDERSHOT GU11 3HR, ENGLAND
BN 978-0-7546-9933-0; 978-0-7546-7973-8
J9 ASHGATE STUD HUM
PY 2013
BP 105
EP 108
PG 4
WC Communication; Transportation Science & Technology
SC Communication; Transportation
GA BC4RF
UT WOS:000352865500006
ER

PT B
AU Barshi, I
   Farris, C
AF Barshi, Immanuel
   Farris, Candace
BA Barshi, I
   Farris, C
BF Barshi, I
   Farris, C
TI TRANSITION
SO MISUNDERSTANDINGS IN ATC COMMUNICATION: LANGUAGE, COGNITION, AND
   EXPERIMENTAL METHODOLOGY
SE Ashgate Studies in Human Factors for Flight Operations
LA English
DT Editorial Material; Book Chapter
C1 [Barshi, Immanuel] NASA Ames Res Ctr, Human Syst Integrat Div, Moffett Field, CA 94035 USA.
   [Farris, Candace] McGill Univ, Montreal, PQ, Canada.
RP Barshi, I (reprint author), NASA Ames Res Ctr, Human Syst Integrat Div, Moffett Field, CA 94035 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU ASHGATE PUBLISHING LTD
PI ALDERSHOT
PA GOWER HOUSE, CROFT ROAD, ALDERSHOT GU11 3HR, ENGLAND
BN 978-0-7546-9933-0; 978-0-7546-7973-8
J9 ASHGATE STUD HUM
PY 2013
BP 109
EP 110
PG 2
WC Communication; Transportation Science & Technology
SC Communication; Transportation
GA BC4RF
UT WOS:000352865500007
ER

PT B
AU Barshi, I
   Farris, C
AF Barshi, Immanuel
   Farris, Candace
BA Barshi, I
   Farris, C
BF Barshi, I
   Farris, C
TI Misunderstandings in ATC Communication Language, Cognition, and
   Experimental Methodology Introduction to Part II
SO MISUNDERSTANDINGS IN ATC COMMUNICATION: LANGUAGE, COGNITION, AND
   EXPERIMENTAL METHODOLOGY
SE Ashgate Studies in Human Factors for Flight Operations
LA English
DT Editorial Material; Book Chapter
C1 [Barshi, Immanuel] NASA Ames Res Ctr, Human Syst Integrat Div, Moffett Field, CA 94035 USA.
   [Farris, Candace] McGill Univ, Montreal, PQ, Canada.
RP Barshi, I (reprint author), NASA Ames Res Ctr, Human Syst Integrat Div, Moffett Field, CA 94035 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU ASHGATE PUBLISHING LTD
PI ALDERSHOT
PA GOWER HOUSE, CROFT ROAD, ALDERSHOT GU11 3HR, ENGLAND
BN 978-0-7546-9933-0; 978-0-7546-7973-8
J9 ASHGATE STUD HUM
PY 2013
BP 113
EP 115
PG 3
WC Communication; Transportation Science & Technology
SC Communication; Transportation
GA BC4RF
UT WOS:000352865500008
ER

PT B
AU Barshi, I
   Farris, C
AF Barshi, Immanuel
   Farris, Candace
BA Barshi, I
   Farris, C
BF Barshi, I
   Farris, C
TI Literature Review
SO MISUNDERSTANDINGS IN ATC COMMUNICATION: LANGUAGE, COGNITION, AND
   EXPERIMENTAL METHODOLOGY
SE Ashgate Studies in Human Factors for Flight Operations
LA English
DT Review; Book Chapter
C1 [Barshi, Immanuel] NASA Ames Res Ctr, Human Syst Integrat Div, Moffett Field, CA 94035 USA.
   [Farris, Candace] McGill Univ, Montreal, PQ, Canada.
RP Barshi, I (reprint author), NASA Ames Res Ctr, Human Syst Integrat Div, Moffett Field, CA 94035 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU ASHGATE PUBLISHING LTD
PI ALDERSHOT
PA GOWER HOUSE, CROFT ROAD, ALDERSHOT GU11 3HR, ENGLAND
BN 978-0-7546-9933-0; 978-0-7546-7973-8
J9 ASHGATE STUD HUM
PY 2013
BP 117
EP 129
PG 13
WC Communication; Transportation Science & Technology
SC Communication; Transportation
GA BC4RF
UT WOS:000352865500009
ER

PT B
AU Barshi, I
   Farris, C
AF Barshi, Immanuel
   Farris, Candace
BA Barshi, I
   Farris, C
BF Barshi, I
   Farris, C
TI Methods
SO MISUNDERSTANDINGS IN ATC COMMUNICATION: LANGUAGE, COGNITION, AND
   EXPERIMENTAL METHODOLOGY
SE Ashgate Studies in Human Factors for Flight Operations
LA English
DT Article; Book Chapter
C1 [Barshi, Immanuel] NASA Ames Res Ctr, Human Syst Integrat Div, Moffett Field, CA 94035 USA.
   [Farris, Candace] McGill Univ, Montreal, PQ, Canada.
RP Barshi, I (reprint author), NASA Ames Res Ctr, Human Syst Integrat Div, Moffett Field, CA 94035 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU ASHGATE PUBLISHING LTD
PI ALDERSHOT
PA GOWER HOUSE, CROFT ROAD, ALDERSHOT GU11 3HR, ENGLAND
BN 978-0-7546-9933-0; 978-0-7546-7973-8
J9 ASHGATE STUD HUM
PY 2013
BP 131
EP 144
PG 14
WC Communication; Transportation Science & Technology
SC Communication; Transportation
GA BC4RF
UT WOS:000352865500010
ER

PT B
AU Barshi, I
   Farris, C
AF Barshi, Immanuel
   Farris, Candace
BA Barshi, I
   Farris, C
BF Barshi, I
   Farris, C
TI Results
SO MISUNDERSTANDINGS IN ATC COMMUNICATION: LANGUAGE, COGNITION, AND
   EXPERIMENTAL METHODOLOGY
SE Ashgate Studies in Human Factors for Flight Operations
LA English
DT Article; Book Chapter
C1 [Barshi, Immanuel] NASA Ames Res Ctr, Human Syst Integrat Div, Moffett Field, CA 94035 USA.
   [Farris, Candace] McGill Univ, Montreal, PQ, Canada.
RP Barshi, I (reprint author), NASA Ames Res Ctr, Human Syst Integrat Div, Moffett Field, CA 94035 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU ASHGATE PUBLISHING LTD
PI ALDERSHOT
PA GOWER HOUSE, CROFT ROAD, ALDERSHOT GU11 3HR, ENGLAND
BN 978-0-7546-9933-0; 978-0-7546-7973-8
J9 ASHGATE STUD HUM
PY 2013
BP 145
EP 168
PG 24
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SC Communication; Transportation
GA BC4RF
UT WOS:000352865500011
ER

PT B
AU Barshi, I
   Farris, C
AF Barshi, Immanuel
   Farris, Candace
BA Barshi, I
   Farris, C
BF Barshi, I
   Farris, C
TI Discussion
SO MISUNDERSTANDINGS IN ATC COMMUNICATION: LANGUAGE, COGNITION, AND
   EXPERIMENTAL METHODOLOGY
SE Ashgate Studies in Human Factors for Flight Operations
LA English
DT Article; Book Chapter
C1 [Barshi, Immanuel] NASA Ames Res Ctr, Human Syst Integrat Div, Moffett Field, CA 94035 USA.
   [Farris, Candace] McGill Univ, Montreal, PQ, Canada.
RP Barshi, I (reprint author), NASA Ames Res Ctr, Human Syst Integrat Div, Moffett Field, CA 94035 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU ASHGATE PUBLISHING LTD
PI ALDERSHOT
PA GOWER HOUSE, CROFT ROAD, ALDERSHOT GU11 3HR, ENGLAND
BN 978-0-7546-9933-0; 978-0-7546-7973-8
J9 ASHGATE STUD HUM
PY 2013
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PG 12
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SC Communication; Transportation
GA BC4RF
UT WOS:000352865500012
ER

PT B
AU Barshi, I
   Farris, C
AF Barshi, Immanuel
   Farris, Candace
BA Barshi, I
   Farris, C
BF Barshi, I
   Farris, C
TI Misunderstandings in ATC Communication Language, Cognition, and
   Experimental Methodology Implications and Conclusions for Part II
SO MISUNDERSTANDINGS IN ATC COMMUNICATION: LANGUAGE, COGNITION, AND
   EXPERIMENTAL METHODOLOGY
SE Ashgate Studies in Human Factors for Flight Operations
LA English
DT Editorial Material; Book Chapter
C1 [Barshi, Immanuel] NASA Ames Res Ctr, Human Syst Integrat Div, Moffett Field, CA 94035 USA.
   [Farris, Candace] McGill Univ, Montreal, PQ, Canada.
RP Barshi, I (reprint author), NASA Ames Res Ctr, Human Syst Integrat Div, Moffett Field, CA 94035 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU ASHGATE PUBLISHING LTD
PI ALDERSHOT
PA GOWER HOUSE, CROFT ROAD, ALDERSHOT GU11 3HR, ENGLAND
BN 978-0-7546-9933-0; 978-0-7546-7973-8
J9 ASHGATE STUD HUM
PY 2013
BP 181
EP 184
PG 4
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SC Communication; Transportation
GA BC4RF
UT WOS:000352865500013
ER

PT B
AU Barshi, I
   Farris, C
AF Barshi, Immanuel
   Farris, Candace
BA Barshi, I
   Farris, C
BF Barshi, I
   Farris, C
TI Misunderstandings in ATC Communication Language, Cognition, and
   Experimental Methodology Final Conclusion
SO MISUNDERSTANDINGS IN ATC COMMUNICATION: LANGUAGE, COGNITION, AND
   EXPERIMENTAL METHODOLOGY
SE Ashgate Studies in Human Factors for Flight Operations
LA English
DT Editorial Material; Book Chapter
C1 [Barshi, Immanuel] NASA Ames Res Ctr, Human Syst Integrat Div, Moffett Field, CA 94035 USA.
   [Farris, Candace] McGill Univ, Montreal, PQ, Canada.
RP Barshi, I (reprint author), NASA Ames Res Ctr, Human Syst Integrat Div, Moffett Field, CA 94035 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU ASHGATE PUBLISHING LTD
PI ALDERSHOT
PA GOWER HOUSE, CROFT ROAD, ALDERSHOT GU11 3HR, ENGLAND
BN 978-0-7546-9933-0; 978-0-7546-7973-8
J9 ASHGATE STUD HUM
PY 2013
BP 185
EP 190
PG 6
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SC Communication; Transportation
GA BC4RF
UT WOS:000352865500014
ER

PT B
AU Barshi, I
   Farris, C
AF Barshi, Immanuel
   Farris, Candace
BA Barshi, I
   Farris, C
BF Barshi, I
   Farris, C
TI Barshi Paradigm Studies
SO MISUNDERSTANDINGS IN ATC COMMUNICATION: LANGUAGE, COGNITION, AND
   EXPERIMENTAL METHODOLOGY
SE Ashgate Studies in Human Factors for Flight Operations
LA English
DT Article; Book Chapter
C1 [Barshi, Immanuel] NASA Ames Res Ctr, Human Syst Integrat Div, Moffett Field, CA 94035 USA.
   [Farris, Candace] McGill Univ, Montreal, PQ, Canada.
RP Barshi, I (reprint author), NASA Ames Res Ctr, Human Syst Integrat Div, Moffett Field, CA 94035 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU ASHGATE PUBLISHING LTD
PI ALDERSHOT
PA GOWER HOUSE, CROFT ROAD, ALDERSHOT GU11 3HR, ENGLAND
BN 978-0-7546-9933-0; 978-0-7546-7973-8
J9 ASHGATE STUD HUM
PY 2013
BP 191
EP 208
PG 18
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SC Communication; Transportation
GA BC4RF
UT WOS:000352865500015
ER

PT B
AU Barshi, I
   Farris, C
AF Barshi, Immanuel
   Farris, Candace
BA Barshi, I
   Farris, C
BF Barshi, I
   Farris, C
TI Excerpts from the Airman's Information Manual Concerning ATC Radio
   Communication Procedures
SO MISUNDERSTANDINGS IN ATC COMMUNICATION: LANGUAGE, COGNITION, AND
   EXPERIMENTAL METHODOLOGY
SE Ashgate Studies in Human Factors for Flight Operations
LA English
DT Article; Book Chapter
C1 [Barshi, Immanuel] NASA Ames Res Ctr, Human Syst Integrat Div, Moffett Field, CA 94035 USA.
   [Farris, Candace] McGill Univ, Montreal, PQ, Canada.
RP Barshi, I (reprint author), NASA Ames Res Ctr, Human Syst Integrat Div, Moffett Field, CA 94035 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU ASHGATE PUBLISHING LTD
PI ALDERSHOT
PA GOWER HOUSE, CROFT ROAD, ALDERSHOT GU11 3HR, ENGLAND
BN 978-0-7546-9933-0; 978-0-7546-7973-8
J9 ASHGATE STUD HUM
PY 2013
BP 209
EP 210
PG 2
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SC Communication; Transportation
GA BC4RF
UT WOS:000352865500016
ER

PT B
AU Barshi, I
   Farris, C
AF Barshi, Immanuel
   Farris, Candace
BA Barshi, I
   Farris, C
BF Barshi, I
   Farris, C
TI Transcript Conventions (Adapted from Appendix A of Ward, Novick, and
   Sousa 1990)
SO MISUNDERSTANDINGS IN ATC COMMUNICATION: LANGUAGE, COGNITION, AND
   EXPERIMENTAL METHODOLOGY
SE Ashgate Studies in Human Factors for Flight Operations
LA English
DT Article; Book Chapter
C1 [Barshi, Immanuel] NASA Ames Res Ctr, Human Syst Integrat Div, Moffett Field, CA 94035 USA.
   [Farris, Candace] McGill Univ, Montreal, PQ, Canada.
RP Barshi, I (reprint author), NASA Ames Res Ctr, Human Syst Integrat Div, Moffett Field, CA 94035 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU ASHGATE PUBLISHING LTD
PI ALDERSHOT
PA GOWER HOUSE, CROFT ROAD, ALDERSHOT GU11 3HR, ENGLAND
BN 978-0-7546-9933-0; 978-0-7546-7973-8
J9 ASHGATE STUD HUM
PY 2013
BP 211
EP 211
PG 1
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SC Communication; Transportation
GA BC4RF
UT WOS:000352865500017
ER

PT B
AU Barshi, I
   Farris, C
AF Barshi, Immanuel
   Farris, Candace
BA Barshi, I
   Farris, C
BF Barshi, I
   Farris, C
TI ATC Clearances and Face-to-Face Communication
SO MISUNDERSTANDINGS IN ATC COMMUNICATION: LANGUAGE, COGNITION, AND
   EXPERIMENTAL METHODOLOGY
SE Ashgate Studies in Human Factors for Flight Operations
LA English
DT Article; Book Chapter
C1 [Barshi, Immanuel] NASA Ames Res Ctr, Human Syst Integrat Div, Moffett Field, CA 94035 USA.
   [Farris, Candace] McGill Univ, Montreal, PQ, Canada.
RP Barshi, I (reprint author), NASA Ames Res Ctr, Human Syst Integrat Div, Moffett Field, CA 94035 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU ASHGATE PUBLISHING LTD
PI ALDERSHOT
PA GOWER HOUSE, CROFT ROAD, ALDERSHOT GU11 3HR, ENGLAND
BN 978-0-7546-9933-0; 978-0-7546-7973-8
J9 ASHGATE STUD HUM
PY 2013
BP 213
EP 214
PG 2
WC Communication; Transportation Science & Technology
SC Communication; Transportation
GA BC4RF
UT WOS:000352865500018
ER

PT B
AU Barshi, I
   Farris, C
AF Barshi, Immanuel
   Farris, Candace
BA Barshi, I
   Farris, C
BF Barshi, I
   Farris, C
TI Transcript of 22 Messages Included in the Analyses in Chapter 3
SO MISUNDERSTANDINGS IN ATC COMMUNICATION: LANGUAGE, COGNITION, AND
   EXPERIMENTAL METHODOLOGY
SE Ashgate Studies in Human Factors for Flight Operations
LA English
DT Article; Book Chapter
C1 [Barshi, Immanuel] NASA Ames Res Ctr, Human Syst Integrat Div, Moffett Field, CA 94035 USA.
   [Farris, Candace] McGill Univ, Montreal, PQ, Canada.
RP Barshi, I (reprint author), NASA Ames Res Ctr, Human Syst Integrat Div, Moffett Field, CA 94035 USA.
NR 0
TC 0
Z9 0
U1 0
U2 0
PU ASHGATE PUBLISHING LTD
PI ALDERSHOT
PA GOWER HOUSE, CROFT ROAD, ALDERSHOT GU11 3HR, ENGLAND
BN 978-0-7546-9933-0; 978-0-7546-7973-8
J9 ASHGATE STUD HUM
PY 2013
BP 215
EP 219
PG 5
WC Communication; Transportation Science & Technology
SC Communication; Transportation
GA BC4RF
UT WOS:000352865500019
ER

PT B
AU Leblanc, T
   Trickl, T
   Vogelmann, H
AF Leblanc, Thierry
   Trickl, Thomas
   Vogelmann, Hannes
BE Kampfer, N
TI Lidar
SO MONITORING ATMOSPHERIC WATER VAPOUR: GROUND-BASED REMOTE SENSING AND
   IN-SITU METHODS
SE ISSI Scientific Report Series
LA English
DT Article; Book Chapter
ID DIFFERENTIAL-ABSORPTION LIDAR; ATMOSPHERIC WATER-VAPOR; MOLECULAR
   SPECTROSCOPIC DATABASE; CONVECTIVE BOUNDARY-LAYER; SPECTRAL-LINE
   DATABASE; PUMPED TI-AL2O3 LASER; RAMAN-LIDAR; HUMIDITY MEASUREMENTS;
   FUTURE PERFORMANCE; LOWER STRATOSPHERE
C1 [Leblanc, Thierry] JPL Table Mt Facil, Wrightwood, CA 92397 USA.
   [Trickl, Thomas; Vogelmann, Hannes] Karlsruher Inst Technol, Inst Meteorol & Klimaforsch, Atmosphar Umweltforsch IMK IFU, D-82467 Garmisch Partenkirchen, Germany.
RP Leblanc, T (reprint author), JPL Table Mt Facil, 24490 Table Mt Rd, Wrightwood, CA 92397 USA.
EM leblanc@tmf.jpl.nasa.gov; thomas.trickl@kit.edu
NR 106
TC 0
Z9 0
U1 1
U2 1
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013, UNITED STATES
BN 978-1-4614-3909-7; 978-1-4614-3908-0
J9 ISSI SCI REP SER
PY 2013
VL 10
BP 113
EP 158
DI 10.1007/978-1-4614-3909-7_7
D2 10.1007/978-1-4614-3909-7
PG 46
WC Meteorology & Atmospheric Sciences; Remote Sensing
SC Meteorology & Atmospheric Sciences; Remote Sensing
GA BD5DA
UT WOS:000361326400008
ER

PT B
AU Wollman, A
   Snyder, T
   Pettit, D
   Weislogel, M
AF Wollman, Andrew
   Snyder, Trevor
   Pettit, Don
   Weislogel, Mark
BE Fujii, M
   Lozo, B
TI Spontaneous Capillarity-Driven Droplet Deployment
SO NIP29: 29TH INTERNATIONAL CONFERENCE ON DIGITAL PRINTING TECHNOLOGIES /
   DIGITAL FABRICATION 2013
LA English
DT Proceedings Paper
CT 29th International Conference on Digital Printing Technologies (NIP29) /
   Digital Fabrication 2013
CY SEP 29-OCT 03, 2013
CL Seatt;e, WA
SP hp invent, xerox, 7-SIGMA, RICOH, CABOT, XAAR, EVONIK IND, esprix technol, INGEDE, Image Sci Assoc, TReK, qea
AB Precision deployment of liquid drops is the hallmark of the inkjet printing industry. There are a variety of different driver technologies, with the two most common being either piezo or bubblejet. In this work we present a novel passive driving method that exploits only the fluid properties and conduit geometry. An enormous range of droplet volumes produced is demonstrated. The method is already being used as a tool to enhance the capability of other experiments to study drop dynamics including droplet impacts, adhesions, and rebounds and the method may also be exploited for specific purposes in the design and testing of capillary fluidics applications such as ink jet printing. It may also be directly applicable to sensor systems such as in the precise delivery of microscopic amounts of fluids in Lab-On-Chip applications and for liquid management aboard spacecraft.
C1 [Wollman, Andrew; Weislogel, Mark] Portland State Univ, Portland, OR 97207 USA.
   [Snyder, Trevor] Xerox Corp, Wilsonville, OR USA.
   [Pettit, Don] NASA, JSC, Houston, TX USA.
RP Wollman, A (reprint author), Portland State Univ, Portland, OR 97207 USA.
FU Xerox University Affairs Grant; NASA [NNX09AP66A]; NASA Oregon Space
   Grant Consortium [NNX10AK68H]
FX Andrew Wollman received his BSME from John Brown University and his MSME
   from Portland State University, where he is currently a PhD student.
   Along with Prof. M.M. Weislogel he conducts research aboard the
   International Space Station and in PSU's Dryden Drop Tower to develop
   design tools for fluids management aboard spacecraft. Dr. T. Snyder is a
   Principal Scientist for Xerox in Wilsonville Oregon. He also has
   significant background in microgravity and drop tower related research
   which applies at many levels in the inkjet printing industry. D. Pettit
   is a NASA Astronaut with a variety of unique space flight experiences
   including numerous fluidics experiments aboard the International Space
   Station. This work was funded by a Xerox University Affairs Grant, and
   in part through NASA Cooperative Agreement NNX09AP66A, and the NASA
   Oregon Space Grant Consortium grant NNX10AK68H.
NR 5
TC 0
Z9 0
U1 0
U2 0
PU SOC IMAGING SCIENCE & TECHNOLOGY
PI SPRINGFIELD
PA 7003 KILWORTH LANE, SPRINGFIELD, VA 22151 USA
BN 978-0-89208-306-0
PY 2013
BP 194
EP 197
PG 4
WC Imaging Science & Photographic Technology
SC Imaging Science & Photographic Technology
GA BG9WA
UT WOS:000393928800050
ER

PT B
AU Porter, FS
AF Porter, F. Scott
BE Huber, MCE
   Pauluhn, A
   Culhane, JL
   Timothy, JG
   Wilhelm, K
   Zehnder, A
TI X-ray calorimeters
SO OBSERVING PHOTONS IN SPACE: A GUIDE TO EXPERIMENTAL SPACE ASTRONOMY, 2ND
   EDITION
SE ISSI Scientific Report Series
LA English
DT Article; Book Chapter
ID HIGH-SPECTRAL-RESOLUTION; MICROCALORIMETER ARRAY; XRS MICROCALORIMETER;
   THERMAL DETECTORS; SOUNDING ROCKET; SPECTROMETER; SYSTEM
AB X-ray calorimeter instruments for astrophysics have seen rapid development since they were invented in 1984. The prime instrument on all currently planned X-ray spectroscopic observatories is based on calorimeter technology. This relatively simple detection concept that senses the energy of an incident photon by measuring the temperature rise of an absorber material at very low temperatures can form the basis of a very high-performance, non-dispersive spectrometer. State-of-theart calorimeter instruments have resolving powers of over 3000, large simultaneous bandpasses, and near unit efficiency. Coupled with the intrinsic imaging capability of a pixelated X-ray calorimeter array, this allows true spectral-spatial instruments to be constructed. This chapter briefly reviews the detection scheme, the state of the art in X-ray calorimeter instruments and the future outlook for this technology.
C1 NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
RP Porter, FS (reprint author), NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
NR 32
TC 1
Z9 1
U1 0
U2 0
PU SPRINGER
PI NEW YORK
PA 233 SPRING STREET, NEW YORK, NY 10013, UNITED STATES
BN 978-1-4614-7804-1; 978-1-4614-7803-4
J9 ISSI SCI REP SER
PY 2013
VL 9
BP 497
EP 514
DI 10.1007/978-1-4614-7804-1_28
D2 10.1007/978-1-4614-7804-1
PG 18
WC Astronomy & Astrophysics; Remote Sensing
SC Astronomy & Astrophysics; Remote Sensing
GA BD5DC
UT WOS:000361327100030
ER

PT J
AU Schiff, C
AF Schiff, Conrad
TI Providing essential physics skills
SO PHYSICS TEACHER
LA English
DT Letter
C1 NASA, Goddard Space Flight Ctr, Magnetospher Multiscale Miss, Washington, DC USA.
RP Schiff, C (reprint author), NASA, Goddard Space Flight Ctr, Magnetospher Multiscale Miss, Washington, DC USA.
NR 1
TC 0
Z9 0
U1 0
U2 0
PU AMER ASSN PHYSICS TEACHERS
PI COLLEGE PK
PA 5110 ROANOKE PLACE SUITE 101, COLLEGE PK, MD 20740 USA
SN 0031-921X
J9 PHYS TEACH
JI Phys. Teach.
PD JAN
PY 2013
VL 51
IS 1
BP 6
EP 6
DI 10.1119/1.4772024
PG 1
WC Physics, Multidisciplinary
SC Physics
GA V41EY
UT WOS:000209530700003
ER

PT S
AU Hussey, DS
   Spernjak, D
   Wu, G
   Jacobson, DL
   Liu, D
   Khaykovich, B
   Gubarev, MV
   Fairweather, J
   Mukundan, R
   Lujan, R
   Zelenay, P
   Borup, RL
AF Hussey, D. S.
   Spernjak, D.
   Wu, G.
   Jacobson, D. L.
   Liu, D.
   Khaykovich, B.
   Gubarev, M. V.
   Fairweather, J.
   Mukundan, R.
   Lujan, R.
   Zelenay, P.
   Borup, R. L.
BE Gasteiger, HA
   Weber, A
   Shinohara, K
   Uchida, H
   Mitsushima, S
   Schmidt, TJ
   Narayanan, SR
   Ramani, V
   Fuller, T
   Edmundson, M
   Strasser, P
   Mantz, R
   Fenton, J
   Buchi, FN
   Hansen, DC
   Jones, DL
   Coutanceau, C
   SwiderLyons, K
   Perry, KA
TI Neutron Imaging Of Water Transport In Polymer-Electrolyte Membranes And
   Membrane-Electrode Assemblies
SO POLYMER ELECTROLYTE FUEL CELLS 13 (PEFC 13)
SE ECS Transactions
LA English
DT Proceedings Paper
CT 13th Polymer Electrolyte Fuel Cell Symposium (PEFC)
CY OCT 27-NOV 01, 2013
CL San Francisco, CA
SP Electrochem Soc, Electrochem Soc, Ind Electrochemistry & Electrochem Engn Div, Electrochem Soc, Battery Div, Electrochem Soc, Corros Div, Electrochem Soc, Energy Technol Div, Electrochem Soc, Phys & Analyt Electrochemistry Div, N E Chemcat Corp
AB Neutron imaging was been widely used to study the water distribution in proton exchange membrane fuel cell flow fields and gas diffusion layer. However, due to the limitation of spatial resolution, there has been little focus on the water transport process in the membrane and catalyst layer. Here we report on measurements made on thick membranes under saturation gradients which show no "jump condition" and on thick cathode catalyst layers to understand the water transport issues in a non-precious metal catalyst. Finally, we speculate on the possibility of obtaining neutron images with similar to 1 mu m spatial resolution.
C1 [Hussey, D. S.; Jacobson, D. L.] Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA.
   [Spernjak, D.; Wu, G.; Fairweather, J.; Mukundan, R.; Lujan, R.; Zelenay, P.; Borup, R. L.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
   [Liu, D.; Khaykovich, B.] MIT, Cambridge, MA 02139 USA.
   [Gubarev, M. V.] NASA, Marshall Space Flight Ctr, Huntsville, AL 35812 USA.
RP Hussey, DS (reprint author), Natl Inst Stand & Technol, Gaithersburg, MD 20899 USA.
RI Wu, Gang/E-8536-2010; Khaykovich, Boris/A-7376-2012; 
OI Wu, Gang/0000-0003-4956-5208; Khaykovich, Boris/0000-0002-9490-2771;
   Mukundan, Rangachary/0000-0002-5679-3930
NR 12
TC 4
Z9 4
U1 1
U2 4
PU ELECTROCHEMICAL SOC INC
PI PENNINGTON
PA 65 S MAIN ST, PENNINGTON, NJ 08534-2839 USA
SN 1938-5862
BN 978-1-60768-446-6; 978-1-60768-445-9
J9 ECS TRANSACTIONS
PY 2013
VL 58
IS 1
BP 293
EP 299
DI 10.1149/05801.0293ecst
PG 7
WC Electrochemistry; Energy & Fuels
SC Electrochemistry; Energy & Fuels
GA BC6TH
UT WOS:000354475600027
ER

PT J
AU Breed, M
   Venter, C
   Harding, AK
   Johnson, TJ
AF Breed, M.
   Venter, C.
   Harding, A. K.
   Johnson, T. J.
BE Botha, R
   Jili, T
TI Implementation of an offset-dipole magnetic field in a pulsar modelling
   code
SO PROCEEDINGS OF SAIP2013: THE 58TH ANNUAL CONFERENCE OF THE SOUTH AFRICAN
   INSTITUTE OF PHYSICS
LA English
DT Proceedings Paper
CT 58th Annual Conference of the South-African-Institute-of-Physics (SAIP)
CY JUL 08-12, 2013
CL Univ Zululand, Richards Bay Campus, Richards Bay, SOUTH AFRICA
SP South African Inst Phys
HO Univ Zululand, Richards Bay Campus
ID LARGE-AREA TELESCOPE; GAMMA-RAY PULSARS; OUTER MAGNETOSPHERE; SLOT GAPS;
   RADIATION; ACCELERATION; CASCADES; EMISSION; CATALOG
AB The light curves of gamma-ray pulsars detected by the Fermi Large Area Telescope show great variety in profile shape and position relative to their radio profiles. Such diversity hints at distinct underlying magnetospheric and/or emission geometries for the individual pulsars. We implemented an offset-dipole magnetic field in an existing geometric pulsar modelling code which already includes static and retarded vacuum dipole fields. In our model, this offset is characterised by a parameter epsilon (with epsilon = 0 corresponding to the static dipole case). We constructed sky maps and light curves for several pulsar parameters and magnetic fields, studying the effect of an offset dipole on the resulting light curves. A standard two-pole caustic emission geometry was used. As an application, we compared our model light curves with Fermi data for the bright Vela pulsar.
C1 [Breed, M.; Venter, C.] North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa.
   [Harding, A. K.] NASA, Goddard Space Flight Ctr, Astrophys Sci Div, Greenbelt, MD 20771 USA.
   [Johnson, T. J.] Natl Acad Sci, Natl Res Council Res Associate, Washington, DC 20001 USA.
   [Johnson, T. J.] Naval Res Lab, Washington, DC 20375 USA.
RP Breed, M (reprint author), North West Univ, Ctr Space Res, Potchefstroom Campus,Private Bag X6001, ZA-2520 Potchefstroom, South Africa.
EM 20574266@nwu.ac.za
NR 20
TC 0
Z9 0
U1 0
U2 0
PU SOUTH AFRICAN INST PHYSICS
PI LYNNWOOD RIDGE
PA POSTNET STE 165, PRIVATE BAG X025, LYNNWOOD RIDGE, 0040, SOUTH AFRICA
BN 978-0-620-62819-8
PY 2013
BP 350
EP 355
PG 6
WC Physics, Applied; Physics, Multidisciplinary
SC Physics
GA BE1GI
UT WOS:000367879900059
ER

PT J
AU Seyffert, AS
   Venter, C
   Harding, AK
   Johnson, TJ
AF Seyffert, A. S.
   Venter, C.
   Harding, A. K.
   Johnson, T. J.
BE Botha, R
   Jili, T
TI Modelling the gamma-ray and radio light curves of the double pulsar
   system
SO PROCEEDINGS OF SAIP2013: THE 58TH ANNUAL CONFERENCE OF THE SOUTH AFRICAN
   INSTITUTE OF PHYSICS
LA English
DT Proceedings Paper
CT 58th Annual Conference of the South-African-Institute-of-Physics (SAIP)
CY JUL 08-12, 2013
CL Univ Zululand, Richards Bay Campus, Richards Bay, SOUTH AFRICA
SP South African Inst Phys
HO Univ Zululand, Richards Bay Campus
AB Guillemot et al. recently reported the discovery of gamma-ray pulsations from the 22.7 ms pulsar (pulsar A) in the famous double pulsar system J0737-3039A/B. The gamma-ray light curve of pulsar A exhibits two peaks separated by approximately half a rotation, and these are noncoincident with the observed radio and X-ray peaks. This suggests that the gamma-ray emission originates in a part of the magnetosphere distinct from where the radio and X-ray radiation is generated. Thus far, three different methods have been applied to constrain the viewing geometry of pulsar A (the inclination angle between its magnetic and rotation axes, and the observer angle): geometric modelling of the radio and gamma-ray light curves, modelling of the position angle sweep in phase seen in the radio polarisation data, and independent studies of the time evolution of the radio pulse profile of pulsar A. These three independent, complementary methods have yielded consistent results: pulsar A's rotation axis is likely perpendicular to the orbital plane of the binary system, and its magnetic axis close to lying in the orbital plane (making this pulsar an orthogonal rotator). The observer is furthermore observing emission close to the magnetic axis. Thus far, however, current models could not reproduce all the characteristics of the radio and gamma-ray light curves, specifically the large radio-to-gamma phase lag. In this paper we discuss some preliminary modelling attempts to address this problem, and offer ideas on how the light curve fits may be improved by adapting the standard geometric models in order to reproduce the profile peak positions more accurately.
C1 [Seyffert, A. S.; Venter, C.] North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa.
   [Harding, A. K.] NASA, Astrophys Sci Div, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
   [Johnson, T. J.] Natl Acad Sci, Natl Res Council Res Associate, Washington, DC 20001 USA.
   [Johnson, T. J.] Naval Res Lab, High Energy Space Environm Branch, Washington, DC 20375 USA.
RP Seyffert, AS (reprint author), North West Univ, Ctr Space Res, Potchefstroom Campus,Private Bag X6001, ZA-2520 Potchefstroom, South Africa.
EM 20126999@nwu.ac.za
NR 4
TC 0
Z9 0
U1 0
U2 0
PU SOUTH AFRICAN INST PHYSICS
PI LYNNWOOD RIDGE
PA POSTNET STE 165, PRIVATE BAG X025, LYNNWOOD RIDGE, 0040, SOUTH AFRICA
BN 978-0-620-62819-8
PY 2013
BP 380
EP 384
PG 5
WC Physics, Applied; Physics, Multidisciplinary
SC Physics
GA BE1GI
UT WOS:000367879900064
ER

PT J
AU Venter, C
   Johnson, TJ
   Harding, AK
   Grove, JE
AF Venter, C.
   Johnson, T. J.
   Harding, A. K.
   Grove, J. E.
BE Botha, R
   Jili, T
TI Modelling the light curves of Fermi LAT millisecond pulsars
SO PROCEEDINGS OF SAIP2013: THE 58TH ANNUAL CONFERENCE OF THE SOUTH AFRICAN
   INSTITUTE OF PHYSICS
LA English
DT Proceedings Paper
CT 58th Annual Conference of the South-African-Institute-of-Physics (SAIP)
CY JUL 08-12, 2013
CL Univ Zululand, Richards Bay Campus, Richards Bay, SOUTH AFRICA
SP South African Inst Phys
HO Univ Zululand, Richards Bay Campus
ID GAMMA-RAY PULSARS; LARGE-AREA TELESCOPE; POLAR CAPS; RADIO; EMISSION;
   CONSTRAINTS
AB We modelled the radio and gamma-ray light curves of millisecond pulsars using outer gap, two-pole caustic, low-altitude slot gap, and pair-starved polar cap geometric models, combined with a semi-empirical conal radio model. We find that no model fits all cases, with the outer gap and two-pole caustic models providing best fits for comparable numbers of millisecond pulsar light curves. We find a broad distribution of best-fit inclination angles as well as a clustering at large observer angles. The outer gap model furthermore seems to require relatively larger inclination angles, while the two-pole caustic model hints at an inverse trend between inclination angle and pulsar spin-down luminosity.
C1 [Venter, C.] North West Univ, Ctr Space Res, ZA-2520 Potchefstroom, South Africa.
   [Johnson, T. J.; Grove, J. E.] Naval Res Lab, High Energy Space Environm Branch, Washington, DC 20375 USA.
   [Johnson, T. J.] Natl Acad Sci, Natl Res Council Res Associate, Washington, DC 20001 USA.
   [Harding, A. K.] NASA, Astrophys Sci Div, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
RP Venter, C (reprint author), North West Univ, Ctr Space Res, Potchefstroom Campus,Private Bag X6001, ZA-2520 Potchefstroom, South Africa.
NR 26
TC 1
Z9 1
U1 0
U2 0
PU SOUTH AFRICAN INST PHYSICS
PI LYNNWOOD RIDGE
PA POSTNET STE 165, PRIVATE BAG X025, LYNNWOOD RIDGE, 0040, SOUTH AFRICA
BN 978-0-620-62819-8
PY 2013
BP 385
EP 390
PG 6
WC Physics, Applied; Physics, Multidisciplinary
SC Physics
GA BE1GI
UT WOS:000367879900065
ER

PT J
AU Zhang, W
   Langley, RB
   Komjathy, A
   Banville, S
AF Zhang, Wei
   Langley, Richard B.
   Komjathy, Attila
   Banville, Simon
GP Inst Navigat
TI Eliminating Potential Errors Caused by the Thin Shell Assumption: An
   Extended 3D UNB Ionospheric Modelling Technique
SO PROCEEDINGS OF THE 26TH INTERNATIONAL TECHNICAL MEETING OF THE SATELLITE
   DIVISION OF THE INSTITUTE OF NAVIGATION (ION GNSS 2013)
LA English
DT Proceedings Paper
CT 26th International Technical Meeting of The
   Satellite-Division-of-the-Institute-of-Navigation (ION GNSS)
CY SEP 16-20, 2013
CL Nashville, TN
SP Inst Navigat, Satellite Div
ID INSTRUMENTAL BIASES; GPS DATA; TOMOGRAPHY; TIME
AB Ionospheric modelling has become an focus area within the global navigation satellite system (GNSS) community using several satellite-based augmentation systems (SBAS) (e.g., Wide Area Augmentation System (WAAS), European Geostationary Navigation Overlay Service (EGNOS), and MTSAT Satellite-based Augmentation System (MSAS)). Data-driven models have been applied with these systems and demonstrated as the best candidates for post-processing and other real-time applications due to their real-time applicability and relatively higher accuracy compared to empirical ionospheric modelling techniques.
   In this paper, our objective is to improve the accuracy for the real-time positioning applications. To achieve this, we extended the University of New Brunswick-Ionospheric Modelling Technique (UNB-IMT) from two-dimensions (2D) to three-dimensions (3D) by modelling the vertical dimension of the ionosphere using empirical orthogonal functions (EOFs) to eliminate the potential mapping function errors. The benefits of the new proposed modelling technique are demonstrated in a small regional network using post-fit residuals, estimated vertical total electron content (vTEC), as well as the repeatability of the estimates of differential code biases (DCBs). The ionospheric results from 3D UNB-IMT are also compared with those from widely-used 3D spherical harmonic (SH) models to show the beneficial effect of improving sensitivity owing to the effective and meaningful parameters in the model.
C1 [Zhang, Wei; Langley, Richard B.; Komjathy, Attila; Banville, Simon] Univ New Brunswick, Dept Geodesy & Geomat Engn, Geodet Res Lab, Fredericton, NB, Canada.
   [Komjathy, Attila] CALTECH, Jet Prop Lab, Pasadena, CA USA.
   [Banville, Simon] Nat Resources Canada, Geodet Survey Div, Ottawa, ON, Canada.
RP Zhang, W (reprint author), Univ New Brunswick, Dept Geodesy & Geomat Engn, Geodet Res Lab, Fredericton, NB, Canada.
NR 34
TC 0
Z9 0
U1 0
U2 0
PU INST NAVIGATION
PI WASHINGTON
PA 815 15TH ST NW, STE 832, WASHINGTON, DC 20005 USA
PY 2013
BP 2447
EP 2462
PG 16
WC Computer Science, Interdisciplinary Applications; Engineering,
   Multidisciplinary
SC Computer Science; Engineering
GA BE7FX
UT WOS:000375213002040
ER

PT J
AU Force, DA
AF Force, Dale A.
GP Inst Navigat
TI Navigation Performance of Global Navigation Satellite Systems in the
   Space Service Volume
SO PROCEEDINGS OF THE 26TH INTERNATIONAL TECHNICAL MEETING OF THE SATELLITE
   DIVISION OF THE INSTITUTE OF NAVIGATION (ION GNSS 2013)
LA English
DT Proceedings Paper
CT 26th International Technical Meeting of The
   Satellite-Division-of-the-Institute-of-Navigation (ION GNSS)
CY SEP 16-20, 2013
CL Nashville, TN
SP Inst Navigat, Satellite Div
AB This paper extends the results I reported at this year's ION International Technical Meeting [1] on multi-constellation GNSS coverage by showing how the use of multi-constellation GNSS improves Geometric Dilution of Precision (GDOP).
   Originally developed to provide position, navigation, and timing for terrestrial users, GPS has found increasing use for in space for precision orbit determination, precise time synchronization, real-time spacecraft navigation, and three-axis attitude control of Earth orbiting satellites. With additional Global Navigation Satellite Systems (GNSS) coming into service (GLONASS, Galileo, and Beidou) and the development of Satellite Based Augmentation Services, it is possible to obtain improved precision by using evolving multi-constellation receiver.
   The Space Service Volume (originally defined in [2]) is formally defined as the volume of space between three thousand kilometers altitude and geosynchronous altitude (similar to 36,500 km), with the volume below three thousand kilometers defined as the Terrestrial Service Volume (TSV).
   The USA has established signal requirements for the Space Service Volume (SSV) as part of the GPS Capability Development Documentation (CDD). Diplomatic efforts are underway to extend Space service Volume commitments to the other Position, Navigation, and Timing (PNT) service providers in an effort to assure that all space users will benefit from the enhanced capabilities of interoperating GNSS services in the space domain.
C1 [Force, Dale A.] NASA, Glenn Res Ctr, Washington, DC 20546 USA.
RP Force, DA (reprint author), NASA, Glenn Res Ctr, Washington, DC 20546 USA.
NR 8
TC 0
Z9 0
U1 0
U2 0
PU INST NAVIGATION
PI WASHINGTON
PA 815 15TH ST NW, STE 832, WASHINGTON, DC 20005 USA
PY 2013
BP 3325
EP 3328
PG 4
WC Computer Science, Interdisciplinary Applications; Engineering,
   Multidisciplinary
SC Computer Science; Engineering
GA BE7FX
UT WOS:000375213003026
ER

PT J
AU Yang, YM
   Komjathy, A
   Butala, M
   Mannucci, AJ
   Langley, RB
   Snively, J
   Hickey, M
   Galvan, D
   Lee, J
AF Yang, Y-M
   Komjathy, A.
   Butala, M.
   Mannucci, A. J.
   Langley, R. B.
   Snively, J.
   Hickey, M.
   Galvan, D.
   Lee, J.
GP Inst Navigat
TI Investigating Natural Hazards Using GNSS Measurements: The Chelyabinsk
   Meteor Ionospheric Impact
SO PROCEEDINGS OF THE 26TH INTERNATIONAL TECHNICAL MEETING OF THE SATELLITE
   DIVISION OF THE INSTITUTE OF NAVIGATION (ION GNSS 2013)
LA English
DT Proceedings Paper
CT 26th International Technical Meeting of The
   Satellite-Division-of-the-Institute-of-Navigation (ION GNSS)
CY SEP 16-20, 2013
CL Nashville, TN
SP Inst Navigat, Satellite Div
ID TSUNAMIS
AB Ionospheric perturbations induced by acoustic-gravity waves generated in the neutral atmosphere are observed in trans-ionospheric global navigation satellite system (GNSS) datasets. Events on the Earth's surface or in the atmosphere, such as earthquakes, tsunamis, meteor ablations, space shuttle launches, and large explosions are potential sources of ionospheric disturbances. In this research, we applied two different approaches to detect ionospheric disturbances in dual frequency GNSS measurements during the Chelyabinsk meteor impact event on February 15, 2013. The data were collected from near-field GNSS networks, GEONET (Japan), and Plate Boundary Observatory (PBO) stations in Alaska and the coterminous U.S. Using a novel wavelet coherence detection technique, we were able to identify three different wave trains in the measurements collected from the nearest GPS station to the meteor impact site, with frequencies of approximately 0.004-0.0078 Hz, 0.001-0.0027 Hz and 0.00098-0.0025 Hz at 03: 30 UTC. We estimated the speed and direction of arrival of the total electron content (TEC) disturbances by cross-correlating every pair of stations in several sub-areas of the GEONET and PBO networks. These may be characterized as three different kinds of traveling ionospheric disturbances (TIDs). First, the higher frequency (0.004-0.0078 Hz) disturbances were observed at the station ARTU (56.43 degrees N, 58.56 degrees E), with propagation speed of about 1180 m/s. Another type of TID disturbance related to the wave trains was identified in the lower frequency band (0.00098-0.0025 Hz), propagating with a speed of 996 m/s. The lower frequency ionospheric perturbations were observed approximately 1500 km away from Chelyabinsk. The third type TID wave train was identified using the GEONET and Alaska stations in the frequency band 0.001-0.0027 Hz having propagation speeds of 336-450 m/s.
C1 [Yang, Y-M; Komjathy, A.; Butala, M.; Mannucci, A. J.] CALTECH, NASA, Jet Prop Lab, Pasadena, CA 91125 USA.
   [Langley, R. B.] Univ New Brunswick, Dept Geodesy & Geomat Engn, Fredericton, NB E3B 5A3, Canada.
   [Snively, J.; Hickey, M.] Embry Riddle Aeronaut Univ, Dept Phys Sci, Seoul, South Korea.
   [Galvan, D.] RAND Corp, Nonprofit, Santa Monica, CA 90406 USA.
   [Lee, J.] Korea Adv Inst Sci & Technol, Sch Mech Aerosp & Syst Engn, Seoul, South Korea.
RP Yang, YM (reprint author), CALTECH, NASA, Jet Prop Lab, Pasadena, CA 91125 USA.
NR 16
TC 0
Z9 0
U1 1
U2 1
PU INST NAVIGATION
PI WASHINGTON
PA 815 15TH ST NW, STE 832, WASHINGTON, DC 20005 USA
PY 2013
BP 3480
EP 3488
PG 9
WC Computer Science, Interdisciplinary Applications; Engineering,
   Multidisciplinary
SC Computer Science; Engineering
GA BE7FX
UT WOS:000375213003044
ER

PT J
AU Burt, E
   Tucker, B
   Larsen, K
   Hamell, R
   Tjoelker, R
AF Burt, Eric
   Tucker, Blake
   Larsen, Kameron
   Hamell, Robert
   Tjoelker, Robert
GP Inst Navigat
TI Next generation JPL ultra-stable trapped ion atomic clocks
SO PROCEEDINGS OF THE 45TH ANNUAL PRECISE TIME AND TIME INTERVAL SYSTEMS
   AND APPLICATIONS MEETING
LA English
DT Proceedings Paper
CT 45th Annual Precise Time and Time Interval Systems and Applications
   Meeting (PTTI)
CY DEC 02-05, 2013
CL Bellevue, WA
AB Over the past decade, trapped ion atomic clock development at the Jet Propulsion Laboratory (JPL) has focused on two directions: 1) new atomic clock technology for space flight applications that require strict adherence to size, weight, and power requirements, and 2) ultra-stable atomic clocks, usually for terrestrial applications emphasizing ultimate performance. In this paper we present a new ultra-stable trapped ion clock designed, built, and tested in the second category. The first new standard, L10, will be delivered to the Naval Research Laboratory for use in characterizing DoD atomic clocks.
C1 [Burt, Eric; Tucker, Blake; Larsen, Kameron; Hamell, Robert; Tjoelker, Robert] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
RP Burt, E (reprint author), CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
NR 13
TC 2
Z9 2
U1 0
U2 1
PU INST NAVIGATION
PI WASHINGTON
PA 815 15TH ST NW, STE 832, WASHINGTON, DC 20005 USA
PY 2013
BP 55
EP 61
PG 7
WC Engineering, Marine; Telecommunications
SC Engineering; Telecommunications
GA BC0TH
UT WOS:000349532400007
ER

PT J
AU Yi, L
   Burt, EA
   Huang, SH
   Tjoelker, RL
AF Yi, Lin
   Burt, Eric A.
   Huang, Shouhua
   Tjoelker, Robert L.
GP Inst Navigat
TI Sub-mm Scale Fiber Guided Deep/Vacuum Ultra-Violet Optical Source for
   Trapped Mercury Ion Clocks
SO PROCEEDINGS OF THE 45TH ANNUAL PRECISE TIME AND TIME INTERVAL SYSTEMS
   AND APPLICATIONS MEETING
LA English
DT Proceedings Paper
CT 45th Annual Precise Time and Time Interval Systems and Applications
   Meeting (PTTI)
CY DEC 02-05, 2013
CL Bellevue, WA
AB demonstrate the functionality of a mercury capillary lamp with a diameter in the sub-mm range and deep ultraviolet (DUV)/ vacuum ultra-violet (VUV) radiation delivery via an optical fiber integrated with the capillary. DUV spectrum control is observed by varying the fabrication parameters such as buffer gas type and pressure, capillary diameter, electrical resonator design, and temperature. We also show spectroscopic data of the 199Hg+ hyper-fine transition at 40.5GHz when applying the above fiber optical design. We present efforts toward micro-plasma generation in hollow-core photonic crystal fiber with related optical design and theoretical estimations. This new approach towards a more practical DUV optical interface could benefit trapped ion clock developments for future ultra-stable frequency reference and time-keeping applications.
C1 [Yi, Lin; Burt, Eric A.; Huang, Shouhua; Tjoelker, Robert L.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
RP Yi, L (reprint author), CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
NR 10
TC 0
Z9 0
U1 0
U2 0
PU INST NAVIGATION
PI WASHINGTON
PA 815 15TH ST NW, STE 832, WASHINGTON, DC 20005 USA
PY 2013
BP 69
EP 74
PG 6
WC Engineering, Marine; Telecommunications
SC Engineering; Telecommunications
GA BC0TH
UT WOS:000349532400009
ER

PT B
AU Chen, YR
   Ameri, AA
   Alexander, JID
AF Chen, Yng-Ru
   Ameri, Ali A.
   Alexander, J. Iwan D.
GP ASME
TI ACOUSTIC ANALYSIS OF THE NREL PHASE VI WIND TURBINE
SO PROCEEDINGS OF THE ASME INTERNATIONAL MECHANICAL ENGINEERING CONGRESS
   AND EXPOSITION - 2012, VOL 7, PTS A-D
LA English
DT Proceedings Paper
CT ASME International Mechanical Engineering Congress and Exposition
CY NOV 09-15, 2012
CL Houston, TX
SP ASME
AB The goal of this work is to utilize computer simulation to predict the aerodynamic noise emitted from the NREL Phase VI Wind Turbine at the different revolutions per minute.
C1 [Chen, Yng-Ru; Alexander, J. Iwan D.] Case Western Reserve Univ, Cleveland, OH 44106 USA.
   [Ameri, Ali A.] Ohio State Univ, NASA, Glenn Res Ctr, Columbus, OH 43210 USA.
RP Chen, YR (reprint author), Case Western Reserve Univ, Cleveland, OH 44106 USA.
NR 6
TC 0
Z9 0
U1 0
U2 0
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-4523-3
PY 2013
BP 3151
EP 3152
PG 2
WC Engineering, Mechanical
SC Engineering
GA BC1GH
UT WOS:000350071100359
ER

PT B
AU Tedder, SA
   Siedlak, DJL
   Carter, SG
   ReMine, DS
AF Tedder, Sarah A.
   Siedlak, Dennis J. L.
   Carter, Steven G.
   ReMine, Daniel S.
GP ASME
TI DEVELOPMENT OF FUEL DROPLET VAPORIZATION RATE MEASUREMENT TECHNIQUES FOR
   REALISTIC BURNING SPRAY APPLICATIONS
SO PROCEEDINGS OF THE ASME TURBO EXPO: TURBINE TECHNICAL CONFERENCE AND
   EXPOSITION, 2013, VOL 1A
LA English
DT Proceedings Paper
CT ASME Turbo Expo: Turbine Technical Conference and Exposition
CY JUN 03-07, 2013
CL San Antonio, TX
SP Int Gas Turbine Inst
ID STIMULATED RAMAN-SCATTERING; MORPHOLOGY-DEPENDENT RESONANCES; LASING
   SPECTROSCOPY; REFRACTIVE-INDEX; SIZE; FLUORESCENCE; WATER; JET
AB Technology to support design for the next generation of aircraft fuel injectors is being developed by NASA's Fundamental Aeronautics Program to reduce emissions, increase efficiency, and enable fuel flexible aircraft. The design of these fuel injectors can be aided by measuring the vaporization rates of jet fuel droplets in realistic, burning sprays. Currently, in this environment, no instantaneous vaporization rate measurement techniques have been applied. After surveying techniques for potential development for this application, two techniques were identified: stimulated Raman scattering (SRS) and droplet lasing spectroscopy (DLS). Plans were developed for the modification of these techniques for this specific application. Developments of the SRS technique were tested including measurement of a water droplet diameter change rate. SRS spectra were also collected from jet fuel droplets.
C1 [Tedder, Sarah A.] NASA, Glenn Res Ctr, Cleveland, OH 44135 USA.
   [Siedlak, Dennis J. L.] Case Western Reserve Univ, Cleveland, OH 44106 USA.
   [Carter, Steven G.] Univ Portland, Portland, OR 97203 USA.
   [ReMine, Daniel S.] Univ Virginia, Charlottesville, VA 22904 USA.
RP Tedder, SA (reprint author), NASA, Glenn Res Ctr, Cleveland, OH 44135 USA.
EM sarah.a.tedder@nasa.gov
NR 27
TC 0
Z9 0
U1 0
U2 1
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-5510-2
PY 2013
AR V001T04A052
PG 11
WC Engineering, Mechanical
SC Engineering
GA BD5DT
UT WOS:000361340900052
ER

PT B
AU Wey, C
   Bulzan, D
AF Wey, Changlie
   Bulzan, Dan
GP ASME
TI EFFECTS OF BIO-DERIVED FUELS ON EMISSIONS AND PERFORMANCE USING A
   9-POINT LEAN DIRECT INJECTION LOW EMISSIONS CONCEPT
SO PROCEEDINGS OF THE ASME TURBO EXPO: TURBINE TECHNICAL CONFERENCE AND
   EXPOSITION, 2013, VOL 1A
LA English
DT Proceedings Paper
CT ASME Turbo Expo: Turbine Technical Conference and Exposition
CY JUN 03-07, 2013
CL San Antonio, TX
SP Int Gas Turbine Inst
AB A 9-Point Lean Direct low emissions combustor concept was utilized to evaluate gaseous emissions performance of two bio-derived alternative jet fuels and a JP-8 fuel for comparison. Gaseous emissions were measured in a flame tube operating at inlet temperatures from 650 up to 1030 F, pressures of 150, 250, and 350 psia, and a range of fuel/air ratios. The alternative fuels consisted of a Hydroprocessed Esters and Fatty Acids Fuel made from tallow and a second bio derived fuel produced from direct fermentation of sugar.
C1 [Wey, Changlie] Vantage Partners LLC, Cleveland, OH 44142 USA.
   [Bulzan, Dan] NASA, Glenn Res Ctr, Cleveland, OH USA.
RP Wey, C (reprint author), Vantage Partners LLC, Cleveland, OH 44142 USA.
NR 15
TC 0
Z9 0
U1 0
U2 0
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-5510-2
PY 2013
AR UNSP V001T04A070
PG 8
WC Engineering, Mechanical
SC Engineering
GA BD5DT
UT WOS:000361340900070
ER

PT B
AU Howard, SA
   Hammer, JT
   Carney, KS
   Pereira, JM
AF Howard, Samuel A.
   Hammer, Jeremiah T.
   Carney, Kelly S.
   Pereira, J. Michael
GP ASME
TI JET ENGINE BIRD INGESTION SIMULATIONS: COMPARISON OF ROTATING TO
   NON-ROTATING FAN BLADES
SO PROCEEDINGS OF THE ASME TURBO EXPO: TURBINE TECHNICAL CONFERENCE AND
   EXPOSITION, 2013, VOL 2
LA English
DT Proceedings Paper
CT ASME Turbo Expo: Turbine Technical Conference and Exposition
CY JUN 03-07, 2013
CL San Antonio, TX
SP Int Gas Turbine Inst
ID STRIKING
AB Bird strike events in commercial airliners are a fairly common occurrence. According to data collected by the US Department of Agriculture, over 80,000 bird strikes were reported in the period 1990-2007 in the US alone [1]. As a result, bird ingestion is an important factor in aero engine design and FAA certification. When it comes to bird impacts on engine fan blades, the FAA requires full-scale bird ingestion tests on an engine running at full speed to pass certification requirements. These rotating tests are complex and very expensive. To reduce development costs associated with new materials for fan blades, it is desirable to develop more cost effective testing procedures than full-scale rotating engine tests for material evaluation. An impact test on a non-rotating single blade that captures most of the salient physics of the rotating test would go a long way towards enabling large numbers of evaluative material screening tests.
   NASA Glenn Research Center has been working to identify a static blade test procedure that would be effective at reproducing similar results as seen in rotating tests. The current effort compares analytical simulations of a bird strike on various non-rotating blades to a bird strike simulation on a rotating blade as a baseline case. Several different concepts for simulating the rotating loads on a non-rotating blade were analyzed with little success in duplicating the deformation results seen in the rotating case. The rotating blade behaves as if it were stiffer than the non-rotating blade resulting in less plastic deformation from a given bird impact. The key factor limiting the success of the non-rotating blade simulations is thought to be the effect of gyroscopics. Prior to this effort, it was anticipated the difficulty would be in matching the pre-stress in the blade due to centrifugal forces Additional work is needed to verify this assertion, and to determine if a static test procedure can simulate the gyroscopic effects in a suitable manner. This paper describes the various non-rotating concepts analyzed, and demonstrates the effect believed to be gyroscopic in nature on the results.
C1 [Howard, Samuel A.; Carney, Kelly S.; Pereira, J. Michael] NASA, Glenn Res Ctr, Cleveland, OH 44135 USA.
   [Hammer, Jeremiah T.] Ohio State Univ, Columbus, OH 43210 USA.
RP Howard, SA (reprint author), NASA, Glenn Res Ctr, Cleveland, OH 44135 USA.
NR 17
TC 0
Z9 0
U1 1
U2 1
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-5513-3
PY 2013
AR V002T01A032
PG 12
WC Engineering, Aerospace; Energy & Fuels; Engineering, Mechanical
SC Engineering; Energy & Fuels
GA BD5DW
UT WOS:000361341300032
ER

PT B
AU Boyle, RJ
   Parikh, AH
   Halbig, MC
   Nagpal, VK
AF Boyle, Robert J.
   Parikh, Ankur H.
   Halbig, Michael C.
   Nagpal, Vinod K.
GP ASME
TI Design Considerations for Ceramic Matrix Composite Vanes for High
   Pressure Turbine Applications
SO PROCEEDINGS OF THE ASME TURBO EXPO: TURBINE TECHNICAL CONFERENCE AND
   EXPOSITION, 2013, VOL 4
LA English
DT Proceedings Paper
CT ASME Turbo Expo: Turbine Technical Conference and Exposition
CY JUN 03-07, 2013
CL San Antonio, TX
SP Int Gas Turbine Inst
AB Issues associated with replacing conventional metallic vanes with Ceramic Matrix Composite(CMC) vanes in the first stage of the High Pressure Turbine(HPT) are explored. CMC materials have higher temperature capability than conventional HPT vanes, and less vane cooling is required. The benefits of less vane coolant are less NOx production and improved vane efficiency. Comparisons between CMC and metal vanes are made at current rotor inlet temperatures and at an vane inlet pressure of 50 atm. CMC materials have directionally dependent strength characteristics, and vane designs must accommodate these characteristics. The benefits of reduced NOx and improved cycle efficiency obtainable from using CMC vanes, are quantified Results are given for vane shapes made of a two dimensional CMC weave. Stress components due to thermal and pressure loads are shown for all configurations. The effects on stresses of: (1) a rib connecting vane pressure and suction surfaces; (2) variation in wall thickness; and (3) trailing edge region cooling options are discussed. The approach used to obtain vane temperature distributions is discussed. Film cooling and trailing edge ejection were required to avoid excessive vane material temperature gradients. Stresses due to temperature gradients are sometimes compressive in regions where pressure loads result in high tensile stresses.
C1 [Boyle, Robert J.; Parikh, Ankur H.; Nagpal, Vinod K.] N&R Engn & Management Serv, Parma Hts, OH 44130 USA.
   [Halbig, Michael C.] NASA Glenn Res Ctr, Cleveland, OH USA.
RP Boyle, RJ (reprint author), N&R Engn & Management Serv, Parma Hts, OH 44130 USA.
NR 18
TC 0
Z9 0
U1 0
U2 0
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-5518-8
PY 2013
AR V004T02A007
PG 16
WC Education, Scientific Disciplines; Energy & Fuels; Engineering,
   Mechanical; Materials Science, Ceramics
SC Education & Educational Research; Energy & Fuels; Engineering; Materials
   Science
GA BD5JI
UT WOS:000361499900007
ER

PT B
AU Culley, D
   Thomas, R
   Saus, J
AF Culley, Dennis
   Thomas, Randy
   Saus, Joseph
GP ASME
TI INTEGRATED TOOLS FOR FUTURE DISTRIBUTED ENGINE CONTROL TECHNOLOGIES
SO PROCEEDINGS OF THE ASME TURBO EXPO: TURBINE TECHNICAL CONFERENCE AND
   EXPOSITION, 2013, VOL 4
LA English
DT Proceedings Paper
CT ASME Turbo Expo: Turbine Technical Conference and Exposition
CY JUN 03-07, 2013
CL San Antonio, TX
SP Int Gas Turbine Inst
ID THE-LOOP SIMULATION
AB Turbine engines are highly complex mechanical systems that are becoming increasingly dependent on control technologies to achieve system performance and safety metrics. However, the contribution of controls to these measurable system objectives is difficult to quantify due to a lack of tools capable of informing the decision makers. This shortcoming hinders technology insertion in the engine design process. NASA Glenn Research Center is developing a Hardware-in-the-Loop (HIL) platform and analysis tool set that will serve as a focal point for new control technologies, especially those related to the hardware development and integration of distributed engine control. The HIL platform is intended to enable rapid and detailed evaluation of new engine control applications, from conceptual design through hardware development, in order to quantify their impact on engine systems. This paper discusses the complex interactions of the control system, within the context of the larger engine system, and how new control technologies are changing that paradigm. The conceptual design of the new HIL platform is then described as a primary tool to address those interactions and how it will help feed the insertion of new technologies into future engine systems.
C1 [Culley, Dennis; Thomas, Randy; Saus, Joseph] NASA Glenn Res Ctr, Cleveland, OH 44135 USA.
RP Culley, D (reprint author), NASA Glenn Res Ctr, Cleveland, OH 44135 USA.
NR 19
TC 0
Z9 0
U1 1
U2 1
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-5518-8
PY 2013
AR V004T06A017
PG 11
WC Education, Scientific Disciplines; Energy & Fuels; Engineering,
   Mechanical; Materials Science, Ceramics
SC Education & Educational Research; Energy & Fuels; Engineering; Materials
   Science
GA BD5JI
UT WOS:000361499900036
ER

PT B
AU May, RD
   Guo, TH
   Simon, DL
AF May, Ryan D.
   Guo, Ten-Huei
   Simon, Donald L.
GP ASME
TI AN APPROACH TO DETECT AND MITIGATE ICE PARTICLE ACCRETION IN AIRCRAFT
   ENGINE COMPRESSION SYSTEMS
SO PROCEEDINGS OF THE ASME TURBO EXPO: TURBINE TECHNICAL CONFERENCE AND
   EXPOSITION, 2013, VOL 4
LA English
DT Proceedings Paper
CT ASME Turbo Expo: Turbine Technical Conference and Exposition
CY JUN 03-07, 2013
CL San Antonio, TX
SP Int Gas Turbine Inst
AB The accretion of ice in the compression system of commercial gas turbine engines operating in high ice water content conditions is a safety issue being studied by the aviation sector. While most of the research focuses on the underlying physics of ice accretion and the meteorological conditions in which accretion can occur, a systems-level perspective on the topic lends itself to potential near-term operational improvements. This work focuses on developing an accurate and reliable algorithm for detecting the accretion of ice in the low pressure compressor of a generic 40,000 lb(f) thrust class. engine. The algorithm uses only the two shaft speed sensors and works regardless of engine age, operating condition, and power level. In a 10,000-case Monte Carlo simulation, the detection approach was found to have excellent capability at determining ice accretion from sensor noise with detection occurring when ice blocks an average of 6.8% of the low pressure compressor area. Finally, an initial study highlights a potential mitigation strategy that uses the existing engine actuators to raise the temperature in the low pressure compressor in an effort to reduce the rate at which ice accretes.
C1 [May, Ryan D.] Vantage Partners LLC, Cleveland, OH 44142 USA.
   [Guo, Ten-Huei; Simon, Donald L.] NASA Glenn Res Ctr, Cleveland, OH USA.
RP May, RD (reprint author), Vantage Partners LLC, Cleveland, OH 44142 USA.
EM ryan.d.may@nasa.gov; ten-huei.guo-1@nasa.gov; donald.l.simon@nasa.gov
NR 14
TC 0
Z9 0
U1 0
U2 0
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-5518-8
PY 2013
AR V004T06A013
PG 10
WC Education, Scientific Disciplines; Energy & Fuels; Engineering,
   Mechanical; Materials Science, Ceramics
SC Education & Educational Research; Energy & Fuels; Engineering; Materials
   Science
GA BD5JI
UT WOS:000361499900032
ER

PT B
AU Simon, DL
   Borguet, S
   Leonard, O
   Zhang, XD
AF Simon, Donald L.
   Borguet, Sebastien
   Leonard, Olivier
   Zhang, Xiaodong (Frank)
GP ASME
TI AIRCRAFT ENGINE GAS PATH DIAGNOSTIC METHODS: PUBLIC BENCHMARKING RESULTS
SO PROCEEDINGS OF THE ASME TURBO EXPO: TURBINE TECHNICAL CONFERENCE AND
   EXPOSITION, 2013, VOL 4
LA English
DT Proceedings Paper
CT ASME Turbo Expo: Turbine Technical Conference and Exposition
CY JUN 03-07, 2013
CL San Antonio, TX
SP Int Gas Turbine Inst
AB Recent technology reviews have identified the need for objective assessments of aircraft engine health management (EHM) technologies. To help address this issue, a gas path diagnostic benchmark problem has been created and made publicly available. This software tool, referred to as the Propulsion Diagnostic Method Evaluation Strategy (ProDiMES), has been constructed based on feedback provided by the aircraft EHM community. It provides a standard benchmark problem enabling users to develop, evaluate and compare diagnostic methods. This paper will present an overview of ProDiMES along with a description of four gas path diagnostic methods developed and applied to the problem. These methods, which include analytical and empirical diagnostic techniques, will be described and associated blind-test-case metric results will be presented and compared. Lessons learned along with recommendations for improving the public benchmarking processes will also be presented and discussed.
C1 [Simon, Donald L.] NASA Glenn Res Ctr, Cleveland, OH 44135 USA.
   [Borguet, Sebastien; Leonard, Olivier] Univ Liege, Liege, Belgium.
   [Zhang, Xiaodong (Frank)] Wright State Univ, Dayton, OH 45435 USA.
RP Simon, DL (reprint author), NASA Glenn Res Ctr, Cleveland, OH 44135 USA.
NR 13
TC 0
Z9 0
U1 0
U2 0
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-5518-8
PY 2013
AR V004T06A014
PG 13
WC Education, Scientific Disciplines; Energy & Fuels; Engineering,
   Mechanical; Materials Science, Ceramics
SC Education & Educational Research; Energy & Fuels; Engineering; Materials
   Science
GA BD5JI
UT WOS:000361499900033
ER

PT B
AU Alvin, MA
   Gleeson, B
   Klotz, K
   McMordie, B
   Warnes, B
   Zhu, D
AF Alvin, M. A.
   Gleeson, B.
   Klotz, K.
   McMordie, B.
   Warnes, B.
   Zhu, D.
GP ASME
TI EXTREME TEMPERATURE COATINGS FOR FUTURE GAS TURBINE ENGINES
SO PROCEEDINGS OF THE ASME TURBO EXPO: TURBINE TECHNICAL CONFERENCE AND
   EXPOSITION, 2013, VOL 5A
LA English
DT Proceedings Paper
CT ASME Turbo Expo: Turbine Technical Conference and Exposition
CY JUN 03-07, 2013
CL San Antonio, TX
SP Int Gas Turbine Inst
ID THERMAL BARRIER COATINGS
AB The National Energy Technology Laboratory-Regional University Alliance (NETL-RUA) has been developing extreme temperature coating systems that consist of a diffusion barrier coating (DBC), a low-cost wet slurry bond coat, a commercial yttria stabilized zirconia (YSZ) thermal barrier coating (TBC), and an extreme temperature external coating that are deposited along the surface of nickel-based superalloys and single crystal metal substrates. Thermal cyclic testing of these multi-layer coatings was conducted in steam-containing environments at temperatures ranging between 1100-1550 degrees C. This paper discusses the response of these materials during bench-scale testing, and their potential use in advanced H- and J-class land-based gas turbine engines.
C1 [Alvin, M. A.] US DOE Natl Energy Technol Lab, Pittsburgh, PA 15236 USA.
   [Gleeson, B.] Univ Pittsburgh, Pittsburgh, PA 15261 USA.
   [Klotz, K.; McMordie, B.] Coatings Ind, Souderton, PA 18964 USA.
   [Warnes, B.] Corros Control Consultants Inc, Beaver, PA 15009 USA.
   [Zhu, D.] NASA Glenn Res Ctr, Cleveland, OH 44135 USA.
RP Alvin, MA (reprint author), US DOE Natl Energy Technol Lab, Pittsburgh, PA 15236 USA.
NR 11
TC 0
Z9 0
U1 0
U2 0
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-5519-5
PY 2013
AR V05AT21A003
PG 10
WC Engineering, Marine; Engineering, Mechanical; Materials Science,
   Multidisciplinary
SC Engineering; Materials Science
GA BD5JJ
UT WOS:000361500100013
ER

PT B
AU Bozak, R
   Hughes, C
   Buckley, J
AF Bozak, Rick
   Hughes, Christopher
   Buckley, James
GP ASME
TI THE AERODYNAMIC PERFORMANCE OF AN OVER-THE-ROTOR LINER WITH
   CIRCUMFERENTIAL GROOVES ON A HIGH BYPASS RATIO TURBOFAN ROTOR
SO PROCEEDINGS OF THE ASME TURBO EXPO: TURBINE TECHNICAL CONFERENCE AND
   EXPOSITION, 2013, VOL 6A
LA English
DT Proceedings Paper
CT ASME Turbo Expo: Turbine Technical Conference and Exposition
CY JUN 03-07, 2013
CL San Antonio, TX
SP Int Gas Turbine Inst
AB While liners have been utilized throughout turbofan ducts to attenuate fan noise, additional attenuation is obtainable by placing an acoustic liner over-the-rotor. Previous experiments have shown significant fan performance losses when acoustic liners are installed over-the-rotor. The fan blades induce an oscillating flow in the acoustic liners which results in a performance loss near the blade tip. An over-the-rotor liner was designed with circumferential grooves between the fan blade tips and the acoustic liner to reduce the oscillating flow in the acoustic liner. An experiment was conducted in the W-8 Single-Stage Axial Compressor Facility at NASA Glenn Research Center on a 1.5 pressure ratio fan to evaluate the impact of this over-the-rotor treatment design on fan aerodynamic performance. The addition of a circumferentially grooved over-the-rotor design between the fan blades and the acoustic liner reduced the performance loss, in terms of fan adiabatic efficiency, to less than I% which is within the repeatability of this experiment.
C1 [Bozak, Rick; Hughes, Christopher] NASA Glenn Res Ctr, Cleveland, OH 44135 USA.
   [Buckley, James] Vantage Partners, Brookpark, OH USA.
RP Bozak, R (reprint author), NASA Glenn Res Ctr, Cleveland, OH 44135 USA.
NR 9
TC 0
Z9 0
U1 0
U2 0
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-5522-5
PY 2013
AR V06AT35A026
PG 8
WC Engineering, Mechanical
SC Engineering
GA BD5JL
UT WOS:000361500500026
ER

PT B
AU McVetta, AB
   Giel, PW
   Welch, GE
AF McVetta, Ashlie B.
   Giel, Paul W.
   Welch, Gerard E.
GP ASME
TI AERODYNAMIC MEASUREMENTS OF A VARIABLE-SPEED POWER-TURBINE BLADE SECTION
   IN A TRANSONIC TURBINE CASCADE AT LOW INLET TURBULENCE
SO PROCEEDINGS OF THE ASME TURBO EXPO: TURBINE TECHNICAL CONFERENCE AND
   EXPOSITION, 2013, VOL 6A
LA English
DT Proceedings Paper
CT ASME Turbo Expo: Turbine Technical Conference and Exposition
CY JUN 03-07, 2013
CL San Antonio, TX
SP Int Gas Turbine Inst
ID BOUNDARY-LAYER; BEHAVIOR
AB Aerodynamic measurements obtained in a transonic linear cascade were used to assess the impact of large incidence angle and Reynolds number variations on the 3-D flow field and midspan loss and turning of a 2-D section of a variable-speed power-turbine (VSPT) rotor blade. Steady-state data were obtained for ten incidence angles ranging from +15.8 degrees to -51.0 degrees. At each angle, data were acquired at five flow conditions with the exit Reynolds number (based on axial chord) varying over an order-of-magnitude from 2.12 x 10(5) to 2.12 x 10(6). Data were obtained at the design exit Mach number of 0.72 and at a reduced exit Mach number of 0.35 as required to achieve the lowest Reynolds number. Midspan total-pressure and exit flow angle data were acquired using a five-hole pitch/yaw probe surveyed on a plane located 7.0 percent axial-chord downstream of the blade trailing edge plane. The survey spanned three blade passages. Additionally, three-dimensional half-span flow fields were examined with additional probe survey data acquired at 26 span locations for two key incidence angles of +5.8 degrees and -36.7 degrees. Survey data near the endwall were acquired with a three-hole boundary-layer probe. The data were integrated to determine average exit total-pressure and flow angle as functions of incidence and flow conditions. The data set also includes blade static pressures measured on four spanwise planes and endwall static pressures. Tests were conducted in the NASA Glenn Transonic Turbine Blade Cascade Facility. The measurements reflect strong secondary flows associated with the high aerodynamic loading levels at large positive incidence angles and an increase in loss levels with decreasing Reynolds number. The secondary flows decrease with negative incidence as the blade becomes unloaded. Transitional flow is admitted in this low inlet turbulence dataset, making it a challenging CFD test case. The dataset will be used to advance understanding of the aerodynamic challenges associated with maintaining efficient power turbine operation over a wide shaft-speed range.
C1 [McVetta, Ashlie B.; Welch, Gerard E.] NASA, Glenn Res Ctr, Cleveland, OH 44135 USA.
   [Giel, Paul W.] Vantage Partners LLC, Cleveland, OH USA.
RP McVetta, AB (reprint author), NASA, Glenn Res Ctr, Cleveland, OH 44135 USA.
EM Ashlie.B.Mcvetta@nasa.gov; Paul.W.Giel@nasa.gov; Gerard.E.Welch@nasa.gov
NR 24
TC 0
Z9 0
U1 0
U2 0
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-5522-5
PY 2013
AR V06AT36A018
PG 14
WC Engineering, Mechanical
SC Engineering
GA BD5JL
UT WOS:000361500500059
ER

PT B
AU Ameri, AA
   Giel, PW
   McVetta, AB
AF Ameri, Ali A.
   Giel, Paul W.
   McVetta, Ashlie B.
GP ASME
TI Validation of a CFD Methodology for Variable Speed Power Turbine
   Relevant Conditions
SO PROCEEDINGS OF THE ASME TURBO EXPO: TURBINE TECHNICAL CONFERENCE AND
   EXPOSITION, 2013, VOL 6B
LA English
DT Proceedings Paper
CT ASME Turbo Expo: Turbine Technical Conference and Exposition
CY JUN 03-07, 2013
CL San Antonio, TX
SP Int Gas Turbine Inst
ID TRANSITION; FLOWS
AB Analysis tools are needed to investigate aerodynamic performance of Variable-Speed Power Turbines (VSPT) for rotorcraft applications. The VSPT operates at low Reynolds numbers (transitional flow) and over a wide range of incidence. Previously, the capabilities of a published three-equation transition and turbulence model in predicting the transition location for three-dimensional heat transfer problems were assessed. In this paper, results are presented of a post-diction exercise using a three-dimensional flow in a transonic linear cascade comprising VSPT blading. The measured pressure distributions and integrated spanwise total pressure losses and flow angles for two incidence angles corresponding to cruise (i =+5.8 degrees) and takeoff (i =-36.7 degrees) were used for this study. For the higher loading condition of cruise and the negative incidence condition of takeoff, overall agreement with data may be considered satisfactory but areas of needed improvement are also indicated.
C1 [Ameri, Ali A.] Ohio State Univ, Dept Mech & Aerosp Engn, Columbus, OH 43235 USA.
   [Giel, Paul W.] Vantage Partners LLC, Cleveland, OH USA.
   [McVetta, Ashlie B.] NASA Glenn Res Ctr, Cleveland, OH USA.
RP Ameri, AA (reprint author), Ohio State Univ, Dept Mech & Aerosp Engn, Columbus, OH 43235 USA.
NR 21
TC 0
Z9 0
U1 0
U2 0
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-5523-2
PY 2013
AR V06BT37A027
PG 10
WC Engineering, Mechanical; Operations Research & Management Science
SC Engineering; Operations Research & Management Science
GA BD5XE
UT WOS:000361866000027
ER

PT B
AU Bruna, D
   Turner, MG
AF Bruna, Dario
   Turner, Mark G.
GP ASME
TI A ROTHALPY ANALYSIS FOR THE ISOTHERMAL BOUNDARY CONDITION AT CASING
   APPLIED TO THE ROTOR 37 TRANSONIC AXIAL FLOW COMPRESSOR
SO PROCEEDINGS OF THE ASME TURBO EXPO: TURBINE TECHNICAL CONFERENCE AND
   EXPOSITION, 2013, VOL 6B
LA English
DT Proceedings Paper
CT ASME Turbo Expo: Turbine Technical Conference and Exposition
CY JUN 03-07, 2013
CL San Antonio, TX
SP Int Gas Turbine Inst
ID TIP-CLEARANCE; TURBOMACHINES; CONSERVATION; PERFORMANCE
AB CFD simulations have been set-up with an isothermal boundary condition at the casing for running the NASA Rotor 37 axial compressor. The casing temperature was set to the inlet total temperature. The comparison to data was much improved for the efficiency for the 100% speed line relative to the adiabatic simulations. The efficiency difference between the isothermal and adiabatic solutions is about 1%, with the isothermal calculation matching the low flow test condition. The profiles of total temperature with the isothermal boundary condition matched the data near the casing without any overshoot, typical of most compressor calculations. Also the efficiency profile had a similar improvement in matching the data because of its relationship to temperature.
   A similar comparison between isothermal and adiabatic cases has been carried out for the same geometry with double the design clearance. The working range based on the steady CFD calculations is about half that of the design clearance case which is felt to be realistic.
   Moreover a detailed analysis based on conservation of Rothalpy has been made and applied to the rotor. Mass averaged Rothalpy is not conserved due to a frictional power term associated with the stationary case as well as heat transfer. The effects of these terms show the extent of the heat transfer is between 10-20% of span away from the casing.
   The heat transfer effect calculated with the isothermal boundary condition simulation is thought to be real, and accounting for it matches data better than using an adiabatic assumption. However, the real rig would probably not be isothermal at the casing and may require more complex simulations such as a conjugate heat transfer approach.
C1 [Bruna, Dario] NASA, Glenn Res Ctr, Cleveland, OH 44135 USA.
   [Turner, Mark G.] Univ Cincinnati, Cincinnati, OH 45221 USA.
RP Bruna, D (reprint author), NASA, Glenn Res Ctr, Cleveland, OH 44135 USA.
EM dariobruna@fastwebnet.it; mark.turner@uc.edu
NR 29
TC 0
Z9 0
U1 0
U2 0
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-5523-2
PY 2013
AR UNSP V06BT37A011
PG 16
WC Engineering, Mechanical; Operations Research & Management Science
SC Engineering; Operations Research & Management Science
GA BD5XE
UT WOS:000361866000011
ER

PT B
AU Florea, RV
   Voytovych, D
   Tillman, G
   Stucky, M
   Shabbir, A
   Sharma, O
   Arend, DJ
AF Florea, Razvan V.
   Voytovych, Dmytro
   Tillman, Gregory
   Stucky, Mark
   Shabbir, Aamir
   Sharma, Om
   Arend, David J.
GP ASME
TI AERODYNAMIC ANALYSIS OF A BOUNDARY-LAYER-INGESTING DISTORTION-TOLERANT
   FAN
SO PROCEEDINGS OF THE ASME TURBO EXPO: TURBINE TECHNICAL CONFERENCE AND
   EXPOSITION, 2013, VOL 6B
LA English
DT Proceedings Paper
CT ASME Turbo Expo: Turbine Technical Conference and Exposition
CY JUN 03-07, 2013
CL San Antonio, TX
SP Int Gas Turbine Inst
AB The paper describes the aerodynamic CFD analysis that was conducted to address the integration of an embedded-engine (EE) inlet with the fan stage. A highly airframe-integrated, distortion-tolerant propulsion preliminary design study was carried out to quantify fuel burn benefits associated with boundary layer ingestion (BLI) for "N+2" blended wing body (BWB) concepts. The study indicated that low-loss inlets and high-performance, distortion-tolerant turbomachines are key technologies required to achieve a 3-5% BLI fuel burn benefit relative to a baseline high-performance, pylon-mounted, propulsion system. A hierarchical, multi-objective, computational fluid dynamics-based aerodynamic design optimization that combined global and local shaping was carried out to design a high-performance embedded-engine inlet and an associated fan stage. The scaled-down design will be manufactured and tested in NASA's 8'x6' Transonic Wind Tunnel. Unsteady. calculations were performed for the coupled inlet and fan rotor and inlet, fan rotor and exit guide vanes. The calculations show that the BLI distortion propagates through the fan largely un-attenuated. The impact of distortion on the unsteady blade loading, fan rotor and fan stage efficiency and pressure ratio is analyzed. The fan stage pressure ratio is provided as a time-averaged and full-wheel circumferential-averaged value. Computational analyses were performed to validate the system study and design-phase predictions in terms of fan stage performance and operability. For example, fan stage efficiency losses are less than 0.5-1.5% when compared to a fan stage in clean flow. In addition, these calculations will be used to provide pretest predictions and guidance for risk mitigation for the wind tunnel test.
C1 [Florea, Razvan V.; Voytovych, Dmytro; Tillman, Gregory; Stucky, Mark; Shabbir, Aamir; Sharma, Om] United Technol Res Ctr, E Hartford, CT 06108 USA.
   [Arend, David J.] NASA, Glenn Res Ctr Lewis Field, Cleveland, OH USA.
RP Florea, RV (reprint author), United Technol Res Ctr, E Hartford, CT 06108 USA.
NR 7
TC 0
Z9 0
U1 1
U2 2
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-5523-2
PY 2013
AR V06BT38A006
PG 7
WC Engineering, Mechanical; Operations Research & Management Science
SC Engineering; Operations Research & Management Science
GA BD5XE
UT WOS:000361866000051
ER

PT B
AU Brown, AM
   Davis, RB
   DeHaye, MK
AF Brown, Andrew M.
   Davis, R. Benjamin
   DeHaye, Michael K.
GP ASME
TI IMPLEMENTATION OF SPEED VARIATION IN THE STRUCTURAL DYNAMIC ASSESSMENT
   OF TURBOMACHINERY FLOW PATH COMPONENTS
SO PROCEEDINGS OF THE ASME TURBO EXPO: TURBINE TECHNICAL CONFERENCE AND
   EXPOSITION, 2013, VOL 7B
LA English
DT Proceedings Paper
CT ASME Turbo Expo: Turbine Technical Conference and Exposition
CY JUN 03-07, 2013
CL San Antonio, TX
SP Int Gas Turbine Inst
ID TIME-VARYING FREQUENCY
AB During the design of turbomachinery flow path components, the assessment of possible structural resonant conditions is critical. Higher frequency modes of these structures are frequently found to be subject to resonance, and in these cases, design criteria require a forced response analysis of the structure with the assumption that the excitation speed exactly equals the resonant frequency. The design becomes problematic if the response analysis shows a violation of the HCF criteria. One possible solution is to perform "finite-life" analysis, where Miner's rule is used to calculate the actual life in seconds in comparison to the required life. In this situation, it is beneficial to incorporate the fact that, for a variety of turbomachinery control reasons, the speed of the rotor does not actually dwell at a single value but instead dithers about a nominal mean speed and during the time that the excitation frequency is not equal to the resonant frequency, the damage accumulated by the structure is diminished significantly. Building on previous investigations into this process, we show that a steady-state assumption of the response is extremely accurate for this typical case, resulting in the ability to quickly account for speed variation in the finite-life analysis of a component which has previously had its peak dynamic stress at resonance calculated. A technique using Monte Carlo simulation is also presented which can be used when specific speed time histories are not available. The implementation of these techniques can prove critical for successful turbopump design, as the improvement in life when speed variation is considered is shown to be greater than a factor of two.
C1 [Brown, Andrew M.; Davis, R. Benjamin; DeHaye, Michael K.] NASA, George C Marshall Space Flight Ctr, Prop Struct & Dynam Anal ER41, Huntsville, AL 35812 USA.
RP Brown, AM (reprint author), NASA, George C Marshall Space Flight Ctr, Prop Struct & Dynam Anal ER41, Huntsville, AL 35812 USA.
NR 7
TC 0
Z9 0
U1 0
U2 0
PU AMER SOC MECHANICAL ENGINEERS
PI NEW YORK
PA THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
BN 978-0-7918-5527-0
PY 2013
AR V07BT31A014
PG 8
WC Engineering, Mechanical
SC Engineering
GA BD5ZB
UT WOS:000361919900043
ER

PT J
AU Iwashita, Y
   Ryoo, MS
   Fuchs, TJ
   Padgett, C
AF Iwashita, Yumi
   Ryoo, M. S.
   Fuchs, Thomas J.
   Padgett, Curtis
BE Burghardt, T
   Damen, D
   MayolCuevas, W
   Mirmehdi, M
TI Recognizing Humans in Motion: Trajectory-based Aerial Video Analysis
SO PROCEEDINGS OF THE BRITISH MACHINE VISION CONFERENCE 2013
LA English
DT Proceedings Paper
CT 24th British Machine Vision Conference
CY SEP 09-13, 2013
CL Bristol, ENGLAND
SP Qualcomm, Dyson, Microsoft Res, Inst Engn Technol Journals, HP
ID TRACKING
AB We propose a novel method for recognizing people in aerial surveillance videos. Aerial surveillance images cover a wide area at low resolution. In order to detect objects (e.g., pedestrians) from such videos, conventional methods either utilize appearance information from raw videos or extract blob information from background subtraction results. However, people seen in low resolution images have less appearance information, and hence are very difficulty to classify based on their appearance or blob size. In addition, due to heavy camera movements caused by aerial vehicle ego-motion and wind, the system is expected to generate many noisy false detections including parallax. The idea presented in this paper is to detect and classify objects from aerial videos based on their motion: we analyze a trajectory of each object candidate, deciding whether it is a person-of-interest or simple noise based on how it moved. After objects are tracked by a Kalman filter-based tracking, we represent their motion as multi-scale histograms of 'orientation changes', which efficiently captures movements displayed by objects. Random forest classifiers are applied to our new representation to make the decision. The experimental results illustrate that our approach recognizes objects-of-interest (i.e., humans) even when there exist a large number of false detection/tracking, and it does it more reliably compared to the approaches with previous paradigm.
C1 [Iwashita, Yumi; Ryoo, M. S.; Fuchs, Thomas J.; Padgett, Curtis] CALTECH, Jet Prop Lab, Pasadena, CA 91125 USA.
RP Iwashita, Y (reprint author), CALTECH, Jet Prop Lab, Pasadena, CA 91125 USA.
EM yumi@ieee.org; mryoo@jpl.nasa.gov; Thomas.Fuchs@jpl.nasa.gov;
   curtis.w.padgett@jpl.nasa.gov
NR 18
TC 0
Z9 0
U1 0
U2 1
PU B M V A PRESS
PI GUILDFORD
PA 49A ELMSIDE ONSLOW VILLAGE, GUILDFORD, SURREY GU2 5SX, ENGLAND
PY 2013
DI 10.5244/C.27.127
PG 11
WC Computer Science, Artificial Intelligence
SC Computer Science
GA BB8CH
UT WOS:000346352700124
ER

PT B
AU Lee, CM
   Searby, ND
   Hemmings, SN
AF Lee, Christine M.
   Searby, Nancy D.
   Hemmings, Sarah N.
GP IEEE
TI Using Earth Observations to Enhance Water Resources Decision-making and
   Disaster Assessment Processes in the United States and the Developing
   World An overview of water-related projects within the NASA Applied
   Sciences Program
SO PROCEEDINGS OF THE THIRD 2013 IEEE GLOBAL HUMANITARIAN TECHNOLOGY
   CONFERENCE (GHTC 2013)
LA English
DT Proceedings Paper
CT 3rd IEEE Global Humanitarian Technology Conference (GHTC)
CY OCT 20-23, 2013
CL San Jose, CA
SP IEEE, IEEE Reg 6, Inst Elect & Elect Engineers, San Francisco Bay Area Council, IEEE Humanitarian Activities AdHoc Comm, IEEE Seattle Sect, US Agcy Int Dev, Community Solut Initiat, IEEE Fdn, IEEE Special Interest Grp Humanitarian Technol, Coughlin Associates, IEEE Components, Packaging & Mfg Technol Soc, IEEE USA, IEEE Comm Earth Observat, Engn Change
DE applied sciences; capacity building; decision-making; disasters; Earth
   observation; end users; flooding; NASA; remote sensing; satellite; water
   resources
AB This paper provides an overview and discussion of water-related Applied Sciences Program (ASP) activities within the National Aeronautics and Space Administration (NASA) Earth Science Division. These activities seek to enhance decision-making processes that relate to water resources and disaster assessment in the United States (U.S.) and abroad. We evaluate the various approaches that are employed to improve the utility of and access to Earth observations in decision support for water challenges; in particular, we consider the development of applications and activities that strengthen capacity to use these applications. Applications include products like maps, decision support system improvements and tools, and related services. This paper also identifies potential next steps for continuing to facilitate a coordinated water strategy amongst the Applied Sciences Applications Areas and the ASP Capacity Building Program.
C1 [Lee, Christine M.] NASA Headquarters, Amer Assoc Adv Sci, Div Earth Sci, Washington, DC 20546 USA.
   [Searby, Nancy D.] NASA Headquarters, Appl Sci Prog, Div Earth Sci, Washington, DC 20546 USA.
   [Hemmings, Sarah N.] NASA Headquarters, Univ Space Res Assoc, Div Earth Sci, Washington, DC 20546 USA.
RP Lee, CM (reprint author), NASA Headquarters, Amer Assoc Adv Sci, Div Earth Sci, Washington, DC 20546 USA.
EM christine.m.lee@nasa.gov; nancy.d.searby@nasa.gov;
   sarah.n.hemmings@nasa.gov
NR 9
TC 0
Z9 0
U1 0
U2 1
PU IEEE
PI NEW YORK
PA 345 E 47TH ST, NEW YORK, NY 10017 USA
BN 978-1-4799-2401-1; 978-1-4799-2402-8
PY 2013
BP 506
EP +
PG 3
WC Engineering, Multidisciplinary
SC Engineering
GA BC1BC
UT WOS:000349918000094
ER

PT B
AU Lampens, P
   Tkachenko, A
   Lehmann, H
   Debosscher, J
   Aerts, C
   Beck, PG
   Bloemen, S
   Kochiashvili, N
   Derekas, A
   Smith, J
   Tenenbaum, P
   Twicken, J
AF Lampens, P.
   Tkachenko, A.
   Lehmann, H.
   Debosscher, J.
   Aerts, C.
   Beck, P. G.
   Bloemen, S.
   Kochiashvili, N.
   Derekas, A.
   Smith, J.
   Tenenbaum, P.
   Twicken, J.
BE Shibahashi, H
   LynasGray, AE
TI Puzzling Low-Frequency Variations in the delta Scuti-type Kepler Star
   KIC 5988140 (HD 188774)
SO PROGRESS IN PHYSICS OF THE SUN AND STARS: A NEW ERA IN HELIO- AND
   ASTEROSEISMOLOGY
SE Astronomical Society of the Pacific Conference Series
LA English
DT Proceedings Paper
CT 3rd International Conference on Helioseismology and Asteroseismology
CY NOV 25-29, 2012
CL Hakone, JAPAN
SP Fujihara Fdn Sci, Global Ctr Excellence Phys Sci Frontier
AB At first sight, the Kepler data of the A-type star KIC 5988140 mimics the light curve of an eclipsing binary system with a superposed short-period variability of type delta Scuti. It was attributed by the Kepler Asteroseismology Consortium (KASC) to the working group "Binary and Multiple Stars", where we picked it up. We used the high-quality space photometry supplemented by recent high-resolution spectra to investigate the cause of the variability of this late A-type object. We considered three different possible scenarios: (1) binarity, (2) co-existence of gamma Doradus and delta Scuti pulsations (the hybrid case) and (3) rotation of the stellar surface with an asymmetric intensity distribution (i.e. rotational modulation). We confirm the presence of various pressure modes of type delta Scuti. However, none of the previous scenarios is capable of reproducing all of the observed characteristics of the variations. Thus, the cause of the remaining light and radial velocity variations remains presently unexplained by any of the considered physical processes.
C1 [Lampens, P.] Koninklijke Sterrenwacht Belgie, Brussels, Belgium.
   [Tkachenko, A.; Debosscher, J.; Aerts, C.; Beck, P. G.; Bloemen, S.] Katholieke Univ Leuven, Inst Sterrenkunde, Leuven, Belgium.
   [Lehmann, H.] Thuringer Landessternwarte Tautenburg, Tautenburg, Germany.
   [Aerts, C.] Radboud Univ Nijmegen, Dept Astrophys, NL-6525 ED Nijmegen, Netherlands.
   [Kochiashvili, N.] Ilia State Univ, Abastumani, Rep of Georgia.
   [Derekas, A.] Hungarian Acad Sci, Konkoly Observ, Budapest, Hungary.
   [Smith, J.; Tenenbaum, P.; Twicken, J.] NASA, Ames Res Ctr, SETI Inst, Moffett Field, CA 94035 USA.
RP Lampens, P (reprint author), Koninklijke Sterrenwacht Belgie, Brussels, Belgium.
NR 11
TC 1
Z9 1
U1 0
U2 0
PU ASTRONOMICAL SOC PACIFIC
PI SAN FRANCISCO
PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 USA
BN 978-1-58381-842-8
J9 ASTR SOC P
PY 2013
VL 479
BP 99
EP 104
PG 6
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA BE6CA
UT WOS:000373870500012
ER

PT B
AU Stello, D
   Huber, D
   Bedding, TR
   Benomar, O
   Bildsten, L
   Elsworth, Y
   Gilliland, RL
   Mosser, B
   Paxton, B
   White, TR
AF Stello, Dennis
   Huber, Daniel
   Bedding, Timothy R.
   Benomar, Othman
   Bildsten, Lars
   Elsworth, Yvonne
   Gilliland, Ronald L.
   Mosser, Benoit
   Paxton, Bill
   White, Timothy R.
BE Shibahashi, H
   LynasGray, AE
TI Period Spacings of Most Red Giants Observed by Kepler
SO PROGRESS IN PHYSICS OF THE SUN AND STARS: A NEW ERA IN HELIO- AND
   ASTEROSEISMOLOGY
SE Astronomical Society of the Pacific Conference Series
LA English
DT Proceedings Paper
CT 3rd International Conference on Helioseismology and Asteroseismology
CY NOV 25-29, 2012
CL Hakone, JAPAN
SP Fujihara Fdn Sci, Global Ctr Excellence Phys Sci Frontier
ID SOLAR-LIKE OSCILLATIONS; STELLAR ASTROPHYSICS MESA; OPEN CLUSTERS;
   MIXED-MODES; NGC 6791; STARS; ASTEROSEISMOLOGY; ROTATION; MODULES; COROT
AB Of the more than 150 000 targets followed by the Kepler mission, about 10% were selected as red giants. Due to their high scientific value, in particular for Galaxy population studies and stellar structure and evolution, their Kepler light curves were made public in late 2011. More than 13 000 (over 85%) of these stars show intrinsic flux variability caused by solar-like oscillations making them ideal for large scale asteroseismic investigations. We automatically extracted individual frequencies and measured the period spacings of the dipole modes in nearly every red giant. These measurements naturally classify the stars into various populations, such as the Red Giant Branch, the low-mass (M/M-circle dot less than or similar to 1.8) helium-core-burning Red Clump, and the higher-mass (M/M-circle dot greater than or similar to 1.8) secondary clump. The period spacings also reveal that a large fraction of the stars show rotationally induced frequency splittings. This sample of stars will undoubtedly provide an extremely valuable source for studying the stellar population in the direction of the Kepler field, in particular when combined with complementary spectroscopic surveys.
C1 [Stello, Dennis; Bedding, Timothy R.; Benomar, Othman; White, Timothy R.] Univ Sydney, Sch Phys, Sydney Inst Astron SIfA, Sydney, NSW 2006, Australia.
   [Stello, Dennis; Bedding, Timothy R.; Benomar, Othman; White, Timothy R.] Aarhus Univ, Dept Phys & Astron, Stellar Astrophys Ctr, DK-8000 Aarhus C, Denmark.
   [Huber, Daniel] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
   [Bildsten, Lars; Paxton, Bill] Univ Calif Santa Barbara, Kavli Inst Theoret Phys, Santa Barbara, CA 93106 USA.
   [Bildsten, Lars] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA.
   [Elsworth, Yvonne] Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England.
   [Gilliland, Ronald L.] Penn State Univ, Ctr Exoplanetr & Habitable Worlds, University Pk, PA 16802 USA.
   [Mosser, Benoit] Univ Paris 07, Univ Paris 06, Observ Paris, LESIA,CNRS, F-92195 Meudon, France.
RP Stello, D (reprint author), Univ Sydney, Sch Phys, Sydney Inst Astron SIfA, Sydney, NSW 2006, Australia.
NR 39
TC 0
Z9 0
U1 0
U2 0
PU ASTRONOMICAL SOC PACIFIC
PI SAN FRANCISCO
PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 USA
BN 978-1-58381-842-8
J9 ASTR SOC P
PY 2013
VL 479
BP 167
EP 178
PG 12
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA BE6CA
UT WOS:000373870500023
ER

PT B
AU Nitta, A
   Koester, D
   Chu, D
   Thompson, SE
   Kepler, SO
   Kleinman, SJ
   Winget, DE
   Provencal, JL
   Castanheira, BG
AF Nitta, Atsuko
   Koester, D.
   Chu, D.
   Thompson, Susan E.
   Kepler, S. O.
   Kleinman, S. J.
   Winget, D. E.
   Provencal, J. L.
   Castanheira, B. G.
BE Shibahashi, H
   LynasGray, AE
TI Comparing Two Mode Identification Techniques for a DB White Dwarf
SO PROGRESS IN PHYSICS OF THE SUN AND STARS: A NEW ERA IN HELIO- AND
   ASTEROSEISMOLOGY
SE Astronomical Society of the Pacific Conference Series
LA English
DT Proceedings Paper
CT 3rd International Conference on Helioseismology and Asteroseismology
CY NOV 25-29, 2012
CL Hakone, JAPAN
SP Fujihara Fdn Sci, Global Ctr Excellence Phys Sci Frontier
AB Mode identification is one of the most important steps in the asteroseismological analysis of pulsating stars. For pulsating white dwarf stars, the method using pulsation periods has proven to be quite powerful. But there is another method, using the amplitude of the pulsation modes. The advantage of this method is that it can work on pulsators with small numbers of pulsation modes. Since the majority of white dwarf pulsators show a small number of pulsation modes, they are difficult to analyze using their pulsation periods alone. We have applied the mode identification method using pulsation amplitudes to GD 358, a pulsating white dwarf star previously studied successfully using pulsation periods. Both methods agree.
C1 [Nitta, Atsuko; Kleinman, S. J.] Gemini Observ, 670 N Aohoku Pl, Hilo, HI 96720 USA.
   [Koester, D.] Univ Kiel, Inst Theoret Phys & Astrophys, D-24098 Kiel, Germany.
   [Chu, D.] Dartmouth Coll, Hanover, NH 03755 USA.
   [Thompson, Susan E.] NASA, Ames Res Ctr, SETI Inst, Moffett Field, CA 94035 USA.
   [Kepler, S. O.] Univ Fed Rio Grande do Sul, Inst Fis, Dept Astron, BR-91501970 Porto Alegre, RS, Brazil.
   [Winget, D. E.; Castanheira, B. G.] Univ Texas Austin, Dept Astron, Austin, TX 78712 USA.
   [Winget, D. E.; Castanheira, B. G.] McDonald Observ, Ft Davis, TX 79734 USA.
   [Provencal, J. L.] Univ Delaware, Dept Phys & Astron, Newark, DE 19716 USA.
RP Nitta, A (reprint author), Gemini Observ, 670 N Aohoku Pl, Hilo, HI 96720 USA.
RI Kepler, S. O. /H-5901-2012
OI Kepler, S. O. /0000-0002-7470-5703
NR 5
TC 0
Z9 0
U1 0
U2 0
PU ASTRONOMICAL SOC PACIFIC
PI SAN FRANCISCO
PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 USA
BN 978-1-58381-842-8
J9 ASTR SOC P
PY 2013
VL 479
BP 245
EP 250
PG 6
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA BE6CA
UT WOS:000373870500033
ER

PT B
AU Kitiashvili, IN
   Kosovichev, AG
   Lele, SK
   Mansour, NN
   Wray, AA
AF Kitiashvili, Irina N.
   Kosovichev, Alexander G.
   Lele, Sanjiva K.
   Mansour, Nagi N.
   Wray, Alan A.
BE Shibahashi, H
   LynasGray, AE
TI Turbulent Hydrodynamics and Oscillations of Moderate-Mass Stars
SO PROGRESS IN PHYSICS OF THE SUN AND STARS: A NEW ERA IN HELIO- AND
   ASTEROSEISMOLOGY
SE Astronomical Society of the Pacific Conference Series
LA English
DT Proceedings Paper
CT 3rd International Conference on Helioseismology and Asteroseismology
CY NOV 25-29, 2012
CL Hakone, JAPAN
SP Fujihara Fdn Sci, Global Ctr Excellence Phys Sci Frontier
ID STELLAR EVOLUTION CALCULATIONS; QUIET SUN; EXCITATION; CONVECTION;
   CESAM; CODE
AB The solar-type pulsators are characterized by acoustic oscillation modes excited by turbulent convection in the upper convective boundary layer. As the stellar mass increases the convection zone shrinks, the scale and intensity of the turbulent motions increases, providing more energy for excitation of acoustic modes. When the stellar mass reaches about 1.6 solar masses the upper convection zone consists of two very thin layers corresponding to H and He ionization, and in addition to the acoustic modes the stars show strong internal gravity modes. The thin convection zone is often considered insignificant for the stellar dynamics and variability. We use three-dimensional (3D) numerical radiative hydrodynamics simulations to study convective and oscillation properties of Main Sequence stars from the solar-type stars to more massive stars. We present simulation results for some of the target stars selected for the Kepler Guest Observer project "Transition in Variable Stars: From Solar-Type Stars to Gamma-Doradus Stars". For the moderate-mass (A-type) stars the simulations reveal supersonic granular-type convection of a scale significantly larger than the solar granulation scale, and strong overshooting plumes penetrating into the stable radiative zone, that can affect the oscillation properties of these stars.
C1 [Kitiashvili, Irina N.; Kosovichev, Alexander G.; Lele, Sanjiva K.] Stanford Univ, Stanford, CA 94305 USA.
   [Mansour, Nagi N.; Wray, Alan A.] NASA, Ames Res Ctr, Mountain View, CA 94040 USA.
RP Kitiashvili, IN (reprint author), Stanford Univ, Stanford, CA 94305 USA.
NR 13
TC 0
Z9 0
U1 0
U2 0
PU ASTRONOMICAL SOC PACIFIC
PI SAN FRANCISCO
PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 USA
BN 978-1-58381-842-8
J9 ASTR SOC P
PY 2013
VL 479
BP 377
EP 382
PG 6
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA BE6CA
UT WOS:000373870500047
ER

PT B
AU Nagashima, K
   Gizon, L
   Birch, A
   Loptien, B
   Couvidat, S
   Fleck, B
AF Nagashima, Kaori
   Gizon, Laurent
   Birch, Aaron
   Loeptien, Bjoern
   Couvidat, Sebastien
   Fleck, Bernhard
BE Shibahashi, H
   LynasGray, AE
TI Helioseismic and Magnetic Imager Multi-height Dopplergrams
SO PROGRESS IN PHYSICS OF THE SUN AND STARS: A NEW ERA IN HELIO- AND
   ASTEROSEISMOLOGY
SE Astronomical Society of the Pacific Conference Series
LA English
DT Proceedings Paper
CT 3rd International Conference on Helioseismology and Asteroseismology
CY NOV 25-29, 2012
CL Hakone, JAPAN
SP Fujihara Fdn Sci, Global Ctr Excellence Phys Sci Frontier
ID SOLAR ATMOSPHERE; GRAVITY-WAVES; ENERGY FLUX
AB We study Doppler velocity measurements at multiple heights in the solar atmosphere using a set of six filtergrams, obtained by the Helioseismic Magnetic Imager on board the Solar Dynamics Observatory. There are clear and significant phase differences between core and wing Dopplergrams in the frequency range above the photospheric acoustic cutoff frequency, which indicates that these are really "multi-height" datasets.
C1 [Nagashima, Kaori; Gizon, Laurent; Birch, Aaron] Max Planck Inst Sonnensyst Forsch, D-37191 Katlenburg Lindau, Germany.
   [Gizon, Laurent; Loeptien, Bjoern] Univ Gottingen, Inst Astrophys, D-37077 Gottingen, Germany.
   [Couvidat, Sebastien] Stanford Univ, HEPL, Stanford, CA 94305 USA.
   [Fleck, Bernhard] NASA GSFC, ESA Sci Operat Dept, Greenbelt, MD 20771 USA.
RP Nagashima, K (reprint author), Max Planck Inst Sonnensyst Forsch, D-37191 Katlenburg Lindau, Germany.
NR 13
TC 0
Z9 0
U1 0
U2 0
PU ASTRONOMICAL SOC PACIFIC
PI SAN FRANCISCO
PA 390 ASHTON AVE, SAN FRANCISCO, CA 94112 USA
BN 978-1-58381-842-8
J9 ASTR SOC P
PY 2013
VL 479
BP 429
EP 432
PG 4
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA BE6CA
UT WOS:000373870500053
ER

PT S
AU Ma, C
   MacMillan, D
   Bolotin, S
   Le Bail, K
   Gordon, D
   Gipson, J
AF Ma, C.
   MacMillan, D.
   Bolotin, S.
   Le Bail, K.
   Gordon, D.
   Gipson, J.
BE Altamimi, Z
   Collilieux, X
TI Comparison of Realizations of the Terrestrial Reference Frame
SO REFERENCE FRAMES FOR APPLICATIONS IN GEOSCIENCES
SE International Association of Geodesy Symposia
LA English
DT Proceedings Paper
CT IAG Symposium on Reference Frames for Applications in Geosciences
   (REFAG)
CY OCT 04-08, 2010
CL Ecole Nationale Sci Geographiques, Marne la Vallee, FRANCE
SP Univ Marne Lavallee, IAG
HO Ecole Nationale Sci Geographiques
DE Radio wave technique; Terrestrial reference frame; Space geodesy
AB IGN and DGFI both generated realizations of the terrestrial reference frame under the auspices of the IERS from combination of the same space geodetic data. We compared the IGN and DGFI TRFs with a GSFC CALC/SOLVE TRF. WRMS position and velocity differences for the 40 most frequently observed sites were 2-3 mm and 0.3-0.4 mm/year. There was a scale difference of -0.39/-0.09 ppb between the IGN/DGFI realizations and the GSFC solution. When we fixed positions and velocities to either the IGN or DGFI values in CALC/SOLVE solutions, the resulting EOP estimates were not significantly different from the estimates from a standard TRF solution.
C1 [Ma, C.; MacMillan, D.; Bolotin, S.; Le Bail, K.; Gordon, D.; Gipson, J.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
   [MacMillan, D.; Bolotin, S.; Le Bail, K.; Gordon, D.; Gipson, J.] NVI Inc, Greenbelt, MD 20771 USA.
RP Ma, C (reprint author), NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
EM chopo.ma@nasa.gov
NR 7
TC 0
Z9 0
U1 0
U2 0
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 0939-9585
BN 978-3-642-32998-2
J9 IAG SYMP
PY 2013
VL 138
BP 51
EP 56
DI 10.1007/978-3-642-32998-2_9
PG 6
WC Geochemistry & Geophysics; Geography, Physical; Remote Sensing
SC Geochemistry & Geophysics; Physical Geography; Remote Sensing
GA BD8BE
UT WOS:000363743800009
ER

PT S
AU Gordon, D
   Ma, C
   MacMillan, D
   Bolotin, S
   Le Bail, K
   Gipson, J
AF Gordon, David
   Ma, Chopo
   MacMillan, Dan
   Bolotin, Sergei
   Le Bail, Karine
   Gipson, John
BE Altamimi, Z
   Collilieux, X
TI Effects of ICRF2 on the TRF, CRF, and EOP
SO REFERENCE FRAMES FOR APPLICATIONS IN GEOSCIENCES
SE International Association of Geodesy Symposia
LA English
DT Proceedings Paper
CT IAG Symposium on Reference Frames for Applications in Geosciences
   (REFAG)
CY OCT 04-08, 2010
CL Ecole Nationale Sci Geographiques, Marne la Vallee, FRANCE
SP Univ Marne Lavallee, IAG
HO Ecole Nationale Sci Geographiques
DE ICRF; ICRF2; Terrestrial reference frames; Celestial reference frames;
   Earth orientation parameters
ID CELESTIAL REFERENCE FRAME
AB The ICRF2 became official on Jan 1, 2010. It includes positions of 3414 compact radio astronomical sources observed with VLBI, a fivefold increase over the first ICRF. ICRF2 was aligned with the ICRS using 138 stable sources common to both ICRF2 and ICRF-Ext2. Maintenance of ICRF2 is to be made using 295 defining sources chosen for their historical positional stability, minimal source structure, and sky distribution. The switchover to ICRF2 has had some small effects on the terrestrial reference frame (TRF), celestial reference frame (CRF) and Earth orientation parameter (EOP) solutions from VLBI. A CRF based on ICRF2 shows a relative rotation of similar to 40 mu as with respect to ICRF, mostly about the Y-axis. Small shifts are also seen in the EOP, the largest being similar to 11 mu as in X-pole. Some small but insignificant differences are also seen in the TRF.
C1 [Gordon, David; MacMillan, Dan; Bolotin, Sergei; Le Bail, Karine; Gipson, John] NVI Inc, Greenbelt, MD 20771 USA.
   [Gordon, David; Ma, Chopo; MacMillan, Dan; Bolotin, Sergei; Le Bail, Karine; Gipson, John] NASA GSFC, Greenbelt, MD 20771 USA.
RP Gordon, D (reprint author), NVI Inc, Code 698-2, Greenbelt, MD 20771 USA.
EM David.Gordon-1@nasa.gov
NR 9
TC 1
Z9 1
U1 0
U2 0
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 0939-9585
BN 978-3-642-32998-2
J9 IAG SYMP
PY 2013
VL 138
BP 175
EP 179
DI 10.1007/978-3-642-32998-2_26
PG 5
WC Geochemistry & Geophysics; Geography, Physical; Remote Sensing
SC Geochemistry & Geophysics; Physical Geography; Remote Sensing
GA BD8BE
UT WOS:000363743800026
ER

PT S
AU Jacobs, CS
   Clark, JE
   Garcia-Miro, C
   Heflin, MB
   Horiuchi, S
   Moll, VE
   Skjerve, LJ
   Sovers, OJ
AF Jacobs, C. S.
   Clark, J. E.
   Garcia-Miro, C.
   Heflin, M. B.
   Horiuchi, S.
   Moll, V. E.
   Skjerve, L. J.
   Sovers, O. J.
BE Altamimi, Z
   Collilieux, X
TI The Celestial Reference Frame at X/Ka-band (8.4/32 GHz)
SO REFERENCE FRAMES FOR APPLICATIONS IN GEOSCIENCES
SE International Association of Geodesy Symposia
LA English
DT Proceedings Paper
CT IAG Symposium on Reference Frames for Applications in Geosciences
   (REFAG)
CY OCT 04-08, 2010
CL Ecole Nationale Sci Geographiques, Marne la Vallee, FRANCE
SP Univ Marne Lavallee, IAG
HO Ecole Nationale Sci Geographiques
DE Reference systems; Catalogs; Astrometry; Celestial reference frame;
   ICRF; Interferometry; VLBI; Radio continuum; Ka-band; Galaxies: active
   galactic nuclei; Quasars; Blazars
AB A celestial reference frame at X/Ka-band (8.4/32 GHz) has been constructed using fifty-one 24-h sessions with the Deep Space Network. We report on observations which have detected 436 sources covering the full 24 h of right ascension and declinations down to -45 degrees. Comparison of this X/Ka-band frame to the S/X-band (2.3/8.4 GHz) ICRF2 shows wRMS agreement of 200 micro-arcsec (mas) in alpha cos delta and 290 mu as in delta. There is evidence for zonal errors at the 100 mu as level. Known errors include limited SNR, lack of phase calibration, troposphere mismodelling, and limited southern geometry. The motivations for extending the ICRF to frequencies above 8 GHz are to access more compact source morphology for improved frame stability, to provide calibrators for phase referencing, and to support spacecraft navigation at Ka-band.
C1 [Jacobs, C. S.; Clark, J. E.; Heflin, M. B.; Skjerve, L. J.; Sovers, O. J.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
   [Garcia-Miro, C.; Moll, V. E.] Inst Nacl Tecn Aerosp NASA, Ingn & Serv Aerosp, E-28008 Madrid, Spain.
   [Horiuchi, S.] CSIRO Astron & Space Sci NASA, Tuggeranong, ACT 2901, Australia.
RP Jacobs, CS (reprint author), CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
EM Christopher.S.Jacobs@jpl.nasa.gov
NR 12
TC 0
Z9 0
U1 2
U2 2
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 0939-9585
BN 978-3-642-32998-2
J9 IAG SYMP
PY 2013
VL 138
BP 191
EP 196
DI 10.1007/978-3-642-32998-2_28
PG 6
WC Geochemistry & Geophysics; Geography, Physical; Remote Sensing
SC Geochemistry & Geophysics; Physical Geography; Remote Sensing
GA BD8BE
UT WOS:000363743800028
ER

PT S
AU Heflin, M
   Jacobs, C
   Sovers, O
   Moore, A
   Owen, S
AF Heflin, Michael
   Jacobs, Chris
   Sovers, Ojars
   Moore, Angelyn
   Owen, Sue
BE Altamimi, Z
   Collilieux, X
TI Use of Reference Frames for Interplanetary Navigation at JPL
SO REFERENCE FRAMES FOR APPLICATIONS IN GEOSCIENCES
SE International Association of Geodesy Symposia
LA English
DT Proceedings Paper
CT IAG Symposium on Reference Frames for Applications in Geosciences
   (REFAG)
CY OCT 04-08, 2010
CL Ecole Nationale Sci Geographiques, Marne la Vallee, FRANCE
SP Univ Marne Lavallee, IAG
HO Ecole Nationale Sci Geographiques
DE Reference frames; Navigation; VLBI; GPS; ITRF; ICRF
AB Navigation of interplanetary spacecraft is typically based on range, Doppler, and differential interferometric measurements made by ground-based telescopes. Successful tracking requires knowledge of the telescope positions in the terrestrial reference frame. Spacecraft move against a background of extra-galactic radio sources and navigation depends upon precise knowledge of those background radio source positions in the celestial reference frame. Work is underway at JPL to reprocess historical VLBI and GPS data to improve realizations of the terrestrial and celestial frames. The purpose of this brief paper is to provide a snapshot of reference frame results.
C1 [Heflin, Michael; Jacobs, Chris; Sovers, Ojars; Moore, Angelyn; Owen, Sue] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
RP Heflin, M (reprint author), CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
NR 6
TC 0
Z9 0
U1 0
U2 0
PU SPRINGER-VERLAG BERLIN
PI BERLIN
PA HEIDELBERGER PLATZ 3, D-14197 BERLIN, GERMANY
SN 0939-9585
BN 978-3-642-32998-2
J9 IAG SYMP
PY 2013
VL 138
BP 267
EP 269
DI 10.1007/978-3-642-32998-2_38
PG 3
WC Geochemistry & Geophysics; Geography, Physical; Remote Sensing
SC Geochemistry & Geophysics; Physical Geography; Remote Sensing
GA BD8BE
UT WOS:000363743800038
ER

PT S
AU McGranaghan, RM
   Leonard, JM
   Fujimoto, K
   Parker, JS
   Anderson, RL
   Born, GH
AF McGranaghan, Ryan M.
   Leonard, Jason M.
   Fujimoto, Kohei
   Parker, Jeffrey S.
   Anderson, Rodney L.
   Born, George H.
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI INTERPLANETARY DEPARTURE STAGE NAVIGATION BY MEANS OF LIAISON ORBIT
   DETERMINATION ARCHITECTURE
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
AB Autonomous orbit determination for departure stages of interplanetary trajectories is conducted by means of realistic radiometric observations between the departing spacecraft and a satellite orbiting the first lunar libration point. Linked Autonomous Interplanetary Satellite Orbit Navigation (LiAISON) is used to estimate the orbit solution. This paper uses high-fidelity simulations to explore the utilization of LiAISON in providing improved accuracy for interplanetary departure missions. The use of autonomous navigation to supplement current techniques for interplanetary spacecraft is assessed using comparisons with ground based navigation. Results from simulations including the Mars Science Laboratory, Mars Exploration Rover, and Cassini are presented. It is shown that observations from a dedicated LiAISON navigation satellite could be used to supplement ground-based measurements and significantly improve tracking performance.
C1 [McGranaghan, Ryan M.; Leonard, Jason M.; Fujimoto, Kohei] Univ Colorado, Boulder, CO 80309 USA.
   [Parker, Jeffrey S.; Born, George H.] Univ Colorado, Colorado Ctr Astrodynam Res, Boulder, CO 80309 USA.
   [Anderson, Rodney L.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
RP McGranaghan, RM (reprint author), Univ Colorado, Boulder, CO 80309 USA.
OI Anderson, Rodney/0000-0001-5336-2775
NR 27
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 97
EP 116
PN I-IV
PG 20
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700006
ER

PT S
AU Woolley, RC
   Whetsel, CW
AF Woolley, Ryan C.
   Whetsel, Charles W.
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI ON THE NATURE OF EARTH-MARS PORKCHOP PLOTS
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
AB Porkchop plots are a quick and convenient tool to help mission designers plan ballistic trajectories between two bodies. Parameter contours give rise to the familiar "porkchop" shape. Each synodic period the pattern repeats, but not exactly, primarily due to differences in inclination and non-zero eccentricity. In this paper we examine the morphological features of Earth-to-Mars porkchop plots and the orbital characteristics that create them. These results are compared to idealistic and optimized transfers. Conclusions are drawn about "good" opportunities versus "bad" opportunities for different mission applications.
C1 [Woolley, Ryan C.] CALTECH, Jet Prop Lab, Pre Projects Syst Engn Grp, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
   [Whetsel, Charles W.] Jet Prop Lab, Mars Adv Studies & Program Architecture Off, Pasadena, CA 91109 USA.
RP Woolley, RC (reprint author), CALTECH, Jet Prop Lab, Pre Projects Syst Engn Grp, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
NR 6
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 413
EP 426
PN I-IV
PG 14
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700024
ER

PT S
AU Martin-Mur, TJ
   Kruizinga, G
   Wong, M
AF Martin-Mur, Tomas J.
   Kruizinga, Gerhard
   Wong, Mau
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI MARS SCIENCE LABORATORY INTERPLANETARY NAVIGATION PERFORMANCE
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
AB The Mars Science Laboratory spacecraft, carrying the Curiosity rover to Mars, hit the top of the Martian atmosphere just 200 meters from where it had been predicted more than six days earlier, and 2.6 million kilometers away. This unexpected level of accuracy was achieved by a combination of factors including: spacecraft performance, tracking data processing, dynamical modeling choices, and navigation filter setup. This paper will describe our best understanding of what were the factors that contributed to this excellent interplanetary trajectory prediction performance. The accurate interplanetary navigation contributed to the very precise landing performance, and to the overall success of the mission.
C1 [Martin-Mur, Tomas J.; Kruizinga, Gerhard; Wong, Mau] CALTECH, Jet Prop Lab, Mission Design & Nav Sect, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
RP Martin-Mur, TJ (reprint author), CALTECH, Jet Prop Lab, Mission Design & Nav Sect, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
NR 9
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 473
EP 485
PN I-IV
PG 13
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700028
ER

PT S
AU Abilleira, F
AF Abilleira, Fernando
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI 2011 MARS SCIENCE LABORATORY TRAJECTORY RECONSTRUCTION AND PERFORMANCE
   FROM LAUNCH THROUGH LANDING
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
AB The Mars Science Laboratory (MSL) mission successfully launched on an Atlas V 541 Expendable Evolved Launch Vehicle (EELV) from the Eastern Test Range (ETR) at Cape Canaveral Air Force Station (CCAFS) in Florida at 15:02:00 UTC on November 26th, 2011. At 15:52:06 UTC, six minutes after the MSL spacecraft separated from the Centaur upper stage, the spacecraft transmitter was turned on and in less than 20 s spacecraft carrier lock was achieved at the Universal Space Network (USN) Dongara tracking station located in Western Australia. MSL, carrying the most sophisticated rover ever sent to Mars, entered the Martian atmosphere at 05:10:46 SpaceCraft Event Time (SCET) UTC, and landed inside Gale Crater at 05:17:57 SCET UTC on August 6th, 2012. Confirmation of nominal landing was received at the Deep Space Network (DSN) Canberra tracking station via the Mars Odyssey relay spacecraft at 05:31:45 Earth Received Time (ERT) UTC. This paper summarizes in detail the actual vs. predicted trajectory performance in terms of launch vehicle events, launch vehicle injection performance, actual DSN/USN spacecraft lockup, trajectory correction maneuver performance, Entry, Descent, and Landing events, and overall trajectory and geometry characteristics.
C1 [Abilleira, Fernando] CALTECH, Jet Prop Lab, Inner Planets Mission Anal Grp, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
RP Abilleira, F (reprint author), CALTECH, Jet Prop Lab, Inner Planets Mission Anal Grp, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
EM Fernando.Abilleira@jpl.nasa.gov
NR 13
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 487
EP 503
PN I-IV
PG 17
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700029
ER

PT S
AU Brugarolas, PB
   San Martin, AM
   Wong, EC
AF Brugarolas, Paul B.
   San Martin, A. Miguel
   Wong, Edward C.
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI THE ENTRY CONTROLLER FOR THE MARS SCIENCE LABORATORY
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
ID DESIGN
AB The Mars Science Laboratory (MSL) Entry Descent and Landing (EDL) system delivered a rover named Curiosity to Gale crater (Mars) on August 5th, 2012. MSL EDL used an entry Guidance Navigation and Control (GNC) system to achieve its landing target objectives. The entry guidance law guided the vehicle by modulating the lift vector through bank commands. The navigation filter integrated Descent Inertial Measurement Unit (DIMU) measurements to estimate position and attitude. The entry controller commanded the propulsive Reaction Control System (RCS) to achieve 3-axis attitude control during the exoatmospheric phase and bank angle tracking and angle-of-attack and sideslip rate damping during the atmospheric entry phase. This paper describes the design and the as-flown performance of the entry controller.
C1 [Brugarolas, Paul B.; San Martin, A. Miguel; Wong, Edward C.] CALTECH, JPL, Guidance & Control Sect, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
RP Brugarolas, PB (reprint author), CALTECH, JPL, Guidance & Control Sect, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
NR 9
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 505
EP 519
PN I-IV
PG 15
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700030
ER

PT S
AU Steltzner, AD
   San Martin, AM
   Rivellini, TP
   Chen, A
AF Steltzner, Adam D.
   San Martin, A. Miguel
   Rivellini, Tommaso P.
   Chen, Allen
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI MARS SCIENCE LABORATORY ENTRY, DESCENT, AND LANDING SYSTEM OVERVIEW AND
   PRELIMINARY FLIGHT PERFORMANCE RESULTS
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
AB The Mars Science Laboratory project recently placed the Curiosity rover safely on the surface of Mars. With the success of the landing system, the performance envelope of entry, descent, and landing (EDL) capabilities has been extended over the previous state of the art. This paper will present an overview of the MSL entry, descent and landing system design and preliminary flight performance results.
C1 [Steltzner, Adam D.; Chen, Allen] CALTECH, Jet Prop Lab, Syst Engn Div, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
   [San Martin, A. Miguel] CALTECH, Jet Prop Lab, Autonomous Syst Div, Pasadena, CA 91109 USA.
   [Rivellini, Tommaso P.] CALTECH, Jet Prop Lab, Mech Syst Div, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
RP Steltzner, AD (reprint author), CALTECH, Jet Prop Lab, Syst Engn Div, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
NR 8
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 521
EP 528
PN I-IV
PG 8
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700031
ER

PT S
AU San Martin, AM
   Lee, SW
   Wong, EC
AF San Martin, A. Miguel
   Lee, Steven W.
   Wong, Edward C.
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI THE DEVELOPMENT OF THE MSL GUIDANCE, NAVIGATION, AND CONTROL SYSTEM FOR
   ENTRY, DESCENT, AND LANDING
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
AB On August 5, 2012, the Mars Science Laboratory (MSL) mission successfully delivered the Curiosity rover to its intended target in Gale Crater. It was the most complex and ambitious landing in the history of the red planet. A key component of the landing system, the requirements for which were driven by the mission ambitious science goals, was the Guidance, Navigation, and Control (GN&C) system. This paper will describe the technical challenges of the MSL GN&C system, the resulting architecture and design needed to meet those challenges, and the development process used for its implementation and testing.
C1 [San Martin, A. Miguel; Lee, Steven W.; Wong, Edward C.] CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
RP San Martin, AM (reprint author), CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
NR 13
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 529
EP 546
PN I-IV
PG 18
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700032
ER

PT S
AU Mendeck, GF
   McGrew, LC
AF Mendeck, Gavin F.
   McGrew, Lynn Craig
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI POST-FLIGHT EDL ENTRY GUIDANCE PERFORMANCE OF THE 2011 MARS SCIENCE
   LABORATORY MISSION
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
AB The 2011 Mars Science Laboratory was the first Mars guided entry which safely delivered the rover to a landing within a touchdown ellipse of 19.1 km x 6.9 km. The Entry Terminal Point Controller guidance algorithm is derived from the final phase Apollo Command Module guidance and, like Apollo, modulates the bank angle to control the range flown. The guided entry performed as designed without any significant exceptions. The Curiosity rover was delivered about 2.2 km from the expected touchdown. This miss distance is attributed to little time to correct the downrange drift from the final bank reversal and a suspected tailwind during heading alignment. The successful guided entry for the Mars Science Laboratory lays the foundation for future Mars missions to improve upon.
C1 [Mendeck, Gavin F.; McGrew, Lynn Craig] NASA, Flight Dynam Div, Lyndon B Johnson Space Ctr, Houston, TX 77058 USA.
RP Mendeck, GF (reprint author), NASA, Flight Dynam Div, Lyndon B Johnson Space Ctr, Houston, TX 77058 USA.
NR 6
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 547
EP 562
PN I-IV
PG 16
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700033
ER

PT S
AU Way, DW
   Davis, JL
   Shidner, JD
AF Way, David W.
   Davis, Jody L.
   Shidner, Jeremy D.
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI ASSESSMENT OF THE MARS SCIENCE LABORATORY ENTRY, DESCENT, AND LANDING
   SIMULATION
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
AB On August 5, 2012, the Mars Science Laboratory rover, Curiosity, successfully landed inside Gale Crater. This landing was the seventh successful landing and fourth rover to be delivered to Mars. Weighing nearly one metric ton, Curiosity is the largest and most complex rover ever sent to investigate another planet. Safely landing such a large payload required an innovative Entry, Descent, and Landing system, which included the first guided entry at Mars, the largest supersonic parachute ever flown at Mars, and a novel Sky Crane landing system. A complete, end-to-end, six degree-of-freedom, multi-body computer simulation of the Mars Science Laboratory Entry, Descent, and Landing sequence was developed at the NASA Langley Research Center. In-flight data gathered during the successful landing is compared to pre-flight statistical distributions, predicted by the simulation. These comparisons provide insight into both the accuracy of the simulation and the overall performance of the vehicle.
C1 [Way, David W.; Davis, Jody L.] NASA, Langley Res Ctr, MS 489, Hampton, VA 23681 USA.
   [Shidner, Jeremy D.] Analyt Mech Assoc Inc, Hampton, VA 23666 USA.
RP Way, DW (reprint author), NASA, Langley Res Ctr, MS 489, Hampton, VA 23681 USA.
NR 20
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 563
EP 581
PN I-IV
PG 19
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700034
ER

PT S
AU Arora, N
   Strange, N
AF Arora, Nitin
   Strange, Nathan
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI A LOW ENERGY, LOW THRUST UNIFIED SOLVER FOR RAPID MISSION DESIGN
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
ID ORBITS; MOON
AB Recent studies of a manned cislunar way point base at the moon are driving the need to rapidly compute low-energy, low thrust (le-lt) trajectories to Earth Moon L1/L2 Lagrange points. Existing methods are hard to setup and suffer from large compute times. We propose LOTUS a robust, near-optimal solver, capable of rapidly computing near optimal le-lt trajectories. The algorithm takes advantage of a low thrust feedback control law (Q-Law) along with a novel, heuristic based le-lt patch point selection strategy implemented via a backward solution methodology. LOTUS is applied to a solar electric propulsion powered, Earth-Moon L2 transfer design problem. On the order of 700, near optimal le-lt transfers solutions are computed in similar to 3.5 hrs.
C1 [Arora, Nitin] Georgia Inst Technol, Daniel Guggenheim Sch Aerosp Engn, Atlanta, GA 30332 USA.
   [Strange, Nathan] CALTECH, Jet Prop Lab, Pasadena, CA 91125 USA.
RP Arora, N (reprint author), Georgia Inst Technol, Daniel Guggenheim Sch Aerosp Engn, Atlanta, GA 30332 USA.
EM n.arora@gatech.edu
NR 24
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 751
EP 764
PN I-IV
PG 14
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700045
ER

PT S
AU Broschart, SB
   Lantoine, G
   Grebow, DJ
AF Broschart, Stephen B.
   Lantoine, Gregory
   Grebow, Daniel J.
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI CHARACTERISTICS OF QUASI-TERMINATOR ORBITS NEAR PRIMITIVE BODIES
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
ID COMET 67P/CHURYUMOV-GERASIMENKO; SATELLITE DYNAMICS; RADIATION PRESSURE;
   ASTEROIDS; MISSION; NUCLEUS
AB Quasi-terminator orbits are introduced as a class of quasi-periodic trajectories in the solar radiation pressure (SRP) perturbed Hill dynamics. These orbits offer significant displacements along the Sun-direction without the need for station-keeping maneuvers. Thus, quasi-terminator orbits have application to primitive-body mapping missions, where a variety of observation geometries relative to the Sun (or other directions) can be achieved. This paper describes the characteristics of these orbits as a function of normalized SRP strength and invariant torus frequency ratio and presents a discussion of mission design considerations for a global surface mapping orbit design.
C1 [Broschart, Stephen B.; Lantoine, Gregory; Grebow, Daniel J.] CALTECH, Mission Design & Nav Sect, Jet Prop Lab, M-S 301-121,4800 Oak Grove Dr, Pasadena, CA 91109 USA.
RP Broschart, SB (reprint author), CALTECH, Mission Design & Nav Sect, Jet Prop Lab, M-S 301-121,4800 Oak Grove Dr, Pasadena, CA 91109 USA.
NR 23
TC 2
Z9 2
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 953
EP 968
PN I-IV
PG 16
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700056
ER

PT S
AU Stuart, J
   Howell, K
   Wilson, R
AF Stuart, Jeffrey
   Howell, Kathleen
   Wilson, Roby
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI AUTOMATED DESIGN OF PROPELLANT-OPTIMAL, END-TO-END, LOW-THRUST
   TRAJECTORIES FOR TROJAN ASTEROID TOURS
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
ID OPTIMIZATION; ORBITS
AB The Sun-Jupiter Trojan asteroids are celestial bodies of great scientific interest as well as potential resources offering mineral resources for long-term human exploration of the solar system. Previous investigations under this project have addressed the automated design of tours within the asteroid swarm. The current automation scheme is now expanded by incorporating options for a complete trajectory design approach from Earth departure through a tour of the Trojan asteroids. Computational aspects of the design procedure are automated such that end-to-end trajectories are generated with a minimum of human interaction after key elements associated with a proposed mission concept are specified.
C1 [Stuart, Jeffrey] Purdue Univ, Sch Aeronaut & Astronaut, 701 W Stadium Ave, W Lafayette, IN 47906 USA.
   [Howell, Kathleen] Purdue Univ, Sch Aeronaut & Astronaut, Aeronaut & Astronaut Engn, W Lafayette, IN 47906 USA.
   [Wilson, Roby] CALTECH, Jet Prop Lab, Mission Design & Nav Sect, Inner Planet Missions Anal Grp, Pasadena, CA 91109 USA.
RP Stuart, J (reprint author), Purdue Univ, Sch Aeronaut & Astronaut, 701 W Stadium Ave, W Lafayette, IN 47906 USA.
EM jrstuart@purdue.edu; howell@purdue.edu; roby.s.wilson@jpl.nasa.gov
NR 15
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 989
EP 1005
PN I-IV
PG 17
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700058
ER

PT S
AU Goodson, TD
AF Goodson, Troy D.
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI EXECUTION-ERROR MODELING AND ANALYSIS OF THE GRAIL SPACECRAFT PAIR
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
AB The GRAIL spacecraft, Ebb and Flow (aka GRAIL-A and GRAIL-B), completed their prime mission in June and extended mission in December 2012. The excellent performance of the propulsion and attitude control subsystems contributed significantly to the mission's success. In order to better understand this performance, the Navigation Team has analyzed and refined the execution-error models for Delta V maneuvers. There were enough maneuvers in the prime mission to form the basis of a model update that was used in the extended mission. This paper documents the evolution of the execution-error models along with the analysis and software used.
C1 [Goodson, Troy D.] CALTECH, Jet Prop Lab, Sect 343,Mail Stop 264-282,4800 Oak Grove Dr, Pasadena, CA 91109 USA.
RP Goodson, TD (reprint author), CALTECH, Jet Prop Lab, Sect 343,Mail Stop 264-282,4800 Oak Grove Dr, Pasadena, CA 91109 USA.
NR 10
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 1025
EP 1042
PN I-IV
PG 18
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700060
ER

PT S
AU Ryne, M
   Antreasian, P
   Broschart, S
   Criddle, K
   Gustafson, E
   Jefferson, D
   Lau, E
   Went, HY
   You, TH
AF Ryne, Mark
   Antreasian, Peter
   Broschart, Stephen
   Criddle, Kevin
   Gustafson, Eric
   Jefferson, David
   Lau, Eunice
   Went, Hui Ying
   You, Tung-Han
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI GRAIL ORBIT DETERMINATION FOR THE SCIENCE PHASE AND EXTENDED MISSION
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
AB The Gravity Recovery and Interior Laboratory Mission (GRAIL) is the 11th mission of the NASA Discovery Program. Its objective is to help answer fundamental questions about the Moon's internal structure, thermal evolution, and collisional history. GRAIL employs twin spacecraft, which fly in formation in low altitude polar orbits around the Moon. An improved global lunar gravity field is derived from high-precision range-rate measurements of the distance between the two spacecraft. The purpose of this paper is to describe the strategies used by the GRAIL Orbit Determination Team to overcome challenges posed during on-orbit operations.
C1 [Ryne, Mark; Antreasian, Peter; Broschart, Stephen; Criddle, Kevin; Gustafson, Eric; Jefferson, David; Lau, Eunice; Went, Hui Ying; You, Tung-Han] CALTECH, Jet Prop Lab, Miss Design & Nav Sect, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
RP Ryne, M (reprint author), CALTECH, Jet Prop Lab, Miss Design & Nav Sect, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
NR 6
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 1043
EP 1061
PN I-IV
PG 19
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700061
ER

PT S
AU Kruizinga, G
   Asmar, S
   Fahnestock, E
   Harvey, N
   Kahan, D
   Konopliv, A
   Oudrhiri, K
   Paik, M
   Park, R
   Strekalov, D
   Watkins, M
   Yuan, DN
AF Kruizinga, Gerhard
   Asmar, Sami
   Fahnestock, Eugene
   Harvey, Nate
   Kahan, Daniel
   Konopliv, Alex
   Oudrhiri, Kamal
   Paik, Meegyeong
   Park, Ryan
   Strekalov, Dmitry
   Watkins, Michael
   Yuan, Dah-Ning
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI THE ROLE OF GRAIL ORBIT DETERMINATION IN PREPROCESSING OF GRAVITY
   SCIENCE MEASUREMENTS
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
ID MISSION
AB The Gravity Recovery And Interior Laboratory (GRAIL) mission has constructed a lunar gravity field with unprecedented uniform accuracy on the farside and nearside of the Moon. GRAIL lunar gravity field determination begins with preprocessing of the gravity science measurements by applying corrections for time tag error, general relativity, measurement noise and biases. Determining these corrections requires the generation of spacecraft ephemerides of an accuracy not attainable with the pre-GRAIL lunar gravity fields. Therefore, a bootstrapping strategy was developed, iterating between science data preprocessing and lunar gravity field estimation in order to construct sufficiently accurate orbit ephemerides. This paper describes the GRAIL measurements, their dependence on the spacecraft ephemerides and the role of orbit determination in the bootstrapping strategy. Simulation results will be presented that validate the bootstrapping strategy followed by bootstrapping results for flight data, which have led to the latest GRAIL lunar gravity fields.
C1 [Kruizinga, Gerhard; Asmar, Sami; Fahnestock, Eugene; Harvey, Nate; Kahan, Daniel; Konopliv, Alex; Oudrhiri, Kamal; Paik, Meegyeong; Park, Ryan; Strekalov, Dmitry; Watkins, Michael; Yuan, Dah-Ning] CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
RP Kruizinga, G (reprint author), CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
NR 12
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 1063
EP 1078
PN I-IV
PG 16
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700062
ER

PT S
AU Fahnestock, E
   Asmar, S
   Kahan, D
   Konopliv, A
   Kruizinga, G
   Oudrhiri, K
   Paik, M
   Park, R
   Strekalov, D
   Yuan, DN
AF Fahnestock, Eugene
   Asmar, Sami
   Kahan, Daniel
   Konopliv, Alex
   Kruizinga, Gerhard
   Oudrhiri, Kamal
   Paik, Meegyeong
   Park, Ryan
   Strekalov, Dmitry
   Yuan, Dah-Ning
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI GRAIL SCIENCE DATA SYSTEM ORBIT DETERMINATION: APPROACH, STRATEGY, AND
   PERFORMANCE
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
AB This paper details orbit determination techniques and strategies employed within each stage of the larger iterative process (ref. Kruizinga et al., this meeting) of preprocessing raw GRAIL data into the gravity science measurements used within gravity field solutions. Each orbit determination pass used different data, corrections to them, and/or estimation parameters. We compare performance metrics among these passes. For example, for the primary mission, the magnitude of residuals using our orbits progressed from approximate to 19.4 to approximate to 0.077 mu m/s for inter-satellite range rate data and from approximate to 0.4 to approximate to 0.1 mm/s for Doppler data.
C1 [Fahnestock, Eugene; Asmar, Sami; Kahan, Daniel; Konopliv, Alex; Kruizinga, Gerhard; Oudrhiri, Kamal; Paik, Meegyeong; Park, Ryan; Strekalov, Dmitry; Yuan, Dah-Ning] CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
RP Fahnestock, E (reprint author), CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
NR 15
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 1079
EP 1098
PN I-IV
PG 20
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700063
ER

PT S
AU Park, RS
   Konopliv, AS
   Yuan, DN
   Asmar, SW
   Fahnestock, EG
   Kruizinga, GL
   Paik, M
   Watkins, MM
   Smith, DE
   Zuber, MT
AF Park, R. S.
   Konopliv, A. S.
   Yuan, D. -N.
   Asmar, S. W.
   Fahnestock, E. G.
   Kruizinga, G. L.
   Paik, M.
   Watkins, M. M.
   Smith, D. E.
   Zuber, M. T.
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI HIGH-RESOLUTION LUNAR GRAVITY FROM THE GRAVITY RECOVERY AND INTERIOR
   LABORATORY MISSION
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
AB This paper discusses an initial gravity science results from the Gravity Recovery And Interior Laboratory (GRAIL) mission. The inter-satellite and ground-based Doppler measurements during the three-month prime science phase were processed and a 420th degree and order spherical harmonics lunar gravity field, called GL0420A, was computed. The root-mean-square of measurement residuals were 0.1 mm/s for the ground-based Doppler data (10-s count time) and 0.05 micron/s for the inter-satellite data (5-s count time), respectively. The ground-based Doppler data was fitted to the expected noise level whereas the inter-satellite data has not reached the expected noise floor of 0.03 microns/s, indicating that there exists higher order gravity signal (n>420). Overall, the result shows that the lunar gravity field has improved by 3-5 orders of magnitude over knowledge from pre-GRAIL gravity field.
C1 [Park, R. S.; Konopliv, A. S.; Yuan, D. -N.; Fahnestock, E. G.] CALTECH, Jet Prop Lab, Outer Planet Nav Grp, 4800 Oak Grove Dr, Pasadena, CA 91125 USA.
   [Asmar, S. W.; Paik, M.] CALTECH, Jet Prop Lab, Radio Sci Syst Grp, Pasadena, CA 91125 USA.
   [Kruizinga, G. L.] CALTECH, Jet Prop Lab, Inner Planet Nav Grp, Pasadena, CA 91125 USA.
   [Watkins, M. M.] CALTECH, Jet Prop Lab, Div Sci, Pasadena, CA 91125 USA.
   [Smith, D. E.; Zuber, M. T.] MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA 02139 USA.
RP Park, RS (reprint author), CALTECH, Jet Prop Lab, Outer Planet Nav Grp, 4800 Oak Grove Dr, Pasadena, CA 91125 USA.
NR 15
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 1099
EP 1110
PN I-IV
PG 12
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700064
ER

PT S
AU Lemoine, FG
   Goossens, SJ
   Sabaka, TJ
   Nicholas, JB
   Mazarico, E
   Rowlands, DD
   Loomis, BD
   Chinn, DS
   Caprette, D
   Neumann, GA
   Smith, DE
   Zuber, MT
AF Lemoine, F. G.
   Goossens, S. J.
   Sabaka, T. J.
   Nicholas, J. B.
   Mazarico, E.
   Rowlands, D. D.
   Loomis, B. D.
   Chinn, D. S.
   Caprette, D.
   Neumann, G. A.
   Smith, D. E.
   Zuber, M. T.
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI MODELING AND PRECISE ORBIT DETERMINATION IN SUPPORT OF GRAVITY MODEL
   DEVELOPMENT FOR THE GRAIL MISSION
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
AB New and improved models of the lunar gravity field to 420x420 in spherical harmonics have been derived from the analysis of the Gravity Recovery And Interior Laboratory (GRAIL) intersatellite Ka-band tracking data. We discuss the measurement and force modeling applied to the analysis of the GRAIL data from the primary mission (March 1 to May 29, 2012), and the strategies chosen to develop the high degree solutions. We summarize the quality of the gravity models developed and their impact on GRAIL precision orbit determination.
C1 [Lemoine, F. G.; Sabaka, T. J.; Rowlands, D. D.; Neumann, G. A.] NASA, Goddard Space Flight Ctr, Planetary Geodynam Lab, Code 698, Greenbelt, MD 20771 USA.
   [Goossens, S. J.] Univ Maryland Baltimore Cty, CRESST, Baltimore, MD 21250 USA.
   [Nicholas, J. B.] Emergent Space Technol, Greenbelt, MD 20770 USA.
   [Mazarico, E.; Smith, D. E.; Zuber, M. T.] MIT, Cambridge, MA 02139 USA.
   [Loomis, B. D.; Chinn, D. S.; Caprette, D.] Stinger Ghaffarian Technol, Greenbelt, MD 20770 USA.
RP Lemoine, FG (reprint author), NASA, Goddard Space Flight Ctr, Planetary Geodynam Lab, Code 698, Greenbelt, MD 20771 USA.
NR 34
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 1111
EP 1123
PN I-IV
PG 13
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700065
ER

PT S
AU Mazarico, E
   Lemoine, FG
   Goossens, SJ
   Sabaka, TJ
   Nicholas, JB
   Rowlands, DD
   Neumann, GA
   Torrence, MH
   Smith, DE
   Zuber, MT
AF Mazarico, Erwan
   Lemoine, Frank G.
   Goossens, Sander J.
   Sabaka, Terence J.
   Nicholas, Joseph B.
   Rowlands, David D.
   Neumann, Gregory A.
   Torrence, Mark H.
   Smith, David E.
   Zuber, Maria T.
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI IMPROVED PRECISION ORBIT DETERMINATION OF LUNAR ORBITERS FROM THE
   GRAIL-DERIVED LUNAR GRAVITY MODELS
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
ID MARS GLOBAL SURVEYOR; RECONNAISSANCE ORBITER; FIELD; MISSION; MOON
AB High-resolution global gravity field models of the Moon were obtained from precise Ka-band range-rate measurements between the twin Gravity Recovery And Interior Laboratory (GRAIL) spacecraft. We assess the geodetic improvements in tracking data fit and orbit reconstruction quality for independent lunar orbiters, with the latest degree and order 660 spherical harmonics gravity field model developed at NASA GSFC from the primary mission data. We focus on the Lunar Reconnaissance Orbiter (LRO), but also discuss results for Lunar Prospector and the Japanese SELENE mission. In the case of LRO, in addition to radiometric tracking, we use altimetric data from the Lunar Orbiter Laser Altimeter (LOLA) to provide independent estimates of the position reconstruction accuracy.
C1 [Mazarico, Erwan; Smith, David E.] MIT, Dept Earth Atmospher & Planetary Sci, 77 Massachusetts Ave, Cambridge, MA 02139 USA.
   [Lemoine, Frank G.; Sabaka, Terence J.; Rowlands, David D.; Neumann, Gregory A.] NASA, Goddard Space Flight Ctr, Planetary Geodynam Lab, 8800 Greenbelt Rd, Greenbelt, MD 20771 USA.
   [Goossens, Sander J.] Univ Maryland Baltimore Cty, Ctr Res & Explorat Space Sci & Technol, 1000 Hilltop Circle, Baltimore, MD 21250 USA.
   [Nicholas, Joseph B.] Emergent Space Technol, 6411 Ivy Lane, Greenbelt, MD 20770 USA.
   [Torrence, Mark H.] Singer Ghaffarian Technol, 7701 Greenbelt Rd, Greenbelt, MD 20770 USA.
   [Zuber, Maria T.] MIT, Dept Earth Atmospher & Planetary Sci, Geophys, 77 Massachusetts Ave, Cambridge, MA 02139 USA.
RP Mazarico, E (reprint author), MIT, Dept Earth Atmospher & Planetary Sci, 77 Massachusetts Ave, Cambridge, MA 02139 USA.
NR 29
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 1125
EP 1141
PN I-IV
PG 17
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700066
ER

PT S
AU Gustafson, ED
   Kruizinga, GL
   Martin-Mur, TJ
AF Gustafson, Eric D.
   Kruizinga, Gerhard L.
   Martin-Mur, Tomas J.
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI MARS SCIENCE LABORATORY ORBIT DETERMINATION DATA PRE-PROCESSING
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
AB The Mars Science Laboratory (MSL) was spin-stabilized during its cruise to Mars. We discuss the effects of spin on the radiometric data and how the orbit determination team dealt with them. Additionally, we will discuss the unplanned benefits of detailed spin modeling including attitude estimation and spacecraft clock correlation.
C1 [Gustafson, Eric D.; Kruizinga, Gerhard L.; Martin-Mur, Tomas J.] CALTECH, Jet Prop Lab, Mission Design & Nav Sect, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
RP Gustafson, ED (reprint author), CALTECH, Jet Prop Lab, Mission Design & Nav Sect, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
NR 10
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 1145
EP 1158
PN I-IV
PG 14
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700067
ER

PT S
AU Thompson, PF
   Gustafson, ED
   Kruizinga, GL
   Martin-Mur, TJ
AF Thompson, Paul F.
   Gustafson, Eric D.
   Kruizinga, Gerhard L.
   Martin-Mur, Tomas J.
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI FILTER STRATEGIES FOR MARS SCIENCE LABORATORY ORBIT DETERMINATION
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
AB The Mars Science Laboratory (MSL) spacecraft had ambitious navigation delivery and knowledge accuracy requirements for landing inside Gale Crater. Confidence in the orbit determination (OD) solutions was increased by investigating numerous filter strategies for solving the orbit determination problem. We will discuss the strategy for the different types of variations: for example, data types, data weights, solar pressure model covariance, and estimating versus considering model parameters. This process generated a set of plausible OD solutions that were compared to the baseline OD strategy. Even implausible or unrealistic results were helpful in isolating sensitivities in the OD solutions to certain model parameterizations or data types.
C1 [Thompson, Paul F.; Gustafson, Eric D.; Kruizinga, Gerhard L.; Martin-Mur, Tomas J.] CALTECH, Jet Prop Lab, Mission Design & Nav Sect, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
RP Thompson, PF (reprint author), CALTECH, Jet Prop Lab, Mission Design & Nav Sect, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
NR 11
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 1159
EP 1176
PN I-IV
PG 18
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700068
ER

PT S
AU Gustafson, ED
   Arrieta-Camacho, JJ
   Petropoulos, AE
AF Gustafson, Eric D.
   Arrieta-Camacho, Juan J.
   Petropoulos, Anastassios E.
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI ORBIT CLUSTERING BASED ON TRANSFER COST
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
ID ALGORITHM
AB We propose using cluster analysis to perform quick screening for combinatorial global optimization problems. The key missing component currently preventing cluster analysis from use in this context is the lack of a useable metric function that defines the cost to transfer between two orbits. We study several proposed metrics and clustering algorithms, including k-means and the expectation maximization algorithm. We also show that proven heuristic methods such as the Q-law can be modified to work with cluster analysis.
C1 [Gustafson, Eric D.; Arrieta-Camacho, Juan J.; Petropoulos, Anastassios E.] CALTECH, Jet Prop Lab, Mission Design & Nav Sect, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
RP Gustafson, ED (reprint author), CALTECH, Jet Prop Lab, Mission Design & Nav Sect, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
NR 8
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 1395
EP 1411
PN I-IV
PG 17
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700082
ER

PT S
AU Schoenenberger, M
   Van Norman, J
   Dyakonov, A
   Karlgaard, C
   Way, D
   Kutty, P
AF Schoenenberger, Mark
   Van Norman, John
   Dyakonov, Artem
   Karlgaard, Chris
   Way, David
   Kutty, Prasad
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI ASSESSMENT OF THE RECONSTRUCTED AERODYNAMICS OF THE MARS SCIENCE
   LABORATORY ENTRY VEHICLE
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
AB On August 5, 2012, the Mars Science Laboratory (MSL) entry vehicle successfully entered Mars atmosphere, flying a guided entry until parachute deploy. The Curiosity rover landed safely in Gale crater upon completion of the entry, descent, and landing sequence. This paper compares the aerodynamics of the entry capsule extracted from onboard flight data, including Inertial Measurement Unit (IMU) accelerometer and rate gyro information, and heatshield surface pressure measurements. From the onboard data, static force and moment data has been extracted. This data is compared to preflight predictions. The information collected by MSL represents the most complete set of information collected during Mars entry to date. It allows the separation of aerodynamic performance from atmospheric conditions. The comparisons show the MSL aerodynamic characteristics have been identified and resolved to an accuracy better than the aerodynamic database uncertainties used in preflight simulations. A number of small anomalies have been identified and are discussed. This data will help revise aerodynamic databases for future missions and will guide computational fluid dynamics (CFD) development to improve predictions.
C1 [Schoenenberger, Mark; Dyakonov, Artem] NASA, Langley Res Ctr, Hampton, VA 23681 USA.
   [Van Norman, John] NASA Langley, Hampton, VA USA.
RP Schoenenberger, M (reprint author), NASA, Langley Res Ctr, Hampton, VA 23681 USA.
NR 20
TC 0
Z9 0
U1 1
U2 1
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 1535
EP 1554
PN I-IV
PG 20
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700090
ER

PT S
AU Karlgaard, CD
   Kutty, P
   Schoenenberger, M
   Shidner, J
AF Karlgaard, Christopher D.
   Kutty, Prasad
   Schoenenberger, Mark
   Shidner, Jeremy
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI MARS SCIENCE LABORATORY ENTRY, DESCENT, AND LANDING TRAJECTORY AND
   ATMOSPHERE RECONSTRUCTION
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
AB On August 5th 2012, The Mars Science Laboratory entry vehicle successfully entered Mars' atmosphere and landed the Curiosity rover on its surface. A Kalman filter approach has been implemented to reconstruct the entry, descent, and landing trajectory based on all available data. The data sources considered in the Kalman filtering approach include the inertial measurement unit accelerations and angular rates, the terrain descent sensor, the measured landing site, orbit determination solutions for the initial conditions, and a new set of instrumentation for planetary entry reconstruction consisting of forebody pressure sensors, known as the Mars Entry Atmospheric Data System. These pressure measurements are unique for planetary entry, descent, and landing reconstruction as they enable a reconstruction of the freestream atmospheric conditions without any prior assumptions being made on the vehicle aerodynamics. Moreover, the processing of these pressure measurements in the Kalman filter approach enables the identification of atmospheric winds, which has not been accomplished in past planetary entry reconstructions. This separation of atmosphere and aerodynamics allows for aerodynamic model reconciliation and uncertainty quantification, which directly impacts future missions. This paper describes the mathematical formulation of the Kalman filtering approach, a summary of data sources and preprocessing activities, and results of the reconstruction.
C1 [Karlgaard, Christopher D.; Kutty, Prasad; Shidner, Jeremy] Analyt Mech Associates Inc, Hampton, VA 23666 USA.
   [Schoenenberger, Mark] NASA, Atmospher Flight & Entry Syst Branch, Langley Res Ctr, Hampton, VA USA.
RP Karlgaard, CD (reprint author), Analyt Mech Associates Inc, Hampton, VA 23666 USA.
NR 27
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 1555
EP 1574
PN I-IV
PG 20
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700091
ER

PT S
AU Munk, MM
   Little, A
   Kuhl, C
   Bose, D
   Santos, J
AF Munk, Michelle M.
   Little, Alan
   Kuhl, Chris
   Bose, Deepak
   Santos, Jose
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI THE MARS SCIENCE LABORATORY (MSL) ENTRY, DESCENT AND LANDING
   INSTRUMENTATION (MEDLI) HARDWARE
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
AB The Mars Science Laboratory (MSL) Entry, Descent and Landing Instrumentation (MEDLI) hardware was a first-of-its-kind sensor system that gathered engineering data from the MSL heatshield during Mars entry on August 6, 2012. MEDLI measured pressure and temperature, each at seven discrete locations determined by aerodynamicists and aerothermodynamicists. In this paper we will present a pictorial history and description of the MEDLI hardware, its requirements, and the unique aspects of the testing performed to qualify the hardware for the MSL mission environments. We will also discuss lessons learned and specific challenges in design and testing that may aid other instrumentation systems in decision-making.
C1 [Munk, Michelle M.; Kuhl, Chris] NASA, Langley Res Ctr, M-S 489,1 N Dryden St, Hampton, VA 23681 USA.
   [Little, Alan] NASA, Langley Res Ctr, M-S 494,2 N Dryden St, Hampton, VA 23681 USA.
   [Bose, Deepak] NASA, Ames Res Ctr, M-S 230-2, Moffett Field, CA 94035 USA.
   [Santos, Jose] NASA, Sierra Lobo Inc, Ames Res Ctr, M-S 229-4, Moffett Field, CA 94035 USA.
RP Munk, MM (reprint author), NASA, Langley Res Ctr, M-S 489,1 N Dryden St, Hampton, VA 23681 USA.
NR 15
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 1613
EP 1632
PN I-IV
PG 20
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700094
ER

PT S
AU Bose, D
   White, T
   Mahzari, M
   Edquist, K
AF Bose, Deepak
   White, Todd
   Mahzari, Milad
   Edquist, Karl
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI A RECONSTRUCTION OF AEROTHERMAL ENVIRONMENT AND THERMAL PROTECTION
   SYSTEM RESPONSE OF THE MARS SCIENCE LABORATORY ENTRY VEHICLE
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
AB An initial assessment and reconstruction of Mars Science Laboratory (MSL) entry aerothermal environment and thermal protection system (TPS) response is performed using the on-board instrumentation suite called MSL Entry, Descent, and Landing Instrumentation (MEDLI). The analysis is performed using the current best estimated trajectory. The MEDLI suite in part provides in-depth temperature measurements at seven locations on the heatshield. The temperature data show the occurrence of boundary layer transition to turbulence on the leeside forebody of the entry vehicle. The data also suggest that the TPS recession is lower than nominal model predictions using diffusion limited surface oxidation. The model predictions of temperatures show an underprediction in the stagnation and apex regions, and an overprediction in the leeside region. An estimate of time-varying aeroheating using an inverse reconstruction technique is also presented. The reconstructed aeroheating is sensitive to the choice of a recession model.
C1 [Bose, Deepak] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
   [White, Todd] ERC Inc, Moffett Field, CA 94035 USA.
   [Mahzari, Milad] Georgia Inst Technol, Atlanta, GA 30332 USA.
   [Edquist, Karl] NASA, Langley Res Ctr, Hampton, VA 23681 USA.
RP Bose, D (reprint author), NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
NR 23
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 1633
EP 1650
PN I-IV
PG 18
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700095
ER

PT S
AU Schratz, B
   Ilott, P
   Shidner, J
   Chen, A
   Bruvold, K
AF Schratz, Brian
   Ilott, Peter
   Shidner, Jeremy
   Chen, Allen
   Bruvold, Kristoffer
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI UHF RELAY PERFORMANCE DURING THE ENTRY DESCENT AND LANDING OF THE MARS
   SCIENCE LABORATORY
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
AB This paper discusses the MSL telecommunications configuration for UHF relay data during EDL, as well as the configuration of NASA's Mars Reconnaissance Orbiter and Mars Odyssey. Actual link performance will be compared to a priori predictions including signal strength, Doppler shift, UHF plasma blackout, and the range and angles between MSL and UHF relay assets. Predictions were generated using telecom link budgets and models developed at JPL. These data were also integrated into MSL's primary end-to-end EDL performance simulation, NASA Langley's Program to Optimize Simulated Trajectories II (POST2), which enabled telecom predictions based on Monte Carlo results of EDL simulations.
C1 [Schratz, Brian; Ilott, Peter; Chen, Allen; Bruvold, Kristoffer] CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
   [Shidner, Jeremy] Analyt Mech Associates Inc, Hampton, VA 23681 USA.
RP Schratz, B (reprint author), CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
NR 3
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 1651
EP 1670
PN I-IV
PG 20
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700096
ER

PT S
AU Davis, JL
   Shidner, JD
   Way, DW
AF Davis, Jody L.
   Shidner, Jeremy D.
   Way, David W.
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI MARS SCIENCE LABORATORY POST-LANDING LOCATION ESTIMATION USING POST2
   TRAJECTORY SIMULATION
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
AB The Mars Science Laboratory (MSL) Curiosity rover landed safely on Mars August 5th, 2012 at 10:32 PDT, Earth Received Time. Immediately following touchdown confirmation, best estimates of position were calculated to assist in determining official MSL locations during entry, descent and landing (EDL). Additionally, estimated balance mass impact locations were provided and used to assess how predicted locations compared to actual locations. For MSL, the Program to Optimize Simulated Trajectories II (POST2) was the primary trajectory simulation tool used to predict and assess EDL performance from cruise stage separation through rover touchdown and descent stage impact. This POST2 simulation was used during MSL operations for EDL trajectory analyses in support of maneuver decisions and imaging MSL during EDL. This paper presents the simulation methodology used and results of pre/post-landing MSL location estimates and associated imagery from Mars Reconnaissance Or biter's (MRO) High Resolution Imaging Science Experiment (HiRISE) camera. To generate these estimates, the MSL POST2 simulation nominal and Monte Carlo data, flight telemetry from onboard navigation, relay orbiter positions from MRO and Mars Odyssey and HiRISE generated digital elevation models (DEM) were utilized. A comparison of predicted rover and balance mass location estimations against actual locations are also presented.
C1 [Davis, Jody L.; Way, David W.] NASA, Langley Res Ctr, 1 North Dryden St,MS 489, Hampton, VA 23681 USA.
   [Shidner, Jeremy D.] Analyt Mech Assoc Inc, Hampton, VA 23681 USA.
RP Davis, JL (reprint author), NASA, Langley Res Ctr, 1 North Dryden St,MS 489, Hampton, VA 23681 USA.
EM jody.l.davis@nasa.gov; jeremy.d.shidner@nasa.gov; david.w.way@nasa.gov
NR 8
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 1671
EP 1685
PN I-IV
PG 15
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700097
ER

PT S
AU Chen, A
   Beck, R
   Brugarolas, P
   Edquist, K
   Mendeck, G
   Schoenenberger, M
   Way, D
AF Chen, Allen
   Beck, Robin
   Brugarolas, Paul
   Edquist, Karl
   Mendeck, Gavin
   Schoenenberger, Mark
   Way, David
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI ENTRY SYSTEM DESIGN AND PERFORMANCE SUMMARY FOR THE MARS SCIENCE
   LABORATORY MISSION
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
AB While the Sky Crane portion of Mars Science Laboratory's (MSL) Entry, Descent, and Landing (EDL) system draws well-deserved attention as the iconic image of the landing, the entry segment is at least an equally harrowing part of the journey where a multitude of opportunities for failure exist. Over 99% of the spacecraft's kinetic energy is dissipated during entry as the spacecraft goes from over 5.8 km/s to approximately 400 m/s; all before the use of the supersonic parachute or the descent engines in powered flight. The entry vehicle had to survive aerothermal heating and considerable aerodynamic deceleration (up to 15 Earth g's), all while autonomously executing hypersonic and supersonic maneuvering to target the landing site and increase altitude and timeline margins. This paper provides an overview of the entry segment environment, events, and designed capability. It also summarizes Curiosity's as flown entry performance on the night of August 5th as reconstructed by the flight team.
C1 [Chen, Allen; Brugarolas, Paul] CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
   [Beck, Robin] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
   [Edquist, Karl; Schoenenberger, Mark; Way, David] NASA, Langley Res Ctr, Hampton, VA 23681 USA.
   [Mendeck, Gavin] NASA, Johnson Space Ctr, Houston, TX 77058 USA.
RP Chen, A (reprint author), CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
NR 13
TC 0
Z9 0
U1 2
U2 2
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 1687
EP 1702
PN I-IV
PG 16
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700098
ER

PT S
AU Seubert, J
   Ely, T
   Prestage, J
   Tjoelker, R
AF Seubert, Jill
   Ely, Todd
   Prestage, John
   Tjoelker, Robert
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI THE DEEP SPACE ATOMIC CLOCK: USHERING IN A NEW PARADIGM FOR RADIO
   NAVIGATION AND SCIENCE
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
AB The Deep Space Atomic Clock (DSAC) mission will demonstrate the on-orbit performance of a high-accuracy, high-stability miniaturized mercury ion atomic clock during a year-long experiment in Low Earth Orbit. DSAC's timing error requirement provides the frequency stability necessary to perform deep space navigation based solely on one-way radiometric tracking data. Compared to a two-way tracking paradigm, DSAC-enabled one-way tracking will benefit navigation and radio science by increasing the quantity and quality of tracking data. Additionally, DSAC also enables fully-autonomous onboard navigation useful for time-sensitive situations. The technology behind the mercury ion atomic clock and a DSAC mission overview are presented. Example deep space applications of DSAC, including navigation of a Mars orbiter and Europa flyby gravity science, highlight the benefits of DSAC-enabled one-way Doppler tracking.
C1 [Seubert, Jill; Ely, Todd] CALTECH, Jet Prop Lab, Mission Design & Nav, 4800 Oak Grove Dr,M-S 301-121, Pasadena, CA 91109 USA.
   [Prestage, John] CALTECH, Jet Prop Lab, Commun Architectures & Res, Pasadena, CA 91109 USA.
   [Tjoelker, Robert] CALTECH, Jet Prop Lab, Tracking Syst & Applicat, Pasadena, CA 91109 USA.
RP Seubert, J (reprint author), CALTECH, Jet Prop Lab, Mission Design & Nav, 4800 Oak Grove Dr,M-S 301-121, Pasadena, CA 91109 USA.
NR 18
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 1851
EP 1865
PN I-IV
PG 15
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700107
ER

PT S
AU Acikmese, B
   Aung, M
   Casoliva, J
   Mohan, S
   Johnson, A
   Scharf, D
   Masten, D
   Scotkin, J
   Wolf, A
   Regehr, MW
AF Acikmese, Behcet
   Aung, MiMi
   Casoliva, Jordi
   Mohan, Swati
   Johnson, Andrew
   Scharf, Daniel
   Masten, David
   Scotkin, Joel
   Wolf, Aron
   Regehr, Martin W.
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI FLIGHT TESTING OF TRAJECTORIES COMPUTED BY G-FOLD: FUEL OPTIMAL LARGE
   DIVERT GUIDANCE ALGORITHM FOR PLANETARY LANDING
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
AB G-FOLD, Guidance for Fuel Optimal Large Divert, is an algorithm that is developed to compute, onboard in real-time, fuel optimal trajectories for large divert maneuvers necessary for planetary pinpoint or precision landing. The algorithm incorporates all relevant mission constraints and computes the global optimal trajectory. It is based on a mathematical result known as "lossless convexification" of the associated optimal control problem, which allowed us to formulate the problem as a convex optimization problem and to guarantee obtaining the global optimal solution when a feasible solution exists. Hence the algorithm ensures that all physically achievable diverts are also computable in real-time. This paper reports the first three flight test results of G-FOLD generated trajectories. The goal of these tests were to test pre-flight computed G-FOLD trajectories to demonstrate that they are computed with relevant mission constraints and appropriate vehicle dynamics accounted for. The results showed good agreement with the desired ideal trajectories with mismatches below expected bounds, which validated that the desired outcome that the trajectories were computed by using the right problem description and the resulting trajectories are flyable.
C1 [Acikmese, Behcet] Univ Texas Austin, Aerosp Engn & Engn Mech, Austin, TX 78712 USA.
   [Aung, MiMi; Casoliva, Jordi; Mohan, Swati; Johnson, Andrew; Scharf, Daniel; Wolf, Aron; Regehr, Martin W.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
   [Masten, David; Scotkin, Joel] Masten Space Syst Inc, Mojave, CA 93501 USA.
RP Acikmese, B (reprint author), Univ Texas Austin, Aerosp Engn & Engn Mech, Austin, TX 78712 USA.
NR 18
TC 1
Z9 1
U1 1
U2 1
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 1867
EP 1880
PN I-IV
PG 14
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700108
ER

PT S
AU Folta, DC
   Pavlak, TA
   Haapala, AF
   Howell, KC
AF Folta, David C.
   Pavlak, Thomas A.
   Haapala, Amanda F.
   Howell, Kathleen C.
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI PRELIMINARY DESIGN CONSIDERATIONS FOR ACCESS AND OPERATIONS IN
   EARTH-MOON L-1/L-2 ORBITS
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
AB Within the context of manned spaceflight activities, Earth-Moon libration point orbits could support lunar surface operations and serve as staging areas for future missions to near-Earth asteroids and Mars. This investigation examines preliminary design considerations including Earth-Moon L-1/L-2 libration point orbit selection, transfers, and stationkeeping costs associated with maintaining a spacecraft in the vicinity of L-1 or L-2 for a specified duration. Existing tools for multi-body trajectory design, dynamical systems theory, and orbit maintenance are leveraged in this analysis to explore end-to-end concepts for manned missions to Earth-Moon libration points.
C1 [Folta, David C.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
   [Pavlak, Thomas A.] Purdue Univ, Sch Aeronaut & Astronaut, W Lafayette, IN 47907 USA.
   [Haapala, Amanda F.] Purdue Univ, Sch Aeronaut & Astronaut, Aeronaut & Astronaut Engn, W Lafayette, IN 47907 USA.
RP Folta, DC (reprint author), NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
NR 21
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 2073
EP 2092
PN I-IV
PG 20
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700120
ER

PT S
AU Garner, CE
   Rayman, MM
   Whiffen, GJ
   Brophy, JR
   Mikes, SC
AF Garner, Charles E.
   Rayman, Mark M.
   Whiffen, Greg J.
   Brophy, John R.
   Mikes, Steven C.
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI ION PROPULSION: AN ENABLING TECHNOLOGY FOR THE DAWN MISSION
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
AB The Dawn mission, part of NASA's Discovery Program, has as its goal the scientific exploration of the two most massive main-belt asteroids, 4 Vesta, and the dwarf planet 1 Ceres. The Dawn spacecraft was launched from the Cape Canaveral Air Force Station on September 27, 2007 on a Delta-II 7925H-9.5 rocket that placed the 1218-kg spacecraft into an Earth-escape (heliocentic) trajectory with an escape velocity of 11 km/s. On-board the spacecraft is an ion propulsion system (IPS) developed at the Jet Propulsion Laboratory which will provide an additional delta-V of approximately 11 km/s for the heliocentric transfers to each body and for all orbit transfers including orbit capture/escape and transition to the various science orbits. Deterministic thrusting to Vesta began in December 2007 and concluded with orbit capture at Vesta in July 2011. The transfer to Vesta included a Mars gravity assist flyby in February 2009 that provided an additional delta-V of 2.6 km/s and was the only post-launch mission delta-V not provided by IPS. The IPS was used during the 14 months at Vesta for all science orbit transfers and then for Vesta escape. Deterministic thrusting for Ceres began in late August 2012 with a planned arrival date at Ceres in early 2015, whereupon IPS will be used for all science orbit transfers. As of January 2013 the IPS has been operated for approximately 28,000 hours, consumed approximately 280 kg of xenon, and provided a delta-V of approximately 7.5 km/s, the most post-launch delta-V of any spacecraft yet flown. IPS performance characteristics are very close to the expected performance based on analysis and testing performed pre-launch. Use of the IPS together with a medium-priced launch vehicle enabled this high delta-V mission to be performed within the Discovery Program cost cap. This paper provides an overview of the Dawn IPS and its mission operations through departure for Ceres.
C1 [Garner, Charles E.; Brophy, John R.] CALTECH, Jet Prop Lab, Prop Thermal & Mat Engn Sect, Pasadena, CA 91125 USA.
   [Rayman, Mark M.] CALTECH, Jet Prop Lab, Pasadena, CA 91125 USA.
   [Whiffen, Greg J.] CALTECH, Jet Prop Lab, Mission Design & Nav Sect, Pasadena, CA 91125 USA.
   [Mikes, Steven C.] CALTECH, Jet Prop Lab, Flight Syst Avion Sect, Pasadena, CA 91125 USA.
RP Garner, CE (reprint author), CALTECH, Jet Prop Lab, Prop Thermal & Mat Engn Sect, Pasadena, CA 91125 USA.
NR 14
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 2195
EP 2213
PN I-IV
PG 19
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700126
ER

PT S
AU Whiffen, GJ
AF Whiffen, Gregory J.
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI THRUST DIRECTION OPTIMIZATION: SATISFYING DAWN'S ATTITUDE AGILITY
   CONSTRAINTS
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
AB The science objective of NASA's Dawn Discovery mission is to explore the giant asteroid Vesta and the dwarf planet Ceres, the two largest members of the main asteroid bell Dawn successfully completed its orbital mission at Vesta. The Dawn spacecraft has complex, difficult to quantify, and in some cases severe limitations on its attitude agility.2 The low-thrust transfers between science orbits at Vesta required very complex time varying thrust directions due to the strong and complex gravity and various science objectives. Traditional low-thrust design objectives (like minimum AV or minimum transfer time) often result in thrust direction time evolutions that cannot be accommodated with the attitude control system available on Dawn. This paper presents several new optimal control objectives, collectively called thrust direction optimization that were developed and turned out to be essential to the successful navigation of Dawn at Vesta.
C1 [Whiffen, Gregory J.] CALTECH, Jet Prop Lab, Mission Design & Nav Sect, Mail Stop 264-820,4800 Oak Grove Dr, Pasadena, CA 91109 USA.
RP Whiffen, GJ (reprint author), CALTECH, Jet Prop Lab, Mission Design & Nav Sect, Mail Stop 264-820,4800 Oak Grove Dr, Pasadena, CA 91109 USA.
NR 5
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 2215
EP 2230
PN I-IV
PG 16
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700127
ER

PT S
AU Asmar, S
   Konopliv, A
   Park, R
   Raymond, C
AF Asmar, Sami
   Konopliv, Alex
   Park, Ryan
   Raymond, Carol
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI RECOVERING THE GRAVITY FIELD OF VESTA FROM DAWN
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
AB The successfully completed Dawn mission to asteroid Vesta has lead to the generation of a global solution of gravity measurements of degree and order 20. When correlated with a shape model derived from imaging, these data can constrain the interior structure from the crust to possible core. Utilizing precision spacecraft Doppler measurements and landmark tracking from framing camera images to measure the gravity field, the solution also yields the spin-pole location and rotation. The second-degree harmonics together with assumptions on obliquity or hydrostatic equilibrium determine the moments of inertia and constrain the core size and density. J2 parameter shows inconsistency with a homogenous density body. This paper describes the investigation development and its scientific results.
C1 [Asmar, Sami; Konopliv, Alex; Park, Ryan; Raymond, Carol] CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
RP Asmar, S (reprint author), CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
NR 4
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 2311
EP 2316
PN I-IV
PG 6
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700132
ER

PT S
AU Hejduk, MD
   Plakalovic, D
   Newman, LK
   Ollivierre, JC
   Hametz, ME
   Beaver, BA
   Thompson, RC
AF Hejduk, M. D.
   Plakalovic, D.
   Newman, L. K.
   Ollivierre, J. C.
   Hametz, M. E.
   Beaver, B. A.
   Thompson, R. C.
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI TRAJECTORY ERROR AND COVARIANCE REALISM FOR LAUNCH COLA OPERATIONS
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
AB Non-uniform guidance and practices for Launch Collision Avoidance (LCOLA) among different NASA field centers (and the Air Force launch ranges) has prompted NASA Headquarters to commission a study to develop recommendations for standardizing the process and for suggested screening thresholds. The full study will be completed in early 2013, but the results for the initial phases are reported herein, namely an investigation of the accuracies of the pre-launch predicted trajectories and the realism of their associated covariances. The study determined that, for the Atlas V and Delta II launch vehicles, trajectory errors remain approximately an order of magnitude larger than General Perturbations (GP) satellite catalogue errors, confirming that it is not necessary to resort to a precision catalogue to perform LCOLA screenings. The associated launch covariances, which are large and had been thought to be conservatively sized, were found instead to be quite appropriately determined and fare well in covariance realism analyses. As such, the launch-related information feeding the LCOLA process will allow a durable calculation of the probability of collision and thus can serve as a reliable basis for LCOLA operations.
C1 [Hejduk, M. D.; Plakalovic, D.] Ai Solut Inc, Mission Serv Div, 985 Space Ctr Dr,Suite 205, Colorado Springs, CO 80915 USA.
   [Newman, L. K.] NASA, Goddard Space Flight Ctr, Robot Conjunct, Robot Syst Protect Program, Greenbelt, MD 20771 USA.
   [Ollivierre, J. C.] Flight Anal Branch Chief, Launch Serv Program, Kennedy Space Ctr, FL 32899 USA.
   [Hametz, M. E.] Ai Solut Inc, Launch Serv Div, Canaveral, FL 32920 USA.
   [Beaver, B. A.] Launch Serv Program, Kennedy Space Ctr, FL 32899 USA.
   [Thompson, R. C.] Aerosp Corp, Chantilly, VA 20151 USA.
RP Hejduk, MD (reprint author), Ai Solut Inc, Mission Serv Div, 985 Space Ctr Dr,Suite 205, Colorado Springs, CO 80915 USA.
NR 5
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 2371
EP 2390
PN I-IV
PG 20
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700136
ER

PT S
AU Zanetti, R
   Ainscough, T
   Christian, J
   Spanos, PD
AF Zanetti, Renato
   Ainscough, Thomas
   Christian, John
   Spanos, Pol D.
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI Q-METHOD EXTENDED KALMAN FILTER
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
ID ATTITUDE-DETERMINATION; SPACECRAFT ATTITUDE; VECTOR OBSERVATIONS;
   QUATERNION ESTIMATION; ALGORITHM; REQUEST; QUEST
AB A new algorithm is proposed that smoothly integrates the non-linear estimation of the attitude quaternion using Davenport's q-method and the estimation of nonattitude states through an extended Kalman filter. The new algorithm is compared to an existing similar one and the various similarities and differences are discussed. The validity of the proposed approach is confirmed by pertinent numerical simulations.
C1 [Ainscough, Thomas] Rice Univ, US Air Force, Houston, TX 77058 USA.
   [Ainscough, Thomas] Charles Stark Draper Lab, Houston, TX 77058 USA.
   [Christian, John] NASA, Johnson Space Ctr, GNC Autonomous Flight Syst Branch, Houston, TX 77058 USA.
   [Spanos, Pol D.] Rice Univ, Engn, Houston, TX 77005 USA.
EM rzanetti@draper.com; tainscough@draper.com; spanos@rice.edu
NR 23
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 2461
EP 2476
PN I-IV
PG 16
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700141
ER

PT S
AU Anderson, P
   Macdonald, M
   Yen, CWL
AF Anderson, Pamela
   Macdonald, Malcolm
   Yen, Chen-wan L.
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI NOVEL ORBITS OF MERCURY AND VENUS ENABLED USING LOW-THRUST PROPULSION
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
AB Exploration of the inner planets of the Solar System is vital to significantly enhance the understanding of the formulation of Earth and other planets. This paper therefore considers the development of novel orbits of both Mercury and Venus to enhance the opportunities for remote sensing. Continuous low-thrust propulsion is used to extend the critical inclination of highly elliptical orbits at each planet, which are shown to require very small acceleration magnitudes. Unlike other bodies in the Solar System, natural sun-synchronous orbits do not exist at Mercury or Venus. This research therefore also uses continuous acceleration to enable both circular and elliptical sun-synchronous orbits, which could significantly simplify the spacecraft thermal environment. Considerably high thrust levels are however required to enable these orbits, which could not be provided by current propulsion systems.
C1 [Anderson, Pamela; Macdonald, Malcolm] Univ Strathclyde, Adv Space Concepts Lab, Mech & Aerosp Engn, Glasgow G4 0LT, Lanark, Scotland.
   [Yen, Chen-wan L.] JPL, Pasadena, CA 91109 USA.
RP Anderson, P (reprint author), Univ Strathclyde, Adv Space Concepts Lab, Mech & Aerosp Engn, Glasgow G4 0LT, Lanark, Scotland.
EM pamela.c.anderson@strath.ac.uk; Malcolm.macdonald.102@strath.ac.uk;
   chen-wan.l.yen@jpl.nasa.gov
NR 14
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 2659
EP 2678
PN I-IV
PG 20
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700152
ER

PT S
AU Folta, D
   Demcak, S
   Young, B
   Berry, K
AF Folta, David
   Demcak, Stuart
   Young, Brian
   Berry, Kevin
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI TRANSFER TRAJECTORY DESIGN FOR THE MARS ATMOSPHERE AND VOLATILE
   EVOLUTION (MAVEN) MISSION
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
AB The Mars Atmosphere and Volatile EvolutioN (MAVEN) mission will determine the history of the loss of volatiles from the Martian atmosphere from a highly inclined elliptical orbit. MAVEN will launch from Cape Canaveral Air Force Station on an Atlas-V 401 during an extended 36-day launch period opening November 18, 2013. The MAVEN Navigation and Mission Design team performed a Monte Carlo analysis of the Type-II transfer to characterize; dispersions of the arrival B-Plane, trajectory correction maneuvers (TCMs), and the probability of Mars impact. This paper presents detailed analysis of critical MOI event coverage, maneuver constraints, AV-99 budgets, and Planetary Protection requirements.
C1 [Folta, David; Berry, Kevin] NASA, Goddard Space Flight Ctr, Bldg 11,Room S116, Greenbelt, MD 20771 USA.
   [Demcak, Stuart; Young, Brian] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
RP Folta, D (reprint author), NASA, Goddard Space Flight Ctr, Bldg 11,Room S116, Greenbelt, MD 20771 USA.
EM david.c.folta@nasa.gov; stuart.Demcak@jpl.nasa.gov;
   brian.t.young@jpl.nasa.gov; kevin.e.berry@nasa.gov
NR 6
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 2845
EP 2858
PN I-IV
PG 14
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700162
ER

PT S
AU Campagnola, S
   Buffington, BB
   Petropoulos, AE
AF Campagnola, Stefano
   Buffington, Brent B.
   Petropoulos, Anastassios E.
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI JOVIAN TOUR DESIGN FOR ORBITER AND LANDER MISSIONS TO EUROPA
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
ID GRAPH
AB Europa is one of the most interesting targets for solar system exploration, as its ocean of liquid water could harbor life. Following the recommendation of the Planetary Decadal Survey, NASA commissioned a study for a flyby mission, an orbiter mission, and a lander mission. This paper presents the moon tours for the lander and orbiter concepts. The total Delta v and radiation dose would be reduced by exploiting multi-body dynamics and avoiding phasing loops in the Ganymede-to-Europa transfer. Tour 11-O3, 12-L1 and 12-L4 are presented in details and their performances compared to other tours from previous Europa mission studies.
C1 [Campagnola, Stefano] JAXA, ISAS, Dept Space Flight Syst, Chuo Ku, Yoshinodai 3-1-1, Sagamihara, Kanagawa 2525210, Japan.
   [Buffington, Brent B.; Petropoulos, Anastassios E.] CALTECH, Jet Prop Lab, Outer Planet Mission Anal Grp, Pasadena, CA 91109 USA.
RP Campagnola, S (reprint author), JAXA, ISAS, Dept Space Flight Syst, Chuo Ku, Yoshinodai 3-1-1, Sagamihara, Kanagawa 2525210, Japan.
EM stefano.campagnola@jaxa.jp; brent.buffington@jpl.nasa.gov;
   anastassios.e.petropoulos@jpl.nasa.gov
NR 37
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 2919
EP 2936
PN I-IV
PG 18
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700167
ER

PT S
AU Landau, D
   Dankanich, J
   Strange, N
   Bellerose, J
   Llanos, P
   Tantardini, M
AF Landau, Damon
   Dankanich, John
   Strange, Nathan
   Bellerose, Julie
   Llanos, Pedro
   Tantardini, Marco
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI TRAJECTORIES TO NAB A NEA (NEAR-EARTH ASTEROID)
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
AB In 2010 and 2011 NASA and Keck Institute for Space Studies sponsored investigations into the feasibility of identifying, capturing, and returning an entire (albeit small) NEA to the vicinity of Earth, and concluded that a 40-kW solar electric propulsion system launched on an Atlas 551 provided sufficient propulsion to control an asteroid's trajectory. Once secured by the spacecraft, a NEA with a naturally close encounter with Earth is nudged over a few years to target a lunar gravity assist, capturing the object into Earth orbit. With further use of solar perturbations, up to 3,600,000 kg of NEA could be placed in high-lunar orbit.
C1 [Landau, Damon] CALTECH, Mission Design & Nav Sect, Jet Prop Lab, 4800 Oak Grove Dr,M-S 301-121, Pasadena, CA 91109 USA.
   [Dankanich, John] AeroDank Inc, NASA Programs, Cleveland, OH 44135 USA.
   [Strange, Nathan] CALTECH, Mission Concepts Sect, Jet Prop Lab, Pasadena, CA 91109 USA.
   [Bellerose, Julie] Carnegie Mellon Univ, Res Fac, NASA, ARC, Moffett Field, CA 94035 USA.
   [Llanos, Pedro] GMV, Flight Mech Grp, Madrid 28760, Spain.
RP Landau, D (reprint author), CALTECH, Mission Design & Nav Sect, Jet Prop Lab, 4800 Oak Grove Dr,M-S 301-121, Pasadena, CA 91109 USA.
OI Tantardini, Marco/0000-0001-9620-3512
NR 9
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 3251
EP 3262
PN I-IV
PG 12
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700186
ER

PT S
AU Bhaskaran, S
   Kennedy, B
AF Bhaskaran, Shyam
   Kennedy, Brian
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI TERMINAL GUIDANCE NAVIGATION FOR AN ASTEROID IMPACTOR SPACECRAFT
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
AB Near Earth Asteroids could potentially cause a great deal of devastation if one were to impact the Earth. If such an asteroid were found, the next step would be to mitigate the threat by one of several options, the most viable of which is to deflect the asteroids trajectory such that it misses the Earth by hitting it at a very high velocity with a spacecraft. The technology to perform such a deflection has been demonstrated by the Deep Impact (DI) mission, which successfully collided with comet Tempel 1 in July 2005 using an onboard autonomous navigation system, called AutoNav, for the terminal phase of the mission. In this paper, we evaluate the ability of AutoNav to impact a wide range of scenarios that an deflection mission could encounter, varying parameters such as the approach velocity, phase angle, size of the asteroid, and the determination of spacecraft attitude. Using realistic Monte Carlo simulations, we tabulated the probability of success of the deflection as a function of these parameters, and find the highest sensitivity to be due the spacecraft attitude determination mode. We conclude with some recommendations for future work.
C1 [Bhaskaran, Shyam; Kennedy, Brian] CALTECH, Nav & Mission Design Sect, Jet Prop Lab, MS 264-820,4800 Oak Grove Dr, Pasadena, CA 91109 USA.
RP Bhaskaran, S (reprint author), CALTECH, Nav & Mission Design Sect, Jet Prop Lab, MS 264-820,4800 Oak Grove Dr, Pasadena, CA 91109 USA.
NR 14
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 3295
EP 3312
PN I-IV
PG 18
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700189
ER

PT S
AU Sell, S
   Davis, J
   San Martin, M
   Serricchio, F
AF Sell, Steven
   Davis, Jody
   San Martin, Miguel
   Serricchio, Frederick
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI POWERED FLIGHT DESIGN AND RECONSTRUCTED PERFORMANCE SUMMARY FOR THE MARS
   SCIENCE LABORATORY MISSION
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
AB The Powered Flight segment of Mars Science Laboratory's (MSL) Entry, Descent, and Landing (EDL) system extends from backshell separation through landing. This segment is responsible for removing the final 0.1% of the kinetic energy dissipated during EDL and culminating with the successful touchdown of the rover on the surface of Mars. Many challenges exist in the Powered Flight segment: extraction of Powered Descent Vehicle from the backshell, performing a 300m divert maneuver to avoid the backshell and parachute, slowing the descent from 85 m/s to 0.75 m/s and successfully lowering the rover on a 7.5m bridle beneath the rocket-powered Descent Stage and gently placing it on the surface using the Sky Crane Maneuver. Finally, the nearly-spent Descent Stage must execute a Flyaway maneuver to ensure surface impact a safe distance from the Rover. This paper provides an overview of the powered flight design, key features, and event timeline. It also summarizes Curiosity's as flown performance on the night of August 5th as reconstructed by the flight team.
C1 [Sell, Steven; San Martin, Miguel; Serricchio, Frederick] CALTECH, Mars Sci Lab, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
   [Davis, Jody] NASA, Langley Res Ctr, Mars Sci Lab, Hampton, VA 23681 USA.
RP Sell, S (reprint author), CALTECH, Mars Sci Lab, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
NR 6
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 3387
EP 3406
PN I-IV
PG 20
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700194
ER

PT S
AU Chen, A
   Greco, M
   Martin-Mur, T
   Portock, B
   Steltzner, A
AF Chen, Allen
   Greco, Martin
   Martin-Mur, Tomas
   Portock, Brian
   Steltzner, Adam
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI APPROACH AND ENTRY, DESCENT, AND LANDING OPERATIONS FOR THE MARS SCIENCE
   LABORATORY MISSION
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
AB On August 5th, 2012, at 10:31 PM PDT, the Mars Science Laboratory (MSL) rover Curiosity landed safely within Gale Crater. Her successful landing depended not only upon the flawless execution of the numerous critical activities during the seven minute entry, descent, and landing (EDL), but also upon the operational preparations and decisions made by the flight team during approach, the final weeks, days, and hours prior to landing. During this period, decisions made by the flight team balanced operational risk to the spacecraft in flight with any resulting risks incurred during EDL as a result of those decisions. This paper summarizes the operations plans made in preparation for Approach and EDL and the as flown decisions and actions executed that balanced the operational and EDL risks and prepared the vehicle for a successful landing.
C1 [Chen, Allen; Greco, Martin; Martin-Mur, Tomas; Portock, Brian; Steltzner, Adam] CALTECH, Mars Sci Lab, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
RP Chen, A (reprint author), CALTECH, Mars Sci Lab, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
NR 4
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 3407
EP 3424
PN I-IV
PG 18
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700195
ER

PT S
AU Gostelow, KP
AF Gostelow, Kim P.
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI THE MARS SCIENCE LABORATORY ENTRY, DESCENT, AND LANDING FLIGHT SOFTWARE
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
AB This paper describes the design, development, and testing of the EDL program from the perspective of the software engineer. We briefly cover the overall MSL flight software organization, and then the organization of EDL itself. We discuss the timeline, the structure of the GNC code (but not the algorithms as they are covered elsewhere in this conference) and the command and telemetry interfaces. Finally, we cover testing and the influence that testability had on the EDL flight software design.
C1 [Gostelow, Kim P.] CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91009 USA.
RP Gostelow, KP (reprint author), CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91009 USA.
NR 2
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 3425
EP 3434
PN I-IV
PG 10
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700196
ER

PT S
AU Guernsey, CS
   Weiss, JM
AF Guernsey, Carl S.
   Weiss, Jeffrey M.
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI LESSONS LEARNED FROM THE DEVELOPMENT OF THE MSL DESCENT STAGE PROPULSION
   SYSTEM
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
AB Development of the MSL descent stage propulsion system required a number of new propulsion hardware developments incorporating technologies not normally found in spacecraft propulsion subsystems. These developments were driven by the relatively high (25,000 N) maximum thrust level and the requirement for precise throttling of the main engines. This paper presents lessons learned in the course of these developments, including surprises and anomalies discovered at both the component and subsystem levels.
C1 [Guernsey, Carl S.; Weiss, Jeffrey M.] CALTECH, Jet Prop Lab, Prop Thermal & Mat Engn, Pasadena, CA USA.
RP Guernsey, CS (reprint author), CALTECH, Jet Prop Lab, Prop Thermal & Mat Engn, Pasadena, CA USA.
NR 15
TC 0
Z9 0
U1 1
U2 1
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 3435
EP 3452
PN I-IV
PG 18
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700197
ER

PT S
AU Weiss, JM
   Guernsey, CS
AF Weiss, Jeffrey M.
   Guernsey, Carl S.
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI DESIGN AND DEVELOPMENT OF THE MSL DESCENT STAGE PROPULSION SYSTEM
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
AB On August 5, 2012, The Mars Science Laboratory mission successfully landed the largest interplanetary rover ever built, Curiosity, on the surface of Mars. The Entry, Descent, and Landing (EDL) phase of this mission was by far the most complex landing ever attempted on a planetary body. The Descent Stage Propulsion System played an integral and critical role during Curiosity's EDL. The Descent Stage Propulsion System was a one of a kind hydrazine propulsion system designed specifically for the EDL phase of the MSL mission. It was designed, built, and tested at the Jet Propulsion Laboratory (JPL). The purpose of this paper is to present an overview of the design and development of the MSL Descent Stage Propulsion System. Driving requirements, system design, component selection, operational sequence of the system at Mars, new developments, and key challenges will be discussed.
C1 [Weiss, Jeffrey M.; Guernsey, Carl S.] CALTECH, Prop Thermal & Mat Engn Sect, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
RP Weiss, JM (reprint author), CALTECH, Prop Thermal & Mat Engn Sect, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
NR 11
TC 1
Z9 1
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 3453
EP 3466
PN I-IV
PG 14
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700198
ER

PT S
AU Parker, M
   Baker, R
   Casillas, A
   Strommen, D
   Tanimoto, R
AF Parker, Morgan
   Baker, Ray
   Casillas, Art
   Strommen, Dellon
   Tanimoto, Rebekah
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI FABRICATION ASSEMBLY AND TEST OF THE MARS SCIENCE LABORATORY DESCENT
   STAGE PROPULSION SYSTEM
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
AB The Descent Stage Propulsion System (DSPS) is the most challenging and complex propulsion system ever built at JPL. Performance requirements, such as the entry Reaction Control System (RCS) requirements, and the terminal descent requirements (3300 N maximum thrust and similar to 835,000 N-s total impulse in less than a minute), required a large amount of propellant and a large number of components for a spacecraft that had to fit in a 4.5 meter aeroshell. The size and shape of the aeroshell, along with the envelope of the stowed rover, limited the configuration options for the Descent Stage structure. The configuration and mass constraints of the Descent Stage structure, along with performance requirements, drove the configuration of the DSPS. This paper will examine some of the challenges encountered and solutions developed during the fabrication, assembly, and test of the DSPS.
C1 [Parker, Morgan; Baker, Ray; Casillas, Art; Tanimoto, Rebekah] CALTECH, Jet Prop Lab, Prop Thermal & Mat Engn, Pasadena, CA USA.
   [Strommen, Dellon] CALTECH, Jet Prop Lab, Prop & Fluid Syst, Mech Fabricat & Test, Pasadena, CA USA.
RP Parker, M (reprint author), CALTECH, Jet Prop Lab, Prop Thermal & Mat Engn, Pasadena, CA USA.
NR 4
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 3467
EP 3485
PN I-IV
PG 19
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700199
ER

PT S
AU Stehura, A
   Rozek, M
AF Stehura, Aaron
   Rozek, Matthew
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI MANAGING COMPLEXITY IN THE MSL/CURIOSITY ENTRY, DESCENT, AND LANDING
   FLIGHT SOFTWARE AND AVIONICS VERIFICATION AND VALIDATION CAMPAIGN
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
AB The complexity of the Mars Science Laboratory (MSL) mission presented the Entry, Descent, and Landing systems engineering team with many challenges in its Verification and Validation (V&V) campaign. This paper describes some of the logistical hurdles related to managing a complex set of requirements, test venues, test objectives, and analysis products in the implementation of a specific portion of the overall V&V program to test the interaction of flight software with the MSL avionics suite. Application-specific solutions to these problems are presented herein, which can be generalized to other space missions and to similar formidable systems engineering problems.
C1 [Stehura, Aaron; Rozek, Matthew] CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
RP Stehura, A (reprint author), CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
NR 16
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 3487
EP 3510
PN I-IV
PG 24
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700200
ER

PT S
AU Kornfeld, RP
   Prakash, R
   Chen, A
   Devereaux, AS
   Greco, ME
   Harmon, CC
   Kipp, DM
   San Martin, AM
   Sell, SW
   Steltzner, AD
AF Kornfeld, Richard P.
   Prakash, Ravi
   Chen, Allen
   Devereaux, Ann S.
   Greco, Martin E.
   Harmon, Corey C.
   Kipp, Devin M.
   San Martin, A. Miguel
   Sell, Steven W.
   Steltzner, Adam D.
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI VERIFICATION AND VALIDATION OF THE MARS SCIENCE LABORATORY/CURIOSITY
   ROVER ENTRY DESCENT AND LANDING SYSTEM
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
AB On August 6, 2012, the Curiosity rover successfully touched down on the Martian surface setting off the most ambitious surface exploration of this planetary body. Preceding this significant step were years of design, development and testing of the Curiosity Entry, Descent and Landing (EDL) system to prepare for the most complex landing endeavor ever attempted at Mars. This paper discusses the approach and implementation of the overall EDL verification and validation (V&V) program. The overall lessons learned and conclusions described herein can serve as a pathfinder for the EDL system testing approach and implementation of future Mars landed missions.
C1 [Kornfeld, Richard P.] CALTECH, Jet Prop Lab, Validat, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
   [Prakash, Ravi; Chen, Allen; Greco, Martin E.; Harmon, Corey C.; Kipp, Devin M.; San Martin, A. Miguel; Sell, Steven W.; Steltzner, Adam D.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
   [Devereaux, Ann S.] CALTECH, Jet Prop Lab, Verificat, Pasadena, CA 91109 USA.
RP Kornfeld, RP (reprint author), CALTECH, Jet Prop Lab, Validat, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
NR 47
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 3511
EP 3539
PN I-IV
PG 29
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700201
ER

PT S
AU Nayak, MV
   Udrea, B
   Marsella, B
   Beck, JR
AF Nayak, Michael V.
   Udrea, Bogdan
   Marsella, Brandon
   Beck, Jaclyn R.
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI APPLICATION OF A LASER RANGEFINDER FOR SPACE OBJECT IMAGING AND SHAPE
   RECONSTRUCTION
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
AB This paper addresses the feasibility of using point clouds generated with a single-beam laser rangefinder (LRF) to reconstruct the three-dimensional shape of an unknown Resident Space Object (RSO), employing a combination of relative motion between the chaser and the RSO and chaser attitude motion. The first step in the analysis is the application of both an LRF and a scanning LIDAR to image and reconstruct the shape of a tri-axial ellipsoid of diffuse constant reflectivity. A single beam LRF, and a multi-beam scanning LIDAR are simulated. Next, the techniques designed above are applied to the imaging of a Resident Space Object (RSO) in the shape of generic telecommunications satellite. Various inclination and attitude maneuver test cases are explored to obtain a desired level of LRF point cloud density. The study concludes that, for error-free measurements, the LRF can effectively create sufficiently dense point clouds for various asteroid and satellite shaped SOs, with low propellant consumption, by exploiting a designed combination of Keplerian and attitude motion. Finally, the technique is further tested through inclusion of two sensor error models. Results will be applied to ARAPAIMA, a nanosatellite mission funded under the US Air Force Office of Scientific Research University Nanosat Program UNP) Cycle 8.
C1 [Nayak, Michael V.] Space Dev & Test Directorate, Res Dev Test & Evaluat Support Ctr RSC, 3548 Aberdeen Ave SE, Albuquerque, NM 87117 USA.
   [Udrea, Bogdan; Marsella, Brandon] Embry Riddle Aeronaut Univ, Dept Aerosp Engn, Daytona Beach, FL 32114 USA.
   [Beck, Jaclyn R.] NASA Goddard Space Flight Ctr, Appl Energy & Technol Directorate, Greenbelt, MD 20770 USA.
RP Nayak, MV (reprint author), Space Dev & Test Directorate, Res Dev Test & Evaluat Support Ctr RSC, 3548 Aberdeen Ave SE, Albuquerque, NM 87117 USA.
EM michael.nayak@kirtland.af.mil
NR 8
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 3543
EP 3563
PN I-IV
PG 21
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700202
ER

PT S
AU Morgan, D
   Chung, SJ
   Hadaegh, FY
AF Morgan, Daniel
   Chung, Soon-Jo
   Hadaegh, Fred Y.
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI DECENTRALIZED MODEL PREDICTIVE CONTROL OF SWARMS OF SPACECRAFT USING
   SEQUENTIAL CONVEX PROGRAMMING
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
ID FORMATION FLYING GUIDANCE; ALGORITHM
AB This paper presents a decentralized, model predictive control algorithm for the reconfiguration of swarms of spacecraft composed of hundreds to thousands of agents with limited capabilities. In our prior work, sequential convex programming has been used to determine collision-free, fuel-efficient trajectories for the reconfiguration of spacecraft swarms. This paper uses a model predictive control approach to implement the sequential convex programming algorithm in real-time. By updating the optimal trajectories during the reconfiguration, the model predictive control algorithm results in decentralized computations and communication between neighboring spacecraft only. Additionally, model predictive control reduces the horizon of the convex optimizations, which reduces the run time of the algorithm.
C1 [Morgan, Daniel; Chung, Soon-Jo] Univ Illinois, Dept Aerosp Engn, Urbana, IL 61801 USA.
   [Hadaegh, Fred Y.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
RP Morgan, D (reprint author), Univ Illinois, Dept Aerosp Engn, Urbana, IL 61801 USA.
EM morgan29@illinois.edu; sjchung@illinois.edu; fred.y.hadaegh@jpl.nasa.gov
OI Chung, Soon-Jo/0000-0002-6657-3907
NR 28
TC 0
Z9 0
U1 1
U2 1
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 3835
EP 3854
PN I-IV
PG 20
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700219
ER

PT S
AU Klesh, AT
   Gustafson, ED
   Strange, N
   Wilcox, B
AF Klesh, Andrew T.
   Gustafson, Eric D.
   Strange, Nathan
   Wilcox, Brian
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI SIMULATION AND ANALYSIS OF A PHOBOS-ANCHORED TETHER
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
AB We investigate the dynamics and feasibility of a light-weight tether anchored to Phobos near Stickney crater. The tether is initially deployed along the Mars-Phobos line with its tip sitting beyond the Mars-Phobos L1 point. Such a tether could potentially provide a stable, low-gravity anchor point for human or robotic missions, or serve as an elevator for Phobos resources. Unfortunately trajectories near the L1 point are unstable, and there are proportionally large disturbance forces. We model the tether and simulate the evolution of its position to determine the feasibility and potential control needs of implementation.
C1 [Klesh, Andrew T.; Strange, Nathan] CALTECH, Planetary Mission Concepts, Jet Prop Lab, 4800 Oak Grove Blvd, Pasadena, CA 91101 USA.
   [Gustafson, Eric D.] CALTECH, Inner Planet Nav, Jet Prop Lab, Pasadena, CA 91101 USA.
   [Wilcox, Brian] CALTECH, Space Robot Technol, Autonomous Syst, Jet Prop Lab, Pasadena, CA 91101 USA.
RP Klesh, AT (reprint author), CALTECH, Planetary Mission Concepts, Jet Prop Lab, 4800 Oak Grove Blvd, Pasadena, CA 91101 USA.
NR 5
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 3895
EP 3902
PN I-IV
PG 8
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700222
ER

PT S
AU Landau, D
AF Landau, Damon
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI ORBITAL TRANSFER TECHNIQUES FOR ROUND-TRIP MARS MISSIONS
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
AB The human exploration of Phobos and Deimos or the retrieval of a surface sample launched to low-Mars orbit presents a highly constrained orbital transfer problem. In general, the plane of the target orbit will not be accessible from the arrival or departure interplanetary trajectories with an (energetically optimal) tangential burn at periapsis. The orbital design is further complicated by the addition of a high-energy parking orbit for the relatively massive Deep Space Vehicle to reduce propellant expenditure, while the crew transfers to and from the target orbit in a smaller Space Exploration Vehicle. The proposed strategy shifts the arrival and departure maneuvers away from periapsis so that the apsidal line of the parking orbit lies in the plane of the target orbit, permitting highly efficient plane change maneuvers at apoapsis of the elliptical parking orbit. An apsidal shift during the arrival or departure maneuver is approximately five times as efficient as maneuvering while in Mars orbit, thus significantly reducing the propellant necessary to transfer between the arrival, target, and departure orbits.
C1 [Landau, Damon] CALTECH, Mission Design & Nav Sect, Jet Prop Lab, 4800 Oak Grove Dr,M-S 301-121, Pasadena, CA 91109 USA.
RP Landau, D (reprint author), CALTECH, Mission Design & Nav Sect, Jet Prop Lab, 4800 Oak Grove Dr,M-S 301-121, Pasadena, CA 91109 USA.
NR 8
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 3947
EP 3962
PN I-IV
PG 16
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700226
ER

PT S
AU Vincent, MA
   Garcia, MD
AF Vincent, Mark A.
   Garcia, Mark D.
BE Tanygin, S
   Park, RS
   Starchville, TF
   Newman, LK
TI THE PLANS FOR GETTING OCO-2 INTO ORBIT
SO SPACEFLIGHT MECHANICS 2013, PTS I-IV
SE Advances in the Astronautical Sciences
LA English
DT Proceedings Paper
CT 23rd AAS/AIAA Space Flight Mechanics Meeting
CY FEB 10-14, 2013
CL Kauai, HI
SP Amer Astronaut Soc, Space Flight Mech Tech Comm, Amer Inst Aeronaut & Astronaut, Astrodynam Tech Comm, Anal Graph Inc
AB The method and terms used to design the target parameters that will be used to insert the Orbiting Carbon Observatory 2 (OCO-2) into the A-train are defined. Comparisons are made to the plan that would have been used had OCO-1 successfully achieved its Injection Orbit. Major differences arise from the fact that OCO-1 was launched on a Taurus XL with a target 65 km below the A-Train while OCO-2 will be launched on a Delta II with a target only 15 km below the A-Train. The new plan is similar to the one used for the CloudSat/CALIPSO missions, but reformulated into a one-step iteration process that is easier to understand.
C1 [Vincent, Mark A.] Raytheon, Nav & Mission Design, 299 N Euclid Ave Suite 500, Pasadena, CA 91101 USA.
   [Garcia, Mark D.] CALTECH, Mission Design & Nav Sect, Jet Prop Lab, Pasadena, CA 91109 USA.
RP Vincent, MA (reprint author), Raytheon, Nav & Mission Design, 299 N Euclid Ave Suite 500, Pasadena, CA 91101 USA.
NR 4
TC 0
Z9 0
U1 0
U2 0
PU UNIVELT INC
PI SAN DIEGO
PA PO BOX 28130, SAN DIEGO, CA 92128 USA
SN 1081-6003
BN 978-0-87703-597-8
J9 ADV ASTRONAUT SCI
PY 2013
VL 148
BP 3983
EP 3996
PN I-IV
PG 14
WC Engineering, Aerospace
SC Engineering
GA BE9KW
UT WOS:000377723700228
ER

PT J
AU BenDor, T
   Westervelt, J
   Song, Y
   Sexton, JO
AF BenDor, Todd
   Westervelt, James
   Song, Yan
   Sexton, Joseph O.
TI Modeling park development through regional land use change simulation
SO LAND USE POLICY
LA English
DT Article
DE Regional Urban Growth (RUG) model; Park and recreation planning; Urban
   open space; Level of service; Urban service provision; Urban growth
   modeling
ID OPEN SPACE; URBAN; LOCATION
AB Provision of recreational open space is a major factor in determining resident quality of life in cities. However, urban growth and land use change models typically omit park location and allocation issues when simulating changing urban environments. This paper introduces a method for exploring the spatial allocation of urban parks (public, recreational open spaces) given differing municipal and county investment decisions. Park planning literature has established level of service metrics as rough indicators of provision of public park amenities that are useful guides for future park investment decisions within a given jurisdiction. In this study, we create a dynamic-demand location model that simulates political feedback from population growth and LOS metrics to allocate new parklands (similar to 0.5 ha <= neighborhood parks <= similar to 4 ha) in multi-jurisdictional urbanizing regions. We frame parks as a new development type that augments residential development currently driving a version of the Regional Urban Growth (RUG) urban simulation model, an open source, raster-based simulation platform. Our approach allows planners and researchers to explore urban patterns and distributive outcomes associated with different local open space requirements and investment choices. We illustrate this approach under scenarios for the rapidly growing, three-county Raleigh-Durham-Chapel Hill region of North Carolina, USA. We test varying delays in park planning, purchase, and construction, varying maximum park sizes, and the effects of increased investment levels in two jurisdictions within our study area. This model suggests that the most important aspect of successful park planning is the length of the lag time between residential and park development. Perhaps the most successful park planning strategy is to plan parks along with residential areas. (C) 2012 Elsevier Ltd. All rights reserved.
C1 [BenDor, Todd; Song, Yan] Univ N Carolina, Dept City & Reg Planning, Chapel Hill, NC 27599 USA.
   [Westervelt, James] USA, Engineer Res & Dev Ctr, Construct Engn Res Lab, Champaign, IL 61826 USA.
   [Sexton, Joseph O.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
RP BenDor, T (reprint author), Univ N Carolina, Dept City & Reg Planning, New E Bldg,CB 3140, Chapel Hill, NC 27599 USA.
EM bendor@unc.edu; james.d.westervelt@ERDC.usace.army.mil
RI BenDor, Todd/E-1375-2016
OI BenDor, Todd/0000-0003-0132-7702
NR 65
TC 9
Z9 9
U1 4
U2 50
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0264-8377
EI 1873-5754
J9 LAND USE POLICY
JI Land Use Pol.
PD JAN
PY 2013
VL 30
IS 1
BP 1
EP 12
DI 10.1016/j.landusepol.2012.01.012
PG 12
WC Environmental Studies
SC Environmental Sciences & Ecology
GA 038SC
UT WOS:000311193400001
ER

PT J
AU Chen, W
   Yan, L
   Li, ZQ
   Jing, X
   Duan, YN
   Xiong, XX
AF Chen, Wei
   Yan, Lei
   Li, Zhanqing
   Jing, Xin
   Duan, Yini
   Xiong, Xiaoxiong
TI In-flight absolute calibration of an airborne wide-view multispectral
   imager using a reflectance-based method and its validation
SO INTERNATIONAL JOURNAL OF REMOTE SENSING
LA English
DT Article
ID RADIOMETRIC CALIBRATION; SENSORS
AB The wide-view multispectral imager (WVMI) is the main instrument carried on an unmanned vehicle in the Unmanned Vehicle Payloads Comprehensive Calibration Campaign, which focuses on the calibration and validation of various remote-sensing sensors, including multispectral and hyperspectral sensors. In order to calibrate the WVMI, we designed and deployed a set of six radiometric calibration targets with nominal reflectances of 4%, 20%, 30%, 40%, 50%, and 60% and a set of four radiometric validation targets, the reflectance spectra of which vary dramatically with wavelength. The results reveal a good linear relationship between the digital number (DN) of each sensor and the apparent radiances. Further analysis of data from the validation targets reveals that both spectral unevenness and low reflectance will lead to incurrence of errors in calculations using the calibration equation. This suggests a potential problem that needs to be addressed in the remote sensing of vegetation.
C1 [Chen, Wei; Li, Zhanqing] Univ Maryland, Earth Syst Sci Interdisciplinary Ctr, College Pk, MD 20740 USA.
   [Chen, Wei; Yan, Lei; Jing, Xin; Duan, Yini] Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China.
   [Chen, Wei; Yan, Lei; Jing, Xin; Duan, Yini] Peking Univ, Inst RS & GIS, Beijing 100871, Peoples R China.
   [Chen, Wei; Yan, Lei; Jing, Xin; Duan, Yini] Peking Univ, Beijing Key Lab Spatial Informat Integrat & Appli, Beijing 100871, Peoples R China.
   [Xiong, Xiaoxiong] NASA, Goddard Space Flight Ctr, Biospher Sci Lab, Greenbelt, MD 20771 USA.
RP Li, ZQ (reprint author), Beijing Normal Univ, GCESS, State Key Lab Earth Surface Proc & Resource Ecol, Beijing 100875, Peoples R China.
EM zli@atmos.umd.edu
RI Li, Zhanqing/F-4424-2010
OI Li, Zhanqing/0000-0001-6737-382X
FU China Scholarship Council; 863 project of UAV Sensor Calibration Test
   [2008AA121806]
FX This research is funded by the China Scholarship Council and a 863
   project of UAV Sensor Calibration Test under contract 2008AA121806.
NR 17
TC 4
Z9 5
U1 1
U2 20
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 0143-1161
J9 INT J REMOTE SENS
JI Int. J. Remote Sens.
PY 2013
VL 34
IS 6
BP 1995
EP 2005
DI 10.1080/01431161.2012.730160
PG 11
WC Remote Sensing; Imaging Science & Photographic Technology
SC Remote Sensing; Imaging Science & Photographic Technology
GA 043PU
UT WOS:000311557300008
ER

PT J
AU Shen, YF
   Krusienski, D
   Li, J
   Rahman, ZU
AF Shen, Yu-Fei
   Krusienski, Dean
   Li, Jiang
   Rahman, Zia-ur
TI A Hierarchical Horizon Detection Algorithm
SO IEEE GEOSCIENCE AND REMOTE SENSING LETTERS
LA English
DT Article
DE Horizon detection
AB A hierarchical elastic computer-aided detection algorithm is proposed to automatically detect the horizon in an aerial image. A hierarchical strategy, including coarse-level detection and fine-level adjustment, is applied. First, the original image is blurred by a large-scale low-pass filter. Then, a Canny edge detector and Hough transform are successively utilized to find major edges in the image and identify lines associated with those major edges. The desired horizon is modeled by the resulting line that best satisfies certain criteria. By doing so, the general position of the horizon can be quickly detected at the coarse-level step. Since the horizon is often not a straight line, an elastic fine-level adjustment is applied to capture the precise curvature of the horizon. A quantitative performance metric is designed, and preliminary experimental results show the feasibility and reliability of the proposed algorithm.
C1 [Shen, Yu-Fei; Krusienski, Dean; Li, Jiang] Old Dominion Univ, Dept Elect & Comp Engn, Norfolk, VA 23529 USA.
   [Rahman, Zia-ur] NASA, Electromagnet & Sensors Branch, Langley Res Ctr, Hampton, VA 23681 USA.
RP Shen, YF (reprint author), Old Dominion Univ, Dept Elect & Comp Engn, Norfolk, VA 23529 USA.
EM yshen002@odu.edu; dkrusien@odu.edu; jli@odu.edu
FU NASA Cooperative Agreement [NNL07AA02A]; Old Dominion University
FX This work was supported by the National Aeronautics and Space
   Administration (NASA) Aviation Safety Program under NASA Cooperative
   Agreement NNL07AA02A with Old Dominion University.
NR 10
TC 4
Z9 4
U1 0
U2 10
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 1545-598X
J9 IEEE GEOSCI REMOTE S
JI IEEE Geosci. Remote Sens. Lett.
PD JAN
PY 2013
VL 10
IS 1
BP 111
EP 114
DI 10.1109/LGRS.2012.2194473
PG 4
WC Geochemistry & Geophysics; Engineering, Electrical & Electronic; Remote
   Sensing; Imaging Science & Photographic Technology
SC Geochemistry & Geophysics; Engineering; Remote Sensing; Imaging Science
   & Photographic Technology
GA 034UZ
UT WOS:000310899700023
ER

PT J
AU Zhou, DK
   Larar, AM
   Liu, X
   Smith, WL
   Strow, LL
AF Zhou, Daniel K.
   Larar, Allen M.
   Liu, Xu
   Smith, William L.
   Strow, L. Larrabee
TI Error consistency analysis scheme for infrared ultraspectral sounding
   retrieval error budget estimation
SO REMOTE SENSING LETTERS
LA English
DT Article
ID RADIATIVE-TRANSFER; VALIDATION; TEMPERATURE
AB Great effort has been devoted towards validating geophysical parameters retrieved from ultraspectral infrared radiances obtained from satellite remote sensors. An error consistency analysis scheme (ECAS), utilizing fast radiative transfer model (RTM) forward and inverse calculations, has been developed to estimate the error budget in terms of mean difference and standard deviation of error in both spectral radiance and retrieval domains. The retrieval error is assessed through ECAS without relying on other independent measurements such as radiosonde data. ECAS establishes a link between the accuracies of radiances and retrieved geophysical parameters. ECAS can be applied to measurements from any ultraspectral instrument and any retrieval scheme with its associated RTM. In this manuscript, ECAS is described and demonstrated with measurements from the MetOp-A satellite Infrared Atmospheric Sounding Interferometer (IASI). This scheme can be used together with other validation methodologies to give a more definitive characterization of the error and/or uncertainty of geophysical parameters retrieved from ultraspectral radiances observed from current and future satellite remote sensors such as IASI, the Atmospheric Infrared Sounder (AIRS), and the Cross-track Infrared Sounder (CrIS).
C1 [Zhou, Daniel K.; Larar, Allen M.; Liu, Xu] NASA, Langley Res Ctr, Hampton, VA 23693 USA.
   [Smith, William L.] Hampton Univ, Dept Atmospher & Planetary Sci, Hampton, VA 23668 USA.
   [Smith, William L.] Univ Wisconsin, Ctr Space Sci & Engn, Madison, WI 53706 USA.
   [Strow, L. Larrabee] Univ Maryland Baltimore Cty, Dept Phys, Baltimore, MD 21250 USA.
RP Zhou, DK (reprint author), NASA, Langley Res Ctr, Hampton, VA 23693 USA.
EM daniel.k.zhou@nasa.gov
FU NASA Langley Research Center; NASA Headquarters; NASA Headquarters
   Research Division
FX IASI L1C data are provided by the Unified Meteorological Archival and
   Retrieval Facility (UMARF) of EUMETSAT. The fast cloud radiative
   transfer model was provided by Dr. Ping Yang of Texas A&M University.
   This research is supported by NASA Langley Research Center and NASA
   Headquarters. We would like to acknowledge support from NASA
   Headquarters Research Division Director Dr. Jack Kaye, and to extend our
   appreciation to the anonymous reviewers for their suggestions.
NR 11
TC 3
Z9 3
U1 0
U2 13
PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 2150-704X
J9 REMOTE SENS LETT
JI Remote Sens. Lett.
PY 2013
VL 4
IS 3
BP 219
EP 227
DI 10.1080/2150704X.2012.720394
PG 9
WC Remote Sensing; Imaging Science & Photographic Technology
SC Remote Sensing; Imaging Science & Photographic Technology
GA 037PM
UT WOS:000311119000002
ER

PT J
AU Stockton, AM
   Mora, MF
   Cable, ML
   Davenport, TC
   Tilley, TD
   Willis, PA
AF Stockton, Amanda M.
   Mora, Maria F.
   Cable, Morgan L.
   Davenport, Timothy C.
   Tilley, T. Don
   Willis, Peter A.
TI Hydrolysis of 3-carboxy-6,8-difluoro-7-hydroxycoumarin (Pacific Blue
   (TM)) succinimidyl ester under acidic and basic conditions
SO DYES AND PIGMENTS
LA English
DT Article
DE Microfabrication; Amino acid analysis; Extraterrestrial exploration;
   Succinimidyl ester hydrolysis; Microchip capillary electrophoresis;
   Laser induced fluorescence
ID MARS ORGANIC ANALYZER
AB The highly sensitive technique of microchip capillary electrophoresis (mu CE) with laser-induced fluorescence (LIF) detection is under development for future in situ spaceflight missions to search for the organic chemical signatures of life. One fluorescent probe that enables this technology for amine, amino acid, and dipeptide analysis is 3-carboxy-6,8-difluoro-7-hydroxycoumarin (Pacific Blue (TM), PB) succinimidyl ester. Of particular importance is the hydrolysis of PB succinimidyl ester, which precludes long-term aqueous storage during spaceflight and therefore has a significant impact on instrument design and operation. As such, it is important to characterize the chemical stability of this dye to hydrolysis prior to spaceflight. Here, we study the hydrolysis kinetics of the PB succinimidyl ester at pH values between 3 and 10.5 using mu CE-LIF. The PB succinimidyl ester has the longest lifetime at pH 4 (7.3 +/- 0.1 h), with dramatically shorter half-lives in the basic pH regime. This work represents a first step in the full characterization of this fluorescent probe for spaceflight applications. (C) 2012 Elsevier Ltd. All rights reserved.
C1 [Stockton, Amanda M.; Mora, Maria F.; Cable, Morgan L.; Willis, Peter A.] CALTECH, Jet Prop Lab, Pasadena, CA 91009 USA.
   [Davenport, Timothy C.; Tilley, T. Don] Univ Calif Berkeley, Coll Chem, Berkeley, CA 94720 USA.
RP Willis, PA (reprint author), CALTECH, Jet Prop Lab, Pasadena, CA 91009 USA.
EM willis@jpl.nasa.gov
RI Mora, Maria/C-9753-2009; Willis, Peter/I-6621-2012
FU National Aeronautics and Space Administration; University of California,
   Berkeley; NASA's Astrobiology Science and Technology Instrument
   Development (ASTID) program [104320]; Office of Energy Research, Office
   of Basic Energy Sciences, Chemical Sciences Division of the U.S.
   Department of Energy [DE-AC02-05CH11231]; NASA Postdoctoral Program
   (NPP) at the Jet Propulsion Laboratory; NASA; Copyright 2012 California
   Institute of Technology. Government sponsorship
FX The research described in this paper was carried out at the Jet
   Propulsion Laboratory, California Institute of Technology, under a
   contract with the National Aeronautics and Space Administration, and at
   the University of California, Berkeley. Financial support for this
   project was provided by NASA's Astrobiology Science and Technology
   Instrument Development (ASTID) program (Project #104320). Work at UC
   Berkeley was supported by the Director, Office of Energy Research,
   Office of Basic Energy Sciences, Chemical Sciences Division of the U.S.
   Department of Energy under contract DE-AC02-05CH11231. Financial support
   for A. Stockton and M. Cable was provided by the NASA Postdoctoral
   Program (NPP) at the Jet Propulsion Laboratory, administered by Oak
   Ridge Associated Universities through a contract with NASA. We thank Dr.
   Adrian Ponce at the Jet Propulsion Laboratory for the use of a Cary-50
   Spectrophotometer and Tony lavarone for assistance with mass
   spectrometry.; Copyright 2012 California Institute of Technology.
   Government sponsorship acknowledged.
NR 14
TC 0
Z9 0
U1 1
U2 18
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0143-7208
J9 DYES PIGMENTS
JI Dyes Pigment.
PD JAN
PY 2013
VL 96
IS 1
BP 148
EP 151
DI 10.1016/j.dyepig.2012.08.005
PG 4
WC Chemistry, Applied; Engineering, Chemical; Materials Science, Textiles
SC Chemistry; Engineering; Materials Science
GA 028FV
UT WOS:000310409100020
ER

PT J
AU Fatoyinbo, TE
   Simard, M
AF Fatoyinbo, Temilola E.
   Simard, Marc
TI Height and biomass of mangroves in Africa from ICESat/GLAS and SRTM
SO INTERNATIONAL JOURNAL OF REMOTE SENSING
LA English
DT Article
ID RADAR TOPOGRAPHY MISSION; ELEVATION DATA; FORESTS; VEGETATION; TROPICS;
   IMAGERY; KENYA; FIELD; LIDAR
AB The accurate quantification of the three-dimensional (3-D) structure of mangrove forests is of great importance, particularly in Africa where deforestation rates are high and the lack of background data is a major problem. The objectives of this study are to estimate (1) the total area, (2) canopy height distributions, and (3) above-ground biomass (AGB) of mangrove forests in Africa. To derive the 3-D structure and biomass maps of mangroves, we used a combination of mangrove maps derived from Landsat Enhanced Thematic Mapper Plus (ETM+), lidar canopy height estimates from ICESat/GLAS (Ice, Cloud, and land Elevation Satellite/Geoscience Laser Altimeter System), and elevation data from SRTM (Shuttle Radar Topography Mission) for the African continent. The lidar measurements from the large footprint GLAS sensor were used to derive local estimates of canopy height and calibrate the interferometric synthetic aperture radar (InSAR) data from SRTM. We then applied allometric equations relating canopy height to biomass in order to estimate AGB from the canopy height product. The total mangrove area of Africa was estimated to be 25,960 km(2) with 83% accuracy. The largest mangrove areas and the greatest total biomass were found in Nigeria covering 8573 km(2) with 132 x 10(6) Mg AGB. Canopy height across Africa was estimated with an overall root mean square error of 3.55 m. This error includes the impact of using sensors with different resolutions and geolocation error. This study provides the first systematic estimates of mangrove area, height, and biomass in Africa.
C1 [Fatoyinbo, Temilola E.] NASA, Goddard Space Flight Ctr, Biospher Sci Lab, Greenbelt, MD 20771 USA.
   [Simard, Marc] CALTECH, Jet Prop Lab, Pasadena, CA USA.
RP Fatoyinbo, TE (reprint author), NASA, Goddard Space Flight Ctr, Biospher Sci Lab, Greenbelt, MD 20771 USA.
EM lola.fatoyinbo@nasa.gov
RI Simard, Marc/H-3516-2013; chen, zhu/K-5923-2013; Fatoyinbo,
   Temilola/G-6104-2012
OI Simard, Marc/0000-0002-9442-4562; Fatoyinbo,
   Temilola/0000-0002-1130-6748
FU National Aeronautics and Space Administration (NASA)
FX Dr Fatoyinbo would like to thank the National Aeronautics and Space
   Administration (NASA) Postdoctoral Program for funding this research.
   The work presented in this article was conducted at the Jet Propulsion
   Laboratory, California Institute of Technology, under contract with
   NASA, and at the NASA Goddard Space Flight Center.
NR 47
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PU TAYLOR & FRANCIS LTD
PI ABINGDON
PA 4 PARK SQUARE, MILTON PARK, ABINGDON OX14 4RN, OXON, ENGLAND
SN 0143-1161
EI 1366-5901
J9 INT J REMOTE SENS
JI Int. J. Remote Sens.
PY 2013
VL 34
IS 2
BP 668
EP 681
DI 10.1080/01431161.2012.712224
PG 14
WC Remote Sensing; Imaging Science & Photographic Technology
SC Remote Sensing; Imaging Science & Photographic Technology
GA 008ZT
UT WOS:000308995800016
ER

PT J
AU Baumgartel, LM
   Thompson, RJ
   Yu, N
AF Baumgartel, L. M.
   Thompson, R. J.
   Yu, N.
TI Frequency stability of a dual-mode whispering gallery mode optical
   reference cavity
SO OPTICS EXPRESS
LA English
DT Article
ID RESONATOR; STABILIZATION; LASER
AB We report an investigation of laser frequency stabilization using a whispering gallery mode resonator that is temperature stabilized by a dual-mode technique. This dual-mode technique has yielded mode volume temperature instabilities at the nK level, suggesting that high frequency stability may also be reached. Here, we experimentally and theoretically investigate the dynamics of such a system and the important factors affecting the achievable frequency stability. We calculate that the dual-mode technique can reduce the effective fractional temperature coefficient of the reference system to 3.6x10(-8) K-1 within the temperature feedback bandwidth. We demonstrate a 1560 nm laser stabilized to 1.3x10(-12) at 1 s and 1.1x10(-10) at 1000 s, corresponding to a long-term drift of 21 kHz/hr. (C) 2012 Optical Society of America
C1 [Baumgartel, L. M.; Thompson, R. J.; Yu, N.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
   [Baumgartel, L. M.] Univ So Calif, Dept Phys & Astron, Los Angeles, CA 90089 USA.
RP Baumgartel, LM (reprint author), CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
EM nan.yu@jpl.nasa.gov
FU NASA
FX This work was carried out at Jet Propulsion Laboratory, California
   Institute of Technology, under contract from NASA. The authors thank D.
   Strekalov, I.S. Grudinin, and D. Aveline for discussions and
   contributions to the experimental setup.
NR 17
TC 11
Z9 11
U1 2
U2 24
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1094-4087
J9 OPT EXPRESS
JI Opt. Express
PD DEC 31
PY 2012
VL 20
IS 28
BP 29798
EP 29806
DI 10.1364/OE.20.029798
PG 9
WC Optics
SC Optics
GA 089MK
UT WOS:000314914500070
PM 23388807
ER

PT J
AU Narita, N
   Takahashi, YH
   Kuzuhara, M
   Hirano, T
   Suenaga, T
   Kandori, R
   Kuo, T
   Sato, B
   Suzuki, R
   Ida, S
   Nagasawa, M
   Abe, L
   Brandner, W
   Brandt, TD
   Carson, J
   Egner, SE
   Feldt, M
   Goto, M
   Grady, CA
   Guyon, O
   Hashimoto, J
   Hayano, Y
   Hayashi, M
   Hayashi, SS
   Henning, T
   Hodapp, KW
   Ishii, M
   Iye, M
   Janson, M
   Knapp, GR
   Kusakabe, N
   Kwon, J
   Matsu, T
   Mayama, S
   McElwain, MW
   Miyama, SM
   Morino, JI
   Moro-Martin, A
   Nishimura, T
   Pyo, TS
   Serabyn, E
   Suto, H
   Takami, M
   Takato, N
   Terada, H
   Thalmann, C
   Tomono, D
   Turner, EL
   Watanabe, M
   Wisniewski, JP
   Yamada, T
   Takami, H
   Usuda, T
   Tamura, M
AF Narita, Norio
   Takahashi, Yasuhiro H.
   Kuzuhara, Masayuki
   Hirano, Teruyuki
   Suenaga, Takuya
   Kandori, Ryo
   Kuo, Tomoyuki
   Sato, Bun'ei
   Suzuki, Ryuji
   Ida, Shigeru
   Nagasawa, Makiko
   Abe, Lyu
   Brandner, Wolfgang
   Brandt, Timothy D.
   Carson, Joseph
   Egner, Sebastian E.
   Feldt, Markus
   Goto, Miwa
   Grady, Carol A.
   Guyon, Olivier
   Hashimoto, Jun
   Hayano, Yutaka
   Hayashi, Masahiko
   Hayashi, Saeko S.
   Henning, Thomas
   Hodapp, Klaus W.
   Ishii, Miki
   Iye, Masanori
   Janson, Markus
   Knapp, Gillian R.
   Kusakabe, Nobuhiko
   Kwon, Jungmi
   Matsu, Taro
   Mayama, Satoshi
   McElwain, Michael W.
   Miyama, Shoken M.
   Morino, Jun-Ichi
   Moro-Martin, Amaya
   Nishimura, Tetsuo
   Pyo, Tae-Soo
   Serabyn, Eugene
   Suto, Hiroshi
   Takami, Michihiro
   Takato, Naruhisa
   Terada, Hiroshi
   Thalmann, Christian
   Tomono, Daigo
   Turner, Edwin L.
   Watanabe, Makoto
   Wisniewski, John P.
   Yamada, Toru
   Takami, Hideki
   Usuda, Tomonori
   Tamura, Motohide
TI A Common Proper Motion Stellar Companion to HAT-P-7
SO PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
LA English
DT Article
DE stars: binaries: general; stars: planetary systems: individual
   (HAT-P-7); techniques: high angular resolution; techniques: photometric;
   techniques: radial velocities
ID PLANETARY SYSTEMS; HOT JUPITERS; ORBITAL ECCENTRICITIES; SPIN-ORBIT;
   STARS; BINARY; MULTIPLICITY; OBLIQUITIES; POPULATIONS; RETROGRADE
AB We report that HAT-P-7 has a common proper motion stellar companion. The companion is located at similar to 3.'' 9 to the east and estimated to be an M5.5V dwarf based on its colors. We also confirm the presence of a third companion, which was first reported by Winn et al. (2009, ApJ, 703, L99), based on long-term radial velocity measurements. We revisit the migration mechanism of HAT-P-7b given to the presence of those companions, and propose the sequential Kozai migration as a likely scenario in this system. This scenario may explain the reason for an outlier in the discussion of the spin-orbit alignment timescale for HAT-P-7b by Albrecht et al. (2012, ApJ, 757, 18).
C1 [Narita, Norio; Takahashi, Yasuhiro H.; Kuzuhara, Masayuki; Kandori, Ryo; Suzuki, Ryuji; Hashimoto, Jun; Hayashi, Masahiko; Iye, Masanori; Kusakabe, Nobuhiko; Morino, Jun-Ichi; Suto, Hiroshi; Takami, Hideki; Tamura, Motohide] Natl Astron Observ Japan, Mitaka, Tokyo 1818588, Japan.
   [Takahashi, Yasuhiro H.] Univ Tokyo, Dept Astron, Bunkyo Ku, Tokyo 1130033, Japan.
   [Kuzuhara, Masayuki] Univ Tokyo, Dept Earth & Planetary Sci, Bunkyo Ku, Tokyo 1130033, Japan.
   [Hirano, Teruyuki] Univ Tokyo, Dept Phys, Bunkyo Ku, Tokyo 1130033, Japan.
   [Suenaga, Takuya; Kwon, Jungmi; Mayama, Satoshi] Grad Univ Adv Studies, Mitaka, Tokyo 1818588, Japan.
   [Kuo, Tomoyuki; Egner, Sebastian E.; Guyon, Olivier; Hayano, Yutaka; Hayashi, Saeko S.; Ishii, Miki; Nishimura, Tetsuo; Pyo, Tae-Soo; Takato, Naruhisa; Terada, Hiroshi; Tomono, Daigo; Usuda, Tomonori] Natl Astron Observ Japan, Subaru Telescope, Hilo, HI 96720 USA.
   [Sato, Bun'ei; Ida, Shigeru; Nagasawa, Makiko] Tokyo Inst Technol, Dept Earth & Planetary Sci, Meguro Ku, Tokyo 1528551, Japan.
   [Abe, Lyu] Univ Nice Sophia Antipolis, Lab Lagrange, UMR 7293, CNRS,Observ Cote Azur, F-06108 Nice 2, France.
   [Brandner, Wolfgang; Feldt, Markus; Henning, Thomas] Max Planck Inst Astron, D-69117 Heidelberg, Germany.
   [Brandt, Timothy D.; Knapp, Gillian R.] Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA.
   [Carson, Joseph] Coll Charleston, Dept Phys & Astron, Charleston, SC 29424 USA.
   [Goto, Miwa] Univ Munich, Univ Sternwarte Munchen, D-81679 Munich, Germany.
   [Grady, Carol A.; McElwain, Michael W.] NASA, Goddard Space Flight Ctr, Exoplanets & Stellar Astrophys Lab, Greenbelt, MD 20771 USA.
   [Hodapp, Klaus W.] Univ Hawaii, Inst Astron, Hilo, HI 96720 USA.
   [Matsu, Taro] Kyoto Univ, Dept Astron, Sakyo Ku, Kyoto 6068502, Japan.
   [Miyama, Shoken M.] Hiroshima Univ, Hiroshima 7398511, Japan.
   [Moro-Martin, Amaya] CAB CSIC INTA, Dept Astrophys, Madrid 28850, Spain.
   [Serabyn, Eugene] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
   [Takami, Michihiro] Acad Sinica, Inst Astron & Astrophys, Taipei 10617, Taiwan.
   [Thalmann, Christian] Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1090 GE Amsterdam, Netherlands.
   [Turner, Edwin L.] Univ Tokyo, Kavli Inst Phys & Math Universe, Kashiwa, Chiba 2778568, Japan.
   [Watanabe, Makoto] Hokkaido Univ, Dept Cosmosci, Kita Ku, Sapporo, Hokkaido 0600810, Japan.
   [Wisniewski, John P.] Univ Oklahoma, HL Dodge Dept Phys & Astron, Norman, OK 73019 USA.
   [Yamada, Toru] Tohoku Univ, Astron Inst, Aoba Ku, Sendai, Miyagi 9808578, Japan.
RP Narita, N (reprint author), Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan.
EM norio.narita@nao.ac.jp
RI Ida, Shigeru/A-7840-2014; MIYAMA, Shoken/A-3598-2015; Watanabe,
   Makoto/E-3667-2016
OI Ida, Shigeru/0000-0002-9676-3891; Watanabe, Makoto/0000-0002-3656-4081
FU NAOJ Fellowship; NINS Program; JSPS [23840046, DC1: 22-5935, 23-271];
   Ministry of Education, Culture, Sports, Science and Technology (MEXT)
   [22000005]; National Science Foundation [AST-1009203]; Mitsubishi
   Foundation
FX This paper is based on data collected at Subaru Telescope, which is
   operated by the National Astronomical Observatory of Japan (NAOJ). This
   research has benefitted from the SpeX Prism Spectral Libraries,
   maintained by Adam Burgasser at (http://pono.ucsd.edu/
   radam/browndwarfs/spexprism). We are grateful to the referee, Dr. Simon
   Albrecht, for insightful suggestions. NN acknowledges supports by NAOJ
   Fellowship, NINS Program for Cross-Disciplinary Study, and Japan Society
   for the Promotion of Science (JSPS) Grant-in-Aid for Research Activity
   Start-up No. 23840046. This work is partly supported by JSPS Fellowships
   for Research (DC1: 22-5935, 23-271), a Grant-in-Aid for Specially
   Promoted Research, No. 22000005 from the Ministry of Education, Culture,
   Sports, Science and Technology (MEXT), grant AST-1009203 from the
   National Science Foundation, and the Mitsubishi Foundation. Part of this
   research was carried out at the Jet Propulsion Laboratory, California
   Institute of Technology, under a contract with the National Aeronautics
   and Space Administration.
NR 27
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PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0004-6264
EI 2053-051X
J9 PUBL ASTRON SOC JPN
JI Publ. Astron. Soc. Jpn.
PD DEC 25
PY 2012
VL 64
IS 6
AR L7
DI 10.1093/pasj/64.6.L7
PG 5
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 065KR
UT WOS:000313147700002
ER

PT J
AU Tanii, R
   Itoh, Y
   Kudo, T
   Hioki, T
   Oasa, Y
   Gupta, R
   Sen, AK
   Wisniewski, JP
   Muto, T
   Grady, CA
   Hashimoto, J
   Fukagawa, M
   Mayama, S
   Hornbeck, J
   Sitko, ML
   Russell, RW
   Werren, C
   Cure, M
   Currie, T
   Ohashi, N
   Okamoto, Y
   Momose, M
   Honda, M
   Inutsura, SI
   Takeuchi, T
   Dong, RB
   Abe, L
   Brandner, W
   Brandt, TD
   Carson, J
   Egner, SE
   Feldt, M
   Fukue, T
   Goto, M
   Guyon, O
   Hayano, Y
   Hayashi, M
   Hayashi, SS
   Henning, T
   Hodapp, KW
   Ishii, M
   Iye, M
   Janson, M
   Kandori, R
   Knapp, GR
   Kusakabe, N
   Kuzuhara, M
   Matsuo, T
   McElwain, MW
   Miyama, S
   Morino, J
   Moro-Martin, A
   Nishimura, T
   Pyo, TS
   Serabyn, E
   Suto, H
   Suzuki, R
   Takami, M
   Takato, N
   Terada, H
   Thalmann, C
   Tomono, D
   Turner, EL
   Watanabe, M
   Yamada, T
   Takami, H
   Usuda, T
   Tamura, M
AF Tanii, Ryoko
   Itoh, Yoichi
   Kudo, Tomoyuki
   Hioki, Tomonori
   Oasa, Yumiko
   Gupta, Ranjan
   Sen, Asoke K.
   Wisniewski, John P.
   Muto, Takayuki
   Grady, Carol A.
   Hashimoto, Jun
   Fukagawa, Misato
   Mayama, Satoshi
   Hornbeck, Jeremy
   Sitko, Michael L.
   Russell, Ray W.
   Werren, Chelsea
   Cure, Michel
   Currie, Thayne
   Ohashi, Nagayoshi
   Okamoto, Yoshiko
   Momose, Munetake
   Honda, Mitsuhiko
   Inutsura, Shu-ichi
   Takeuchi, Taku
   Dong, Ruobing
   Abe, Lyu
   Brandner, Wolfgang
   Brandt, Timothy D.
   Carson, Joseph
   Egner, Sebastian E.
   Feldt, Markus
   Fukue, Tsubasa
   Goto, Miwa
   Guyon, Olivier
   Hayano, Yutaka
   Hayashi, Masahiko
   Hayashi, Saeko S.
   Henning, Thomas
   Hodapp, Klaus W.
   Ishii, Miki
   Iye, Masanori
   Janson, Markus
   Kandori, Ryo
   Knapp, Gillian R.
   Kusakabe, Nobuhiko
   Kuzuhara, Masayuki
   Matsuo, Taro
   McElwain, Michael W.
   Miyama, Shoken
   Morino, Jun-ichi
   Moro-Martin, Amaya
   Nishimura, Tetsuro
   Pyo, Tae-Soo
   Serabyn, Eugene
   Suto, Hiroshi
   Suzuki, Ryuji
   Takami, Michihiro
   Takato, Naruhisa
   Terada, Hiroshi
   Thalmann, Christian
   Tomono, Daigo
   Turner, Edwin L.
   Watanabe, Makoto
   Yamada, Toru
   Takami, Hideki
   Usuda, Tomonori
   Tamura, Motohide
TI High-Resolution Near-Infrared Polarimetry of a Circumstellar Disk around
   UX Tau A
SO PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
LA English
DT Article
DE (stars:) planetary systems: protoplanetary disk; techniques: high
   angular resolution; techniques: polarimetric
ID PRIMORDIAL SOLAR NEBULA; PROTOPLANETARY DISK; PRETRANSITIONAL DISKS;
   IMAGING POLARIMETRY; SPITZER IRS; AB-AURIGAE; DUST; PLANETESIMALS;
   EVOLUTION; GROWTH
AB We present H-band polarimetric imagery of UX Tau A taken with HiCIAO/AO188 on the Subaru Telescope. UX Tau A has been classified as a pre-transitional disk object, with a gap structure separating its inner and outer disks. Our imagery taken with the 0 ''.15 (21 AU) radius coronagraphic mask has revealed a strongly polarized circumstellar disk surrounding UX Tau A, which extends to 120 AU, at a spatial resolution of 0 ''.1 (14 AU). It is inclined by 46 degrees +/- 2 degrees, since the west side is nearest. Although SED modeling and sub-millimeter imagery have suggested the presence of a gap in the disk, with the inner edge of the outer disk estimated to be located at 25-30 AU, we detect no evidence of a gap at the limit of our inner working angle (23 AU) at the near-infrared wavelength. We attribute the observed strong polarization (up to 66%) to light scattering by dust grains in the disk. However, neither polarization models of the circumstellar disk based on Rayleigh-scattering nor Mie-scattering approximations were consistent with the observed azimuthal profile of the polarization degrees of the disk. Instead, a geometric optics model of the disk with nonspherical grains with radii of 30 mu m is consistent with the observed profile. We suggest that the dust grains have experienced frequent collisional coagulations, and have grown in the circumstellar disk of UX Tau A.
C1 [Tanii, Ryoko; Itoh, Yoichi; Hioki, Tomonori] Kobe Univ, Grad Sch Sci, Nada Ku, Kobe, Hyogo 6578501, Japan.
   [Kudo, Tomoyuki; Ohashi, Nagayoshi; Egner, Sebastian E.; Guyon, Olivier; Hayano, Yutaka; Hayashi, Saeko S.; Ishii, Miki; Nishimura, Tetsuro; Pyo, Tae-Soo; Takato, Naruhisa; Terada, Hiroshi; Tomono, Daigo; Takami, Hideki; Usuda, Tomonori] Natl Inst Nat Sci, Natl Astron Observ Japan, Subaru Telescope, Hilo, HI 96720 USA.
   [Oasa, Yumiko] Saitama Univ, Fac Educ, Sakura, Saitama 3380825, Japan.
   [Gupta, Ranjan] IUCAA, Pune 411007, Maharashtra, India.
   [Sen, Asoke K.] Assam Univ, Dept Phys, Silchar 788011, Assam, India.
   [Wisniewski, John P.] Univ Washington, Dept Astron, Seattle, WA 98195 USA.
   [Turner, Edwin L.] Univ Tokyo, Inst Phys & Math Universe, Kashiwa, Chiba 2278568, Japan.
   [Serabyn, Eugene] CALTECH, Jet Prop Lab, Pasadena, CA 91011 USA.
   [Grady, Carol A.] Eureka Scient, Oakland, CA 96002 USA.
   [Grady, Carol A.; Currie, Thayne] NASA, Goddard Space Flight Ctr, ExoPlanets & Stellar Astrophys Lab, Greenbelt, MD 20771 USA.
   [Grady, Carol A.] NASA, Goddard Space Flight Ctr, Goddard Ctr Astrobiol, Greenbelt, MD 20771 USA.
   [Hashimoto, Jun; Fukue, Tsubasa; Hayashi, Masahiko; Iye, Masanori; Kandori, Ryo; Kusakabe, Nobuhiko; Miyama, Shoken; Morino, Jun-ichi; Suto, Hiroshi; Suzuki, Ryuji; Tamura, Motohide] Natl Inst Nat Sci, Natl Astron Observ Japan, Mitaka, Tokyo 1818588, Japan.
   [Fukagawa, Misato] Osaka Univ, Dept Earth & Space Sci, Grad Sch Sci, Toyonaka, Osaka 5600043, Japan.
   [Mayama, Satoshi] Grad Univ Adv Studies SOKENDAI, Hayama, Kanagawa 2400193, Japan.
   [Hornbeck, Jeremy] Univ Louisville, Dept Phys & Astron, Louisville, KY 40292 USA.
   [Sitko, Michael L.] Space Sci Inst, Boulder, CO 80301 USA.
   [Sitko, Michael L.; Werren, Chelsea] Univ Cincinnati, Dept Phys, Cincinnati, OH 45221 USA.
   [Russell, Ray W.] Aerosp Corp, Los Angeles, CA 90009 USA.
   [Cure, Michel] Univ Valparaiso, Dept Fis & Astron, Fac Ciencias, Valparaiso, Chile.
   [Ohashi, Nagayoshi; Takami, Michihiro] Acad Sinica, Inst Astron & Astrophys, Taipei 106, Taiwan.
   [Okamoto, Yoshiko; Momose, Munetake] Ibaraki Univ, Fac Sci, Mito, Ibaraki 3108512, Japan.
   [Honda, Mitsuhiko] Kanagawa Univ, Dept Informat Sci, Hiratsuka, Kanagawa 2591293, Japan.
   [Inutsura, Shu-ichi] Nagoya Univ, Dept Phys, Chikusa Ku, Nagoya, Aichi 4648602, Japan.
   [Muto, Takayuki; Takeuchi, Taku] Tokyo Inst Technol, Meguro Ku, Tokyo 1528551, Japan.
   [Dong, Ruobing; Brandt, Timothy D.; Janson, Markus; Knapp, Gillian R.; McElwain, Michael W.; Turner, Edwin L.] Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA.
   [Abe, Lyu] Univ Nice Sophia Antipolis, Lab Hippolyte Fizeau, UMR6525, F-06108 Nice 02, France.
   [Brandner, Wolfgang; Feldt, Markus; Goto, Miwa; Henning, Thomas; Thalmann, Christian] Max Planck Inst Astron, D-69117 Heidelberg, Germany.
   [Carson, Joseph] Coll Charleston, Dept Phys & Astron, Charleston, SC 29424 USA.
   [Kuzuhara, Masayuki] Univ Tokyo, Dept Astron, Bunkyo Ku, Tokyo 1130033, Japan.
   [Hodapp, Klaus W.] Univ Hawaii, Inst Astron, Hilo, HI 96720 USA.
   [Matsuo, Taro] Kyoto Univ, Dept Astron, Sakyo Ku, Kyoto 6068502, Japan.
   [Moro-Martin, Amaya] Ctr Astrobiol, Dept Astrophys, Madrid 28850, Spain.
   [Watanabe, Makoto] Hokkaido Univ, Dept Cosmosci, Kita Ku, Sapporo, Hokkaido 0600810, Japan.
   [Yamada, Toru] Tohoku Univ, Inst Astron, Aoba Ku, Sendai, Miyagi 9808578, Japan.
RP Tanii, R (reprint author), Kobe Univ, Grad Sch Sci, Nada Ku, 1-1 Rokkodai Cho, Kobe, Hyogo 6578501, Japan.
EM tanii@stu.kobe-u.ac.jp
RI MIYAMA, Shoken/A-3598-2015; Takeuchi, Taku/F-1954-2015; Watanabe,
   Makoto/E-3667-2016
OI Watanabe, Makoto/0000-0002-3656-4081
FU JSPS-DST; Princeton University Global Collaborative Research Fund grant;
   World Premier International Research Center Initiative (WPI Initiative),
   MEXT, Japan; NSF [AST-1009203]
FX We thank the telescope staff members and operators at the Subaru
   Telescope. This work is partly supported by the JSPS-DST collaboration.
   E.L.T. gratefully acknowledges support from a Princeton University
   Global Collaborative Research Fund grant and the World Premier
   International Research Center Initiative (WPI Initiative), MEXT, Japan.
   J. Carson gratefully acknowledges support from NSF grant AST-1009203.
NR 41
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PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0004-6264
EI 2053-051X
J9 PUBL ASTRON SOC JPN
JI Publ. Astron. Soc. Jpn.
PD DEC 25
PY 2012
VL 64
IS 6
AR 124
DI 10.1093/pasj/64.6.124
PG 10
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 065KR
UT WOS:000313147700010
ER

PT J
AU Yi, BQ
   Yang, P
   Liou, KN
   Minnis, P
   Penner, JE
AF Yi, Bingqi
   Yang, Ping
   Liou, Kuo-Nan
   Minnis, Patrick
   Penner, Joyce E.
TI Simulation of the global contrail radiative forcing: A sensitivity
   analysis
SO GEOPHYSICAL RESEARCH LETTERS
LA English
DT Article
ID CLIMATE; CIRRUS; PARAMETERIZATION
AB The contrail radiative forcing induced by human aviation activity is one of the most uncertain contributions to climate forcing. An accurate estimation of global contrail radiative forcing is imperative, and the modeling approach is an effective and prominent method to investigate the sensitivity of contrail forcing to various potential factors. We use a simple offline model framework that is particularly useful for sensitivity studies. The most-up-to-date Community Atmospheric Model version 5 (CAM5) is employed to simulate the atmosphere and cloud conditions during the year 2006. With updated natural cirrus and additional contrail optical property parameterizations, the RRTMG Model (RRTM-GCM application) is used to simulate the global contrail radiative forcing. Global contrail coverage and optical depth derived from the literature for the year 2002 is used. The 2006 global annual averaged contrail net (short-wave + longwave) radiative forcing is estimated to be 11.3 mW m(-2). Regional contrail radiative forcing over dense air traffic areas can be more than ten times stronger than the global average. A series of sensitivity tests are implemented and show that contrail particle effective size, contrail layer height, the model cloud overlap assumption, and contrail optical properties are among the most important factors. The difference between the contrail forcing under all and clear skies is also shown. Citation: Yi, B., P. Yang, K.-N. Liou, P. Minnis, and J. E. Penner (2012), Simulation of the global contrail radiative forcing: A sensitivity analysis, Geophys. Res. Lett., 39, L00F03, doi: 10.1029/2012GL054042.
C1 [Yi, Bingqi; Yang, Ping] Texas A&M Univ, Dept Atmospher Sci, College Stn, TX 77843 USA.
   [Liou, Kuo-Nan] Univ Calif Los Angeles, Dept Atmospher & Ocean Sci, Los Angeles, CA USA.
   [Liou, Kuo-Nan] Univ Calif Los Angeles, Joint Inst Earth Syst Sci & Engn, Los Angeles, CA USA.
   [Minnis, Patrick] NASA, Sci Directorate, Langley Res Ctr, Hampton, VA USA.
   [Penner, Joyce E.] Univ Michigan, Dept Atmospher Ocean & Space Sci, Ann Arbor, MI 48109 USA.
RP Yang, P (reprint author), Texas A&M Univ, Dept Atmospher Sci, College Stn, TX 77843 USA.
EM pyang@tamu.edu
RI Yi, Bingqi/E-4076-2012; Yang, Ping/B-4590-2011; Penner,
   Joyce/J-1719-2012; Minnis, Patrick/G-1902-2010
OI Yi, Bingqi/0000-0002-1437-8376; Minnis, Patrick/0000-0002-4733-6148
FU Aviation Climate Change Research Initiative (ACCRI); Federal Aviation
   Administration (FAA) [DTRT57-10-C-10016, DTRT57-10-X-70020]
FX This work is supported by the Aviation Climate Change Research
   Initiative (ACCRI) sponsored by the Federal Aviation Administration
   (FAA) under contracts DTRT57-10-C-10016 and DTRT57-10-X-70020. The
   authors thank Drs. Rangasayi Halthore and S. Daniel Jacob from the FAA
   for overseeing the project progress and for guidance and encouragement.
   The Texas A&M Supercomputing Facility (http://sc.tamu.edu) provided
   computing resources for conducting the research reported in this paper.
NR 24
TC 10
Z9 10
U1 2
U2 12
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0094-8276
J9 GEOPHYS RES LETT
JI Geophys. Res. Lett.
PD DEC 22
PY 2012
VL 39
AR L00F03
DI 10.1029/2012GL054042
PG 5
WC Geosciences, Multidisciplinary
SC Geology
GA 061US
UT WOS:000312874600005
ER

PT J
AU Ajello, JM
   West, RA
   Gustin, J
   Larsen, K
   Stewart, AIF
   Esposito, LW
   McClintock, WE
   Holsclaw, GM
   Bradley, ET
AF Ajello, Joseph M.
   West, Robert A.
   Gustin, Jacques
   Larsen, Kristopher
   Stewart, A. Ian F.
   Esposito, Larry W.
   McClintock, William E.
   Holsclaw, Gregory M.
   Bradley, E. Todd
TI Cassini UVIS observations of Titan nightglow spectra
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
ID ELECTRON-IMPACT; ULTRAVIOLET EMISSION; CROSS-SECTIONS; MOLECULAR
   NITROGEN; N-2; RESOLUTION; ATMOSPHERE; DAYGLOW; DISSOCIATION; BAND
AB In this paper we present the first nightside EUV and FUV airglow limb spectra of Titan showing molecular emissions. The Cassini Ultraviolet Imaging Spectrograph (UVIS) observed photon emissions of Titan's day and night limb-airglow and disk-airglow on multiple occasions, including during an eclipse observation. The 71 airglow observations analyzed in this paper show EUV (600-1150 angstrom) and FUV (1150-1900 angstrom) atomic multiplet lines and band emissions arising from either photoelectron induced fluorescence and solar photo-fragmentation of molecular nitrogen (N-2) or excitation by magnetosphere plasma. The altitude of the peak UV emissions on the limb during daylight occurred inside the thermosphere at the altitude of the topside ionosphere (near 1000 km altitude). However, at night on the limb, a subset of emission features, much weaker in intensity, arise in the atmosphere with two different geometries. First, there is a twilight photoelectron-excited glow that persists with solar depression angle up to 25-30 degrees past the terminator, until the solar XUV shadow height passes the altitude of the topside ionosphere (1000-1200 km). The UV twilight glow spectrum is similar to the dayglow but weaker in intensity. Second, beyond 120 degrees solar zenith angle, when the upper atmosphere of Titan is in total XUV darkness, there is indication of weak and sporadic nightside UV airglow emissions excited by magnetosphere plasma collisions with ambient thermosphere gas, with similar N2 excited features as above in the daylight or twilight glow over an extended altitude range. Citation: Ajello, J. M., R. A. West, J. Gustin, K. Larsen, A. I. F. Stewart, L. W. Esposito, W. E. McClintock, G. M. Holsclaw, and E. T. Bradley (2012), Cassini UVIS observations of Titan nightglow spectra, J. Geophys. Res., 117, A12315, doi: 10.1029/2012JA017888.
C1 [Ajello, Joseph M.; West, Robert A.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
   [Gustin, Jacques] Univ Liege, Lab Phys Atmospher & Planetaire, Liege, Belgium.
   [Larsen, Kristopher; Stewart, A. Ian F.; Esposito, Larry W.; McClintock, William E.; Holsclaw, Gregory M.] Univ Colorado, Lab Atmospher & Space Phys, Boulder, CO 80309 USA.
   [Bradley, E. Todd] Univ Cent Florida, Dept Phys, Orlando, FL USA.
RP Ajello, JM (reprint author), CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
EM joseph.m.ajello@jpl.nasa.gov
FU Aeronautics and Space Administration (NASA); NASA; Geospace and
   Planetary Atmospheres programs; National Science Foundation;
   Astrophysics Research and Analysis Program Offices
FX This work was performed at the Jet Propulsion Laboratory (JPL),
   California Institute of Technology (Caltech), under a contract with the
   National Aeronautics and Space Administration (NASA). We gratefully
   acknowledge financial support through NASA's Cassini Data Analysis
   Program, Geospace and Planetary Atmospheres programs, the National
   Science Foundation, and the Astrophysics Research and Analysis Program
   Offices.
NR 58
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U1 0
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PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9380
EI 2169-9402
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD DEC 22
PY 2012
VL 117
AR A12315
DI 10.1029/2012JA017888
PG 28
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 061DR
UT WOS:000312827800001
ER

PT J
AU Korth, H
   Anderson, BJ
   Johnson, CL
   Winslow, RM
   Slavin, JA
   Purucker, ME
   Solomon, SC
   McNutt, RL
AF Korth, Haje
   Anderson, Brian J.
   Johnson, Catherine L.
   Winslow, Reka M.
   Slavin, James A.
   Purucker, Michael E.
   Solomon, Sean C.
   McNutt, Ralph L., Jr.
TI Characteristics of the plasma distribution in Mercury's equatorial
   magnetosphere derived from MESSENGER Magnetometer observations
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
ID INTERPLANETARY MAGNETIC-FIELD; PARTICLE MOTION; SHEET ACCESS;
   MAGNETOTAIL; INSTRUMENT; MISSION; IONS
AB Localized reductions in the magnetic field associated with plasma pressure in Mercury's magnetospheric cusp and nightside plasma sheet have been routinely observed by the Magnetometer on the MErcury Surface, Space ENvironment, GEochemistry and Ranging (MESSENGER) spacecraft. We present a statistical analysis of near-equatorial magnetic depressions to derive the structure of Mercury's plasma sheet pressure. Because the plasma pressure in the magnetosphere correlates with solar wind density, the pressures were normalized to a Mercury heliocentric distance of 0.39 AU. A model magnetic field was used to map observations obtained on the ascending and descending orbit nodes to the magnetic equator and revealed the presence of plasma in a toroidal section extending on the nightside from dusk to dawn. Mapping the data to invariant magnetic latitude shows that the pressure is symmetric about the magnetic equator. The average pressure normalized for heliocentric distance is 1.45 nPa and exhibits a weak, 0.05 nPa/h, dusk-to-dawn gradient with local time. The plasma sheet pressure can vary between successive orbits by an order of magnitude. Unlike the predictions of some global simulations of Mercury's magnetosphere, the plasma enhancements do not form a closed distribution around the planet. This difference may arise from the idealized solar wind and interplanetary magnetic field conditions used in the simulations, which maximize the size and stability of the magnetosphere, thus promoting the formation of drift paths that close around the planet. For typical plasma sheet energies, 5 keV, the first adiabatic invariant for protons fails to be conserved even within 500 km altitude at midnight, implying that stochastic processes must be considered in plasma sheet transport. Citation: Korth, H., B. J. Anderson, C. L. Johnson, R. M. Winslow, J. A. Slavin, M. E. Purucker, S. C. Solomon, and R. L. McNutt Jr. (2012), Characteristics of the plasma distribution in Mercury's equatorial magnetosphere derived from MESSENGER Magnetometer observations, J. Geophys. Res., 117, A00M07, doi: 10.1029/2012JA018052.
C1 [Korth, Haje; Anderson, Brian J.; McNutt, Ralph L., Jr.] Johns Hopkins Univ, Appl Phys Lab, Laurel, MD 20723 USA.
   [Johnson, Catherine L.] Planetary Sci Inst, Tucson, AZ USA.
   [Johnson, Catherine L.; Winslow, Reka M.] Univ British Columbia, Dept Earth Ocean & Atmospher Sci, Vancouver, BC V5Z 1M9, Canada.
   [Slavin, James A.] Univ Michigan, Dept Atmospher Ocean & Space Sci, Ann Arbor, MI 48109 USA.
   [Purucker, Michael E.] NASA, Goddard Space Flight Ctr, Solar Syst Explorat Div, Greenbelt, MD 20771 USA.
   [Solomon, Sean C.] Carnegie Inst Sci, Dept Terr Magnetism, Washington, DC 20015 USA.
   [Solomon, Sean C.] Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY USA.
RP Korth, H (reprint author), Johns Hopkins Univ, Appl Phys Lab, 11100 Johns Hopkins Rd, Laurel, MD 20723 USA.
EM haje.korth@jhuapl.edu
RI Slavin, James/H-3170-2012; McNutt, Ralph/E-8006-2010
OI Slavin, James/0000-0002-9206-724X; McNutt, Ralph/0000-0002-4722-9166
FU NASA [NAS5-97271, NASW-00002]; MESSENGER [NNX11AB84G, NNH08CC05C];
   Natural Sciences and Engineering Research Council of Canada
FX The MESSENGER project is supported by the NASA Discovery Program under
   contracts NAS5-97271 to The Johns Hopkins University Applied Physics
   Laboratory and NASW-00002 to the Carnegie Institution of Washington.
   C.L.J. and M. E. P. are supported by MESSENGER Participating Scientist
   grants NNX11AB84G and NNH08CC05C. R. M. W. and C.L.J. acknowledge
   support from the Natural Sciences and Engineering Research Council of
   Canada.
NR 36
TC 13
Z9 13
U1 0
U2 16
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9380
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD DEC 22
PY 2012
VL 117
AR A00M07
DI 10.1029/2012JA018052
PG 11
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 061DR
UT WOS:000312827800003
ER

PT J
AU Jenniskens, P
   Fries, MD
   Yin, QZ
   Zolensky, M
   Krot, AN
   Sandford, SA
   Sears, D
   Beauford, R
   Ebel, DS
   Friedrich, JM
   Nagashima, K
   Wimpenny, J
   Yamakawa, A
   Nishiizumi, K
   Hamajima, Y
   Caffee, MW
   Welten, KC
   Laubenstein, M
   Davis, AM
   Simon, SB
   Heck, PR
   Young, ED
   Kohl, IE
   Thiemens, MH
   Nunn, MH
   Mikouchi, T
   Hagiya, K
   Ohsumi, K
   Cahill, TA
   Lawton, JA
   Barnes, D
   Steele, A
   Rochette, P
   Verosub, KL
   Gattacceca, J
   Cooper, G
   Glavin, DP
   Burton, AS
   Dworkin, JP
   Elsila, JE
   Pizzarello, S
   Ogliore, R
   Schmitt-Kopplin, P
   Harir, M
   Hertkorn, N
   Verchovsky, A
   Grady, M
   Nagao, K
   Okazaki, R
   Takechi, H
   Hiroi, T
   Smith, K
   Silber, EA
   Brown, PG
   Albers, J
   Klotz, D
   Hankey, M
   Matson, R
   Fries, JA
   Walker, RJ
   Puchtel, I
   Lee, CTA
   Erdman, ME
   Eppich, GR
   Roeske, S
   Gabelica, Z
   Lerche, M
   Nuevo, M
   Girten, B
   Worden, SP
AF Jenniskens, Peter
   Fries, Marc D.
   Yin, Qing-Zhu
   Zolensky, Michael
   Krot, Alexander N.
   Sandford, Scott A.
   Sears, Derek
   Beauford, Robert
   Ebel, Denton S.
   Friedrich, Jon M.
   Nagashima, Kazuhide
   Wimpenny, Josh
   Yamakawa, Akane
   Nishiizumi, Kunihiko
   Hamajima, Yasunori
   Caffee, Marc W.
   Welten, Kees C.
   Laubenstein, Matthias
   Davis, Andrew M.
   Simon, Steven B.
   Heck, Philipp R.
   Young, Edward D.
   Kohl, Issaku E.
   Thiemens, Mark H.
   Nunn, Morgan H.
   Mikouchi, Takashi
   Hagiya, Kenji
   Ohsumi, Kazumasa
   Cahill, Thomas A.
   Lawton, Jonathan A.
   Barnes, David
   Steele, Andrew
   Rochette, Pierre
   Verosub, Kenneth L.
   Gattacceca, Jerome
   Cooper, George
   Glavin, Daniel P.
   Burton, Aaron S.
   Dworkin, Jason P.
   Elsila, Jamie E.
   Pizzarello, Sandra
   Ogliore, Ryan
   Schmitt-Kopplin, Phillipe
   Harir, Mourad
   Hertkorn, Norbert
   Verchovsky, Alexander
   Grady, Monica
   Nagao, Keisuke
   Okazaki, Ryuji
   Takechi, Hiroyuki
   Hiroi, Takahiro
   Smith, Ken
   Silber, Elizabeth A.
   Brown, Peter G.
   Albers, Jim
   Klotz, Doug
   Hankey, Mike
   Matson, Robert
   Fries, Jeffrey A.
   Walker, Richard J.
   Puchtel, Igor
   Lee, Cin-Ty A.
   Erdman, Monica E.
   Eppich, Gary R.
   Roeske, Sarah
   Gabelica, Zelimir
   Lerche, Michael
   Nuevo, Michel
   Girten, Beverly
   Worden, Simon P.
CA Sutter's Mill Meteorite Consortium
TI Radar-Enabled Recovery of the Sutter's Mill Meteorite, a Carbonaceous
   Chondrite Regolith Breccia
SO SCIENCE
LA English
DT Article
ID OXYGEN ISOTOPIC COMPOSITIONS; MURCHISON METEORITE; PARENT BODIES; TAGISH
   LAKE; FALL; METEOROIDS; ORIGIN; ACIDS
AB Doppler weather radar imaging enabled the rapid recovery of the Sutter's Mill meteorite after a rare 4-kiloton of TNT-equivalent asteroid impact over the foothills of the Sierra Nevada in northern California. The recovered meteorites survived a record high-speed entry of 28.6 kilometers per second from an orbit close to that of Jupiter-family comets (Tisserand's parameter = 2.8 +/- 0.3). Sutter's Mill is a regolith breccia composed of CM (Mighei)-type carbonaceous chondrite and highly reduced xenolithic materials. It exhibits considerable diversity of mineralogy, petrography, and isotope and organic chemistry, resulting from a complex formation history of the parent body surface. That diversity is quickly masked by alteration once in the terrestrial environment but will need to be considered when samples returned by missions to C-class asteroids are interpreted.
C1 [Jenniskens, Peter; Hamajima, Yasunori; Nuevo, Michel] ISETI Inst, Mountain View, CA 94043 USA.
   [Jenniskens, Peter; Sandford, Scott A.; Sears, Derek; Cooper, George; Nuevo, Michel; Girten, Beverly; Worden, Simon P.] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
   [Fries, Marc D.] Planetary Sci Inst, Tucson, AZ 85719 USA.
   [Yin, Qing-Zhu; Wimpenny, Josh; Yamakawa, Akane; Verosub, Kenneth L.; Roeske, Sarah] Univ Calif Davis, Dept Geol, Davis, CA 95616 USA.
   [Zolensky, Michael] NASA, Johnson Space Ctr, Houston, TX 77058 USA.
   [Krot, Alexander N.; Ogliore, Ryan] Univ Hawaii Manoa, Hawaii Inst Geophys, Honolulu, HI 96822 USA.
   [Krot, Alexander N.; Ogliore, Ryan] Univ Hawaii Manoa, Planetol & Astrobiol Inst, Honolulu, HI 96822 USA.
   [Beauford, Robert] Univ Arkansas, Arkansas Ctr Space & Planetary Sci, Fayetteville, AR 72701 USA.
   [Ebel, Denton S.; Friedrich, Jon M.] Amer Museum Nat Hist, Dept Earth & Planetary Sci, New York, NY 10024 USA.
   [Friedrich, Jon M.] Fordham Univ, Dept Chem, Bronx, NY 10458 USA.
   [Nishiizumi, Kunihiko; Welten, Kees C.] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA.
   [Hamajima, Yasunori] Kanazawa Univ, Low Level Radioact Lab, Nomi, Ishikawa 9231224, Japan.
   [Caffee, Marc W.] Purdue Univ, Dept Phys, W Lafayette, IN 47907 USA.
   [Laubenstein, Matthias] Ist Nazl Fis Nucl, Lab Nazl Gran Sasso, I-67100 Assergi, Italy.
   [Davis, Andrew M.; Simon, Steven B.; Heck, Philipp R.] Univ Chicago, Chicago Ctr Cosmochem, Chicago, IL 60637 USA.
   [Davis, Andrew M.; Simon, Steven B.; Heck, Philipp R.] Univ Chicago, Dept Geophys Sci, Enrico Fermi Inst, Chicago, IL 60637 USA.
   [Davis, Andrew M.; Heck, Philipp R.] Field Museum Nat Hist, Robert Pritzker Ctr Meteorit & Polar Studies, Chicago, IL 60605 USA.
   [Young, Edward D.] Univ Calif Los Angeles, Dept Earth & Space Sci, Los Angeles, CA 90095 USA.
   [Kohl, Issaku E.; Nunn, Morgan H.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
   [Thiemens, Mark H.; Nunn, Morgan H.] Univ Calif San Diego, Dept Chem & Biochem, La Jolla, CA 92093 USA.
   [Mikouchi, Takashi] Univ Tokyo, Dept Earth & Planetary Sci, Bunkyo Ku, Tokyo 1130033, Japan.
   [Hagiya, Kenji] Univ Hyogo, Grad Sch Life Sci, Hyogo 6781297, Japan.
   [Ohsumi, Kazumasa] Japan Synchrotron Radiat Res Inst, Sayo, Hyogo 6795189, Japan.
   [Cahill, Thomas A.; Lawton, Jonathan A.; Barnes, David] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA.
   [Steele, Andrew] Carnegie Inst Sci, Geophys Lab, Washington, DC USA.
   [Rochette, Pierre; Gattacceca, Jerome] Aix Marseille Univ, CNRS, Ctr Europeen Rech & Enseignement, F-13545 Aix En Provence, France.
   [Glavin, Daniel P.; Burton, Aaron S.; Dworkin, Jason P.; Elsila, Jamie E.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
   [Burton, Aaron S.] Oak Ridge Associated Univ, Greenbelt, MD 20771 USA.
   [Pizzarello, Sandra] Arizona State Univ, Tempe, AZ 85287 USA.
   [Schmitt-Kopplin, Phillipe; Harir, Mourad; Hertkorn, Norbert] Helmholtz Zentrum Munchen, D-85764 Munich, Germany.
   [Schmitt-Kopplin, Phillipe] Tech Univ Munich, Freising Weihenstephan, Germany.
   [Verchovsky, Alexander; Grady, Monica] Open Univ, Planetary & Space Sci Res Inst, Milton Keynes MK7 6AA, Bucks, England.
   [Nagao, Keisuke] Univ Tokyo, Geochem Res Ctr, Bunkyo Ku, Tokyo 1130033, Japan.
   [Okazaki, Ryuji; Takechi, Hiroyuki] Kyushu Univ, Dept Earth & Planetary Sci, Fukuoka 8128581, Japan.
   [Hiroi, Takahiro] Brown Univ, Dept Geol Sci, Providence, RI 02912 USA.
   [Smith, Ken] Univ Nevada, Nevada Seismol Lab, Reno, NV 89557 USA.
   [Silber, Elizabeth A.; Brown, Peter G.] Univ Western Ontario, London, ON N6A 3K7, Canada.
   [Klotz, Doug] Space Sci Sch, Incline Village, NV 89451 USA.
   [Hankey, Mike] Amer Meteor Soc, Geneseo, NY 14454 USA.
   [Matson, Robert] Sci Applicat Int Corp, Seal Beach, CA 90740 USA.
   [Fries, Jeffrey A.] USAF, Weather Agcy, Weather Grp 1, Offutt Af Base, NE 68113 USA.
   [Walker, Richard J.; Puchtel, Igor] Univ Maryland, Dept Geol, College Pk, MD 20742 USA.
   [Lee, Cin-Ty A.; Erdman, Monica E.] Rice Univ, Dept Earth Sci, Houston, TX 77005 USA.
   [Eppich, Gary R.] Lawrence Livermore Natl Lab, Glenn Seaborg Inst, Livermore, CA 94550 USA.
   [Gabelica, Zelimir] Univ Haute Alsace, F-68093 Mulhouse, France.
   [Lerche, Michael] Univ Calif,Davis, McClellan Nucl Res Ctr, Mcclellan, CA 95652 USA.
RP Jenniskens, P (reprint author), ISETI Inst, 189 Bernardo Ave, Mountain View, CA 94043 USA.
EM petrus.m.jenniskens@nasa.gov
RI Dworkin, Jason/C-9417-2012; Yin, Qing-Zhu/B-8198-2009; Laubenstein,
   Matthias/C-4851-2013; Steele, Andrew/A-3573-2013; Lee,
   Cin-Ty/A-5469-2008; Burton, Aaron/H-2212-2011; Glavin,
   Daniel/D-6194-2012; Schmitt-Kopplin, Philippe/H-6271-2011; Caffee,
   Marc/K-7025-2015; HAMAJIMA, Yasunori/L-3802-2015; U-ID,
   Kyushu/C-5291-2016; Walker, Richard/K-6869-2016; Elsila,
   Jamie/C-9952-2012
OI Dworkin, Jason/0000-0002-3961-8997; Erdman, Monica
   E./0000-0001-5115-6759; Davis, Andrew/0000-0001-7955-6236; Grady,
   Monica/0000-0002-4055-533X; Eppich, Gary/0000-0003-2176-6673; Yin,
   Qing-Zhu/0000-0002-4445-5096; Laubenstein, Matthias/0000-0001-5390-4343;
   Burton, Aaron/0000-0002-7137-1605; Glavin, Daniel/0000-0001-7779-7765;
   Schmitt-Kopplin, Philippe/0000-0003-0824-2664; Caffee,
   Marc/0000-0002-6846-8967; HAMAJIMA, Yasunori/0000-0002-8485-4606;
   Walker, Richard/0000-0003-0348-2407; 
FU NASA Cosmochemistry Program; NASA Lunar Science Institute; Near Earth
   Object Observation Program; Origins of Solar Systems; Planetary Major
   Equipment; Sample Return Laboratory Instruments; NASA Astrobiology
   Institute; SPring-8 Grant Program; Post Doctoral Programs; Tawani
   Foundation; Japan Society for the Promotion of Science
FX The rapid recovery of SM was made possible by the local communities of
   Lotus, Coloma, Pilot Hill, and Grass Valley, due in part to the support
   of property owners, community leaders, SETI Institute and University of
   Caifornia at Davis (UC Davis) student and volunteer searchers, and
   officials of the Marshall Gold Discovery State Historic Park and the
   State of California. We thank J. Howard, M. Carter, D. E. Macon, and L.
   Hofland of the NASA Ames Research Center; M. Hill of the American Museum
   of Natural History; and G. Baxter, N. Botto, D. Rowland, O. Kreylos, L.
   Kellogg, and D. Summer of UC Davis for assistance with reported
   measurements. The NASA Ames Research Center-coordinated search efforts
   were supported by the NASA Lunar Science Institute. E. D. Y., M. Z., A.
   M. D., D. S. E., J. E. E., K. N., K. C. W., M. H. T., M. W. C., Q.-Z.
   Y., and S. B. S. acknowledge the NASA Cosmochemistry Program for support
   of work reported here. In addition, the following NASA programs are
   sincerely acknowledged: Near Earth Object Observation Program (P. J.),
   Origins of Solar Systems (S. A. S.), Planetary Major Equipment (Q.-Z.
   Y.), Sample Return Laboratory Instruments and Data Analysis (M. W. C.),
   the NASA Astrobiology Institute (J. E. E., J. P. D., and D. P. G.), the
   SPring-8 Grant Program (M. Z.), and Post Doctoral Programs (A. S. B.).
   P. R. H. acknowledges support from the Tawani Foundation. R. O.
   acknowledges KAKENHI grants from the Japan Society for the Promotion of
   Science.
NR 47
TC 69
Z9 69
U1 4
U2 95
PU AMER ASSOC ADVANCEMENT SCIENCE
PI WASHINGTON
PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 USA
SN 0036-8075
EI 1095-9203
J9 SCIENCE
JI Science
PD DEC 21
PY 2012
VL 338
IS 6114
BP 1583
EP 1587
DI 10.1126/science.1227163
PG 5
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 057AE
UT WOS:000312533100044
PM 23258889
ER

PT J
AU Eplee, RE
   Meister, G
   Patt, FS
   Barnes, RA
   Bailey, SW
   Franz, BA
   McClain, CR
AF Eplee, Robert E., Jr.
   Meister, Gerhard
   Patt, Frederick S.
   Barnes, Robert A.
   Bailey, Sean W.
   Franz, Bryan A.
   McClain, Charles R.
TI On-orbit calibration of SeaWiFS
SO APPLIED OPTICS
LA English
DT Article
ID OCEAN COLOR IMAGERY; RADIOMETRIC CALIBRATION; VARIABILITY; STABILITY;
   DETECTOR; SENSORS; AERONET; MOON; GAIN
AB Ocean color climate data records (CDRs) require water-leaving radiances with 5% absolute and 1% relative accuracies as input. Because of the amplification of any sensor calibration errors by the atmospheric correction, the 1% relative accuracy requirement translates into a 0.1% long-term radiometric stability requirement for top-of-the-atmosphere (TOA) radiances. The rigorous prelaunch and on-orbit calibration program developed and implemented for Sea-viewing Wide Field-of-view Sensor (SeaWiFS) by the NASA Ocean Biology Processing Group (OBPG) has led to the incorporation of significant changes into the on-orbit calibration methodology over the 13-year lifetime of the instrument. Evolving instrument performance and ongoing algorithm refinement have resulted in updates to approaches for the lunar, solar, and vicarious calibration of SeaWiFS. The uncertainties in the calibrated TOA radiances are addressed in terms of accuracy (biases in the measurements), precision (scatter in the measurements), and stability (repeatability of the measurements). The biases are 2%-3% from lunar calibration and 1%-2% from vicarious calibration. The precision is 0.16% from solar signal-to-noise ratios, 0.13% from lunar residuals, and 0.10% from vicarious gains. The long-term stability of the TOA radiances, derived from the lunar time series, is 0.13%. The stability of the vicariously calibrated TOA radiances, incorporating the uncertainties of the in situ measurements and the atmospheric correction, is 0.30%. This stability of the radiometric calibration of SeaWiFS over its 13-year on-orbit lifetime has allowed the OBPG to produce CDRs from the ocean color data set. (C) 2012 Optical Society of America
C1 [Eplee, Robert E., Jr.; Patt, Frederick S.; Barnes, Robert A.] Sci Applicat Int Corp, Beltsville, MD 20705 USA.
   [Meister, Gerhard; Franz, Bryan A.; McClain, Charles R.] NASA, Ocean Ecol Branch, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
   [Bailey, Sean W.] FutureTech Corp, Greenbelt, MD 20770 USA.
RP Eplee, RE (reprint author), Sci Applicat Int Corp, 4600 Powdermill Rd,Suite 400, Beltsville, MD 20705 USA.
EM Robert.E.Eplee@nasa.gov
RI Franz, Bryan/D-6284-2012; Bailey, Sean/D-3077-2017
OI Franz, Bryan/0000-0003-0293-2082; Bailey, Sean/0000-0001-8339-9763
NR 46
TC 13
Z9 13
U1 2
U2 16
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1559-128X
EI 2155-3165
J9 APPL OPTICS
JI Appl. Optics
PD DEC 20
PY 2012
VL 51
IS 36
BP 8702
EP 8730
DI 10.1364/AO.51.008702
PG 29
WC Optics
SC Optics
GA 060MZ
UT WOS:000312783700026
PM 23262612
ER

PT J
AU Iguchi, T
   Matsui, T
   Tokay, A
   Kollias, P
   Tao, WK
AF Iguchi, Takamichi
   Matsui, Toshihisa
   Tokay, Ali
   Kollias, Pavlos
   Tao, Wei-Kuo
TI Two distinct modes in one-day rainfall event during MC3E field campaign:
   Analyses of disdrometer observations and WRF-SBM simulation
SO GEOPHYSICAL RESEARCH LETTERS
LA English
DT Article
ID SIZE; UNCERTAINTIES
AB A unique microphysical structure of rainfall is observed by the surface laser optical Particle Size and Velocity (Parsivel) disdrometers on 25 April 2011 during Midlatitude Continental Convective Clouds Experiment (MC3E). According to the systematic differences in rainfall rate and bulk effective droplet radius, the sampling data can be divided into two groups; the rainfall mostly from the deep convective clouds has relatively high rainfall rate and large bulk effective droplet radius, whereas the reverse is true for the rainfall from the shallow warm clouds. The Weather Research and Forecasting model coupled with spectral bin microphysics (WRF-SBM) successfully reproduces the two distinct modes in the observed rainfall microphysical structure. The results show that the up-to-date model can demonstrate how the cloud physics and the weather condition on the day are involved in forming the unique rainfall characteristic. Citation: Iguchi, T., T. Matsui, A. Tokay, P. Kollias, and W.-K. Tao (2012), Two distinct modes in one-day rainfall event during MC3E field campaign: Analyses of disdrometer observations and WRF-SBM simulation, Geophys. Res. Lett., 39, L24805, doi:10.1029/2012GL053329.
C1 [Iguchi, Takamichi; Matsui, Toshihisa] Univ Maryland, Earth Syst Sci Interdisciplinary Ctr, College Pk, MD 20742 USA.
   [Iguchi, Takamichi; Matsui, Toshihisa; Tokay, Ali; Tao, Wei-Kuo] NASA, Atmospheres Lab, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
   [Tokay, Ali] Univ Maryland, Joint Ctr Earth Syst Technol, Baltimore, MD 21201 USA.
   [Kollias, Pavlos] McGill Univ, Dept Atmospher & Ocean Sci, Montreal, PQ, Canada.
RP Iguchi, T (reprint author), NASA, Atmospheres Lab, Goddard Space Flight Ctr, Code 612, Greenbelt, MD 20771 USA.
EM takamichi.iguchi@nasa.gov
RI Measurement, Global/C-4698-2015
FU NASA Precipitation Measuring Mission (PMM); NASA Modeling Analysis
   Prediction (MAP)
FX This study was supported by the NASA Precipitation Measuring Mission
   (PMM) and NASA Modeling Analysis Prediction (MAP). We acknowledge the
   collaboration with the U. S. Department of Energy (DOE) as part of the
   ARM Climate Research Facility SGP site, as a part of the joint NASA-DOE
   MC3E field campaign.
NR 12
TC 7
Z9 7
U1 2
U2 16
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0094-8276
J9 GEOPHYS RES LETT
JI Geophys. Res. Lett.
PD DEC 20
PY 2012
VL 39
AR L24805
DI 10.1029/2012GL053329
PG 7
WC Geosciences, Multidisciplinary
SC Geology
GA 061UN
UT WOS:000312874000001
ER

PT J
AU Xie, Y
   Yang, P
   Liou, KN
   Minnis, P
   Duda, DP
AF Xie, Yu
   Yang, Ping
   Liou, Kuo-Nan
   Minnis, Patrick
   Duda, David P.
TI Parameterization of contrail radiative properties for climate studies
SO GEOPHYSICAL RESEARCH LETTERS
LA English
DT Article
ID CIRRUS CLOUDS; OPTICAL-PROPERTIES; LIGHT-SCATTERING; ICE PARTICLES;
   SIMULATION; CRYSTALS
AB The study of contrails and their impact on global climate change requires a cloud model that statistically represents contrail radiative properties. In this study, the microphysical properties of global contrails are statistically analyzed using collocated Moderate Resolution Imaging Spectroradiometer (MODIS) and Cloud Aerosol Lidar with Orthogonal Polarization (CALIOP) observations. The MODIS contrail pixels are detected using an automated contrail detection algorithm and a manual technique using the brightness temperature differences between the MODIS 11 and 12 mm channels. The scattering and absorption properties of typical contrail ice crystals are used to determine an appropriate contrail model to minimize the uncertainties arising from the assumptions in a particular cloud model. The depolarization ratio is simulated with a variety of ice crystal habit fractions and matched to the collocated MODIS and CALIOP observations. The contrail habit fractions are determined and used to compute the bulk-scattering properties of contrails. A parameterization of shortwave and longwave contrail optical properties is developed for the spectral bands of the Rapid Radiative Transfer Model (RRTM). The contrail forcing at the top of the atmosphere is investigated using the RRTM and compared with spherical and hexagonal ice cloud models. Contrail forcing is overestimated when spherical ice crystals are used to represent contrails, but if a hexagonal ice cloud model is used, the forcing is underestimated for small particles and overestimated for large particles in comparison to the contrail model developed in this study. Citation: Xie, Y., P. Yang, K.-N. Liou, P. Minnis, and D. P. Duda (2012), Parameterization of contrail radiative properties for climate studies, Geophys. Res. Lett., 39, L00F02, doi:10.1029/2012GL054043.
C1 [Xie, Yu; Yang, Ping] Texas A&M Univ, Dept Atmospher Sci, College Stn, TX 77843 USA.
   [Liou, Kuo-Nan] Univ Calif Los Angeles, Joint Inst Earth Syst Sci & Engn, Los Angeles, CA USA.
   [Liou, Kuo-Nan] Univ Calif Los Angeles, Dept Atmospher & Ocean Sci, Los Angeles, CA USA.
   [Minnis, Patrick] NASA, Langley Res Ctr, Sci Directorate, Hampton, VA 23665 USA.
   [Duda, David P.] Sci Syst & Applicat Inc, Hampton, VA USA.
RP Yang, P (reprint author), Texas A&M Univ, Dept Atmospher Sci, College Stn, TX 77843 USA.
EM pyang@tamu.edu
RI Yang, Ping/B-4590-2011; Minnis, Patrick/G-1902-2010
OI Minnis, Patrick/0000-0002-4733-6148
FU Aviation Climate Change Research Initiative (ACCRI); Federal Aviation
   Administration (FAA) [DTRT57-10-C-10016, DTRT57-10-X-70020]
FX This work is supported by the Aviation Climate Change Research
   Initiative (ACCRI) sponsored by the Federal Aviation Administration
   (FAA) under contracts DTRT57-10-C-10016 and DTRT57-10-X-70020. The
   authors thank Rangasayi Halthore and S. Daniel Jacob from the FAA for
   overseeing the project progress and for guidance and encouragement.
NR 20
TC 6
Z9 6
U1 1
U2 8
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0094-8276
J9 GEOPHYS RES LETT
JI Geophys. Res. Lett.
PD DEC 20
PY 2012
VL 39
AR L00F02
DI 10.1029/2012GL054043
PG 6
WC Geosciences, Multidisciplinary
SC Geology
GA 061UN
UT WOS:000312874000007
ER

PT J
AU Wilson, MJ
   Sherwin, BD
   Hill, JC
   Addison, G
   Battaglia, N
   Bond, JR
   Das, S
   Devlin, MJ
   Dunkley, J
   Dunner, R
   Fowler, JW
   Gralla, MB
   Hajian, A
   Halpern, M
   Hilton, M
   Hincks, AD
   Hlozek, R
   Huffenberger, K
   Hughes, JP
   Kosowsky, A
   Louis, T
   Marriage, TA
   Marsden, D
   Menanteau, F
   Moodley, K
   Niemack, MD
   Nolta, MR
   Page, LA
   Partridge, B
   Reese, ED
   Sehgal, N
   Sievers, J
   Spergel, DN
   Staggs, ST
   Swetz, DS
   Switzer, ER
   Trac, H
   Wollack, E
AF Wilson, Michael J.
   Sherwin, Blake D.
   Hill, J. Colin
   Addison, Graeme
   Battaglia, Nick
   Bond, J. Richard
   Das, Sudeep
   Devlin, Mark J.
   Dunkley, Joanna
   Duenner, Rolando
   Fowler, Joseph W.
   Gralla, Megan B.
   Hajian, Amir
   Halpern, Mark
   Hilton, Matt
   Hincks, Adam D.
   Hlozek, Renee
   Huffenberger, Kevin
   Hughes, John P.
   Kosowsky, Arthur
   Louis, Thibaut
   Marriage, Tobias A.
   Marsden, Danica
   Menanteau, Felipe
   Moodley, Kavilan
   Niemack, Michael D.
   Nolta, Michael R.
   Page, Lyman A.
   Partridge, Bruce
   Reese, Erik D.
   Sehgal, Neelima
   Sievers, Jon
   Spergel, David N.
   Staggs, Suzanne T.
   Swetz, Daniel S.
   Switzer, Eric R.
   Trac, Hy
   Wollack, Ed
TI Atacama Cosmology Telescope: A measurement of the thermal
   Sunyaev-Zel'dovich effect using the skewness of the CMB temperature
   distribution
SO PHYSICAL REVIEW D
LA English
DT Article
ID SOUTH-POLE TELESCOPE; ANGULAR POWER SPECTRUM; GALAXY CLUSTERS; 148 GHZ;
   PHYSICS; PROBE; MAPS; FLUCTUATIONS; SIMULATIONS; PARAMETERS
AB We present a detection of the unnormalized skewness <(T) over tilde (3)((n) over cap)> induced by the thermal Sunyaev-Zel'dovich (tSZ) effect in filtered Atacama Cosmology Telescope ( ACT) 148 GHz cosmic microwave background temperature maps. Contamination due to infrared and radio sources is minimized by template subtraction of resolved sources and by constructing a mask using outlying values in the 218 GHz (tSZ-null) ACT maps. We measure <(T) over tilde (3)((n) over cap)> = -31 +/- 6 mu K-3 (Gaussian statistics assumed) or +/- 14 mu K-3 ( including non- Gaussian corrections) in the filtered ACT data, a 5 sigma detection. We show that the skewness is a sensitive probe of sigma(8), and use analytic calculations and tSZ simulations to obtain cosmological constraints from this measurement. From this signal alone we infer a value of sigma(8) = 0.79(-0.03)(+0.03) (68% C.L.) (+0.06)(-0.06)(95% C.L.). Our results demonstrate that measurements of non- Gaussianity can be a useful method for characterizing the tSZ effect and extracting the underlying cosmological information. DOI: 10.1103/PhysRevD.86.122005
C1 [Sherwin, Blake D.; Das, Sudeep; Fowler, Joseph W.; Niemack, Michael D.; Page, Lyman A.; Staggs, Suzanne T.; Switzer, Eric R.] Princeton Univ, Dept Phys, Princeton, NJ 08544 USA.
   [Wilson, Michael J.; Addison, Graeme; Dunkley, Joanna; Louis, Thibaut] Univ Oxford, Dept Astrophys, Oxford OX1 3RH, England.
   [Wilson, Michael J.; Hill, J. Colin; Das, Sudeep; Hlozek, Renee; Marriage, Tobias A.; Sehgal, Neelima; Spergel, David N.] Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA.
   [Battaglia, Nick; Trac, Hy] Carnegie Mellon Univ, Dept Phys, Pittsburgh, PA 15213 USA.
   [Bond, J. Richard; Hajian, Amir; Hincks, Adam D.; Nolta, Michael R.; Sievers, Jon] Univ Toronto, Canadian Inst Theoret Astrophys, Toronto, ON M5S 3H8, Canada.
   [Das, Sudeep] Univ Calif Berkeley, Dept Phys, Berkeley Ctr Cosmol Phys, Berkeley, CA 94720 USA.
   [Devlin, Mark J.; Reese, Erik D.; Swetz, Daniel S.] Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA.
   [Duenner, Rolando] Pontificia Univ Catolica Chile, Dept Astron & Astrofis, Santiago 22, Chile.
   [Fowler, Joseph W.; Niemack, Michael D.; Swetz, Daniel S.] NIST, Quantum Devices Grp, Boulder, CO 80305 USA.
   [Gralla, Megan B.; Marriage, Tobias A.] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA.
   [Halpern, Mark] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z4, Canada.
   [Hilton, Matt] Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England.
   [Huffenberger, Kevin] Univ Miami, Dept Phys, Coral Gables, FL 33146 USA.
   [Hughes, John P.; Menanteau, Felipe] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA.
   [Kosowsky, Arthur] Univ Pittsburgh, Dept Phys & Astron, Pittsburgh, PA 15260 USA.
   [Marsden, Danica] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA.
   [Moodley, Kavilan] Univ KwaZulu Natal, Astrophys & Cosmol Res Unit, ZA-4041 Durban, South Africa.
   [Partridge, Bruce] Haverford Coll, Dept Phys & Astron, Haverford, PA 19041 USA.
   [Switzer, Eric R.] Kavli Inst Cosmol Phys, Chicago, IL 60637 USA.
   [Wollack, Ed] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
RP Sherwin, BD (reprint author), Princeton Univ, Dept Phys, Princeton, NJ 08544 USA.
EM bsherwin@princeton.edu
RI Spergel, David/A-4410-2011; Hilton, Matthew James/N-5860-2013; Trac,
   Hy/N-8838-2014; Wollack, Edward/D-4467-2012; 
OI Trac, Hy/0000-0001-6778-3861; Wollack, Edward/0000-0002-7567-4451;
   Huffenberger, Kevin/0000-0001-7109-0099; Sievers,
   Jonathan/0000-0001-6903-5074
FU U.S. NSF [AST-0408698, PHY-0355328, AST-0707731, PIRE-0507768];
   Princeton University; University of Pennsylvania; FONDAP; Basal, Centre
   AIUC; RCUK Fellowship; NASA [NNX08AH30G]; NSERC PGSD; NSF [AST-0546035,
   AST-0807790]; NSF PFC [PHY-0114422]; KICP Fellowship; SLAC
   [DE-AC3-76SF00515]; ERC [259505]; BCCP; NSF GRFP; Programa de
   Astronomia, a program of the Comision Nacional de Investigacion
   Cientifica y Tecnologica de Chile (CONICYT)
FX As this manuscript was being prepared, we learned of related theoretical
   work by the authors of Ref. [44], and we acknowledge very helpful
   discussions with the members of this collaboration. This work was
   supported by the U.S. NSF through Grants No. AST-0408698, No.
   PHY-0355328, No. AST-0707731, and No. PIRE-0507768, as well as by
   Princeton University, the University of Pennsylvania, FONDAP, Basal,
   Centre AIUC, RCUK Fellowship (J. D.), NASA Grant No. NNX08AH30G (S. D.,
   A. H., T. M.), NSERC PGSD (A. D. H.), NSF Grants No. AST-0546035 and No.
   AST-0807790 (A. K.), NSF PFC Grant No. PHY-0114422 (E. S.), KICP
   Fellowship (E. S.), SLAC Grant No. DE-AC3-76SF00515 (N. S.), ERC Grant
   No. 259505 (J. D.), BCCP (S. D.), and the NSF GRFP (B. D. S., B. L. S.).
   We thank B. Berger, R. Escribano, T. Evans, D. Faber, P. Gallardo, A.
   Gomez, M. Gordon, D. Holtz, M. McLaren, W. Page, R. Plimpton, D.
   Sanchez, O. Stryzak, M. Uehara, and Astro-Norte for assistance with ACT.
   ACT operates in the Parque Astronomico Atacama in northern Chile under
   the auspices of Programa de Astronomia, a program of the Comision
   Nacional de Investigacion Cientifica y Tecnologica de Chile (CONICYT).
NR 42
TC 20
Z9 20
U1 0
U2 9
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD DEC 20
PY 2012
VL 86
IS 12
AR 122005
DI 10.1103/PhysRevD.86.122005
PG 10
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 059JQ
UT WOS:000312701600002
ER

PT J
AU Hou, EQ
   Chen, CR
   McGroddy, ME
   Wen, DZ
AF Hou, Enqing
   Chen, Chengrong
   McGroddy, Megan E.
   Wen, Dazhi
TI Nutrient Limitation on Ecosystem Productivity and Processes of Mature
   and Old-Growth Subtropical Forests in China
SO PLOS ONE
LA English
DT Article
ID N-P RATIOS; LEAF-LITTER DECOMPOSITION; NET PRIMARY PRODUCTIVITY; GLOBAL
   NITROGEN-CYCLE; TROPICAL RAIN-FOREST; MICROBIAL BIOMASS-C; PHOSPHORUS
   LIMITATION; TERRESTRIAL ECOSYSTEMS; MINERAL-NUTRITION; SOUTHERN CHINA
AB Nitrogen (N) is considered the dominant limiting nutrient in temperate regions, while phosphorus (P) limitation frequently occurs in tropical regions, but in subtropical regions nutrient limitation is poorly understood. In this study, we investigated N and P contents and N: P ratios of foliage, forest floors, fine roots and mineral soils, and their relationships with community biomass, litterfall C, N and P productions, forest floor turnover rate, and microbial processes in eight mature and old-growth subtropical forests (stand age >80 yr) at Dinghushan Biosphere Reserve, China. Average N: P ratios (mass based) in foliage, litter (L) layer and mixture of fermentation and humus (F/H) layer, and fine roots were 28.3, 42.3, 32.0 and 32.7, respectively. These values are higher than the critical N: P ratios for P limitation proposed (16-20 for foliage, ca. 25 for forest floors). The markedly high N: P ratios were mainly attributed to the high N concentrations of these plant materials. Community biomass, litterfall C, N and P productions, forest floor turnover rate and microbial properties were more strongly related to measures of P than N and frequently negatively related to the N: P ratios, suggesting a significant role of P availability in determining ecosystem production and productivity and nutrient cycling at all the study sites except for one prescribed disturbed site where N availability may also be important. We propose that N enrichment is probably a significant driver of the potential P limitation in the study area. Low P parent material may also contribute to the potential P limitation. In general, our results provided strong evidence supporting a significant role for P availability, rather than N availability, in determining ecosystem primary productivity and ecosystem processes in subtropical forests of China.
C1 [Hou, Enqing; Chen, Chengrong] Griffith Univ, Griffith Sch Environm, Environm Futures Ctr, Nathan, Qld 4111, Australia.
   [Hou, Enqing; Wen, Dazhi] Chinese Acad Sci, S China Bot Garden, Key Lab Vegetat Restorat & Management Degraded Ec, Guangzhou, Guangdong, Peoples R China.
   [McGroddy, Megan E.] Univ Virginia, Dept Environm Sci, NASA, Charlottesville, VA 22903 USA.
   [Hou, Enqing; Wen, Dazhi] Univ Chinese Acad Sci, Beijing, Peoples R China.
RP Chen, CR (reprint author), Griffith Univ, Griffith Sch Environm, Environm Futures Ctr, Nathan, Qld 4111, Australia.
EM c.chen@griffith.edu.au; dzwen@scbg.ac.cn
RI Chen, Chengrong/B-3814-2009; Hou, Enqing/A-2056-2016; ,
   Enqing/G-4629-2013
OI Chen, Chengrong/0000-0001-6377-4001; Hou, Enqing/0000-0003-4864-2347; ,
   Enqing/0000-0002-5162-488X
FU National Natural Science Foundation of China [31070409]; Strategic
   Priority Research Program - Climate Change: Carbon Budget and Relevant
   Issues of the Chinese Academy of Sciences [XDA05050205]; Australian
   Research Council [FT0990547]; China Scholarship Council
FX This study was supported by National Natural Science Foundation of China
   (No. 31070409), Strategic Priority Research Program - Climate Change:
   Carbon Budget and Relevant Issues of the Chinese Academy of Sciences
   (No. XDA05050205 and the Australian Research Council (FT0990547). The
   support from China Scholarship Council through an overseas joint
   doctoral fellowship to Enqing Hou is also kindly acknowledged. The
   funders had no role in study design, data collection and analysis,
   decision to publish, or preparation of the manuscript.
NR 85
TC 7
Z9 7
U1 8
U2 94
PU PUBLIC LIBRARY SCIENCE
PI SAN FRANCISCO
PA 1160 BATTERY STREET, STE 100, SAN FRANCISCO, CA 94111 USA
SN 1932-6203
J9 PLOS ONE
JI PLoS One
PD DEC 20
PY 2012
VL 7
IS 12
AR e52071
DI 10.1371/journal.pone.0052071
PG 12
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 060RA
UT WOS:000312794500083
PM 23284873
ER

PT J
AU Dalba, PA
   Buratti, BJ
   Brown, RH
   Barnes, JW
   Baines, KH
   Sotin, C
   Clark, RN
   Lawrence, KJ
   Nicholson, PD
AF Dalba, Paul A.
   Buratti, Bonnie J.
   Brown, Robert H.
   Barnes, Jason W.
   Baines, Kevin H.
   Sotin, Christophe
   Clark, Roger N.
   Lawrence, Kenneth J.
   Nicholson, Philip D.
TI CASSINI VIMS OBSERVATIONS SHOW ETHANE IS PRESENT IN TITAN'S RAINFALL
SO ASTROPHYSICAL JOURNAL LETTERS
LA English
DT Article
DE planets and satellites: individual (Titan); planets and satellites:
   surfaces
ID METHANE CYCLE; SURFACE; RADAR; LAKES; CLOUDS; DUNES
AB Observations obtained over two years by the Cassini Imaging Science Subsystem suggest that rain showers fall on the surface. Using measurements obtained by the Visual Infrared Mapping Spectrometer, we identify the main component of the rain to be ethane, with methane as an additional component. We observe five or six probable rainfall events, at least one of which follows a brief equatorial cloud appearance, suggesting that frequent rainstorms occur on Titan. The rainfall evaporates, sublimates, or infiltrates on timescales of months, and in some cases it is associated with fluvial features but not with their creation or alteration. Thus, Titan exhibits frequent "gentle rainfall" instead of, or in addition to, more catastrophic events that cut rivers and lay down large fluvial deposits. Freezing rain may also be present, and the standing liquid may exist as puddles interspersed with patches of frost. The extensive dune deposits found in the equatorial regions of Titan imply multi-season arid conditions there, which are consistent with small, but possibly frequent, amounts of rain, in analogy to terrestrial deserts.
C1 [Dalba, Paul A.; Buratti, Bonnie J.; Baines, Kevin H.; Sotin, Christophe; Lawrence, Kenneth J.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
   [Brown, Robert H.] Univ Arizona, Lunar & Planetary Lab, Tucson, AZ 85721 USA.
   [Barnes, Jason W.] Univ Idaho, Dept Phys, Moscow, ID 83844 USA.
   [Clark, Roger N.] US Geol Survey, Denver, CO 80225 USA.
   [Nicholson, Philip D.] Cornell Univ, Dept Astron, Ithaca, NY 14853 USA.
RP Dalba, PA (reprint author), CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
EM pauldalba@berkeley.edu
RI Barnes, Jason/B-1284-2009
OI Barnes, Jason/0000-0002-7755-3530
NR 24
TC 3
Z9 3
U1 0
U2 29
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 2041-8205
J9 ASTROPHYS J LETT
JI Astrophys. J. Lett.
PD DEC 20
PY 2012
VL 761
IS 2
AR L24
DI 10.1088/2041-8205/761/2/L24
PG 6
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 056MP
UT WOS:000312494600009
ER

PT J
AU Sahai, R
   Gusten, R
   Morris, MR
AF Sahai, R.
   Guesten, R.
   Morris, M. R.
TI ARE LARGE, COMETARY-SHAPED PROPLYDS REALLY (FREE-FLOATING) EVAPORATING
   GAS GLOBULES?
SO ASTROPHYSICAL JOURNAL LETTERS
LA English
DT Article
DE ISM: individual objects (PCYC 1173); ISM: jets and outflows;
   protoplanetary disks; stars: formation; stars: pre-main sequence
ID YOUNG STELLAR OBJECTS; PROTOPLANETARY DISKS; ORION NEBULA; CARINA
   NEBULA; EMISSION; CAMERA
AB We report the detection of strong and compact molecular line emission (in the CO J = 3-2, 4-3, 6-5, 7-6, (CO)-C-13 J = 3-2, HCN, and HCO+ J = 4-3 transitions) from a cometary-shaped object (Carina-frEGG1) in the Carina star-forming region (SFR) previously classified as a photoevaporating protoplanetary disk (proplyd). We derive a molecular mass of 0.35 M-circle dot for Carina-frEGG1, which shows that it is not a proplyd, but belongs to a class of free-floating evaporating gas globules (frEGGs) recently found in the Cygnus SFR by Sahai et al. Archival adaptive optics near-IR (Ks) images show a central hourglass-shaped nebula. The derived source luminosity (about 8-18 L-circle dot), the hourglass morphology, and the presence of collimated jets seen in Hubble Space Telescope images imply the presence of a jet-driving, young, low-mass star deeply embedded in the dust inside Carina-frEGG1. Our results suggest that the true nature of many or most such cometary-shaped objects seen in massive SFRs and previously labeled as proplyds has been misunderstood, and that these are really frEGGs.
C1 [Sahai, R.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
   [Morris, M. R.] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA.
   [Guesten, R.] Max Planck Inst Radioastron, D-53121 Bonn, Germany.
RP Sahai, R (reprint author), CALTECH, Jet Prop Lab, MS 183-900, Pasadena, CA 91109 USA.
EM raghvendra.sahai@jpl.nasa.gov
FU NASA; Research and Technology Development program
FX We thank F. Schuller, APEX, for his help with the LABOCA and SABOCA
   observations and data reduction. R.S.'s contribution to the research
   described here was carried out at JPL, California Institute of
   Technology, under a contract with NASA and partially funded through the
   internal Research and Technology Development program.
NR 24
TC 5
Z9 5
U1 0
U2 5
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 2041-8205
J9 ASTROPHYS J LETT
JI Astrophys. J. Lett.
PD DEC 20
PY 2012
VL 761
IS 2
AR L21
DI 10.1088/2041-8205/761/2/L21
PG 5
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 056MP
UT WOS:000312494600006
ER

PT J
AU Ackermann, M
   Ajello, M
   Atwood, WB
   Baldini, L
   Barbiellini, G
   Bastieri, D
   Bechtol, K
   Bellazzini, R
   Blandford, RD
   Bloom, ED
   Bonamente, E
   Borgland, AW
   Bottacini, E
   Brandt, TJ
   Bregeon, J
   Brigida, M
   Bruel, P
   Buehler, R
   Buson, S
   Caliandro, GA
   Cameron, RA
   Caraveo, PA
   Casandjian, JM
   Cecchi, C
   Charles, E
   Chekhtman, A
   Chiang, J
   Ciprini, S
   Claus, R
   Cohen-Tanugi, J
   Conrad, J
   Cuoco, A
   Cutini, S
   D'Ammando, F
   de Angelis, A
   de Palma, F
   Dermer, CD
   Silva, EDE
   Drell, PS
   Drlica-Wagner, A
   Falletti, L
   Favuzzi, C
   Fegan, SJ
   Focke, WB
   Fukazawa, Y
   Funk, S
   Fusco, P
   Gargano, F
   Gasparrini, D
   Germani, S
   Giglietto, N
   Giordano, F
   Giroletti, M
   Glanzman, T
   Godfrey, G
   Grenier, IA
   Guiriec, S
   Gustafsson, M
   Hadasch, D
   Hayashida, M
   Horan, D
   Hughes, RE
   Jackson, MS
   Jogler, T
   Johannesson, G
   Johnson, AS
   Kamae, T
   Knodlseder, J
   Kuss, M
   Lande, J
   Latronico, L
   Lionetto, AM
   Garde, ML
   Longo, F
   Loparco, F
   Lott, B
   Lovellette, MN
   Lubrano, P
   Mazziotta, MN
   McEnery, JE
   Mehault, J
   Michelson, PF
   Mitthumsiri, W
   Mizuno, T
   Moiseev, AA
   Monte, C
   Monzani, ME
   Morselli, A
   Moskalenko, IV
   Murgia, S
   Naumann-Godo, M
   Norris, JP
   Nuss, E
   Ohsugi, T
   Orienti, M
   Orlando, E
   Ormes, JF
   Paneque, D
   Panetta, JH
   Pesce-Rollins, M
   Pierbattista, M
   Piron, F
   Pivato, G
   Poon, H
   Raino, S
   Rando, R
   Razzano, M
   Razzaque, S
   Reimer, A
   Reimer, O
   Romoli, C
   Sbarra, C
   Scargle, JD
   Sgro, C
   Siskind, EJ
   Spandre, G
   Spinelli, P
   Stawarz, L
   Strong, AW
   Suson, DJ
   Tajima, H
   Takahashi, H
   Tanaka, T
   Thayer, JG
   Thayer, JB
   Tibaldo, L
   Tinivella, M
   Tosti, G
   Troja, E
   Usher, TL
   Vandenbroucke, J
   Vasileiou, V
   Vianello, G
   Vitale, V
   Waite, AP
   Wallace, E
   Wood, KS
   Wood, M
   Yang, Z
   Zaharijas, G
   Zimmer, S
AF Ackermann, M.
   Ajello, M.
   Atwood, W. B.
   Baldini, L.
   Barbiellini, G.
   Bastieri, D.
   Bechtol, K.
   Bellazzini, R.
   Blandford, R. D.
   Bloom, E. D.
   Bonamente, E.
   Borgland, A. W.
   Bottacini, E.
   Brandt, T. J.
   Bregeon, J.
   Brigida, M.
   Bruel, P.
   Buehler, R.
   Buson, S.
   Caliandro, G. A.
   Cameron, R. A.
   Caraveo, P. A.
   Casandjian, J. M.
   Cecchi, C.
   Charles, E.
   Chekhtman, A.
   Chiang, J.
   Ciprini, S.
   Claus, R.
   Cohen-Tanugi, J.
   Conrad, J.
   Cuoco, A.
   Cutini, S.
   D'Ammando, F.
   de Angelis, A.
   de Palma, F.
   Dermer, C. D.
   do Couto e Silva, E.
   Drell, P. S.
   Drlica-Wagner, A.
   Falletti, L.
   Favuzzi, C.
   Fegan, S. J.
   Focke, W. B.
   Fukazawa, Y.
   Funk, S.
   Fusco, P.
   Gargano, F.
   Gasparrini, D.
   Germani, S.
   Giglietto, N.
   Giordano, F.
   Giroletti, M.
   Glanzman, T.
   Godfrey, G.
   Grenier, I. A.
   Guiriec, S.
   Gustafsson, M.
   Hadasch, D.
   Hayashida, M.
   Horan, D.
   Hughes, R. E.
   Jackson, M. S.
   Jogler, T.
   Johannesson, G.
   Johnson, A. S.
   Kamae, T.
   Knoedlseder, J.
   Kuss, M.
   Lande, J.
   Latronico, L.
   Lionetto, A. M.
   Garde, M. Llena
   Longo, F.
   Loparco, F.
   Lott, B.
   Lovellette, M. N.
   Lubrano, P.
   Mazziotta, M. N.
   McEnery, J. E.
   Mehault, J.
   Michelson, P. F.
   Mitthumsiri, W.
   Mizuno, T.
   Moiseev, A. A.
   Monte, C.
   Monzani, M. E.
   Morselli, A.
   Moskalenko, I. V.
   Murgia, S.
   Naumann-Godo, M.
   Norris, J. P.
   Nuss, E.
   Ohsugi, T.
   Orienti, M.
   Orlando, E.
   Ormes, J. F.
   Paneque, D.
   Panetta, J. H.
   Pesce-Rollins, M.
   Pierbattista, M.
   Piron, F.
   Pivato, G.
   Poon, H.
   Raino, S.
   Rando, R.
   Razzano, M.
   Razzaque, S.
   Reimer, A.
   Reimer, O.
   Romoli, C.
   Sbarra, C.
   Scargle, J. D.
   Sgro, C.
   Siskind, E. J.
   Spandre, G.
   Spinelli, P.
   Stawarz, Lukasz
   Strong, A. W.
   Suson, D. J.
   Tajima, H.
   Takahashi, H.
   Tanaka, T.
   Thayer, J. G.
   Thayer, J. B.
   Tibaldo, L.
   Tinivella, M.
   Tosti, G.
   Troja, E.
   Usher, T. L.
   Vandenbroucke, J.
   Vasileiou, V.
   Vianello, G.
   Vitale, V.
   Waite, A. P.
   Wallace, E.
   Wood, K. S.
   Wood, M.
   Yang, Z.
   Zaharijas, G.
   Zimmer, S.
TI CONSTRAINTS ON THE GALACTIC HALO DARK MATTER FROM FERMI-LAT DIFFUSE
   MEASUREMENTS
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE dark matter; Galaxy: halo; gamma rays: diffuse background; methods:
   statistical
ID LARGE-AREA TELESCOPE; GAMMA-RAY EMISSION; MILKY-WAY HALO; SOURCE
   CATALOG; GALAXY; RADIATION; DENSITY; MODELS; SUBSTRUCTURE; ANNIHILATION
AB We have performed an analysis of the diffuse gamma-ray emission with the Fermi Large Area Telescope (LAT) in the Milky Way halo region, searching for a signal from dark matter annihilation or decay. In the absence of a robust dark matter signal, constraints are presented. We consider both gamma rays produced directly in the dark matter annihilation/decay and produced by inverse Compton scattering of the e(+)/e(-) produced in the annihilation/decay. Conservative limits are derived requiring that the dark matter signal does not exceed the observed diffuse gamma-ray emission. A second set of more stringent limits is derived based on modeling the foreground astrophysical diffuse emission using the GALPROP code. Uncertainties in the height of the diffusive cosmic-ray halo, the distribution of the cosmic-ray sources in the Galaxy, the index of the injection cosmic-ray electron spectrum, and the column density of the interstellar gas are taken into account using a profile likelihood formalism, while the parameters governing the cosmic-ray propagation have been derived from fits to local cosmic-ray data. The resulting limits impact the range of particle masses over which dark matter thermal production in the early universe is possible, and challenge the interpretation of the PAMELA/Fermi-LAT cosmic ray anomalies as the annihilation of dark matter.
C1 [Ackermann, M.] Deutsch Elektronen Synchrotron DESY, D-15738 Zeuthen, Germany.
   [Ajello, M.; Bechtol, K.; Blandford, R. D.; Bloom, E. D.; Borgland, A. W.; Bottacini, E.; Buehler, R.; Cameron, R. A.; Charles, E.; Chekhtman, A.; Chiang, J.; Claus, R.; do Couto e Silva, E.; Drell, P. S.; Drlica-Wagner, A.; Focke, W. B.; Funk, S.; Glanzman, T.; Godfrey, G.; Hayashida, M.; Jogler, T.; Johnson, A. S.; Kamae, T.; Lande, J.; Michelson, P. F.; Mitthumsiri, W.; Monzani, M. E.; Moskalenko, I. V.; Murgia, S.; Orlando, E.; Paneque, D.; Panetta, J. H.; Reimer, A.; Reimer, O.; Tajima, H.; Tanaka, T.; Thayer, J. G.; Thayer, J. B.; Usher, T. L.; Vandenbroucke, J.; Vianello, G.; Waite, A. P.; Wood, M.] Stanford Univ, Dept Phys, Kavli Inst Particle Astrophys & Cosmol, WW Hansen Expt Phys Lab, Stanford, CA 94305 USA.
   [Ajello, M.; Bechtol, K.; Blandford, R. D.; Bloom, E. D.; Borgland, A. W.; Bottacini, E.; Buehler, R.; Cameron, R. A.; Charles, E.; Chiang, J.; Claus, R.; do Couto e Silva, E.; Drell, P. S.; Drlica-Wagner, A.; Focke, W. B.; Funk, S.; Glanzman, T.; Godfrey, G.; Hayashida, M.; Jogler, T.; Johnson, A. S.; Kamae, T.; Lande, J.; Michelson, P. F.; Mitthumsiri, W.; Monzani, M. E.; Moskalenko, I. V.; Murgia, S.; Orlando, E.; Paneque, D.; Panetta, J. H.; Reimer, A.; Reimer, O.; Tajima, H.; Tanaka, T.; Thayer, J. G.; Thayer, J. B.; Usher, T. L.; Vandenbroucke, J.; Vianello, G.; Waite, A. P.; Wood, M.] Stanford Univ, SLAC Natl Accelerator Lab, Stanford, CA 94305 USA.
   [Ajello, M.] Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA.
   [Atwood, W. B.; Razzano, M.] Univ Calif Santa Cruz, Dept Phys, Santa Cruz Inst Particle Phys, Santa Cruz, CA 95064 USA.
   [Atwood, W. B.; Razzano, M.] Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA.
   [Baldini, L.] Univ Pisa, I-56127 Pisa, Italy.
   [Baldini, L.; Bellazzini, R.; Bregeon, J.; Kuss, M.; Pesce-Rollins, M.; Razzano, M.; Sgro, C.; Spandre, G.; Tinivella, M.] Ist Nazl Fis Nucl, Sez Pisa, I-56127 Pisa, Italy.
   [Barbiellini, G.; Longo, F.] Ist Nazl Fis Nucl, Sez Trieste, I-34127 Trieste, Italy.
   [Barbiellini, G.; Longo, F.] Univ Trieste, Dipartimento Fis, I-34127 Trieste, Italy.
   [Bastieri, D.; Buson, S.; Gustafsson, M.; Rando, R.; Sbarra, C.; Tibaldo, L.] Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.
   [Bastieri, D.; Buson, S.; Pivato, G.; Poon, H.; Rando, R.; Romoli, C.; Tibaldo, L.] Univ Padua, Dipartimento Fis & Astron G Galilei, I-35131 Padua, Italy.
   [Bonamente, E.; Cecchi, C.; D'Ammando, F.; Germani, S.; Lubrano, P.; Tosti, G.] Ist Nazl Fis Nucl, Sez Perugia, I-06123 Perugia, Italy.
   [Bonamente, E.; Cecchi, C.; Ciprini, S.; Germani, S.; Lubrano, P.; Tosti, G.] Univ Perugia, Dipartimento Fis, I-06123 Perugia, Italy.
   [Brandt, T. J.; Guiriec, S.; McEnery, J. E.; Moiseev, A. A.; Troja, E.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
   [Brigida, M.; de Palma, F.; Favuzzi, C.; Fusco, P.; Giglietto, N.; Giordano, F.; Loparco, F.; Monte, C.; Raino, S.; Spinelli, P.] Univ Bari, Dipartimento Fis M Merlin, I-70126 Bari, Italy.
   [Brigida, M.; de Palma, F.; Favuzzi, C.; Fusco, P.; Giglietto, N.; Giordano, F.; Loparco, F.; Monte, C.; Raino, S.; Spinelli, P.] Politecn Bari, I-70126 Bari, Italy.
   [Brigida, M.; de Palma, F.; Favuzzi, C.; Fusco, P.; Gargano, F.; Giglietto, N.; Giordano, F.; Loparco, F.; Mazziotta, M. N.; Monte, C.; Raino, S.; Spinelli, P.] Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy.
   [Bruel, P.; Fegan, S. J.; Horan, D.] Ecole Polytech, CNRS, Lab Leprince Ringuet, IN2P3, F-91128 Palaiseau, France.
   [Caliandro, G. A.; Hadasch, D.] Inst Ciencies Espai IEEE CSIC, E-08193 Barcelona, Spain.
   [Caraveo, P. A.] INAF Ist Astrofis Spaziale & Fis Cosm, I-20133 Milan, Italy.
   [Casandjian, J. M.; Grenier, I. A.; Naumann-Godo, M.; Pierbattista, M.] Univ Paris Diderot, CEA Saclay, Serv Astrophys, Lab AIM,CEA IRFU,CNRS, F-91191 Gif Sur Yvette, France.
   [Chekhtman, A.; Razzaque, S.; Wood, K. S.] George Mason Univ, Ctr Earth Observing & Space Res, Coll Sci, Fairfax, VA 22030 USA.
   [Ciprini, S.] ASI Sci Data Ctr, I-00044 Frascati, Roma, Italy.
   [Cohen-Tanugi, J.; Falletti, L.; Mehault, J.; Nuss, E.; Piron, F.; Vasileiou, V.] Univ Montpellier 2, CNRS, IN2P3, Lab Univers & Particules Montpellier, Montpellier, France.
   [Conrad, J.; Garde, M. Llena; Yang, Z.; Zaharijas, G.; Zimmer, S.] Stockholm Univ, Dept Phys, AlbaNova, SE-10691 Stockholm, Sweden.
   [Conrad, J.; Cuoco, A.; Jackson, M. S.; Garde, M. Llena; Yang, Z.; Zaharijas, G.; Zimmer, S.] AlbaNova, Oskar Klein Ctr Cosmoparticle Phys, SE-10691 Stockholm, Sweden.
   [Cutini, S.; Gasparrini, D.] Agenzia Spaziale Italiana ASI Sci Data Ctr, I-00044 Frascati, Roma, Italy.
   [D'Ammando, F.] IASF Palermo, I-90146 Palermo, Italy.
   [D'Ammando, F.] INAF Ist Astrofis Spaziale & Fis Cosm, I-00133 Rome, Italy.
   [de Angelis, A.] Univ Udine, Dipartimento Fis, I-33100 Udine, Italy.
   [de Angelis, A.] Ist Nazl Fis Nucl, Sez Trieste, Grp Collegato Udine, I-33100 Udine, Italy.
   [Dermer, C. D.; Lovellette, M. N.] USN, Div Space Sci, Res Lab, Washington, DC 20375 USA.
   [Fukazawa, Y.; Takahashi, H.] Hiroshima Univ, Dept Phys Sci, Hiroshima 7398526, Japan.
   [Giroletti, M.; Orienti, M.] INAF Ist Radioastron, I-40129 Bologna, Italy.
   [Hayashida, M.] Kyoto Univ, Grad Sch Sci, Dept Astron, Sakyo Ku, Kyoto 6068502, Japan.
   [Hughes, R. E.] Ohio State Univ, Dept Phys, Ctr Cosmol & Astroparticle Phys, Columbus, OH 43210 USA.
   [Jackson, M. S.] Royal Inst Technol KTH, Dept Phys, AlbaNova, SE-10691 Stockholm, Sweden.
   [Johannesson, G.] Univ Iceland, Inst Sci, IS-107 Reykjavik, Iceland.
   [Knoedlseder, J.] CNRS, IRAP, F-31028 Toulouse 4, France.
   [Knoedlseder, J.] Univ Toulouse, UPS OMP, GAHEC, IRAP, Toulouse, France.
   [Latronico, L.] Ist Nazl Fis Nucl, Sez Torino, I-10125 Turin, Italy.
   [Lionetto, A. M.; Morselli, A.; Vitale, V.] Ist Nazl Fis Nucl, Sez Roma Tor Vergata, I-00133 Rome, Italy.
   [Lionetto, A. M.; Vitale, V.] Univ Roma Tor Vergata, Dipartimento Fis, I-00133 Rome, Italy.
   [Lott, B.] Univ Bordeaux 1, CNRS, IN2P3, Ctr Etud Nucl Bordeaux Gradignan, F-33175 Gradignan, France.
   [McEnery, J. E.; Moiseev, A. A.] Univ Maryland, Dept Phys, College Pk, MD 20742 USA.
   [McEnery, J. E.; Moiseev, A. A.] Univ Maryland, Dept Astron, College Pk, MD 20742 USA.
   [Mizuno, T.; Ohsugi, T.] Hiroshima Univ, Hiroshima Astrophys Sci Ctr, Hiroshima 7398526, Japan.
   [Moiseev, A. A.] Ctr Res & Explorat Space Sci & Technol CRESST, Greenbelt, MD 20771 USA.
   [Norris, J. P.] Boise State Univ, Dept Phys, Boise, ID 83725 USA.
   [Ormes, J. F.] Univ Denver, Dept Phys & Astron, Denver, CO 80208 USA.
   [Paneque, D.] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany.
   [Reimer, A.; Reimer, O.] Leopold Franzens Univ Innsbruck, Inst Theoret Phys, A-6020 Innsbruck, Austria.
   [Reimer, A.; Reimer, O.] Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria.
   [Scargle, J. D.] NASA, Div Space Sci, Ames Res Ctr, Moffett Field, CA 94035 USA.
   [Siskind, E. J.] NYCB Real Time Comp Inc, Lattingtown, NY 11560 USA.
   [Stawarz, Lukasz] JAXA, Inst Space & Astronaut Sci, Chuo Ku, Sagamihara, Kanagawa 2525210, Japan.
   [Stawarz, Lukasz] Jagiellonian Univ, Astron Observ, PL-30244 Krakow, Poland.
   [Strong, A. W.] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany.
   [Suson, D. J.] Purdue Univ Calumet, Dept Chem & Phys, Hammond, IN 46323 USA.
   [Tajima, H.] Nagoya Univ, Solar Terr Environm Lab, Nagoya, Aichi 4648601, Japan.
   [Vianello, G.] CIFS, I-10133 Turin, Italy.
   [Wallace, E.] Univ Washington, Dept Phys, Seattle, WA 98195 USA.
   [Zaharijas, G.] CEA Saclay, Inst Phys Theor, F-91191 Gif Sur Yvette, France.
RP Ackermann, M (reprint author), Deutsch Elektronen Synchrotron DESY, D-15738 Zeuthen, Germany.
EM conrad@fysik.su.se; cuoco@fysik.su.se; yang.395@mps.ohio-state.edu;
   gzah@physto.se
RI Reimer, Olaf/A-3117-2013; Moskalenko, Igor/A-1301-2007; Mazziotta, Mario
   /O-8867-2015; Sgro, Carmelo/K-3395-2016; Orlando, E/R-5594-2016; Tosti,
   Gino/E-9976-2013; Rando, Riccardo/M-7179-2013; Morselli,
   Aldo/G-6769-2011; Funk, Stefan/B-7629-2015; Johannesson,
   Gudlaugur/O-8741-2015; Loparco, Francesco/O-8847-2015; Gargano,
   Fabio/O-8934-2015; giglietto, nicola/I-8951-2012; 
OI Gasparrini, Dario/0000-0002-5064-9495; Baldini,
   Luca/0000-0002-9785-7726; Caraveo, Patrizia/0000-0003-2478-8018; Sgro',
   Carmelo/0000-0001-5676-6214; Zaharijas, Gabrijela/0000-0001-8484-7791;
   SPINELLI, Paolo/0000-0001-6688-8864; Rando,
   Riccardo/0000-0001-6992-818X; Bastieri, Denis/0000-0002-6954-8862;
   Pesce-Rollins, Melissa/0000-0003-1790-8018; orienti,
   monica/0000-0003-4470-7094; Giroletti, Marcello/0000-0002-8657-8852;
   Reimer, Olaf/0000-0001-6953-1385; Moskalenko, Igor/0000-0001-6141-458X;
   Mazziotta, Mario /0000-0001-9325-4672; Morselli,
   Aldo/0000-0002-7704-9553; Funk, Stefan/0000-0002-2012-0080; Johannesson,
   Gudlaugur/0000-0003-1458-7036; Loparco, Francesco/0000-0002-1173-5673;
   Gargano, Fabio/0000-0002-5055-6395; giglietto,
   nicola/0000-0002-9021-2888; De Angelis, Alessandro/0000-0002-3288-2517
FU K. A. Wallenberg Foundation
FX Royal Swedish Academy of Sciences Research Fellow, funded by a grant
   from the K. A. Wallenberg Foundation.
NR 75
TC 100
Z9 100
U1 5
U2 26
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD DEC 20
PY 2012
VL 761
IS 2
AR 91
DI 10.1088/0004-637X/761/2/91
PG 18
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 050YH
UT WOS:000312090300010
ER

PT J
AU Casey, CM
   Berta, S
   Bethermin, M
   Bock, J
   Bridge, C
   Burgarella, D
   Chapin, E
   Chapman, SC
   Clements, DL
   Conley, A
   Conselice, CJ
   Cooray, A
   Farrah, D
   Hatziminaoglou, E
   Ivison, RJ
   le Floc'h, E
   Lutz, D
   Magdis, G
   Magnelli, B
   Oliver, SJ
   Page, MJ
   Pozzi, F
   Rigopoulou, D
   Riguccini, L
   Roseboom, IG
   Sanders, DB
   Scott, D
   Seymour, N
   Valtchanov, I
   Vieira, JD
   Viero, M
   Wardlow, J
AF Casey, C. M.
   Berta, S.
   Bethermin, M.
   Bock, J.
   Bridge, C.
   Burgarella, D.
   Chapin, E.
   Chapman, S. C.
   Clements, D. L.
   Conley, A.
   Conselice, C. J.
   Cooray, A.
   Farrah, D.
   Hatziminaoglou, E.
   Ivison, R. J.
   le Floc'h, E.
   Lutz, D.
   Magdis, G.
   Magnelli, B.
   Oliver, S. J.
   Page, M. J.
   Pozzi, F.
   Rigopoulou, D.
   Riguccini, L.
   Roseboom, I. G.
   Sanders, D. B.
   Scott, Douglas
   Seymour, N.
   Valtchanov, I.
   Vieira, J. D.
   Viero, M.
   Wardlow, J.
TI A POPULATION OF z > 2 FAR-INFRARED HERSCHEL-Spire-SELECTED STARBURSTS
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE galaxies: evolution; galaxies: high-redshift; galaxies: starburst;
   infrared: galaxies; submillimeter: galaxies
ID STAR-FORMING GALAXIES; DEEP-FIELD-SOUTH; SUBMILLIMETER-SELECTED
   GALAXIES; HIGH-REDSHIFT GALAXIES; PHOTOMETRIC REDSHIFTS; ULTRALUMINOUS
   GALAXIES; FORMATION HISTORY; MIDINFRARED SPECTROSCOPY; SPACE-TELESCOPE;
   SCUBA GALAXIES
AB We present spectroscopic observations for a sample of 36 Herschel-Spire 250-500 mu m selected galaxies (HSGs) at 2 < z < 5 from the Herschel Multi-tiered Extragalactic Survey. Redshifts are confirmed as part of a large redshift survey of Herschel-Spire-selected sources covering similar to 0.93 deg(2) in six extragalactic legacy fields. Observations were taken with the Keck I Low Resolution Imaging Spectrometer and the Keck II DEep Imaging Multi-Object Spectrograph. Precise astrometry, needed for spectroscopic follow-up, is determined by identification of counterparts at 24 mu m or 1.4 GHz using a cross-identification likelihood matching method. Individual source luminosities range from log(L-IR/L-circle dot) = 12.5-13.6 (corresponding to star formation rates (SFRs) 500-9000M(circle dot) yr(-1), assuming a Salpeter initial mass function), constituting some of the most intrinsically luminous, distant infrared galaxies discovered thus far. We present both individual and composite rest-frame ultraviolet spectra and infrared spectral energy distributions. The selection of these HSGs is reproducible and well characterized across large areas of the sky in contrast to most z > 2 HyLIRGs in the literature, which are detected serendipitously or via tailored surveys searching only for high-z HyLIRGs; therefore, we can place lower limits on the contribution of HSGs to the cosmic star formation rate density (SFRD) at (7 +/- 2) x 10(-3) M-circle dot yr(-1) h(3) Mpc(-3) at z similar to 2.5, which is > 10% of the estimated total SFRD of the universe from optical surveys. The contribution at z similar to 4 has a lower limit of 3 x 10(-3) M-circle dot yr(-1) h(3) Mpc(-3), greater than or similar to 20% of the estimated total SFRD. This highlights the importance of extremely infrared-luminous galaxies with high SFRs to the buildup of stellar mass, even at the earliest epochs.
C1 [Casey, C. M.; Sanders, D. B.] Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA.
   [Berta, S.; Lutz, D.; Magnelli, B.] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany.
   [Bethermin, M.; le Floc'h, E.; Magdis, G.; Riguccini, L.] Univ Paris Diderot, CE Saclay, CNRS, Lab AIM Paris Saclay,CEA DSM Irfu, F-91191 Gif Sur Yvette, France.
   [Bethermin, M.] Univ Paris 11, Inst Astrophys Spatiale, F-91405 Orsay, France.
   [Bethermin, M.] CNRS, UMR 8617, F-91405 Orsay, France.
   [Bock, J.; Bridge, C.; Cooray, A.; Vieira, J. D.; Viero, M.] CALTECH, Cahill Ctr Astron & Astrophys, Pasadena, CA 91125 USA.
   [Bock, J.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
   [Burgarella, D.] Univ Aix Marseille, LAM, F-13388 Marseille 13, France.
   [Burgarella, D.] CNRS, UMR7326, F-13388 Marseille 13, France.
   [Chapin, E.; Scott, Douglas] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada.
   [Chapin, E.; Valtchanov, I.] European Space Astron Ctr, E-28691 Madrid, Spain.
   [Chapman, S. C.] Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England.
   [Chapman, S. C.] Dalhousie Univ, Dept Phys & Atmospher Sci, Halifax, NS B3H 4R2, Canada.
   [Clements, D. L.] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, Astrophys Grp, London SW7 2AZ, England.
   [Conley, A.] Univ Colorado, Ctr Astrophys & Space Astron UCB 389, Boulder, CO 80309 USA.
   [Conselice, C. J.] Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England.
   [Cooray, A.; Wardlow, J.] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA.
   [Farrah, D.] Virginia Tech, Dept Phys, Blacksburg, VA 24061 USA.
   [Hatziminaoglou, E.] ESO, D-85748 Garching, Germany.
   [Ivison, R. J.] Royal Observ, UK Astron Technol Ctr, Edinburgh EH9 3HJ, Midlothian, Scotland.
   [Ivison, R. J.; Roseboom, I. G.] Univ Edinburgh, Royal Observ, Inst Astron, Edinburgh EH9 3HJ, Midlothian, Scotland.
   [Magdis, G.; Rigopoulou, D.] Univ Oxford, Dept Astrophys, Oxford OX1 3RH, England.
   [Oliver, S. J.; Roseboom, I. G.] Univ Sussex, Dept Phys & Astron, Ctr Astron, Brighton BN1 9QH, E Sussex, England.
   [Page, M. J.; Seymour, N.] Univ Coll London, Mullard Space Sci Lab, Dorking RH5 6NT, Surrey, England.
   [Pozzi, F.] Dipartimento Fis & Astron, I-40127 Bologna, Italy.
   [Rigopoulou, D.] Rutherford Appleton Lab, RAL Space, Didcot OX11 0QX, Oxon, England.
   [Riguccini, L.] NASA Ames, Moffett Field, CA 94035 USA.
   [Seymour, N.] CSIRO Astron & Space Sci, Epping, NSW 1710, Australia.
RP Casey, CM (reprint author), Univ Hawaii, Inst Astron, 2680 Woodlawn Dr, Honolulu, HI 96822 USA.
RI Conselice, Christopher/B-4348-2013; Magdis, Georgios/C-7295-2014;
   Wardlow, Julie/C-9903-2015; Ivison, R./G-4450-2011; 
OI Magdis, Georgios/0000-0002-4872-2294; Wardlow,
   Julie/0000-0003-2376-8971; Ivison, R./0000-0001-5118-1313; Scott,
   Douglas/0000-0002-6878-9840; Seymour, Nicholas/0000-0003-3506-5536;
   Casey, Caitlin/0000-0002-0930-6466; Conselice,
   Christopher/0000-0003-1949-7638; Bethermin, Matthieu/0000-0002-3915-2015
FU Space Telescope Science Institute [HST-HF-51268.01-A]; W. M. Keck
   Foundation; NSF [AST-0071048]; CSA (Canada); NAOC (China); CEA (France);
   CNES (France); CNRS (France); ASI (Italy); MCINN (Spain); SNSB (Sweden);
   STFC (UK); UKSA (UK); NASA (USA)
FX C.M.C. is generously supported by a Hubble Fellowship from Space
   Telescope Science Institute, grant HST-HF-51268.01-A. The data presented
   herein were obtained at the W. M. Keck Observatory, which is operated as
   a scientific partnership among the California Institute of Technology,
   the University of California, and the National Aeronautics and Space
   Administration. The Observatory was made possible by the generous
   financial support of the W. M. Keck Foundation. The authors recognize
   and acknowledge the very significant cultural role and reverence that
   the summit of Mauna Kea has always had within the indigenous Hawaiian
   community. We are most fortunate to have the opportunity to conduct
   observations from this mountain. This work would not be possible without
   the hard work and dedication of the Keck Observatory night and day
   staff; special thanks to Marc Kassis, Luca Rizzi, and Greg Wirth for
   help and advice while observing. The analysis pipeline used to reduce
   the DEIMOS data was developed at UC Berkeley with support from NSF grant
   AST-0071048.; Spire has been developed by a consortium of institutes led
   by Cardiff Univ. (UK) and including: Univ. Lethbridge (Canada); NAOC
   (China); CEA, LAM (France); IFSI and Univ. Padua (Italy); IAC (Spain);
   Stockholm Observatory (Sweden); Imperial College London, RAL, UCL-MSSL,
   UKATC, and Univ. Sussex (UK); and Caltech, JPL, NHSC, and Univ. Colorado
   (USA). This development has been supported by national funding agencies:
   CSA (Canada); NAOC (China); CEA, CNES, CNRS (France); ASI (Italy); MCINN
   (Spain); SNSB (Sweden); STFC, UKSA (UK); and NASA (USA).
NR 93
TC 31
Z9 31
U1 0
U2 11
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD DEC 20
PY 2012
VL 761
IS 2
AR 139
DI 10.1088/0004-637X/761/2/139
PG 24
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 050YH
UT WOS:000312090300058
ER

PT J
AU Casey, CM
   Berta, S
   Bethermin, M
   Bock, J
   Bridge, C
   Budynkiewicz, J
   Burgarella, D
   Chapin, E
   Chapman, SC
   Clements, DL
   Conley, A
   Conselice, CJ
   Cooray, A
   Farrah, D
   Hatziminaoglou, E
   Ivison, RJ
   le Floc'h, E
   Lutz, D
   Magdis, G
   Magnelli, B
   Oliver, SJ
   Page, MJ
   Pozzi, F
   Rigopoulou, D
   Riguccini, L
   Roseboom, IG
   Sanders, DB
   Scott, D
   Seymour, N
   Valtchanov, I
   Vieira, JD
   Viero, M
   Wardlow, J
AF Casey, C. M.
   Berta, S.
   Bethermin, M.
   Bock, J.
   Bridge, C.
   Budynkiewicz, J.
   Burgarella, D.
   Chapin, E.
   Chapman, S. C.
   Clements, D. L.
   Conley, A.
   Conselice, C. J.
   Cooray, A.
   Farrah, D.
   Hatziminaoglou, E.
   Ivison, R. J.
   le Floc'h, E.
   Lutz, D.
   Magdis, G.
   Magnelli, B.
   Oliver, S. J.
   Page, M. J.
   Pozzi, F.
   Rigopoulou, D.
   Riguccini, L.
   Roseboom, I. G.
   Sanders, D. B.
   Scott, Douglas
   Seymour, N.
   Valtchanov, I.
   Vieira, J. D.
   Viero, M.
   Wardlow, J.
TI A REDSHIFT SURVEY OF HERSCHEL FAR-INFRARED SELECTED STARBURSTS AND
   IMPLICATIONS FOR OBSCURED STAR FORMATION
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE galaxies: evolution; galaxies: high-redshift; galaxies: starburst;
   infrared: galaxies; submillimeter: galaxies
ID DEEP-FIELD-SOUTH; SIMILAR-TO 2; SUBMILLIMETER GALAXY POPULATION;
   ULTRAVIOLET LUMINOSITY DENSITY; SPECTRAL ENERGY-DISTRIBUTION; METREWAVE
   RADIO TELESCOPE; MU-M OBSERVATIONS; SCUBA SUPER-MAP; LESS-THAN 2;
   FORMING GALAXIES
AB We present Keck spectroscopic observations and redshifts for a sample of 767 Herschel-SPIRE selected galaxies (HSGs) at 250, 350, and 500 mu m, taken with the Keck I Low Resolution Imaging Spectrometer and the Keck II DEep Imaging Multi-Object Spectrograph. The redshift distribution of these SPIRE sources from the Herschel Multitiered Extragalactic Survey peaks at z = 0.85, with 731 sources at z < 2 and a tail of sources out to z similar to 5. We measure more significant disagreement between photometric and spectroscopic redshifts (<Delta z/(1 + z(spec))> = 0.29) than is seen in non-infrared selected samples, likely due to enhanced star formation rates and dust obscuration in infrared-selected galaxies. The infrared data are used to directly measure integrated infrared luminosities and dust temperatures independent of radio or 24 mu m flux densities. By probing the dust spectral energy distribution (SED) at its peak, we estimate that the vast majority (72%-83%) of z < 2 Herschel-selected galaxies would drop out of traditional submillimeter surveys at 0.85-1 mm. We find that dust temperature traces infrared luminosity, due in part to the SPIRE wavelength selection biases, and partially from physical effects. As a result, we measure no significant trend in SPIRE color with redshift; if dust temperature were independent of luminosity or redshift, a trend in SPIRE color would be expected. Composite infrared SEDs are constructed as a function of infrared luminosity, showing the increase in dust temperature with luminosity, and subtle change in near-infrared and mid-infrared spectral properties. Moderate evolution in the far-infrared (FIR)/radio correlation is measured for this partially radio-selected sample, with q(IR) proportional to (1 + z)(-0.30 +/- 0.02) at z < 2. We estimate the luminosity function and implied star formation rate density contribution of HSGs at z < 1.6 and find overall agreement with work based on 24 mu m extrapolations of the LIRG, ULIRG, and total infrared contributions. This work significantly increased the number of spectroscopically confirmed infrared-luminous galaxies at z >> 0 and demonstrates the growing importance of dusty starbursts for galaxy evolution studies and the build-up of stellar mass throughout cosmic time.
C1 [Casey, C. M.; Budynkiewicz, J.; Sanders, D. B.] Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA.
   [Berta, S.; Lutz, D.; Magnelli, B.] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany.
   [Bethermin, M.; le Floc'h, E.; Magdis, G.; Riguccini, L.] Univ Paris Diderot, CE Saclay, CNRS, Lab AIM Paris Saclay,CEA DSM Irfu, F-91191 Gif Sur Yvette, France.
   [Bethermin, M.] Univ Paris 11, Inst Astrophys Spatiale, F-91405 Orsay, France.
   [Bethermin, M.] CNRS, UMR 8617, F-91405 Orsay, France.
   [Bock, J.; Bridge, C.; Cooray, A.; Vieira, J. D.; Viero, M.] CALTECH, Pasadena, CA 91125 USA.
   [Bock, J.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
   [Budynkiewicz, J.] Univ Massachusetts, Dept Astron, Amherst, MA 01003 USA.
   [Burgarella, D.] Univ Aix Marseille, LAM, F-13388 Marseille 13, France.
   [Burgarella, D.] CNRS, UMR7326, F-13388 Marseille 13, France.
   [Chapin, E.; Scott, Douglas] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada.
   [Chapin, E.; Valtchanov, I.] European Space Astron Ctr, Herschel Sci Ctr, Madrid 28691, Spain.
   [Chapman, S. C.] Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England.
   [Chapman, S. C.] Dalhousie Univ, Dept Phys & Atmospher Sci, Halifax, NS B3H 4R2, Canada.
   [Clements, D. L.] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, Astrophys Grp, London SW7 2AZ, England.
   [Conley, A.] Univ Colorado, Ctr Astrophys & Space Astron UCB 389, Boulder, CO 80309 USA.
   [Conselice, C. J.] Univ Nottingham, Sch Phys & Astron, Nottingham NG7 2RD, England.
   [Cooray, A.; Wardlow, J.] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA.
   [Farrah, D.] Virginia Tech, Dept Phys, Blacksburg, VA 24061 USA.
   [Hatziminaoglou, E.] ESO, D-85748 Garching, Germany.
   [Ivison, R. J.] Royal Observ, UK Astron Technol Ctr, Edinburgh EH9 3HJ, Midlothian, Scotland.
   [Ivison, R. J.; Roseboom, I. G.] Univ Edinburgh, Royal Observ, Inst Astron, Edinburgh EH9 3HJ, Midlothian, Scotland.
   [Magdis, G.; Rigopoulou, D.] Univ Oxford, Dept Astrophys, Oxford OX1 3RH, England.
   [Oliver, S. J.; Roseboom, I. G.] Univ Sussex, Dept Phys & Astron, Ctr Astron, Brighton BN1 9QH, E Sussex, England.
   [Page, M. J.; Seymour, N.] Univ Coll London, Mullard Space Sci Lab, Dorking RH5 6NT, Surrey, England.
   [Pozzi, F.] Dipartimento Fis & Astron, I-40127 Bologna, Italy.
   [Rigopoulou, D.] Rutherford Appleton Lab, RAL Space, Didcot OX11 0QX, Oxon, England.
   [Riguccini, L.] NASA Ames, Moffett Field, CA 94035 USA.
   [Seymour, N.] CSIRO Astron & Space Sci, Epping, NSW 1710, Australia.
RP Casey, CM (reprint author), Univ Hawaii, Inst Astron, 2680 Woodlawn Dr, Honolulu, HI 96822 USA.
RI Conselice, Christopher/B-4348-2013; Magdis, Georgios/C-7295-2014;
   Wardlow, Julie/C-9903-2015; Ivison, R./G-4450-2011; 
OI Magdis, Georgios/0000-0002-4872-2294; Wardlow,
   Julie/0000-0003-2376-8971; Ivison, R./0000-0001-5118-1313; Scott,
   Douglas/0000-0002-6878-9840; Seymour, Nicholas/0000-0003-3506-5536;
   Casey, Caitlin/0000-0002-0930-6466; Conselice,
   Christopher/0000-0003-1949-7638; Bethermin, Matthieu/0000-0002-3915-2015
FU Space Telescope Science Institute [HST-HF-51268.01-A]; W. M. Keck
   Foundation; NSF [AST-0071048]; CSA (Canada); NAOC (China); CEA (France);
   CNES (France); CNRS (France); ASI (Italy); MCINN (Spain); SNSB (Sweden);
   STFC (UK); UKSA (UK); NASA (USA)
FX We thank the anonymous reviewer for a very useful, constructive report
   that improved the manuscript. C. M. C. is generously supported by a
   Hubble Fellowship from Space Telescope Science Institute, grant
   HST-HF-51268.01-A. The data presented herein were obtained at the W. M.
   Keck Observatory, which is operated as a scientific partnership among
   the California Institute of Technology, the University of California and
   the National Aeronautics and Space Administration. The Observatory was
   made possible by the generous financial support of the W. M. Keck
   Foundation. The authors wish to recognize and acknowledge the very
   significant cultural role and reverence that the summit of Mauna Kea has
   always had within the indigenous Hawaiian community. We are most
   fortunate to have the opportunity to conduct observations from this
   mountain. This work would not be possible without the hard work and
   dedication of the Keck Observatory night and day staff; special thanks
   to Marc Kassis, Luca Rizzi and Greg Wirth for help and advice while
   observing. The analysis pipeline used to reduce the DEIMOS data was
   developed at UC Berkeley with support from NSF grant AST-0071048. Thanks
   to Nick Scoville and Brian Siana for useful discussions which improved
   the paper.; SPIRE has been developed by a consortium of institutes led
   by Cardiff Univ. (UK) and including: Univ. Lethbridge (Canada); NAOC
   (China); CEA, LAM (France); IFSI, Univ. Padua (Italy); IAC (Spain);
   Stockholm Observatory (Sweden); Imperial College London, RAL, UCL-MSSL,
   UKATC, Univ. Sussex (UK); and Caltech, JPL, NHSC, Univ. Colorado (USA).
   This development has been supported by national funding agencies: CSA
   (Canada); NAOC (China); CEA, CNES, CNRS (France); ASI (Italy); MCINN
   (Spain); SNSB (Sweden); STFC, UKSA (UK); and NASA (USA).
NR 113
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U1 0
U2 13
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
EI 1538-4357
J9 ASTROPHYS J
JI Astrophys. J.
PD DEC 20
PY 2012
VL 761
IS 2
AR 140
DI 10.1088/0004-637X/761/2/140
PG 24
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 050YH
UT WOS:000312090300059
ER

PT J
AU Chomiuk, L
   Krauss, MI
   Rupen, MP
   Nelson, T
   Roy, N
   Sokoloski, JL
   Mukai, K
   Munari, U
   Mioduszewski, A
   Weston, J
   O'Brien, TJ
   Eyres, SPS
   Bode, MF
AF Chomiuk, Laura
   Krauss, Miriam I.
   Rupen, Michael P.
   Nelson, Thomas
   Roy, Nirupam
   Sokoloski, Jennifer L.
   Mukai, Koji
   Munari, Ulisse
   Mioduszewski, Amy
   Weston, Jennifer
   O'Brien, Tim J.
   Eyres, Stewart P. S.
   Bode, Michael F.
TI THE RADIO LIGHT CURVE OF THE GAMMA-RAY NOVA IN V407 CYG: THERMAL
   EMISSION FROM THE IONIZED SYMBIOTIC ENVELOPE, DEVOURED FROM WITHIN BY
   THE NOVA BLAST
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE binaries: symbiotic; novae, cataclysmic variables; radio continuum:
   stars; stars: individual (V407 Cygni)
ID PERIOD-LUMINOSITY RELATION; MASS-LOSS RATES; RS-OPHIUCHI; IA SUPERNOVAE;
   RECURRENT NOVA; 2006 OUTBURST; CIRCUMSTELLAR MATERIAL; PROGENITOR
   SYSTEM; CLASSICAL NOVAE; BINARY-SYSTEMS
AB We present multi-frequency radio observations of the 2010 nova event in the symbiotic binary V407 Cygni, obtained with the Karl G. Jansky Very Large Array (VLA) and spanning 1-45 GHz and 17-770 days following discovery. This nova-the first ever detected in gamma rays-shows a radio light curve dominated by the wind of the Mira giant companion, rather than the nova ejecta themselves. The radio luminosity grew as the wind became increasingly ionized by the nova outburst, and faded as the wind was violently heated from within by the nova shock. This study marks the first time that this physical mechanism has been shown to dominate the radio light curve of an astrophysical transient. We do not observe a thermal signature from the nova ejecta or synchrotron emission from the shock, due to the fact that these components were hidden behind the absorbing screen of the Mira wind. We estimate a mass-loss rate for the Mira wind of (M)over dot(w) approximate to 10(-6) M-circle dot yr(-1). We also present the only radio detection of V407 Cyg before the 2010 nova, gleaned from unpublished 1993 archival VLA data, which shows that the radio luminosity of the Mira wind varies by a factor of greater than or similar to 20 even in quiescence. Although V407 Cyg likely hosts a massive accreting white dwarf, making it a candidate progenitor system for a Type Ia supernova, the dense and radially continuous circumbinary material surrounding V407 Cyg is inconsistent with observational constraints on the environments of most Type Ia supernovae.
C1 [Chomiuk, Laura; Krauss, Miriam I.; Rupen, Michael P.; Roy, Nirupam; Mioduszewski, Amy] Natl Radio Astron Observ, Socorro, NM 87801 USA.
   [Chomiuk, Laura] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
   [Chomiuk, Laura] Michigan State Univ, Dept Phys & Astron, E Lansing, MI 48824 USA.
   [Nelson, Thomas] Univ Minnesota, Sch Phys & Astron, Minneapolis, MN 55455 USA.
   [Sokoloski, Jennifer L.; Weston, Jennifer] Columbia Univ, Columbia Astrophys Lab, New York, NY 10027 USA.
   [Mukai, Koji] NASA, Goddard Space Flight Ctr, CRESST, Greenbelt, MD 20771 USA.
   [Mukai, Koji] NASA, Goddard Space Flight Ctr, Xray Astrophys Lab, Greenbelt, MD 20771 USA.
   [Mukai, Koji] Univ Maryland Baltimore Cty, Ctr Space Sci & Technol, Baltimore, MD 21250 USA.
   [Munari, Ulisse] INAF Astron Observ Padova, I-36012 Asiago, VI, Italy.
   [O'Brien, Tim J.] Univ Manchester, Ctr Astrophys, Jodrell Bank, Manchester M13 9PL, Lancs, England.
   [Eyres, Stewart P. S.] Univ Cent Lancashire, Jeremiah Horrocks Inst, Preston PR1 2HE, Lancs, England.
   [Bode, Michael F.] Liverpool John Moores Univ, Astrophys Res Inst, Birkenhead CH41 1LD, Merseyside, England.
RP Chomiuk, L (reprint author), Natl Radio Astron Observ, POB O, Socorro, NM 87801 USA.
EM chomiuk@pa.msu.edu
OI Munari, Ulisse/0000-0001-6805-9664
NR 117
TC 20
Z9 20
U1 0
U2 7
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD DEC 20
PY 2012
VL 761
IS 2
AR 173
DI 10.1088/0004-637X/761/2/173
PG 19
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 050YH
UT WOS:000312090300092
ER

PT J
AU Crockett, CJ
   Mahmud, NI
   Prato, L
   Johns-Krull, CM
   Jaffe, DT
   Hartigan, PM
   Beichman, CA
AF Crockett, Christopher J.
   Mahmud, Naved I.
   Prato, L.
   Johns-Krull, Christopher M.
   Jaffe, Daniel T.
   Hartigan, Patrick M.
   Beichman, Charles A.
TI A SEARCH FOR GIANT PLANET COMPANIONS TO T TAURI STARS
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE planets and satellites: detection; stars: pre-main sequence; techniques:
   radial velocities
ID RADIAL-VELOCITY VARIABILITY; MAIN-SEQUENCE STARS; BROWN DWARF DESERT;
   KECK II TELESCOPE; ECHELLE SPECTROGRAPH; PHOTOMETRIC VARIABILITY;
   STELLAR ACTIVITY; MAGNETIC-FIELDS; MASS; PRECISION
AB We present results from an ongoing multiwavelength radial velocity (RV) survey of the Taurus-Auriga star-forming region as part of our effort to identify pre-main-sequence giant planet hosts. These 1-3 Myr old T Tauri stars present significant challenges to traditional RV surveys. The presence of strong magnetic fields gives rise to large, cool star spots. These spots introduce significant RV jitter which can mimic the velocity modulation from a planet-mass companion. To distinguish between spot-induced and planet-induced RV modulation, we conduct observations at similar to 6700 angstrom and similar to 2.3 mu m and measure the wavelength dependence (if any) in the RV amplitude. CSHELL observations of the known exoplanet host Gl 86 demonstrate our ability to detect not only hot Jupiters in the near-infrared but also secular trends from more distant companions. Observations of nine very young stars reveal a typical reduction in RV amplitude at the longer wavelengths by a factor of similar to 2-3. While we cannot confirm the presence of planets in this sample, three targets show different periodicities in the two wavelength regions. This suggests different physical mechanisms underlying the optical and the K-band variability.
C1 [Crockett, Christopher J.] USN Observ, Flagstaff, AZ 86001 USA.
   [Prato, L.] Lowell Observ, Flagstaff, AZ 86001 USA.
   [Mahmud, Naved I.; Johns-Krull, Christopher M.; Hartigan, Patrick M.] Rice Univ, Dept Phys & Astron, Houston, TX 77005 USA.
   [Jaffe, Daniel T.] Univ Texas Austin, Dept Astron, Austin, TX 78712 USA.
   [Beichman, Charles A.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
   [Beichman, Charles A.] CALTECH, NASA Exoplanet Sci Inst NExScI, Pasadena, CA 91125 USA.
RP Crockett, CJ (reprint author), USN Observ, 10391 W Naval Observ Rd, Flagstaff, AZ 86001 USA.
EM ccrockett@nofs.navy.mil; naved@rice.edu; lprato@lowell.edu;
   cmj@rice.edu; dtj@astro.as.utexas.edu
FU SIM Young Planets Key Project; NASA [05-SSO05-86, 07-SSO07-86, NCC
   5-538]; NSF; W.M. Keck Foundation
FX The authors thank our anonymous referee for a thorough and enthusiastic
   review. We acknowledge the SIM Young Planets Key Project for research
   support; funding was also provided by NASA Origins grants 05-SSO05-86
   and 07-SSO07-86. This work made use of the SIMBAD database, the NASA
   Astrophysics Data System, and the Two Micron All Sky Survey (2MASS), a
   joint project of the University of Massachusetts and IPAC/Caltech,
   funded by NASA and the NSF. Some of the data presented herein were
   obtained at the W. M. Keck Observatory, which is operated as a
   scientific partnership among the California Institute of Technology, the
   University of California and the National Aeronautics and Space
   Administration. The Observatory was made possible by the generous
   financial support of the W.M. Keck Foundation. We recognize the
   significant cultural role that Mauna Kea plays in the indigenous
   Hawaiian community and are grateful for the opportunity to observe
   there.; Visiting Astronomer at the Infrared Telescope Facility, which is
   operated by the University of Hawaii under Cooperative Agreement No. NCC
   5-538 with the National Aeronautics and Space Administration, Science
   Mission Directorate, Planetary Astronomy Program.
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PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD DEC 20
PY 2012
VL 761
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SC Astronomy & Astrophysics
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UT WOS:000312090300083
ER

PT J
AU Lin, L
   Gogus, E
   Guver, T
   Kouveliotou, C
AF Lin, Lin
   Gogus, Ersin
   Guver, Tolga
   Kouveliotou, Chryssa
TI ON THE X-RAY EMISSION MECHANISMS OF THE PERSISTENT SOURCE AND VERY LOW
   FLUENCE BURSTS OF SGR J0501+4516
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE pulsars: individual (SGR J0501+4516); stars: neutron; X-rays: bursts
ID MAGNETIZED NEUTRON-STARS; SOFT GAMMA REPEATER; VACUUM POLARIZATION;
   OUTBURST; SPECTRA; PULSAR; FIELD; ATMOSPHERES; MONITOR; ORIGINS
AB We present here a detailed spectral study of the X-ray emission of the persistent source and the low-fluence bursts of SGR J0501+4516 observed during a deep XMM-Newton observation near the peak of its 2008 outburst. For the persistent emission, we employ a physically motivated continuum emission model and spectroscopically determine important source properties such as the surface magnetic field strength and the magnetospheric scattering optical depth. We find that the magnetar surface temperature near the peak of its activity is 0.38 keV, corresponding to an emission area of 131 km(2) at a distance of 2 kpc. The surface magnetic field strength determined spectroscopically, B = 2.2x10(14) G, is consistent with the dipole field strength inferred from the source spin and spin-down rate. We fit the stacked spectra of 129 very faint bursts with a modified blackbody model and find a temperature of 1.16 keV, corresponding to an emission area of 93 km(2). We also find evidence for cooling during the burst decay phase.
C1 [Lin, Lin; Gogus, Ersin; Guver, Tolga] Sabanci Univ, Fac Engn & Nat Sci, TR-34956 Istanbul, Turkey.
   [Kouveliotou, Chryssa] NASA, George C Marshall Space Flight Ctr, Sci & Technol Off, Huntsville, AL 35812 USA.
RP Lin, L (reprint author), Sabanci Univ, Fac Engn & Nat Sci, TR-34956 Istanbul, Turkey.
EM linlin@sabanciuniv.edu
RI Guver, Tolga/B-1039-2014
OI Guver, Tolga/0000-0002-3531-9842
FU Turkish Academy of Sciences (TUBA)
FX We thank Yuri Lyubarsky for stimulating discussions. L. L. is funded
   through the Post-Doctoral Research Fellowship of the Turkish Academy of
   Sciences (TUBA).
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PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
EI 1538-4357
J9 ASTROPHYS J
JI Astrophys. J.
PD DEC 20
PY 2012
VL 761
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PG 7
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SC Astronomy & Astrophysics
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UT WOS:000312090300051
ER

PT J
AU Liu, Y
   Schuck, PW
AF Liu, Y.
   Schuck, P. W.
TI MAGNETIC ENERGY AND HELICITY IN TWO EMERGING ACTIVE REGIONS IN THE SUN
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE Sun: activity; Sun: surface magnetism
ID LOCAL CORRELATION TRACKING; SOLAR CORONA; FLUX TUBE; VECTOR
   MAGNETOGRAMS; INDUCTION EQUATION; FORCE-FREE; VELOCITY-FIELD; EVOLUTION;
   EMERGENCE; INJECTION
AB The magnetic energy and relative magnetic helicity in two emerging solar active regions, AR 11072 and AR 11158, are studied. They are computed by integrating over time the energy and relative helicity fluxes across the photosphere. The fluxes consist of two components: one from photospheric tangential flows that shear and braid field lines (shear term), the other from normal flows that advect magnetic flux into the corona (emergence term). For these active regions: (1) relative magnetic helicity in the active-region corona is mainly contributed by the shear term, (2) helicity fluxes from the emergence and the shear terms have the same sign, (3) magnetic energy in the corona (including both potential energy and free energy) is mainly contributed by the emergence term, and (4) energy fluxes from the emergence term and the shear term evolved consistently in phase during the entire flux emergence course. We also examine the apparent tangential velocity derived by tracking field-line footpoints using a simple tracking method. It is found that this velocity is more consistent with tangential plasma velocity than with the flux transport velocity, which agrees with the conclusion by Schuck.
C1 [Liu, Y.] Stanford Univ, WW Hansen Expt Phys Lab, Stanford, CA 94305 USA.
   [Schuck, P. W.] NASA, Space Weather Lab, Heliophys Sci Div, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
RP Liu, Y (reprint author), Stanford Univ, WW Hansen Expt Phys Lab, Stanford, CA 94305 USA.
FU NASA [NAS5-02139]
FX We thank the team members who have made great contributions to this SDO
   mission for their hard work. We also thank the anonymous referees for
   their critical comments which helped improve the paper. This work was
   supported by NASA Contract NAS5-02139 (HMI) to Stanford University. The
   data have been used courtesy of NASA/SDO and the HMI science team.
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PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD DEC 20
PY 2012
VL 761
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AR 105
DI 10.1088/0004-637X/761/2/105
PG 15
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SC Astronomy & Astrophysics
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UT WOS:000312090300024
ER

PT J
AU Mancone, CL
   Baker, T
   Gonzalez, AH
   Ashby, MLN
   Stanford, SA
   Brodwin, M
   Eisenhardt, PRM
   Snyder, G
   Stern, D
   Wright, EL
AF Mancone, Conor L.
   Baker, Troy
   Gonzalez, Anthony H.
   Ashby, Matthew L. N.
   Stanford, Spencer A.
   Brodwin, Mark
   Eisenhardt, Peter R. M.
   Snyder, Greg
   Stern, Daniel
   Wright, Edward L.
TI THE FAINT END OF THE CLUSTER-GALAXY LUMINOSITY FUNCTION AT HIGH REDSHIFT
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE galaxies: clusters: general; galaxies: evolution; galaxies: formation;
   galaxies: luminosity function, mass
ID SIMILAR-TO 1; STELLAR POPULATION SYNTHESIS; STAR-FORMATION HISTORIES;
   HUBBLE-SPACE-TELESCOPE; INITIAL MASS FUNCTION; IRAC SHALLOW SURVEY; RED
   SEQUENCE; COMA CLUSTER; INTRACLUSTER STARS; DENSITY RELATION
AB We measure the faint-end slope of the galaxy luminosity function (LF) for cluster galaxies at 1 < z < 1.5 using Spitzer IRAC data. We investigate whether this slope, alpha, differs from that of the field LF at these redshifts, and with the cluster LF at low redshifts. The latter is of particular interest as low-luminosity galaxies are expected to undergo significant evolution. We use seven high-redshift spectroscopically confirmed galaxy clusters drawn from the IRAC Shallow Cluster Survey to measure the cluster-galaxy LF down to depths of M*+3 (3.6 mu m) andM*+2.5 (4.5 mu m). The summed LF at our median cluster redshift (z = 1.35) is well fit by a Schechter distribution with alpha(3.6 mu m) = -0.97 +/- 0.14 and alpha(4.5 mu m) = -0.91 +/- 0.28, consistent with a flat faint-end slope and is in agreement with measurements of the field LF in similar bands at these redshifts. A comparison to alpha in low-redshift clusters finds no statistically significant evidence of evolution. Combined with past studies which show that M* is passively evolving out to z similar to 1.3, this means that the shape of the cluster LF is largely in place by z similar to 1.3. This suggests that the processes that govern the buildup of the mass of low-mass cluster galaxies have no net effect on the faint-end slope of the cluster LF at z less than or similar to 1.3.
C1 [Mancone, Conor L.; Baker, Troy; Gonzalez, Anthony H.] Univ Florida, Dept Astron, Gainesville, FL 32611 USA.
   [Ashby, Matthew L. N.; Snyder, Greg] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
   [Stanford, Spencer A.] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA.
   [Stanford, Spencer A.] Lawrence Livermore Natl Lab, Inst Geophys & Planetary Phys, Livermore, CA 94550 USA.
   [Brodwin, Mark] Univ Missouri, Dept Phys & Astron, Kansas City, MO 64110 USA.
   [Eisenhardt, Peter R. M.; Stern, Daniel] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
   [Wright, Edward L.] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA.
RP Mancone, CL (reprint author), Univ Florida, Dept Astron, Gainesville, FL 32611 USA.
EM cmancone@astro.ufl.edu
FU NASA [NAS 5-26555, HST-GO-10496]; National Science Foundation
   [AST-00708490];  [P78];  [P30950];  [GO-10496]
FX This work is based on observations made with the Spitzer Space
   Telescope, which is operated by the Jet Propulsion Laboratory,
   California Institute of Technology under a contract with NASA. The
   observations are associated with programs P78 and P30950. This work is
   based on observations made with the NASA/ESA Hubble Space Telescope,
   obtained from the Data Archive at the Space Telescope Science Institute,
   which is operated by the Association of Universities for Research in
   Astronomy, Inc., under NASA contract NAS 5-26555. The observations are
   associated with program GO-10496. C. L. M. and A. H. G. acknowledge
   support for this work from the National Science Foundation under grant
   AST-00708490. A. H. G., M. B., and S. A. S. also acknowledge support
   from NASA through grant HST-GO-10496.
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PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD DEC 20
PY 2012
VL 761
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PG 8
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SC Astronomy & Astrophysics
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UT WOS:000312090300060
ER

PT J
AU Schlichting, HE
   Ofek, EO
   Sari, R
   Nelan, EP
   Gal-Yam, A
   Wenz, M
   Muirhead, P
   Javanfar, N
   Livio, M
AF Schlichting, Hilke E.
   Ofek, Eran O.
   Sari, Re'em
   Nelan, Edmund P.
   Gal-Yam, Avishay
   Wenz, Michael
   Muirhead, Philip
   Javanfar, Nikta
   Livio, Mario
TI MEASURING THE ABUNDANCE OF SUB-KILOMETER-SIZED KUIPER BELT OBJECTS USING
   STELLAR OCCULTATIONS
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE comets: general; Kuiper Belt: general; methods: observational;
   occultations; planets and satellites: formation; techniques: photometric
ID TRANS-NEPTUNIAN OBJECTS; FINE GUIDANCE SENSOR; OUTER SOLAR-SYSTEM;
   MILLISECOND DIPS; PLANET FORMATION; SCO X-1; SEARCH; BODIES;
   DISTRIBUTIONS; POPULATION
AB We present here the analysis of about 19,500 new star hours of low ecliptic latitude observations (vertical bar b vertical bar <= 20 degrees) obtained by the Hubble Space Telescope's Fine Guidance Sensors over a time span of more than nine years, which is in addition to the similar to 12,000 star hours previously analyzed by Schlichting et al. Our search for stellar occultations by small Kuiper Belt Objects (KBOs) yielded one new candidate event corresponding to a body with a 530 +/- 70 m radius at a distance of about 40 AU. Using bootstrap simulations, we estimate a probability of approximate to 5% that this event is due to random statistical fluctuations within the new data set. Combining this new event with the single KBO occultation reported by Schlichting et al. we arrive at the following results: (1) the ecliptic latitudes of 6 degrees.6 and 14 degrees.4 of the two events are consistent with the observed inclination distribution of larger, 100-km-sized KBOs. (2) Assuming that small, sub-kilometer-sized KBOs have the same ecliptic latitude distribution as their larger counterparts, we find an ecliptic surface density of KBOs with radii larger than 250 m of N(r > 250 m) = 1.1(-0.7)(+1.5) x 10(7) deg(-2); if sub-kilometer-sized KBOs have instead a uniform ecliptic latitude distribution for -20 degrees < b < 20 degrees then N(r > 250 m) = 4.4(-2.8)(+5.8) x 10(6) deg(-2). This is the best measurement of the surface density of sub-kilometer-sized KBOs to date. (3) Assuming the KBO size distribution can be well described by a single power law given by N(>r) proportional to r(1-q), where N(>r) is the number of KBOs with radii greater than r, and q is the power-law index, we find q = 3.8 +/- 0.2 and q = 3.6 +/- 0.2 for a KBO ecliptic latitude distribution that follows the observed distribution for larger, 100-km-sized KBOs and a uniform KBO ecliptic latitude distribution for -20 degrees < b < 20 degrees, respectively. (4) Regardless of the exact power law, our results suggest that small KBOs are numerous enough to satisfy the required supply rate for the Jupiter family comets. (5) We can rule out a single power law below the break with q > 4.0 at 2 sigma, confirming a strong deficit of sub-kilometer-sized KBOs compared to a population extrapolated from objects with r > 45 km. This suggests that small KBOs are undergoing collisional erosion and that the Kuiper Belt is a true analog to the dust producing debris disks observed around other stars.
C1 [Schlichting, Hilke E.] Univ Calif Los Angeles, Dept Earth & Space Sci, Los Angeles, CA 90095 USA.
   [Schlichting, Hilke E.; Muirhead, Philip] CALTECH, Dept Astron, Pasadena, CA 91125 USA.
   [Ofek, Eran O.; Gal-Yam, Avishay] Weizmann Inst Sci, Fac Phys, IL-76100 Rehovot, Israel.
   [Sari, Re'em] Hebrew Univ Jerusalem, Racah Inst Phys, IL-91904 Jerusalem, Israel.
   [Nelan, Edmund P.; Livio, Mario] Space Telescope Sci Inst, Baltimore, MD 21218 USA.
   [Wenz, Michael] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
   [Javanfar, Nikta] Queens Univ, Dept Phys Phys Engn & Astron, Kingston, ON K7L 3N6, Canada.
RP Schlichting, HE (reprint author), Univ Calif Los Angeles, Dept Earth & Space Sci, 595 Charles E Young Dr E, Los Angeles, CA 90095 USA.
EM hilke@ucla.edu
RI Muirhead, Philip/H-2273-2014
OI Muirhead, Philip/0000-0002-0638-8822
FU NASA [HST-HF-51281.01-A, NAS 5-26555]; Space Telescope Science
   Institute; ERC; Packard Fellowship; HST [HST-AR-12154.08-A]; Israeli
   Ministry of Science; Helen Kimmel Center for Planetary Science
FX We thank Dr. Evan Kirby for analyzing and fitting the guide star
   spectrum. For H. S. support for this work was provided by NASA through
   Hubble Fellowship Grant No. HST-HF-51281.01-A awarded by the Space
   Telescope Science Institute, which is operated by the Association of
   Universities for Research in Astronomy, Inc., for NASA, under contact
   NAS 5-26555. R. S. acknowledges support by an ERC grant, a Packard
   Fellowship, and HST Grant No. HST-AR-12154.08-A. E.O.O. is incumbent of
   the Arye Dissentshik career development chair and is grateful for
   support by a grant from the Israeli Ministry of Science and for support
   from the The Helen Kimmel Center for Planetary Science.
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PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD DEC 20
PY 2012
VL 761
IS 2
AR 150
DI 10.1088/0004-637X/761/2/150
PG 10
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 050YH
UT WOS:000312090300069
ER

PT J
AU Semler, DR
   Suhada, R
   Aird, KA
   Ashby, MLN
   Bautz, M
   Bayliss, M
   Bazin, G
   Bocquet, S
   Benson, BA
   Bleem, LE
   Brodwin, M
   Carlstrom, JE
   Chang, CL
   Cho, HM
   Clocchiatti, A
   Crawford, TM
   Crites, AT
   de Haan, T
   Desai, S
   Dobbs, MA
   Dudley, JP
   Foley, RJ
   George, EM
   Gladders, MD
   Gonzalez, AH
   Halverson, NW
   Harrington, NL
   High, FW
   Holder, GP
   Holzapfel, WL
   Hoover, S
   Hrubes, JD
   Jones, C
   Joy, M
   Keisler, R
   Knox, L
   Lee, AT
   Leitch, EM
   Liu, J
   Lueker, M
   Luong-Van, D
   Mantz, A
   Marrone, DP
   McDonald, M
   McMahon, JJ
   Mehl, J
   Meyer, SS
   Mocanu, L
   Mohr, JJ
   Montroy, TE
   Murray, SS
   Natoli, T
   Padin, S
   Plagge, T
   Pryke, C
   Reichardt, CL
   Rest, A
   Ruel, J
   Ruhl, JE
   Saliwanchik, BR
   Saro, A
   Sayre, JT
   Schaffer, KK
   Shaw, L
   Shirokoff, E
   Song, J
   Spieler, HG
   Stalder, B
   Staniszewski, Z
   Stark, AA
   Story, K
   Stubbs, CW
   van Engelen, A
   Vanderlinde, K
   Vieira, JD
   Vikhlinin, A
   Williamson, R
   Zahn, O
   Zenteno, A
AF Semler, D. R.
   Suhada, R.
   Aird, K. A.
   Ashby, M. L. N.
   Bautz, M.
   Bayliss, M.
   Bazin, G.
   Bocquet, S.
   Benson, B. A.
   Bleem, L. E.
   Brodwin, M.
   Carlstrom, J. E.
   Chang, C. L.
   Cho, H. M.
   Clocchiatti, A.
   Crawford, T. M.
   Crites, A. T.
   de Haan, T.
   Desai, S.
   Dobbs, M. A.
   Dudley, J. P.
   Foley, R. J.
   George, E. M.
   Gladders, M. D.
   Gonzalez, A. H.
   Halverson, N. W.
   Harrington, N. L.
   High, F. W.
   Holder, G. P.
   Holzapfel, W. L.
   Hoover, S.
   Hrubes, J. D.
   Jones, C.
   Joy, M.
   Keisler, R.
   Knox, L.
   Lee, A. T.
   Leitch, E. M.
   Liu, J.
   Lueker, M.
   Luong-Van, D.
   Mantz, A.
   Marrone, D. P.
   McDonald, M.
   McMahon, J. J.
   Mehl, J.
   Meyer, S. S.
   Mocanu, L.
   Mohr, J. J.
   Montroy, T. E.
   Murray, S. S.
   Natoli, T.
   Padin, S.
   Plagge, T.
   Pryke, C.
   Reichardt, C. L.
   Rest, A.
   Ruel, J.
   Ruhl, J. E.
   Saliwanchik, B. R.
   Saro, A.
   Sayre, J. T.
   Schaffer, K. K.
   Shaw, L.
   Shirokoff, E.
   Song, J.
   Spieler, H. G.
   Stalder, B.
   Staniszewski, Z.
   Stark, A. A.
   Story, K.
   Stubbs, C. W.
   van Engelen, A.
   Vanderlinde, K.
   Vieira, J. D.
   Vikhlinin, A.
   Williamson, R.
   Zahn, O.
   Zenteno, A.
TI HIGH-REDSHIFT COOL-CORE GALAXY CLUSTERS DETECTED VIA THE
   SUNYAEV-ZEL'DOVICH EFFECT IN THE SOUTH POLE TELESCOPE SURVEY
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE galaxies: clusters: general; X-rays: galaxies: clusters
ID XMM-NEWTON OBSERVATIONS; X-RAY; INTRACLUSTER MEDIUM; BRIGHTEST CLUSTER;
   LUMINOSITY FUNCTION; EVOLUTION; RADIO; CATALOG; SAMPLE; FLOWS
AB We report the first investigation of cool-core properties of galaxy clusters selected via their Sunyaev-Zel'dovich (SZ) effect. We use 13 galaxy clusters uniformly selected from 178 deg(2) observed with the South Pole Telescope (SPT) and followed up by the Chandra X-ray Observatory. They form an approximately mass-limited sample (>3 x 10(14) M-circle dot h(70)(-1)) spanning redshifts 0.3 < z < 1.1. Using previously published X-ray-selected cluster samples, we compare two proxies of cool-core strength: surface brightness concentration (c(SB)) and cuspiness (alpha). We find that c(SB) is better constrained. We measure c(SB) for the SPT sample and find several new z > 0.5 cool-core clusters, including two strong cool cores. This rules out the hypothesis that there are no z > 0.5 clusters that qualify as strong cool cores at the 5.4 sigma level. The fraction of strong cool-core clusters in the SPT sample in this redshift regime is between 7% and 56% (95% confidence). Although the SPT selection function is significantly different from the X-ray samples, the high-z c(SB) distribution for the SPT sample is statistically consistent with that of X-ray-selected samples at both low and high redshifts. The cool-core strength is inversely correlated with the offset between the brightest cluster galaxy and the X-ray centroid, providing evidence that the dynamical state affects the cool-core strength of the cluster. Larger SZ-selected samples will be crucial in understanding the evolution of cluster cool cores over cosmic time.
C1 [Semler, D. R.; Suhada, R.; Bazin, G.; Bocquet, S.; Desai, S.; Liu, J.; Mohr, J. J.; Saro, A.; Zenteno, A.] Univ Munich, Dept Phys, D-81679 Munich, Germany.
   [Ashby, M. L. N.; Bayliss, M.; Foley, R. J.; Jones, C.; Murray, S. S.; Stalder, B.; Stark, A. A.; Stubbs, C. W.; Vikhlinin, A.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
   [Bautz, M.; McDonald, M.] MIT, MIT Kavli Inst Astrophys & Space Res, Cambridge, MA 02139 USA.
   [Bayliss, M.; Ruel, J.; Stubbs, C. W.] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA.
   [Bazin, G.; Desai, S.; Liu, J.; Mohr, J. J.; Zenteno, A.] Excellence Cluster Univ, D-85748 Garching, Germany.
   [Benson, B. A.; Bleem, L. E.; Carlstrom, J. E.; Chang, C. L.; Crawford, T. M.; Crites, A. T.; Gladders, M. D.; High, F. W.; Hoover, S.; Keisler, R.; Leitch, E. M.; Mantz, A.; McMahon, J. J.; Mehl, J.; Meyer, S. S.; Mocanu, L.; Natoli, T.; Padin, S.; Plagge, T.; Schaffer, K. K.; Story, K.; Vieira, J. D.; Williamson, R.] Univ Chicago, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA.
   [Bleem, L. E.; Carlstrom, J. E.; Keisler, R.; Meyer, S. S.; Natoli, T.; Story, K.; Vieira, J. D.] Univ Chicago, Dept Phys, Chicago, IL 60637 USA.
   [Brodwin, M.] Univ Missouri, Dept Phys & Astron, Kansas City, MO 64110 USA.
   [Benson, B. A.; Carlstrom, J. E.; Chang, C. L.; Hoover, S.; McMahon, J. J.; Meyer, S. S.; Schaffer, K. K.] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA.
   [Carlstrom, J. E.; Crawford, T. M.; Crites, A. T.; Gladders, M. D.; High, F. W.; Leitch, E. M.; Mantz, A.; Mehl, J.; Meyer, S. S.; Mocanu, L.; Padin, S.; Plagge, T.; Williamson, R.] Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA.
   [Carlstrom, J. E.; Chang, C. L.] Argonne Natl Lab, Argonne, IL 60439 USA.
   [Cho, H. M.] NIST, Quantum Devices Grp, Boulder, CO 80305 USA.
   [Clocchiatti, A.] Dept Astron & Astrofis, Santiago 22, Chile.
   [de Haan, T.; Dobbs, M. A.; Dudley, J. P.; Holder, G. P.; Shaw, L.; van Engelen, A.; Vanderlinde, K.] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada.
   [George, E. M.; Harrington, N. L.; Holzapfel, W. L.; Lee, A. T.; Lueker, M.; Reichardt, C. L.; Shirokoff, E.; Zahn, O.] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
   [Gonzalez, A. H.] Univ Florida, Dept Astron, Gainesville, FL 32611 USA.
   [Halverson, N. W.] Univ Colorado, Dept Astrophys & Planetary Sci, Boulder, CO 80309 USA.
   [Halverson, N. W.] Univ Colorado, Dept Phys, Boulder, CO 80309 USA.
   [Joy, M.] NASA, George C Marshall Space Flight Ctr, Dept Space Sci, Huntsville, AL 35812 USA.
   [Knox, L.] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA.
   [Lee, A. T.; Spieler, H. G.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Phys, Berkeley, CA 94720 USA.
   [Lueker, M.; Padin, S.; Shirokoff, E.; Vieira, J. D.] CALTECH, Pasadena, CA 91125 USA.
   [Marrone, D. P.] Univ Arizona, Steward Observ, Tucson, AZ 85721 USA.
   [McMahon, J. J.; Song, J.] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA.
   [Mohr, J. J.] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany.
   [Montroy, T. E.; Ruhl, J. E.; Saliwanchik, B. R.; Sayre, J. T.; Staniszewski, Z.] Case Western Reserve Univ, Ctr Educ & Res Cosmol & Astrophys, Dept Phys, Cleveland, OH 44106 USA.
   [Pryke, C.] Univ Minnesota, Dept Phys, Minneapolis, MN 55455 USA.
   [Rest, A.] Space Telescope Sci Inst, Baltimore, MD 21218 USA.
   [Schaffer, K. K.] Sch Art Inst Chicago, Liberal Arts Dept, Chicago, IL 60603 USA.
   [Shaw, L.] Yale Univ, Dept Phys, New Haven, CT 06520 USA.
   [Zahn, O.] Univ Calif Berkeley, Dept Phys, Berkeley Ctr Cosmol Phys, Berkeley, CA 94720 USA.
   [Zahn, O.] Lawrence Berkeley Natl Labs, Berkeley, CA 94720 USA.
RP Semler, DR (reprint author), Univ Munich, Dept Phys, Scheinerstr 1, D-81679 Munich, Germany.
RI Williamson, Ross/H-1734-2015; Holzapfel, William/I-4836-2015; Stubbs,
   Christopher/C-2829-2012
OI Marrone, Daniel/0000-0002-2367-1080; Aird, Kenneth/0000-0003-1441-9518;
   Williamson, Ross/0000-0002-6945-2975; Reichardt,
   Christian/0000-0003-2226-9169; Stark, Antony/0000-0002-2718-9996;
   Stubbs, Christopher/0000-0003-0347-1724
FU National Science Foundation [ANT-0638937]; The Cluster of Excellence
   "Origin and Structure of the Universe"; Excellence Initiative of the
   Federal Government of Germany, EXC [153]; Chandra X-ray Observatory
   Center [GO2-13006A]; NSF Physics Frontier Center [PHY-0114422]; Kavli
   Foundation; Gordon and Betty Moore Foundation; NSF [AST-1009012,
   AST-1009649, MRI-0723073]; National Sciences and Engineering Research
   Council of Canada; Canada Research Chairs program; Canadian Institute
   for Advanced Research; NASA [NAS 8-03060, HST-HF-51308.01]; National
   Aeronautics and Space Administration [GO0-1114, NAS8-03060]; Clay
   Fellowship; KICP Fellowship; Pennsylvania State University
   [2834-MIT-SAO-4018]; Alfred P. Sloan Research Fellowship; Smithsonian
   Institution; Brinson Foundation
FX The South Pole Telescope program is supported by the National Science
   Foundation through grant ANT-0638937. The Munich group is supported by
   The Cluster of Excellence "Origin and Structure of the Universe," funded
   by the Excellence Initiative of the Federal Government of Germany, EXC
   project No. 153. Galaxy cluster research at the University of Chicago is
   partially supported by Chandra award No. GO2-13006A issued by the
   Chandra X-ray Observatory Center. Partial support is also provided by
   the NSF Physics Frontier Center grant PHY-0114422 to the Kavli Institute
   of Cosmological Physics at the University of Chicago, the Kavli
   Foundation, and the Gordon and Betty Moore Foundation. Galaxy cluster
   research at Harvard is supported by NSF grant AST-1009012. Galaxy
   cluster research at SAO is supported in part by NSF grants AST-1009649
   and MRI-0723073. The McGill group acknowledges funding from the National
   Sciences and Engineering Research Council of Canada, Canada Research
   Chairs program, and the Canadian Institute for Advanced Research. X-ray
   research at the CfA is supported through NASA contract NAS 8-03060.
   Support for X-ray analysis is provided by the National Aeronautics and
   Space Administration through Chandra award No. GO0-1114 issued by the
   Chandra X-ray Observatory Center, which is operated by the Smithsonian
   Astrophysical Observatory for and on behalf of the National Aeronautics
   Space Administration under contract NAS8-03060. R.J.F. is supported by a
   Clay Fellowship. B. A. B is supported by a KICP Fellowship. M. Bautz and
   M. M acknowledge support from contract 2834-MIT-SAO-4018 from the
   Pennsylvania State University to the Massachusetts Institute of
   Technology. M. M acknowledges support from NASA Hubble fellowship grant
   HST-HF-51308.01. M. D. acknowledges support from an Alfred P. Sloan
   Research Fellowship, C.J. acknowledges support from the Smithsonian
   Institution, and B. S. acknowledges support from the Brinson Foundation.
   The authors thank Marcella Brusa for her helpful discussion.
NR 55
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U1 1
U2 8
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD DEC 20
PY 2012
VL 761
IS 2
AR 183
DI 10.1088/0004-637X/761/2/183
PG 9
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 050YH
UT WOS:000312090300102
ER

PT J
AU Stecker, FW
   Malkan, MA
   Scully, ST
AF Stecker, Floyd W.
   Malkan, Matthew A.
   Scully, Sean T.
TI A DETERMINATION OF THE INTERGALACTIC REDSHIFT-DEPENDENT
   ULTRAVIOLET-OPTICAL-NIR PHOTON DENSITY USING DEEP GALAXY SURVEY DATA AND
   THE GAMMA-RAY OPACITY OF THE UNIVERSE
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE diffuse radiation; galaxies: general; galaxies: luminosity function,
   mass function; ultraviolet: galaxies
ID EXTRAGALACTIC BACKGROUND LIGHT; LYMAN-BREAK GALAXIES; STAR-FORMATION
   RATE; INFRARED LUMINOSITY FUNCTIONS; HUBBLE-SPACE-TELESCOPE; FAINT-END
   SLOPE; FORMING GALAXIES; WFC3/IR OBSERVATIONS; FORMATION HISTORY; DUST
   ATTENUATION
AB We calculate the intensity and photon spectrum of the intergalactic background light (IBL) as a function of redshift using an approach based on observational data obtained in many different wavelength bands from local to deep galaxy surveys. This allows us to obtain an empirical determination of the IBL and to quantify its observationally based uncertainties. Using our results on the IBL, we then place 68% confidence upper and lower limits on the opacity of the universe to gamma-rays, free of the theoretical assumptions that were needed for past calculations. We compare our results with measurements of the extragalactic background light and upper limits obtained from observations made by the Fermi Gamma-ray Space Telescope.
C1 [Stecker, Floyd W.] NASA, Goddard Space Flight Ctr, Astrophys Sci Div, Greenbelt, MD 20771 USA.
   [Stecker, Floyd W.; Malkan, Matthew A.] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA.
   [Scully, Sean T.] James Madison Univ, Dept Phys, Harrisonburg, VA 22807 USA.
RP Stecker, FW (reprint author), NASA, Goddard Space Flight Ctr, Astrophys Sci Div, Greenbelt, MD 20771 USA.
EM Floyd.W.Stecker@nasa.gov; malkan@astro.ucla.edu; scullyst@jmu.edu
FU NASA
FX We thank Luis Reyes and Anita Reimer for supplying us with the Fermi
   results shown in Figure 5. We thank Richard Henry for a helpful
   discussion of the UV background data. We also thank Tonia Venters for
   helpful discussions. This research was partially supported by a NASA
   Astrophysics Theory Grant and a NASA Fermi Guest Investigator Grant.
NR 75
TC 21
Z9 21
U1 0
U2 6
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD DEC 20
PY 2012
VL 761
IS 2
AR 128
DI 10.1088/0004-637X/761/2/128
PG 9
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 050YH
UT WOS:000312090300047
ER

PT J
AU Hadjadj, A
   Yee, HC
   Sjogreen, B
AF Hadjadj, Abdellah
   Yee, Helen C.
   Sjoegreen, Bjorn
TI LES of temporally evolving mixing layers by an eighth-order filter
   scheme
SO INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS
LA English
DT Article
DE DNS; LES; homogeneous turbulence; mixing layer; SWBLI
ID LARGE-EDDY SIMULATION; TURBULENT SHEAR-LAYER; NUMERICAL DISSIPATION;
   GROWTH-RATE; FLOWS; COMPRESSIBILITY; MODEL; BEHAVIOR
AB An eighth-order filter method for a wide range of compressible flow speeds (H. C. Yee and B. Sjogreen, Proceedings of ICOSAHOM09, June 2226, 2009, Trondheim, Norway) is employed for large eddy simulations (LES) of temporally evolving mixing layers (TML) for different convective Mach numbers (Mc) and Reynolds numbers. The high-order filter method is designed for accurate and efficient simulations of shock-free compressible turbulence, turbulence with shocklets, and turbulence with strong shocks with minimum tuning of scheme parameters. The value of the Mc considered is for the TML range from the quasi-incompressible regime to the highly compressible supersonic regime. The three main characteristics of compressible TML (the self-similarity property, compressibility effects, and the presence of large-scale structures with shocklets for high Mc) are considered for the LES study. The LES results that used the same scheme parameters for all studied cases agree well with experimental results and published direct numerical simulations (DNS). Published 2012. This article is a US Government work and is in the public domain in the USA.
C1 [Yee, Helen C.] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
   [Hadjadj, Abdellah] INSA Rouen, CNRS, CORIA, UMR 6614, F-76800 St Etienne, France.
   [Sjoegreen, Bjorn] Lawrence Livermore Natl Lab, CASC, Livermore, CA 94551 USA.
   [Hadjadj, Abdellah] Stanford Univ, Ctr Turbulence Res, Stanford, CA 94305 USA.
RP Yee, HC (reprint author), NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
EM yee@nas.nasa.gov
FU DOE/SciDAC SAP [DE-AI02-06ER25796]; U.S. Department of Energy by
   Lawrence Livermore National Laboratory [DE-AC52-07NA27344]
FX The authors wish to express their gratitude to T. Sandstrom and C. Henze
   of the Visualization Group, and A. Lazanoff and J. Chang of the
   Scientific Consultant Group, Code TN, NASA Ames for their help. Special
   thanks to M. Rogers and A. Wray for their valuable discussion during the
   course of this research. The support of the DOE/SciDAC SAP grant
   DE-AI02-06ER25796 is acknowledged. Part of the work by the second author
   was performed under the NASA Fundamental Aeronautics Hypersonic Program.
   Work by the third author was performed under the auspices of the U.S.
   Department of Energy by Lawrence Livermore National Laboratory under
   Contract DE-AC52-07NA27344.
NR 68
TC 8
Z9 10
U1 0
U2 16
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0271-2091
EI 1097-0363
J9 INT J NUMER METH FL
JI Int. J. Numer. Methods Fluids
PD DEC 20
PY 2012
VL 70
IS 11
BP 1405
EP 1427
DI 10.1002/fld.2753
PG 23
WC Computer Science, Interdisciplinary Applications; Mathematics,
   Interdisciplinary Applications; Mechanics; Physics, Fluids & Plasmas
SC Computer Science; Mathematics; Mechanics; Physics
GA 029EV
UT WOS:000310478500005
ER

PT J
AU Brakenridge, GR
   Cohen, S
   Kettner, AJ
   De Groeve, T
   Nghiem, SV
   Syvitski, JPM
   Fekete, BM
AF Brakenridge, G. Robert
   Cohen, Sagy
   Kettner, Albert J.
   De Groeve, Tom
   Nghiem, Son V.
   Syvitski, James P. M.
   Fekete, Balazs M.
TI Calibration of satellite measurements of river discharge using a global
   hydrology model
SO JOURNAL OF HYDROLOGY
LA English
DT Article
DE Rivers; Water discharge; Runoff; Remote sensing; Hydrological model;
   Water balance model
ID UNGAUGED BASINS PUB; SOIL-MOISTURE; PRECIPITATION; UNCERTAINTY;
   REANALYSIS; PREDICTION; BARE
AB Measurements of river discharge and watershed runoff are essential to water resources management, efficient hydropower generation, accurate flood prediction and control, and improved understanding of the global water cycle. Previous work demonstrates that orbital remote sensing can measure river discharge variation in a manner closely analogous to its measurement at ground stations, and using reach flow surface area instead of stage as the discharge estimator. For international measurements, hydrological modeling can, in principle, be used to provide the needed calibration of sensor data to discharge. The present study tests this approach and investigates the accuracy of the results. We analyze six sites within the US where gauging station, satellite measurements, and WBM model results are all available. Knowledge is thereby gained concerning how accurately satellite sensors can measure discharge, if the signal is calibrated only from global modeling results without any ground-based information. The calibration (rating) equations obtained for the remote sensing signal are similar, whether based on gauging station or on model information: r(2) correlation coefficients for least squares fits at one example site (#524; White River, Indiana) are both .66 (n = 144, comparing monthly daily maxima, minima, and mean, 20032006). Space-based 4-day mean discharge values for this site when using the model calibration are accurate to within +/- 67% on the average (n = 1824; largest percent errors occur at low discharges), and annual total runoff is accurate to 9%, 2003-2008. Comparison of gauging station versus modeled discharge commonly indicates a small positive model bias; the observed errors of satellite-observed annual runoff are also positive and could be improved by bias removal from the rating curves. Also, analysis of a large flood event, along the Indus River in 2010, shows that the model does not capture flood wave attenuation by overbank flow, and thus predicts faster flood wave celerity and higher peak discharge than was measured by the remote sensing. The incorporation of overbank processes would improve discharge estimation via modeling, and also facilitate more accurate satellite-based measurement of peak discharge. The analysis shows that existing and planned microwave sensors can usefully characterize global river discharge dynamics, and that water balance model-based rating curves provide acceptable calibration of remote sensing signal to discharge. (C) 2012 Elsevier B.V. All rights reserved.
C1 [Brakenridge, G. Robert; Cohen, Sagy; Kettner, Albert J.; Syvitski, James P. M.] Univ Colorado, Inst Arctic & Alpine Res, Boulder, CO 80309 USA.
   [Cohen, Sagy] Univ Alabama, Dept Geog, Tuscaloosa, AL 35487 USA.
   [De Groeve, Tom] Commiss European Communities, Joint Res Ctr, I-21020 Ispra, Italy.
   [Nghiem, Son V.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
   [Fekete, Balazs M.] CUNY City Coll, CUNY Environm CrossRd Initiat, NOAA CREST Ctr, New York, NY 10031 USA.
RP Brakenridge, GR (reprint author), Univ Colorado, Inst Arctic & Alpine Res, Boulder, CO 80309 USA.
EM Robert.Brakenridge@Colorado.edu
RI Syvitski, James/L-2008-2013; 
OI Cohen, Sagy/0000-0002-3354-2864
FU National Aeronautics and Space Administration; U.S. National Science
   Foundation; European Commission; NASA
FX Part of the research (by Nghiem) was carried out at the Jet Propulsion
   Laboratory, California Institute of Technology, under a contract with
   the National Aeronautics and Space Administration. The other authors
   thank as well the U.S. National Science Foundation, the European
   Commission, and NASA for support, and the University of Colorado,
   Community Surface Dynamics Modeling System (CSDMS) for computing time on
   high-performance computing clusters.
NR 51
TC 23
Z9 23
U1 2
U2 52
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0022-1694
EI 1879-2707
J9 J HYDROL
JI J. Hydrol.
PD DEC 19
PY 2012
VL 475
BP 123
EP 136
DI 10.1016/j.jhydrol.2012.09.035
PG 14
WC Engineering, Civil; Geosciences, Multidisciplinary; Water Resources
SC Engineering; Geology; Water Resources
GA 075DO
UT WOS:000313864200011
ER

PT J
AU Karydis, VA
   Capps, SL
   Moore, RH
   Russell, AG
   Henze, DK
   Nenes, A
AF Karydis, V. A.
   Capps, S. L.
   Moore, R. H.
   Russell, A. G.
   Henze, D. K.
   Nenes, A.
TI Using a global aerosol model adjoint to unravel the footprint of
   spatially-distributed emissions on cloud droplet number and cloud albedo
SO GEOPHYSICAL RESEARCH LETTERS
LA English
DT Article
ID EASTERN UNITED-STATES; US ANTHROPOGENIC AEROSOLS; FINE PARTICULATE
   MATTER; GEOS-CHEM; PM2.5; CCN
AB The adjoints of the GEOS-Chem Chemical Transport Model and a comprehensive cloud droplet parameterization are coupled to study the sensitivity of cloud droplet number concentration (N-d) over US regions and Central Europe to global emissions of anthropogenic fine mode aerosol precursors. Simulations reveal that the N-d over the midwestern and southeastern US is mostly sensitive to SO2 emissions during August, and to NH3 emissions during February. Over the western US, N-d is mostly sensitivity to SO2 and primary organic aerosol emissions. In Central Europe, N-d is most sensitive to NH3 and NOx emissions. As expected, local emissions strongly affect N-d; long-range transport, however, is also important for the western US and Europe. Emissions changes projected for the year 2050 are estimated to have the largest impacts on cloud albedo and N-d over Central Europe during August (42% and 82% change, respectively) and western US during February (12% and 36.5% change, respectively). Citation: Karydis, V. A., S. L. Capps, R. H. Moore, A. G. Russell, D. K. Henze, and A. Nenes (2012), Using a global aerosol model adjoint to unravel the footprint of spatially-distributed emissions on cloud droplet number and cloud albedo, Geophys. Res. Lett., 39, L24804, doi: 10.1029/2012GL053346.
C1 [Karydis, V. A.; Capps, S. L.; Russell, A. G.; Nenes, A.] Georgia Inst Technol, Atlanta, GA 30332 USA.
   [Moore, R. H.] NASA, Langley Res Ctr, Hampton, VA 23665 USA.
   [Henze, D. K.] Univ Colorado, Dept Mech Engn, Boulder, CO 80309 USA.
RP Nenes, A (reprint author), Georgia Inst Technol, 311 Ferst Dr, Atlanta, GA 30332 USA.
EM athanasios.nenes@gatech.edu
RI Moore, Richard/E-9653-2010; Chem, GEOS/C-5595-2014; Capps,
   Shannon/E-5602-2017
OI Capps, Shannon/0000-0002-6872-6604
FU NASA-ACMAP; NOAA; NSF GRF; NASA ESSF; NASA [NNX10AR06G]
FX We acknowledge support from NASA-ACMAP and NOAA. SLC gratefully
   acknowledges the NSF GRF and NASA ESSF. DKH acknowledges support from a
   NASA New Investigator grant (NNX10AR06G). We also thank two anonymous
   reviewers for comments that improved the manuscript.
NR 25
TC 2
Z9 2
U1 1
U2 25
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0094-8276
J9 GEOPHYS RES LETT
JI Geophys. Res. Lett.
PD DEC 19
PY 2012
VL 39
AR L24804
DI 10.1029/2012GL053346
PG 5
WC Geosciences, Multidisciplinary
SC Geology
GA 061UL
UT WOS:000312873800001
ER

PT J
AU Kang, JS
   Kalnay, E
   Miyoshi, T
   Liu, JJ
   Fung, I
AF Kang, Ji-Sun
   Kalnay, Eugenia
   Miyoshi, Takemasa
   Liu, Junjie
   Fung, Inez
TI Estimation of surface carbon fluxes with an advanced data assimilation
   methodology
SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
LA English
DT Article
ID ENSEMBLE KALMAN FILTER; ADAPTIVE COVARIANCE INFLATION; ATMOSPHERIC CO2;
   MODEL ERROR; SINKS; INVERSION; DIOXIDE; SYSTEM; PARAMETERS; FORECAST
AB We perform every 6 h a simultaneous data assimilation of surface CO2 fluxes and atmospheric CO2 concentrations along with meteorological variables using the Local Ensemble Transform Kalman Filter (LETKF) within an Observing System Simulation Experiments framework. In this paper, we focus on the impact of advanced variance inflation methods and vertical localization of column CO2 data on the analysis of CO2. With both additive inflation and adaptive multiplicative inflation, we are able to obtain encouraging multiseasonal analyses of surface CO2 fluxes in addition to atmospheric CO2 and meteorological analyses. Furthermore, we examine strategies for vertical localization in the assimilation of simulated CO2 from GOSAT that has nearly uniform sensitivity from the surface to the upper troposphere. Since atmospheric CO2 is forced by surface fluxes, its short-term variability should be largest near the surface. We take advantage of this by updating observed changes only into the lower tropospheric CO2 rather than into the full column. This results in a more accurate analysis of CO2 in terms of both RMS error and spatial patterns. Assimilating synthetic CO2 ground-based observations and CO2 retrievals from GOSAT and AIRS with the enhanced LETKF, we obtain an accurate estimation of the evolving surface fluxes even in the absence of any a priori information. We also test the system with a longer assimilation window and find that a short window with an efficient treatment for wind uncertainty is beneficial to flux inversion. Since this study assumes a perfect forecast model, future research will explore the impact of model errors. Citation: Kang, J.-S., E. Kalnay, T. Miyoshi, J. Liu, and I. Fung (2012), Estimation of surface carbon fluxes with an advanced data assimilation methodology, J. Geophys. Res., 117, D24101, doi: 10.1029/2012JD018259.
C1 [Kang, Ji-Sun; Kalnay, Eugenia; Miyoshi, Takemasa] Univ Maryland, Dept Atmospher & Ocean Sci, College Pk, MD 20707 USA.
   [Liu, Junjie] CALTECH, Jet Prop Lab, Pasadena, CA USA.
   [Fung, Inez] Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA.
RP Kang, JS (reprint author), Univ Maryland, Dept Atmospher & Ocean Sci, Coll Pk,3437 CSS Bldg, College Pk, MD 20707 USA.
EM jskang@atmos.umd.edu
RI Miyoshi, Takemasa/C-2768-2009; 
OI Miyoshi, Takemasa/0000-0003-3160-2525; Kalnay,
   Eugenia/0000-0002-9984-9906
FU U.S. Department of Energy under DOE [DEFG0207ER64437]; NASA
   [NNH09ZDA001N-TERRAQUA]
FX We are grateful to the U.S. Department of Energy for the support of the
   research project, "Carbon data assimilation with coupled Ensemble Kalman
   filter," under DOE grant DEFG0207ER64437. Support was also received from
   NASA NNH09ZDA001N-TERRAQUA. We thank Kayo Ide, Brian Hunt and other
   members of Weather-Chaos group at the University of Maryland and Fuqing
   Zhang of PSU for fruitful discussions.
NR 56
TC 17
Z9 17
U1 1
U2 37
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-897X
J9 J GEOPHYS RES-ATMOS
JI J. Geophys. Res.-Atmos.
PD DEC 19
PY 2012
VL 117
AR D24101
DI 10.1029/2012JD018259
PG 18
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 061AQ
UT WOS:000312819900002
ER

PT J
AU Pan, QJ
   Ashour-Abdalla, M
   El-Alaoui, M
   Walker, RJ
   Goldstein, ML
AF Pan, Qingjiang
   Ashour-Abdalla, Maha
   El-Alaoui, Mostafa
   Walker, Raymond J.
   Goldstein, Melvyn L.
TI Adiabatic acceleration of suprathermal electrons associated with
   dipolarization fronts
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
ID PLASMA SHEET; MAGNETIC RECONNECTION; MAGNETOTAIL; SIMULATIONS; ONSET
AB Recent observations in the inner magnetotail have shown rapid and significant flux increases (usually an order of magnitude of increase within seconds) of suprathermal electrons (tens of keV to hundreds of keV) associated with earthward moving dipolarization fronts. To explain where and how these suprathermal electrons are produced during substorm intervals, two types of acceleration models have been suggested by previous studies: acceleration that localizes near the reconnection site and acceleration that occurs during earthward transport. We perform an analytical analysis of adiabatic acceleration to show that the slope of source differential fluxes is critical for understanding adiabatic flux enhancements during earthward transport. Observationally, two earthward propagating dipolarization fronts accompanied by energetic electron flux enhancements observed by the THEMIS spacecraft have been analyzed; in each event the properties of dipolarization fronts in the inner magnetosphere (X-GSM approximate to -10R(E)) were well correlated with those further down the tail (X-GSM approximate to -15R(E) or X-GSM approximate to -20R(E)). Coupled with theoretical analysis, this enables us to estimate the relative acceleration that occurred as the electrons propagated earthward between the two spacecraft. During the two events studied, the differential fluxes of supra thermal electrons had steep energy spectra with power law indices of -4 to -6. These spectra were much steeper than those at lower energy, as well as those of the supra thermal electrons observed before the fronts arrived. A compression factor of 1.5 as the electrons propagated earthward induced a flux increase of suprathermal electrons by a factor of 7 to 17. Provided these steep spectra, we demonstrate that adiabatic acceleration from the betatron and Fermi mechanisms simultaneously operating can account for these flux increases. Since both analytical analysis and data from the two events show that adiabatic acceleration during earthward transport does not significantly change the power law indices, the steep spectra were likely to be traced back to their source region, presumably near the reconnection site.
C1 [Pan, Qingjiang; Ashour-Abdalla, Maha; El-Alaoui, Mostafa; Walker, Raymond J.] Univ Calif Los Angeles, Inst Geophys & Planetary Phys, Los Angeles, CA 90095 USA.
   [Pan, Qingjiang; Ashour-Abdalla, Maha; El-Alaoui, Mostafa] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA.
   [Walker, Raymond J.] Univ Calif Los Angeles, Dept Earth & Space Sci, Los Angeles, CA 90095 USA.
   [Goldstein, Melvyn L.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
RP Pan, QJ (reprint author), Univ Calif Los Angeles, Inst Geophys & Planetary Phys, Los Angeles, CA 90095 USA.
EM chaseidea@ucla.edu
RI NASA MMS, Science Team/J-5393-2013
OI NASA MMS, Science Team/0000-0002-9504-5214
FU Magnetospheric Multiscale Mission Interdisciplinary Scientist grant
   (NASA grant at UCLA) [NNX08AO48G]; Geospace grant (NASA grant)
   [NNX12AD13G]; NASA Advanced Supercomputing Facility at the Ames Research
   Center
FX The research at UCLA and at the Goddard Space Flight Center was
   supported by a Magnetospheric Multiscale Mission Interdisciplinary
   Scientist grant (NASA grant NNX08AO48G at UCLA) and at UCLA was also
   supported by Geospace grant (NASA grant NNX12AD13G). Qingjiang Pan
   thanks Robert Richard and David Schriver for helpful discussions. This
   work was completed while R. J. Walker served at the National Science
   Foundation as Program Director for Magnetospheric Physics. We
   acknowledge V. Angelopoulos and THEMIS Science Support team for use of
   data and software from the THEMIS Mission, and specifically, C. W.
   Carlson and J. P. McFadden for the use of ESA data, D. Larson and R. P.
   Lin for the use of SST data, D. L. Turner for calibration of SST data,
   K. H. Glassmeier, U. Auster and W. Baumjohann for the use of FGM data.
   The MHD computations for Event #1 were carried out with the support of
   the NASA Advanced Supercomputing Facility at the Ames Research Center.
   UCLA Institute of Geophysics and Planetary Physics publication 5808.
NR 37
TC 15
Z9 15
U1 0
U2 9
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0148-0227
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD DEC 19
PY 2012
VL 117
AR A12224
DI 10.1029/2012JA018156
PG 9
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 061DO
UT WOS:000312827500001
ER

PT J
AU Emboras, A
   Briggs, RM
   Najar, A
   Nambiar, S
   Delacour, C
   Grosse, P
   Augendre, E
   Fedeli, JM
   de Salvo, B
   Atwater, HA
   de Lamaestre, RE
AF Emboras, A.
   Briggs, R. M.
   Najar, A.
   Nambiar, S.
   Delacour, C.
   Grosse, Ph.
   Augendre, E.
   Fedeli, J. M.
   de Salvo, B.
   Atwater, H. A.
   de Lamaestre, R. Espiau
TI Efficient coupler between silicon photonic and
   metal-insulator-silicon-metal plasmonic waveguides
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID MODULATOR; SURFACE
AB We report the experimental realization of a compact, efficient coupler between silicon waveguides and vertical metal-insulator-silicon-metal (MISM) plasmonic waveguides. Devices were fabricated using complementary metal-oxide-silicon technology processes, with copper layers that support low-loss plasmonic modes in the MISM structures at a wavelength of 1550 nm. By implementing a short (0.5 mu m) optimized metal-insulator-silicon-insulator structure inserted between the photonic and plasmonic waveguide sections, we demonstrate experimental coupling loss of 2.5 dB, despite the high optical confinement of the MISM mode and mismatch with the silicon waveguide mode. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4772941]
C1 [Emboras, A.; Najar, A.; Nambiar, S.; Delacour, C.; Grosse, Ph.; Augendre, E.; Fedeli, J. M.; de Salvo, B.; de Lamaestre, R. Espiau] CEA, LETI, Grenoble, France.
   [Briggs, R. M.; Atwater, H. A.] CALTECH, Thomas J Watson Labs Appl Phys, Pasadena, CA 91125 USA.
   [Briggs, R. M.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
RP Emboras, A (reprint author), CEA, LETI, MINATEC Campus,17 Rue Martyrs, Grenoble, France.
EM roch.espiau-de-lamaestre@cea.fr
FU French National Agency (ANR) through LETI Carnot Funding
FX This work has been supported by the French National Agency (ANR) through
   LETI Carnot Funding. We acknowledge the LETI CMOS platform team for
   assistance in sample fabrication and K. Gilbert for technical
   contribution to the optical experiments.
NR 15
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PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD DEC 17
PY 2012
VL 101
IS 25
AR 251117
DI 10.1063/1.4772941
PG 4
WC Physics, Applied
SC Physics
GA 060LR
UT WOS:000312780000017
ER

PT J
AU Jau, YY
   Partner, H
   Schwindt, PDD
   Prestage, JD
   Kellogg, JR
   Yu, N
AF Jau, Y. -Y.
   Partner, H.
   Schwindt, P. D. D.
   Prestage, J. D.
   Kellogg, J. R.
   Yu, N.
TI Low-power, miniature Yb-171 ion clock using an ultra-small vacuum
   package
SO APPLIED PHYSICS LETTERS
LA English
DT Article
ID ATOMIC CLOCK; FREQUENCY
AB We report a demonstration of a very small microwave atomic clock using the 12.6 GHz hyperfine transition of the trapped Yb-171 ions inside a miniature, completely sealed-off 3 cm(3) ion-trap vacuum package. In the ion clock system, all of the components are highly miniaturized with low power consumption except the 369 nm optical pumping laser still under development for miniaturization. The entire clock, including the control electronics, consumes <300 mW. The fractional frequency instability of the miniature Yb+ clock reaches the 10(-14) range after a few days of integration. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4767454]
C1 [Jau, Y. -Y.; Partner, H.; Schwindt, P. D. D.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
   [Partner, H.] Univ New Mexico, Dept Phys & Astron, Ctr Quantum Informat & Control CQuIC, Albuquerque, NM 87131 USA.
   [Prestage, J. D.; Kellogg, J. R.; Yu, N.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
RP Jau, YY (reprint author), Sandia Natl Labs, POB 5800, Albuquerque, NM 87185 USA.
EM yjau@sandia.gov
FU United States Department of Energy [DE-AC04-94AL85000]; Defense Advanced
   Research Projects Agency (DARPA) [017081218]
FX We would like to thank Darwin Serkland at Sandia for fabricating the 935
   nm VCSEL and Robert Lutwak, Sheng Chang, and Taye Gebrewold at
   Symmetricom, Inc. for developing the electronic control board. Sandia is
   a multiprogram laboratory operated by Sandia Corporation, a Lockheed
   Martin Company, for the United States Department of Energy under
   Contract DE-AC04-94AL85000. Part of this work was performed at the Jet
   Propulsion Laboratory, California Institute of Technology, under a
   contract with NASA. This work was supported by Defense Advanced Research
   Projects Agency (DARPA) micro-PNT program, IMPACT effort under agreement
   # 017081218. The views expressed are those of the authors and do not
   reflect the official policy or position of the Department of Defense or
   the U. S. Government.
NR 15
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PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0003-6951
J9 APPL PHYS LETT
JI Appl. Phys. Lett.
PD DEC 17
PY 2012
VL 101
IS 25
AR 253518
DI 10.1063/1.4767454
PG 4
WC Physics, Applied
SC Physics
GA 060LR
UT WOS:000312780000110
ER

PT J
AU Song, XL
   Zhang, GJ
   Li, JLF
AF Song, Xiaoliang
   Zhang, Guang J.
   Li, J. -L. F.
TI Evaluation of Microphysics Parameterization for Convective Clouds in the
   NCAR Community Atmosphere Model CAM5
SO JOURNAL OF CLIMATE
LA English
DT Article
ID SYSTEM-RESOLVING MODEL; CUMULUS CLOUDS; VERSION-3 CAM3; GLOBAL
   PRECIPITATION; NUCLEATION PROCESSES; CLIMATE SIMULATIONS; SIZE
   DISTRIBUTIONS; DROPLET SPECTRA; DEEP CONVECTION; NUMERICAL-MODEL
AB A physically based two-moment microphysics parameterization scheme for convective clouds is implemented in the NCAR Community Atmosphere Model version 5 (CAMS) to improve the representation of convective clouds and their interaction with large-scale clouds and aerosols. The explicit treatment of mass mixing ratio and number concentration of cloud and precipitation particles enables the scheme to account for the impact of aerosols on convection. The scheme is linked to aerosols through cloud droplet activation and ice nucleation processes and to stratiform cloud parameterization through convective detrainment of cloud liquid/ice water content (LWC/IWC) and droplet/crystal number concentration (DNC/CNC). A 5-yr simulation with the new convective microphysics scheme shows that both cloud LWC/IWC and DNC/CNC are in good agreement with observations, indicating the scheme describes microphysical processes in convection well. Moreover, the microphysics scheme is able to represent the aerosol effects on convective clouds such as the suppression of warm rain formation and enhancement of freezing when aerosol loading is increased. With more realistic simulations of convective cloud microphysical properties and their detrainment, the mid- and low-level cloud fraction is increased significantly over the ITCZ-southern Pacific convergence zone (SPCZ) and subtropical oceans, making it much closer to the observations. Correspondingly, the serious negative bias in cloud liquid water path over subtropical oceans observed in the standard CAMS is reduced markedly. The large-scale precipitation is increased and precipitation distribution is improved as well. The long-standing precipitation bias in the western Pacific is significantly alleviated because of microphysics-thermodynamics feedbacks.
C1 [Song, Xiaoliang; Zhang, Guang J.] Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA.
   [Li, J. -L. F.] CALTECH, Jet Prop Lab, Pasadena, CA USA.
RP Song, XL (reprint author), Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA.
EM xisong@ucsd.edu
FU U.S. Department of Energy Office of Science (BER) [DE-SC0000805];
   National Science Foundation [EaSM-1048995, ATM-0832915]; U.S. National
   Oceanic and Atmospheric Administration [NA08OAR4320894]
FX This research was supported by the U.S. Department of Energy Office of
   Science (BER) under Grant DE-SC0000805, National Science Foundation
   Grants EaSM-1048995 and ATM-0832915, and U.S. National Oceanic and
   Atmospheric Administration Grant NA08OAR4320894. The computational
   support for this work was provided by the NCAR Computational and
   Information Systems Laboratory. The authors thank Ulrike Lohmann for
   helpful discussion and the anonymous reviewers for their valuable
   comments that helped improve the presentation of the paper.
NR 82
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U2 34
PU AMER METEOROLOGICAL SOC
PI BOSTON
PA 45 BEACON ST, BOSTON, MA 02108-3693 USA
SN 0894-8755
J9 J CLIMATE
JI J. Clim.
PD DEC 15
PY 2012
VL 25
IS 24
BP 8568
EP 8590
DI 10.1175/JCLI-D-11-00563.1
PG 23
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 058IX
UT WOS:000312628400014
ER

PT J
AU Scott, JM
   Haykowsky, MJ
   Eggebeen, J
   Morgan, TM
   Brubaker, PH
   Kitzman, DW
AF Scott, Jessica M.
   Haykowsky, Mark J.
   Eggebeen, Joel
   Morgan, Timothy M.
   Brubaker, Peter H.
   Kitzman, Dalane W.
TI Reliability of Peak Exercise Testing in Patients With Heart Failure With
   Preserved Ejection Fraction
SO AMERICAN JOURNAL OF CARDIOLOGY
LA English
DT Article
ID OXYGEN-UPTAKE; GAS-EXCHANGE; REPRODUCIBILITY; PREVALENCE; PARAMETERS;
   SLOPE
AB Exercise intolerance is the primary symptom in patients with heart failure and preserved ejection fraction (HFpEF), a major determinant of their decreased quality of life, and an important outcome in clinical trials. Although cardiopulmonary exercise testing (CPET) provides peak and submaximal diagnostic indexes, the reliability of peak treadmill CPET in patients >55 years of age with HFpEF has not been examined. Two CPETs were performed in 52 patients with HFpEF (70 +/- 7 years old). The 2 tests were separated by an average of 23 +/- 13 days (median 22) and performed under identical conditions, with no intervention or change in status between visits except for initiation of a placebo run-in. A multistep protocol for patient screening, education, and quality control was used. Mean peak oxygen consumption was similar on tests 1 and 2 (14.4 +/- 2.4 vs 14.3 +/- 2.3 ml/kg/min). Correlation coefficients and intraclass correlations from the testing days were determined (oxygen consumption, r = 0.85, p <0.001, intraclass correlation 0.855; ventilatory anaerobic threshold, r = 0.79, p <0.001, intraclass correlation 0.790; ventilation per carbon dioxide slope, r = 0.87, p <0.001, intraclass correlation 0.864; heart rate, r = 0.94, p <0.001, intraclass correlation 0.938). These results challenge conventional wisdom that serial baseline testing is required in clinical trials with exercise-capacity outcomes. In conclusion, in women and men with HFpEF and severe physical dysfunction, key submaximal and peak ET variables exhibited good reliability and were not significantly altered by a learning effect or placebo administration. (C) 2012 Elsevier Inc. All rights reserved. (Am J Cardiol 2012;110:1809-1813)
C1 [Eggebeen, Joel; Kitzman, Dalane W.] Wake Forest Univ, Bowman Gray Sch Med, Dept Internal Med, Cardiol Sect, Winston Salem, NC 27103 USA.
   [Eggebeen, Joel; Kitzman, Dalane W.] Wake Forest Univ, Bowman Gray Sch Med, Dept Internal Med, Sect Geriatr, Winston Salem, NC 27103 USA.
   [Scott, Jessica M.] NASA, Lyndon B Johnson Space Ctr, Univ Space Res Assoc, Houston, TX 77058 USA.
   [Haykowsky, Mark J.] Univ Alberta, Edmonton, AB, Canada.
   [Morgan, Timothy M.] Wake Forest Univ Hlth Sci, Div Publ Hlth Sci, Winston Salem, NC USA.
   [Brubaker, Peter H.] Wake Forest Univ, Dept Hlth & Exercise Sci, Winston Salem, NC 27109 USA.
RP Kitzman, DW (reprint author), Wake Forest Univ, Bowman Gray Sch Med, Dept Internal Med, Cardiol Sect, Winston Salem, NC 27103 USA.
EM dkitzman@wfubmc.edu
FU National Institutes of Health, Bethesda, Maryland [R37AG18915,
   P30AG21332]; Novartis Pharmaceuticals, East Hanover, New Jersey;
   Novartis; Boston Scientific Corp.
FX This study was supported in part by Grants R37AG18915 and P30AG21332
   from the National Institutes of Health, Bethesda, Maryland, and by an
   investigator-initiated grant from Novartis Pharmaceuticals, East
   Hanover, New Jersey. Dr. Kitzman is a consultant for Relypsa, Inc.,
   Boston Scientific Corp., and Abbot; has received grant support from
   Novartis; and owns stock in Gilead Sciences. Dr. Brubaker is a
   consultant to and has received research support from Boston Scientific
   Corp.
NR 17
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U1 1
U2 6
PU EXCERPTA MEDICA INC-ELSEVIER SCIENCE INC
PI BRIDGEWATER
PA 685 ROUTE 202-206 STE 3, BRIDGEWATER, NJ 08807 USA
SN 0002-9149
J9 AM J CARDIOL
JI Am. J. Cardiol.
PD DEC 15
PY 2012
VL 110
IS 12
BP 1809
EP 1813
DI 10.1016/j.amjcard.2012.08.015
PG 5
WC Cardiac & Cardiovascular Systems
SC Cardiovascular System & Cardiology
GA 056TK
UT WOS:000312514100016
PM 22981266
ER

PT J
AU Boynton, WV
   Droege, GF
   Mitrofanov, IG
   McClanahan, TP
   Sanin, AB
   Litvak, ML
   Schaffner, M
   Chin, G
   Evans, LG
   Garvin, JB
   Harshman, K
   Malakhov, A
   Milikh, G
   Sagdeev, R
   Starr, R
AF Boynton, W. V.
   Droege, G. F.
   Mitrofanov, I. G.
   McClanahan, T. P.
   Sanin, A. B.
   Litvak, M. L.
   Schaffner, M.
   Chin, G.
   Evans, L. G.
   Garvin, J. B.
   Harshman, K.
   Malakhov, A.
   Milikh, G.
   Sagdeev, R.
   Starr, R.
TI High spatial resolution studies of epithermal neutron emission from the
   lunar poles: Constraints on hydrogen mobility
SO JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
LA English
DT Article
ID GAMMA-RAY SPECTROMETER; DETECTOR EXPERIMENT LEND; SOUTH-POLE;
   RECONNAISSANCE ORBITER; DYNAMIC ALBEDO; DAN EXPERIMENT; ICE DEPOSITS;
   MARS ODYSSEY; MOON; PROSPECTOR
AB The data from the collimated sensors of the LEND instrument are shown to be of exceptionally high quality. Counting uncertainties are about 0.3% relative and are shown to be the only significant source of random error, thus conclusions based on small differences in count rates are valid. By comparison with the topography of Shoemaker crater, the spatial resolution of the instrument is shown to be consistent with the design value of 5 km for the radius of the circle over which half the counts from the lunar surface would be determined. The observed epithermal-neutron suppression factor due to the hydrogen deposit in Shoemaker crater of 0.25 +/- 0.04 cps is consistent with the collimated field-of-view rate of 1.7 cps estimated by Mitrofanov et al. (2010a). The statistical significance of the neutron suppressed regions (NSRs) relative to the larger surrounding polar region is demonstrated, and it is shown that they are not closely related to the permanently shadowed regions. There is a significant increase in H content in the polar regions independent of the H content of the NSRs. The non-NSR H content increases directly with latitude, and the rate of increase is virtually identical at both poles. There is little or no increase with latitude outside the polar region. Various mechanisms to explain this steep increase in the non-NSR polar H with latitude are investigated, and it is suggested that thermal volatilization is responsible for the increase because it is minimized at the low surface temperatures close to the poles. Citation: Boynton, W. V., et al. (2012), High spatial resolution studies of epithermal neutron emission from the lunar poles: Constraints on hydrogen mobility, J. Geophys. Res., 117, E00H33, doi:10.1029/2011JE003979.
C1 [Boynton, W. V.; Droege, G. F.; Schaffner, M.; Harshman, K.] Univ Arizona, Lunar & Planetary Lab, Tucson, AZ 85721 USA.
   [Mitrofanov, I. G.; Sanin, A. B.; Litvak, M. L.; Malakhov, A.] RAS, Inst Space Res, Moscow 117901, Russia.
   [McClanahan, T. P.; Chin, G.; Garvin, J. B.] NASA, Goddard Space Flight Ctr, Astrochem Lab, Greenbelt, MD 20771 USA.
   [Evans, L. G.] Comp Sci Corp, Lanham, MD USA.
   [Milikh, G.; Sagdeev, R.] Univ Maryland, Dept Space Phys, College Pk, MD 20742 USA.
   [Starr, R.] Catholic Univ Amer, Dept Phys, Washington, DC 20064 USA.
RP Boynton, WV (reprint author), Univ Arizona, Lunar & Planetary Lab, Tucson, AZ 85721 USA.
EM wboynton@lpl.arizona.edu
FU NASA grant [NNX09AW01G]; NSF grant [ANT-0739620]
FX This work is dedicated to Gerard Droege, a great friend and brilliant
   colleague, who recently passed away after a long fight with cancer. His
   intellectual contribution to this work, for which we will be forever
   grateful, was extraordinary. This work was supported in part by NASA
   grant NNX09AW01G. The McMurdo neutron monitor is operated by the
   University of Delaware Bartol Research Institute with support from NSF
   grant ANT-0739620. We are grateful for reviews from N. Schorghofer, M.
   Siegler, and several anonymous reviews, all of which helped improve the
   work substantially.
NR 55
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U2 6
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0148-0227
J9 J GEOPHYS RES-PLANET
JI J. Geophys. Res.-Planets
PD DEC 15
PY 2012
VL 117
AR E00H33
DI 10.1029/2011JE003979
PG 19
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 055FR
UT WOS:000312401200001
ER

PT J
AU Vondrak, RR
AF Vondrak, Richard R.
TI Introduction to special section on Results of the Lunar Reconnaissance
   Orbiter Mission
SO JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
LA English
DT Article
AB Since 2009 the Lunar Reconnaissance Orbiter (LRO) has made comprehensive measurements of the Moon and its environment. The seven LRO instruments use a variety of primarily remote sensing techniques to obtain a unique set of observations. The analyses of the LRO data sets have overturned previous beliefs and deepened our appreciation of the complex nature of our nearest neighbor. This introduction to the special section describes the LRO mission and summarizes some of the science results in the papers that follow. Citation: Vondrak, R. R. (2012), Introduction to special section on Results of the Lunar Reconnaissance Orbiter Mission, J. Geophys. Res., 117, E00H01, doi:10.1029/2012JE004298.
C1 NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
RP Vondrak, RR (reprint author), NASA, Goddard Space Flight Ctr, Code 690, Greenbelt, MD 20771 USA.
EM richard.vondrak@nasa.gov
NR 1
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U1 0
U2 5
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0148-0227
J9 J GEOPHYS RES-PLANET
JI J. Geophys. Res.-Planets
PD DEC 15
PY 2012
VL 117
AR E00H01
DI 10.1029/2012JE004298
PG 3
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 055FR
UT WOS:000312401200002
ER

PT J
AU Lipatov, AS
   Cooper, JF
   Sittler, EC
   Hartle, RE
AF Lipatov, A. S.
   Cooper, J. F.
   Sittler, E. C., Jr.
   Hartle, R. E.
TI Effects of Na+ and He+ pickup ions on the lunar-like plasma environment:
   3D hybrid modeling
SO ADVANCES IN SPACE RESEARCH
LA English
DT Article
DE Exospheres; Pickup ions; Induced magnetospheres; Satellites; Pickup
   ions; Plasma modeling
ID SOLAR-WIND; SIMULATIONS; WAKE; MOON; ATMOSPHERE; EXOSPHERE; SODIUM;
   COMETS; FIELD
AB In this report we discuss the self-consistent dynamics of pickup ions in the solar wind flow around the lunar-like object. In our model the solar wind and pickup ions are considered as a particles, whereas the electrons are described as a fluid. inhomogeneous photoionization, electron-impact ionization and charge exchange are included in our model. The Moon will be chosen as a basic object for our modeling. The current modeling shows that mass loading by pickup ions Na+ and He+ may be very important in the global dynamics of the solar wind around the Moon. In our hybrid modeling we use exponential profiles for the exospheric components. The Moon is considered as a weakly conducting body. Special attention will be paid to comparing the modeling pickup ion velocity distribution with ARTEMIS observations. Our modeling shows an asymmetry of the Mach cone due to mass loading, the upstream flow density distribution and the magnetic field. The pickup ions form an asymmetrical plasma tails that may disturb the lunar plasma wake. (C) 2012 COSPAR. Published by Elsevier Ltd. All rights reserved.
C1 [Lipatov, A. S.] GPHI UMBC NASA GSFC, Greenbelt, MD 20771 USA.
   [Cooper, J. F.; Sittler, E. C., Jr.; Hartle, R. E.] NASA Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
RP Lipatov, AS (reprint author), GPHI UMBC NASA GSFC, Code 673, Greenbelt, MD 20771 USA.
EM Alexander.Lipatov-1@nasa.gov; John.F.Cooper@nasa.gov;
   Edward.C.Sittler@nasa.gov; Richard.E.Hartle@nasa.gov
FU NASA NRA: Lunar Advance Science and Exploration Research Program
   [NNH08ZDA001-LASER]; GPHI/GEST Center UMBC [670-90-315]; NASA GSFC
   [670-90-315]; NASA Ames Advanced Supercomputing (NAS) Division
   [SMD-10-1517]
FX A.S.L., J.F.C., E.C.S., and R.E.H were supported by the Grant Solar Wind
   Interaction with Lunar Exosphere and Surface (PI - J.F. Cooper) from the
   NASA NRA: Lunar Advance Science and Exploration Research Program
   (NNH08ZDA001-LASER). A.S.L. was also supported in part by the grant/task
   670-90-315 between the GPHI/GEST Center UMBC and NASA GSFC.
   Computational resources were provided by the NASA Ames Advanced
   Supercomputing (NAS) Division (Project SMD-10-1517).
NR 44
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U1 0
U2 5
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0273-1177
EI 1879-1948
J9 ADV SPACE RES
JI Adv. Space Res.
PD DEC 15
PY 2012
VL 50
IS 12
BP 1583
EP 1591
DI 10.1016/j.asr.2012.07.009
PG 9
WC Astronomy & Astrophysics; Geosciences, Multidisciplinary; Meteorology &
   Atmospheric Sciences
SC Astronomy & Astrophysics; Geology; Meteorology & Atmospheric Sciences
GA 036HY
UT WOS:000311018200002
ER

PT J
AU Getty, SA
   Brinckerhoff, WB
   Cornish, T
   Ecelberger, S
   Floyd, M
AF Getty, Stephanie A.
   Brinckerhoff, William B.
   Cornish, Timothy
   Ecelberger, Scott
   Floyd, Melissa
TI Compact two-step laser time-of-flight mass spectrometer for in situ
   analyses of aromatic organics on planetary missions
SO RAPID COMMUNICATIONS IN MASS SPECTROMETRY
LA English
DT Article
ID MULTIPHOTON IONIZATION; METEORITIC SAMPLES; DESORPTION; MOLECULES
AB RATIONALE A miniature time-of-flight mass spectrometer measuring 20 cm in length has been adapted to demonstrate two-step laser desorption/ionization (LDI) in a compact instrument package for enhanced organics detection. Two-step LDI decouples the desorption and ionization processes, relative to traditional LDI, in order to produce low-fragmentation mass spectra of organic analytes. Tuning the UV ionization laser energy would allow control of the degree of fragmentation, which might enable better identification of constituent species.
   METHODS A reflectron time-of-flight mass spectrometer prototype was modified to allow a two-laser configuration, with IR (1064 nm) desorption followed by UV (266 nm) postionization. A relatively low ion extraction voltage of 5 kV was applied at the sample inlet.
   RESULTS The instrument capabilities and performance were demonstrated with analysis of a model polycyclic aromatic hydrocarbon, representing a class of compounds important to the fields of Earth and planetary science. Two-step laser mass spectrometry (L2MS) analysis of a model PAH, pyrene, was demonstrated, including molecular ion identification and the onset of tunable fragmentation as a function of ionizing laser energy. Mass resolution m/Delta m=380 at full width at half-maximum was achieved for gas-phase postionization of desorbed neutrals in this highly compact mass analyzer.
   CONCLUSIONS Achieving L2MS in a highly miniaturized instrument enables a powerful approach to the detection and characterization of aromatic organics in remote terrestrial and planetary applications. Tunable detection of molecular and fragment ions with high mass resolution, diagnostic of molecular structure, is possible on such a compact L2MS instrument. The selectivity of L2MS against low-mass inorganic salt interferences is a key advantage when working with unprocessed, natural samples, and a mechanism for the observed selectivity is proposed. Copyright (C) 2012 John Wiley & Sons, Ltd.
C1 [Getty, Stephanie A.; Brinckerhoff, William B.; Floyd, Melissa] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
   [Cornish, Timothy; Ecelberger, Scott] C&E Res Inc, Columbia, MD 21045 USA.
RP Getty, SA (reprint author), NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
EM Stephanie.A.Getty@nasa.gov
RI Getty, Stephanie/D-7037-2012; Brinckerhoff, William/F-3453-2012
OI Brinckerhoff, William/0000-0001-5121-2634
FU NASA Astrobiology Science and Technology Instrument Development Program;
   NASA Goddard Space Flight Center Internal Research and Development
   Program
FX The authors acknowledge support from the NASA Astrobiology Science and
   Technology Instrument Development Program and the NASA Goddard Space
   Flight Center Internal Research and Development Program. SG acknowledges
   helpful discussions with M. Callahan and J. Elsila.
NR 20
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U2 28
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0951-4198
J9 RAPID COMMUN MASS SP
JI Rapid Commun. Mass Spectrom.
PD DEC 15
PY 2012
VL 26
IS 23
BP 2786
EP 2790
DI 10.1002/rcm.6393
PG 5
WC Biochemical Research Methods; Chemistry, Analytical; Spectroscopy
SC Biochemistry & Molecular Biology; Chemistry; Spectroscopy
GA 031XU
UT WOS:000310676700017
PM 23124670
ER

PT J
AU Johnson, CL
   Purucker, ME
   Korth, H
   Anderson, BJ
   Winslow, RM
   Al Asad, MMH
   Slavin, JA
   Alexeev, II
   Phillips, RJ
   Zuber, MT
   Solomon, SC
AF Johnson, Catherine L.
   Purucker, Michael E.
   Korth, Haje
   Anderson, Brian J.
   Winslow, Reka M.
   Al Asad, Manar M. H.
   Slavin, James A.
   Alexeev, Igor. I.
   Phillips, Roger J.
   Zuber, Maria T.
   Solomon, Sean C.
TI MESSENGER observations of Mercury's magnetic field structure
SO JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
LA English
DT Article
ID SOLAR-WIND; SHELL GEOMETRY; DYNAMO ACTION; MAGNETOPAUSE; MAGNETOSPHERE;
   MODELS; FLYBY; CORE
AB We present a baseline, time-averaged model for Mercury's magnetosphere, derived from MESSENGER Magnetometer data from 24 March to 12 December 2011, comprising the spacecraft's first three Mercury years in orbit around the innermost planet. The model, constructed under the approximation that the magnetospheric shape can be represented as a paraboloid of revolution, includes two external (magnetopause and magnetotail) current systems and an internal (dipole) field and allows for reconnection. We take advantage of the geometry of the orbital Magnetometer data to estimate all but one of the model parameters, and their ranges, directly from the observations. These parameters are then used as a priori constraints in the paraboloid magnetospheric model, and the sole remaining parameter, the dipole moment, is estimated as 190 nT R-M(3) from a grid search. We verify that the best fit dipole moment is insensitive to changes in the other parameters within their determined ranges. The model provides an excellent first-order fit to the MESSENGER observations, with a root-mean-square misfit of less than 20 nT globally. The results show that the magnetopause field strength ranges from 10% to 50% of the dipole field strength at observation locations on the dayside and at nightside latitudes north of 60 degrees N. Globally, the residual signatures observed to date are dominated by the results of magnetospheric processes, confirming the dynamic nature of Mercury's magnetosphere. Citation: Johnson, C. L., et al. (2012), MESSENGER observations of Mercury's magnetic field structure, J. Geophys. Res., 117, E00L14, doi:10.1029/2012JE004217.
C1 [Johnson, Catherine L.; Winslow, Reka M.; Al Asad, Manar M. H.] Univ British Columbia, Dept Earth Ocean & Atmospher Sci, Vancouver, BC V6T 1Z4, Canada.
   [Johnson, Catherine L.] Inst Plant Sci, Tucson, AZ USA.
   [Purucker, Michael E.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
   [Korth, Haje; Anderson, Brian J.] Johns Hopkins Univ, Appl Phys Lab, Laurel, MD USA.
   [Slavin, James A.] Univ Michigan, Dept Atmospher Ocean & Space Sci, Ann Arbor, MI 48109 USA.
   [Alexeev, Igor. I.] Moscow MV Lomonosov State Univ, Skobeltsyn Inst Nucl Phys, Moscow, Russia.
   [Phillips, Roger J.] SW Res Inst, Planetary Sci Directorate, Boulder, CO USA.
   [Zuber, Maria T.] MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA USA.
   [Solomon, Sean C.] Carnegie Inst Sci, Dept Terr Magnetism, Washington, DC 20015 USA.
   [Solomon, Sean C.] Columbia Univ, Lamont Doherty Geol Observ, Palisades, NY 10964 USA.
RP Johnson, CL (reprint author), Univ British Columbia, Dept Earth Ocean & Atmospher Sci, 6339 Stores Rd, Vancouver, BC V6T 1Z4, Canada.
EM cjohnson@eos.ubc.ca
RI Slavin, James/H-3170-2012; Alexeev, Igor/G-8773-2011
OI Slavin, James/0000-0002-9206-724X; 
FU NASA Discovery Program [NAS5-97271, NASW-00002]; MESSENGER Participating
   Scientist [NNX11AB84G, NNH08CC05C]; Natural Sciences and Engineering
   Research Council of Canada; Russian Foundation for Basic Research
   [11-05-00894-a, 12-02-92600-KO_a]; European FP7 project IMPEx [262863]
FX The MESSENGER project is supported by the NASA Discovery Program under
   contracts NAS5-97271 to The Johns Hopkins University Applied Physics
   Laboratory and NASW-00002 to the Carnegie Institution of Washington.
   C.L.J. and M.E.P. are supported by MESSENGER Participating Scientist
   grants NNX11AB84G and NNH08CC05C. R.M.W. and C.L.J. acknowledge support
   from the Natural Sciences and Engineering Research Council of Canada.
   I.I.A. is supported by the Russian Foundation for Basic Research grants
   11-05-00894-a and 12-02-92600-KO_a and the European FP7 project IMPEx
   (262863). We thank three anonymous reviewers for helpful comments.
NR 44
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U1 0
U2 43
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9097
J9 J GEOPHYS RES-PLANET
JI J. Geophys. Res.-Planets
PD DEC 14
PY 2012
VL 117
AR E00L14
DI 10.1029/2012JE004217
PG 22
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 055FO
UT WOS:000312400900001
ER

PT J
AU Nemmen, RS
   Georganopoulos, M
   Guiriec, S
   Meyer, ET
   Gehrels, N
   Sambruna, RM
AF Nemmen, R. S.
   Georganopoulos, M.
   Guiriec, S.
   Meyer, E. T.
   Gehrels, N.
   Sambruna, R. M.
TI A Universal Scaling for the Energetics of Relativistic Jets from Black
   Hole Systems
SO SCIENCE
LA English
DT Article
ID ACTIVE GALACTIC NUCLEI; GAMMA-RAY BURSTS; FUNDAMENTAL PLANE; POWER;
   ACCRETION; FERMI; LUMINOSITIES; AFTERGLOW; BLAZARS; ENERGY
AB Black holes generate collimated, relativistic jets, which have been observed in gamma-ray bursts (GRBs), microquasars, and at the center of some galaxies [active galactic nuclei (AGN)]. How jet physics scales from stellar black holes in GRBs to the supermassive ones in AGN is still unknown. Here, we show that jets produced by AGN and GRBs exhibit the same correlation between the kinetic power carried by accelerated particles and the gamma-ray luminosity, with AGN and GRBs lying at the low-and high-luminosity ends, respectively, of the correlation. This result implies that the efficiency of energy dissipation in jets produced in black hole systems is similar over 10 orders of magnitude in jet power, establishing a physical analogy between AGN and GRBs.
C1 [Nemmen, R. S.; Georganopoulos, M.; Guiriec, S.; Gehrels, N.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
   [Georganopoulos, M.] Univ Maryland Baltimore Cty, Dept Phys, Baltimore, MD 21250 USA.
   [Meyer, E. T.] Rice Univ, Dept Phys & Astron, Houston, TX 77005 USA.
   [Sambruna, R. M.] George Mason Univ, Dept Phys & Astron, Fairfax, VA 22030 USA.
   [Meyer, E. T.] Space Telescope Sci Inst, Baltimore, MD 21218 USA.
RP Nemmen, RS (reprint author), NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
EM rodrigo.nemmen@nasa.gov
RI Nemmen, Rodrigo/O-6841-2014
FU NASA Postdoctoral Program at Goddard Space Flight Center; NASA
FX We thank J. Racusin, M. Lister, C. Dermer, A. Pushkarev, J. McEnery, D.
   Donato, D. Kazanas, T. Nelson, and F. Tombesi for crucial discussions.
   R.S.N. and S. G. were supported by an appointment to the NASA
   Postdoctoral Program at Goddard Space Flight Center, administered by Oak
   Ridge Associated Universities through a contract with NASA. This
   research has made use of: (i) StatCodes statistical software hosted by
   The Pennsylvania State University's Center for Astrostatistics; (ii)
   data obtained from the HETE science team via the Web site
   http://space.mit.edu/HETE/Bursts/Data (HETE is an international mission
   of the NASA Explorer program, run by the Massachusetts Institute of
   Technology); and (iii) NASA/IPAC Extragalactic Database (NED), which is
   operated by the Jet Propulsion Laboratory, California Institute of
   Technology, under contract with NASA.
NR 35
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Z9 59
U1 2
U2 11
PU AMER ASSOC ADVANCEMENT SCIENCE
PI WASHINGTON
PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 USA
SN 0036-8075
EI 1095-9203
J9 SCIENCE
JI Science
PD DEC 14
PY 2012
VL 338
IS 6113
BP 1445
EP 1448
DI 10.1126/science.1227416
PG 4
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 053DN
UT WOS:000312250800041
PM 23239730
ER

PT J
AU Lang, C
   Waugh, DW
   Olsen, MA
   Douglass, AR
   Liang, Q
   Nielsen, JE
   Oman, LD
   Pawson, S
   Stolarski, RS
AF Lang, C.
   Waugh, D. W.
   Olsen, M. A.
   Douglass, A. R.
   Liang, Q.
   Nielsen, J. E.
   Oman, L. D.
   Pawson, S.
   Stolarski, R. S.
TI The impact of greenhouse gases on past changes in tropospheric ozone
SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
LA English
DT Article
ID CHEMISTRY-CLIMATE MODEL; STRATOSPHERIC OZONE; PREINDUSTRIAL TIMES;
   TEMPERATURE TRENDS; TRANSPORT MODEL; GMI CHEMISTRY; TROPOPAUSE;
   SIMULATIONS; EMISSIONS; POLLUTION
AB The impact of changes in the abundance of greenhouse gases (GHGs) on the evolution of tropospheric ozone (O-3) between 1960 and 2005 is examined using a version of the Goddard Earth Observing System chemistry-climate model (GEOS CCM) with a combined troposphere-stratosphere chemical mechanism. Simulations are performed to isolate the relative role of increases in methane (CH4) and stratospheric ozone depleting substances (ODSs) on tropospheric O-3. The 1960 to 2005 increases in GHGs (CO2, N2O, CH4, and ODSs) cause increases of around 1-8% in zonal-mean tropospheric O3 in the tropics and northern extratropics, but decreases of 2-4% in most of the southern extratropics. These O-3 changes are due primarily to increases in CH4 and ODSs, which cause changes of comparable magnitude but opposite sign. The CH4-related increases in O-3 are similar in each hemisphere (similar to 6%), but the ODS-related decreases in the southern extratropics are much larger than in northern extratropics (10% compared to 2%). This results in an interhemispheric difference in the sign of past O-3 change. Increases in the other GHGs (CO2 and N2O) and SSTs have only a small impact on the total burden over this period, but do cause zonal variations in the sign of changes in tropical O-3 that are coupled to changes in vertical velocities and water vapor. Citation: Lang, C., D. W. Waugh, M. A. Olsen, A. R. Douglass, Q. Liang, J. E. Nielsen, L. D. Oman, S. Pawson, and R. S. Stolarski (2012), The impact of greenhouse gases on past changes in tropospheric ozone, J. Geophys. Res., 117, D23304, doi:10.1029/2012JD018293.
C1 [Lang, C.; Waugh, D. W.; Stolarski, R. S.] Johns Hopkins Univ, Dept Earth & Planetary Sci, Baltimore, MD 21218 USA.
   [Olsen, M. A.] Morgan State Univ, Baltimore, MD 21239 USA.
   [Olsen, M. A.; Douglass, A. R.; Liang, Q.; Nielsen, J. E.; Oman, L. D.; Pawson, S.; Stolarski, R. S.] NASA Goddard Space Flight Ctr, Greenbelt, MD USA.
   [Liang, Q.] Univ Space Res Assoc, Columbia, MD USA.
   [Nielsen, J. E.] Sci Syst & Applicat Inc, Lanham, MD USA.
RP Waugh, DW (reprint author), Johns Hopkins Univ, Dept Earth & Planetary Sci, 3400 N Charles St, Baltimore, MD 21218 USA.
EM waugh@jhu.edu
RI Oman, Luke/C-2778-2009; Douglass, Anne/D-4655-2012; Liang,
   Qing/B-1276-2011; Stolarski, Richard/B-8499-2013; Pawson,
   Steven/I-1865-2014; Waugh, Darryn/K-3688-2016
OI Oman, Luke/0000-0002-5487-2598; Stolarski, Richard/0000-0001-8722-4012;
   Pawson, Steven/0000-0003-0200-717X; Waugh, Darryn/0000-0001-7692-2798
FU NASA
FX This research was supported by the NASA MAP and ACMAP programs. We would
   like to thank Stacey Frith for helping with the model output processing.
   We also thank those involved in model development at GSFC, and
   high-performance computing resources provided by NASA's Advanced
   Supercomputing Division.
NR 47
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Z9 6
U1 1
U2 38
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-897X
EI 2169-8996
J9 J GEOPHYS RES-ATMOS
JI J. Geophys. Res.-Atmos.
PD DEC 13
PY 2012
VL 117
AR D23304
DI 10.1029/2012JD018293
PG 13
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 055IK
UT WOS:000312408800005
ER

PT J
AU Schmidt, A
   Thordarson, T
   Oman, LD
   Robock, A
   Self, S
AF Schmidt, Anja
   Thordarson, Thorvaldur
   Oman, Luke D.
   Robock, Alan
   Self, Stephen
TI Climatic impact of the long-lasting 1783 Laki eruption: Inapplicability
   of mass-independent sulfur isotopic composition measurements
SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
LA English
DT Article
ID STRATOSPHERIC AEROSOL LAYER; BASALTIC FISSURE ERUPTIONS;
   CHEMICAL-TRANSPORT MODEL; VOLCANIC-ERUPTIONS; TEMPERATURE-CHANGES;
   ATMOSPHERIC IMPACT; SULFATE AEROSOL; SKAFTAR-FIRES; GISS MODELE; ICE
   CORE
AB The long-lasting 1783-1784 CE Laki flood lava eruption in Iceland released around 120 Tg of sulfur dioxide into the upper troposphere/lower stratosphere. Northern Hemisphere temperature proxy records of the 1780s indicate below-average temperatures for up to three years following the eruption. The very warm summer of 1783 in Europe, which was followed by a very cold winter, may have been caused by the eruption, but the mechanisms are not yet well understood. Some studies attributed the cold winter 1783-1784 to natural variability of climate. However, our climate model simulations show that the Laki radiative effects lasted long enough to contribute to the winter cooling. We suggest that sulfur isotopic composition measurements obtained using samples from Greenland ice cores do not provide evidence of either a short-lived volcanic aerosol cloud or a short-lived climatic impact of the Laki eruption. In fact, the applicability of mass-independent sulfur isotopic composition measurements for interpreting the climatic impact of any high-latitude eruption remains yet to be demonstrated. Citation: Schmidt, A., T. Thordarson, L. D. Oman, A. Robock, and S. Self (2012), Climatic impact of the long-lasting 1783 Laki eruption: Inapplicability of mass-independent sulfur isotopic composition measurements, J. Geophys. Res., 117, D23116, doi:10.1029/2012JD018414.
C1 [Schmidt, Anja] Univ Leeds, Sch Earth & Environm, Leeds LS2 9JT, W Yorkshire, England.
   [Thordarson, Thorvaldur] Univ Edinburgh, Grant Inst, Sch GeoSci, Edinburgh EH8 9YL, Midlothian, Scotland.
   [Oman, Luke D.] NASA Goddard Space Flight Ctr, Greenbelt, MD USA.
   [Robock, Alan] Rutgers State Univ, Dept Environm Sci, New Brunswick, NJ 08903 USA.
   [Self, Stephen] Open Univ, Dept Earth & Environm Sci, Milton Keynes MK7 6AA, Bucks, England.
RP Schmidt, A (reprint author), Univ Leeds, Sch Earth & Environm, Leeds LS2 9JT, W Yorkshire, England.
EM a.schmidt@leeds.ac.uk
RI Oman, Luke/C-2778-2009; Thordarson, Thorvaldur/A-8990-2013; Schmidt,
   Anja/C-9617-2012; Thordarson, Thorvaldur/M-2422-2015; Robock,
   Alan/B-6385-2016; 
OI Oman, Luke/0000-0002-5487-2598; Thordarson,
   Thorvaldur/0000-0003-4011-7185; Schmidt, Anja/0000-0001-8759-2843;
   Robock, Alan/0000-0002-6319-5656
FU NERC [NE/I015612/1]; NSF [ATM-0730452, AGS-1157525]
FX We thank I.N. Bindeman and two other reviewers for their thoughtful
   comments and suggestions that helped to improve the manuscript. We also
   thank Sandip Dhomse for the provision of the SLIMCAT ozone data. Anja
   Schmidt is funded through NERC grant NE/I015612/1. Alan Robock is
   supported by NSF grants ATM-0730452 and AGS-1157525.
NR 66
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U1 4
U2 54
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-897X
J9 J GEOPHYS RES-ATMOS
JI J. Geophys. Res.-Atmos.
PD DEC 13
PY 2012
VL 117
AR D23116
DI 10.1029/2012JD018414
PG 10
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 055IK
UT WOS:000312408800006
ER

PT J
AU Sinyuk, A
   Holben, BN
   Smirnov, A
   Eck, TF
   Slutsker, I
   Schafer, JS
   Giles, DM
   Sorokin, M
AF Sinyuk, Alexander
   Holben, Brent N.
   Smirnov, Alexander
   Eck, Thomas F.
   Slutsker, Ilya
   Schafer, Joel S.
   Giles, David M.
   Sorokin, Mikhail
TI Assessment of error in aerosol optical depth measured by AERONET due to
   aerosol forward scattering
SO GEOPHYSICAL RESEARCH LETTERS
LA English
DT Article
ID DESERT DUST; RETRIEVAL; SIZE; SUN
AB We present an analysis of the effect of aerosol forward scattering on the accuracy of aerosol optical depth (AOD) measured by CIMEL Sun photometers. The effect is quantified in terms of AOD and solar zenith angle using radiative transfer modeling. The analysis is based on aerosol size distributions derived from multi-year climatologies of AERONET aerosol retrievals. The study shows that the modeled error is lower than AOD calibration uncertainty (0.01) for the vast majority of AERONET level 2 observations, similar to 99.53%. Only similar to 0.47% of the AERONET database corresponding mostly to dust aerosol with high AOD and low solar elevations has larger biases. We also show that observations with extreme reductions in direct solar irradiance do not contribute to level 2 AOD due to low Sun photometer digital counts below a quality control cutoff threshold. Citation: Sinyuk, A., B. N. Holben, A. Smirnov, T. F. Eck, I. Slutsker, J. S. Schafer, D. M. Giles, and M. Sorokin (2012), Assessment of error in aerosol optical depth measured by AERONET due to aerosol forward scattering, Geophys. Res. Lett., 39, L23806, doi: 10.1029/2012GL053894.
C1 [Sinyuk, Alexander; Holben, Brent N.; Smirnov, Alexander; Eck, Thomas F.; Slutsker, Ilya; Schafer, Joel S.; Giles, David M.; Sorokin, Mikhail] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
   [Sinyuk, Alexander; Smirnov, Alexander; Slutsker, Ilya; Schafer, Joel S.; Giles, David M.; Sorokin, Mikhail] Sigma Space Corp, Lanham, MD USA.
   [Eck, Thomas F.] Univ Space Res Assoc, Columbia, MD USA.
RP Sinyuk, A (reprint author), NASA, Goddard Space Flight Ctr, Code 618, Greenbelt, MD 20771 USA.
EM aliaksandr.sinyuk-1@nasa.gov
NR 19
TC 14
Z9 15
U1 0
U2 12
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0094-8276
EI 1944-8007
J9 GEOPHYS RES LETT
JI Geophys. Res. Lett.
PD DEC 13
PY 2012
VL 39
AR L23806
DI 10.1029/2012GL053894
PG 5
WC Geosciences, Multidisciplinary
SC Geology
GA 055BS
UT WOS:000312390600002
ER

PT J
AU Bernitt, S
   Brown, GV
   Rudolph, JK
   Steinbrugge, R
   Graf, A
   Leutenegger, M
   Epp, SW
   Eberle, S
   Kubicek, K
   Mackel, V
   Simon, MC
   Trabert, E
   Magee, EW
   Beilmann, C
   Hell, N
   Schippers, S
   Muller, A
   Kahn, SM
   Surzhykov, A
   Harman, Z
   Keitel, CH
   Clementson, J
   Porter, FS
   Schlotter, W
   Turner, JJ
   Ullrich, J
   Beiersdorfer, P
   Lopez-Urrutia, JRC
AF Bernitt, S.
   Brown, G. V.
   Rudolph, J. K.
   Steinbruegge, R.
   Graf, A.
   Leutenegger, M.
   Epp, S. W.
   Eberle, S.
   Kubicek, K.
   Maeckel, V.
   Simon, M. C.
   Traebert, E.
   Magee, E. W.
   Beilmann, C.
   Hell, N.
   Schippers, S.
   Mueller, A.
   Kahn, S. M.
   Surzhykov, A.
   Harman, Z.
   Keitel, C. H.
   Clementson, J.
   Porter, F. S.
   Schlotter, W.
   Turner, J. J.
   Ullrich, J.
   Beiersdorfer, P.
   Lopez-Urrutia, J. R. Crespo
TI An unexpectedly low oscillator strength as the origin of the Fe XVII
   emission problem
SO NATURE
LA English
DT Article
ID SPECTRAL-LINE INTENSITIES; X-RAY-SPECTRUM; ATOMIC DATA; LABORATORY
   MEASUREMENTS; XMM-NEWTON; CHANDRA; SOLAR; CAPELLA; DENSITY
AB Highly charged iron (Fe16+, here referred to as Fe XVII) produces some of the brightest X-ray emission lines from hot astrophysical objects(1), including galaxy clusters and stellar coronae, and it dominates the emission of the Sun at wavelengths near 15 angstroms. The Fe XVII spectrum is, however, poorly fitted by even the best astrophysical models. A particular problem has been that the intensity of the strongest Fe XVII line is generally weaker than predicted(2,3). This has affected the interpretation of observations by the Chandra and XMM-Newton orbiting X-ray missions(1), fuelling a continuing controversy over whether this discrepancy is caused by incomplete modelling of the plasma environment in these objects or by shortcomings in the treatment of the underlying atomic physics. Here we report the results of an experiment in which a target of iron ions was induced to fluoresce by subjecting it to femtosecond X-ray pulses from a free-electron laser(4); our aim was to isolate a key aspect of the quantum mechanical description of the line emission. Surprisingly, we find a relative oscillator strength that is unexpectedly low, differing by 3.6 sigma from the best quantum mechanical calculations. Our measurements suggest that the poor agreement is rooted in the quality of the underlying atomic wavefunctions rather than in insufficient modelling of collisional processes.
C1 [Bernitt, S.; Rudolph, J. K.; Steinbruegge, R.; Epp, S. W.; Eberle, S.; Kubicek, K.; Maeckel, V.; Beilmann, C.; Harman, Z.; Keitel, C. H.; Ullrich, J.; Lopez-Urrutia, J. R. Crespo] Max Planck Inst Kernphys, D-69117 Heidelberg, Germany.
   [Brown, G. V.; Graf, A.; Traebert, E.; Magee, E. W.; Hell, N.; Clementson, J.; Beiersdorfer, P.] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA.
   [Rudolph, J. K.; Schippers, S.; Mueller, A.] Univ Giessen, Inst Atom & Mol Phys, D-35392 Giessen, Germany.
   [Leutenegger, M.; Porter, F. S.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
   [Leutenegger, M.] Univ Maryland, Dept Phys, Baltimore, MD 21250 USA.
   [Epp, S. W.] Ctr Free Electron Laser Sci, Max Planck Adv Study Grp, D-22607 Hamburg, Germany.
   [Simon, M. C.] TRIUMF, Vancouver, BC V6T 2A3, Canada.
   [Hell, N.] Univ Erlangen Nurnberg, Dr Karl Remeis Sternwarte Bamberg, D-96049 Bamberg, Germany.
   [Hell, N.] Univ Erlangen Nurnberg, Erlangen Ctr Astroparticle Phys, D-96049 Bamberg, Germany.
   [Kahn, S. M.] SLAC Natl Accelerator Lab, Kavli Inst Particle Astrophys & Cosmol, Menlo Pk, CA 94025 USA.
   [Surzhykov, A.] Univ Heidelberg, Inst Phys, D-69120 Heidelberg, Germany.
   [Surzhykov, A.] GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany.
   [Harman, Z.] ExtreMe Matter Inst EMMI, D-64291 Darmstadt, Germany.
   [Schlotter, W.; Turner, J. J.] SLAC Natl Accelerator Lab, Linac Coherent Light Source, Menlo Pk, CA 94025 USA.
RP Bernitt, S (reprint author), Max Planck Inst Kernphys, D-69117 Heidelberg, Germany.
EM sven.bernitt@mpi-hd.mpg.de
RI Muller, Alfred/A-3548-2009; Porter, Frederick/D-3501-2012; Crespo
   Lopez-Urrutia, Jose R./F-7069-2011; Schippers, Stefan/A-7786-2008; 
OI Muller, Alfred/0000-0002-0030-6929; Porter,
   Frederick/0000-0002-6374-1119; Crespo Lopez-Urrutia, Jose
   R./0000-0002-2937-8037; Schippers, Stefan/0000-0002-6166-7138; Hell,
   Natalie/0000-0003-3057-1536; Epp, Sascha/0000-0001-6366-9113
FU LCLS; Stanford University through the Stanford Institute for Materials
   Energy Sciences; Stanford University through Lawrence Berkeley National
   Laboratory; University of Hamburg through the BMBF; Center for Free
   Electron Laser Science; US Department of Energy; Helmholtz Alliance.;
   Helmholtz association; EMMI; BMBF; Deutsche Forschungsgemeinschaft
FX We thank the staff at MPIK, LLNL and SLAC, especially D. Layne (LLNL)
   who provided technical support. Portions of this research were carried
   out on the SXR instrument at the LCLS, a division of SLAC National
   Accelerator Laboratory and an Office of Science user facility operated
   by Stanford University for the US Department of Energy. The SXR
   instrument is funded by a consortium whose membership includes the LCLS,
   Stanford University through the Stanford Institute for Materials Energy
   Sciences, Lawrence Berkeley National Laboratory, University of Hamburg
   through the BMBF priority programme, and the Center for Free Electron
   Laser Science. The present work was performed in part at LLNL under the
   auspices of the US Department of Energy and supported in part by the
   Helmholtz Alliance. P. B. performed part of the work reported here while
   at the Department of Chemistry and the Chemical Physics Program,
   University of Puerto Rico. A.S. was supported by the Helmholtz
   association and Z.H. was supported by EMMI. N.H. acknowledges support
   from BMBF, and E. T., A.M., J.K.R. and S.S. acknowledge support from the
   Deutsche Forschungsgemeinschaft.
NR 30
TC 47
Z9 47
U1 1
U2 45
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 0028-0836
J9 NATURE
JI Nature
PD DEC 13
PY 2012
VL 492
IS 7428
BP 225
EP 228
DI 10.1038/nature11627
PG 4
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 053GM
UT WOS:000312259300036
PM 23235875
ER

PT J
AU Hulley, GC
   Hughes, CG
   Hook, SJ
AF Hulley, Glynn C.
   Hughes, Christopher G.
   Hook, Simon J.
TI Quantifying uncertainties in land surface temperature and emissivity
   retrievals from ASTER and MODIS thermal infrared data
SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
LA English
DT Article
ID ATMOSPHERIC CORRECTION; RADIOSOUNDING DATABASE; SEPARATION ALGORITHM;
   VALIDATION; PRODUCTS; IMAGERY; SIMULATIONS; CLIMATE; MEXICO; SPACE
AB Land surface temperature and emissivity (LST&E) data are essential for a wide variety of surface-atmosphere studies, from calculating the evapotranspiration of the Earth's land surface to retrieving atmospheric water vapor. LST&E products are generated from thermal infrared data acquired from sensors such as ASTER and MODIS on NASA's EOS platforms. NASA has identified a major need to develop long-term, consistent products valid across multiple missions, with well-defined uncertainty statistics addressing specific Earth science questions. These products are termed Earth System Data Records (ESDRs) and LST&E have been identified as an important ESDR. Currently a lack of understanding in LST&E uncertainties limits their usefulness in land surface and climate models. To address this issue, a LST&E uncertainty simulator has been developed to quantify and model uncertainties for a variety of TIR sensors and LST algorithms. Using the simulator, uncertainties were estimated for the MODIS and ASTER TES algorithm, including water vapor scaling (WVS). These uncertainties were parameterized according to view angle and estimated total column water vapor for application to real data. The standard ASTER TES algorithm had a RMSE of 3.1 K (1.2 K with WVS), while the MODIS TES algorithm had a RMSE of 4.5 K (1.5 K with WVS). Accuracies in retrieved spectral emissivity for both sensors degraded with higher atmospheric water content, however, with WVS the emissivity uncertainties were reduced to <0.015. Accurately quantifying uncertainties in LST&E products not only improves their utility and understanding but will also enable the data to be fused into long-term, well characterized ESDRs. Citation: Hulley, G. C., C. G. Hughes, and S. J. Hook (2012), Quantifying uncertainties in land surface temperature and emissivity retrievals from ASTER and MODIS thermal infrared data, J. Geophys. Res., 117, D23113, doi:10.1029/2012JD018506.
C1 [Hulley, Glynn C.; Hughes, Christopher G.; Hook, Simon J.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
RP Hulley, GC (reprint author), CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
EM glynn.hulley@jpl.nasa.gov
FU ROSES NASA Earth System Data Records Uncertainty Analysis Program [NRA
   NNH10ZDA001N]; National Aeronautics and Space Administration
FX The research described in this paper was carried out at the Jet
   Propulsion Laboratory, California Institute of Technology, under a
   contract with the National Aeronautics and Space Administration. This
   study is supported by the ROSES 2010 NASA Earth System Data Records
   Uncertainty Analysis Program (NRA NNH10ZDA001N).
NR 57
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PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-897X
J9 J GEOPHYS RES-ATMOS
JI J. Geophys. Res.-Atmos.
PD DEC 12
PY 2012
VL 117
AR D23113
DI 10.1029/2012JD018506
PG 18
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 055II
UT WOS:000312408600004
ER

PT J
AU Iguchi, T
   Matsui, T
   Shi, JJ
   Tao, WK
   Khain, AP
   Hou, A
   Cifelli, R
   Heymsfield, A
   Tokay, A
AF Iguchi, Takamichi
   Matsui, Toshihisa
   Shi, Jainn J.
   Tao, Wei-Kuo
   Khain, Alexander P.
   Hou, Arthur
   Cifelli, Robert
   Heymsfield, Andrew
   Tokay, Ali
TI Numerical analysis using WRF-SBM for the cloud microphysical structures
   in the C3VP field campaign: Impacts of supercooled droplets and
   resultant riming on snow microphysics
SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
LA English
DT Article
ID SPECTRAL BIN MICROPHYSICS; MESOSCALE MODEL MM5; ICE CRYSTALS; PART I;
   VERTICAL DIFFUSION; SIMULATION; PRECIPITATION; PARTICLES; AEROSOLS;
   GRAUPEL
AB Two distinct snowfall events are observed over the region near the Great Lakes during 19-23 January 2007 under the intensive measurement campaign of the Canadian CloudSat/CALIPSO validation project (C3VP). These events are numerically investigated using the Weather Research and Forecasting model coupled with a spectral bin microphysics (WRF-SBM) scheme that allows a smooth calculation of riming process by predicting the rimed mass fraction on snow aggregates. The fundamental structures of the observed two snowfall systems are distinctly characterized by a localized intense lake-effect snowstorm in one case and a widely distributed moderate snowfall by the synoptic-scale system in another case. Furthermore, the observed microphysical structures are distinguished by differences in bulk density of solid-phase particles, which are probably linked to the presence or absence of supercooled droplets. The WRF-SBM coupled with Goddard Satellite Data Simulator Unit (G-SDSU) has successfully simulated these distinctive structures in the three-dimensional weather prediction run with a horizontal resolution of 1 km. In particular, riming on snow aggregates by supercooled droplets is considered to be of importance in reproducing the specialized microphysical structures in the case studies. Additional sensitivity tests for the lake-effect snowstorm case are conducted utilizing different planetary boundary layer (PBL) models or the same SBM but without the riming process. The PBL process has a large impact on determining the cloud microphysical structure of the lake-effect snowstorm as well as the surface precipitation pattern, whereas the riming process has little influence on the surface precipitation because of the small height of the system. Citation: Iguchi, T., T. Matsui, J. J. Shi, W.-K. Tao, A. P. Khain, A. Hou, R. Cifelli, A. Heymsfield, and A. Tokay (2012), Numerical analysis using WRF-SBM for the cloud microphysical structures in the C3VP field campaign: Impacts of supercooled droplets and resultant riming on snow microphysics, J. Geophys. Res., 117, D23206, doi:10.1029/2012JD018101.
C1 [Iguchi, Takamichi; Matsui, Toshihisa; Shi, Jainn J.; Tao, Wei-Kuo; Hou, Arthur; Tokay, Ali] NASA, Goddard Space Flight Ctr, Atmospheres Lab, Greenbelt, MD 20771 USA.
   [Iguchi, Takamichi; Matsui, Toshihisa] Univ Maryland, Earth Syst Sci Interdisciplinary Ctr, College Pk, MD 20742 USA.
   [Shi, Jainn J.] Morgan State Univ, Baltimore, MD 21239 USA.
   [Khain, Alexander P.] Hebrew Univ Jerusalem, Inst Earth Sci, Dept Atmospher Sci, IL-91904 Jerusalem, Israel.
   [Cifelli, Robert] NOAA, Earth Syst Res Lab, Boulder, CO USA.
   [Heymsfield, Andrew] Natl Ctr Atmospher Res, Boulder, CO 80307 USA.
   [Tokay, Ali] Univ Maryland, Joint Ctr Earth Syst Technol, Baltimore, MD 21201 USA.
RP Iguchi, T (reprint author), NASA, Goddard Space Flight Ctr, Atmospheres Lab, Greenbelt, MD 20771 USA.
EM takamichi.iguchi@nasa.gov
RI Heymsfield, Andrew/E-7340-2011; Measurement, Global/C-4698-2015
FU NASA Precipitation Measuring Mission (PMM); NASA Modeling Analysis
   Prediction (MAP); Israel Science Foundation [140/07]
FX This study was supported by the NASA Precipitation Measuring Mission
   (PMM) and NASA Modeling Analysis Prediction (MAP). One of the authors
   (A. Khain) is supported by a grant from the Israel Science Foundation
   (140/07). The authors wish to acknowledge the developers of the WRF and
   HUCM models.
NR 60
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PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-897X
J9 J GEOPHYS RES-ATMOS
JI J. Geophys. Res.-Atmos.
PD DEC 12
PY 2012
VL 117
AR D23206
DI 10.1029/2012JD018101
PG 22
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 055II
UT WOS:000312408600001
ER

PT J
AU Gagne, ME
   Melo, SML
   Brecht, AS
   Bougher, SW
   Strong, K
AF Gagne, Marie-Eve
   Melo, Stella M. L.
   Brecht, Amanda S.
   Bougher, Stephen W.
   Strong, Kimberly
TI Modeled O-2 nightglow distributions in the Venusian atmosphere
SO JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
LA English
DT Article
ID ATOMIC OXYGEN; GENERAL-CIRCULATION; MARTIAN ATMOSPHERE; LOWER
   THERMOSPHERE; MIDDLE ATMOSPHERE; RATE CONSTANTS; GRAVITY-WAVES;
   VIRTIS-M; AIRGLOW; EXPRESS
AB In this paper, we study the global distribution of the O-2 Infrared Atmospheric (0-0) emission at 1.27 mu m in the Venusian atmosphere with an airglow model in combination with atmospheric conditions provided by a three-dimensional model, the Venus Thermospheric Global Circulation Model. We compare our model simulations with airglow observations of this emission from the Visible and InfraRed Thermal Imaging Spectrometer on board the Venus Express orbiter. Our model is successful in reproducing the latitudinal and temporal trends seen in the observations for latitudes between 0 degrees and 30 degrees, while poleward of 30 degrees, the model results start to diverge away from the measurements. We attribute this discrepancy to the atomic oxygen distribution at these latitudes in our model that is inconsistent with the recent measurements. We also conducted a sensitivity study to explore the dependence of the vertical structure and the distribution of the airglow emission on the atmospheric conditions. The sensitivity study confirms that changes in the distribution of atomic oxygen significantly affect the characteristics of the airglow layer. Therefore, meaningful comparisons with observations require a three-dimensional model, which accounts for dynamical variations in the background atmosphere. With this investigation, we highlight the impact of the atmospheric conditions on the airglow distribution, which is important for the understanding of how the phenomenon plays. Citation: Gagn, M.-E., S. M. L. Melo, A. S. Brecht, S. W. Bougher, K. Strong (2012), Modeled O-2 nightglow distributions in the Venusian atmosphere, J. Geophys. Res., 117, E12002, doi: 10.1029/2012JE004102.
C1 [Gagne, Marie-Eve; Melo, Stella M. L.] Canadian Space Agcy, Space Sci & Technol, St Hubert, PQ J3Y 8Y9, Canada.
   [Gagne, Marie-Eve; Strong, Kimberly] Univ Toronto, Dept Phys, Toronto, ON, Canada.
   [Brecht, Amanda S.] NASA, Planetary Syst Branch, Ames Res Ctr, Moffett Field, CA USA.
   [Bougher, Stephen W.] Univ Michigan, Dept Atmospher Ocean & Space Sci, Ann Arbor, MI 48109 USA.
RP Gagne, ME (reprint author), Canadian Space Agcy, Space Sci & Technol, St Hubert, PQ J3Y 8Y9, Canada.
EM megagne@atmosp.physics.utoronto.ca
RI Bougher, Stephen/C-1913-2013; 
OI Bougher, Stephen/0000-0002-4178-2729; Gagne,
   Marie-Eve/0000-0002-0387-3072
FU Fonds Quebecois de la Recherche sur la Nature et les Technologies;
   Natural Sciences and Engineering Research Council of Canada; Canadian
   Space Agency; NASA [NNX08AG18G]
FX The authors are grateful to Giuseppe Piccioni for the useful exchanges
   and help regarding the interpretation of the VIRTIS data. The authors
   would like to acknowledge the Fonds Quebecois de la Recherche sur la
   Nature et les Technologies, the Natural Sciences and Engineering
   Research Council of Canada, and the Canadian Space Agency for funding.
   They would also like to acknowledge NASA (grant NNX08AG18G) for
   supporting this research at the University of Michigan.
NR 53
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U2 4
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0148-0227
J9 J GEOPHYS RES-PLANET
JI J. Geophys. Res.-Planets
PD DEC 12
PY 2012
VL 117
AR E12002
DI 10.1029/2012JE004102
PG 10
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 055EC
UT WOS:000312397000001
ER

PT J
AU Talpe, MJ
   Zuber, MT
   Yang, D
   Neumann, GA
   Solomon, SC
   Mazarico, E
   Vilas, F
AF Talpe, Matthieu J.
   Zuber, Maria T.
   Yang, Di
   Neumann, Gregory A.
   Solomon, Sean C.
   Mazarico, Erwan
   Vilas, Faith
TI Characterization of the morphometry of impact craters hosting polar
   deposits in Mercury's north polar region
SO JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
LA English
DT Article
ID LASER ALTIMETER; ICE DEPOSITS; GROUND ICE; MESSENGER; STABILITY; POLES;
   MARS; ANOMALIES; SURFACE; WATER
AB Earth-based radar images of Mercury show radar-bright material inside impact craters near the planet's poles. A previous study indicated that the polar-deposit-hosting craters (PDCs) at Mercury's north pole are shallower than craters that lack such deposits. We use data acquired by the Mercury Laser Altimeter on the MESSENGER spacecraft during 11 months of orbital observations to revisit the depths of craters at high northern latitudes on Mercury. We measured the depth and diameter of 537 craters located poleward of 45 degrees N, evaluated the slopes of the northern and southern walls of 30 PDCs, and assessed the floor roughness of 94 craters, including nine PDCs. We find that the PDCs appear to have a fresher crater morphology than the non-PDCs and that the radar-bright material has no detectable influence on crater depths, wall slopes, or floor roughness. The statistical similarity of crater depth-diameter relations for the PDC and non-PDC populations places an upper limit on the thickness of the radar-bright material (<170 m for a crater 11 km in diameter) that can be refined by future detailed analysis. Results of the current study are consistent with the view that the radar-bright material constitutes a relatively thin layer emplaced preferentially in comparatively young craters. Citation: Talpe, M. J., M. T. Zuber, D. Yang, G. A. Neumann, S. C. Solomon, E. Mazarico, and F. Vilas (2012), Characterization of the morphometry of impact craters hosting polar deposits in Mercury's north polar region, J. Geophys. Res., 117, E00L13, doi: 10.1029/2012JE004155.
C1 [Talpe, Matthieu J.; Zuber, Maria T.; Yang, Di; Mazarico, Erwan] MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA 02139 USA.
   [Neumann, Gregory A.; Mazarico, Erwan] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
   [Solomon, Sean C.] Carnegie Inst Sci, Dept Terr Magnetism, Washington, DC 20015 USA.
   [Solomon, Sean C.] Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY USA.
   [Vilas, Faith] Planetary Sci Inst, Tucson, AZ USA.
RP Talpe, MJ (reprint author), MIT, Dept Earth Atmospher & Planetary Sci, 77 Massachusetts Ave, Cambridge, MA 02139 USA.
EM mtalpe@mit.edu
RI Neumann, Gregory/I-5591-2013; Mazarico, Erwan/N-6034-2014
OI Neumann, Gregory/0000-0003-0644-9944; Mazarico,
   Erwan/0000-0003-3456-427X
FU NASA Discovery Program [NASW-00002, NAS5-97271]
FX We thank Nadine Barlow, an anonymous reviewer, and Associate Editor
   Clark Chapman for helpful comments on an earlier version of this
   manuscript. The MESSENGER project is supported by the NASA Discovery
   Program under contracts NASW-00002 to the Carnegie Institution of
   Washington and NAS5-97271 to The Johns Hopkins University Applied
   Physics Laboratory.
NR 48
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PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0148-0227
J9 J GEOPHYS RES-PLANET
JI J. Geophys. Res.-Planets
PD DEC 12
PY 2012
VL 117
AR E00L13
DI 10.1029/2012JE004155
PG 12
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 055EC
UT WOS:000312397000002
ER

PT J
AU Ylitalo, GM
   Krahn, MM
   Dickhoff, WW
   Stein, JE
   Walker, CC
   Lassitter, CL
   Garrett, ES
   Desfosse, LL
   Mitchell, KM
   Noble, BT
   Wilson, S
   Beck, NB
   Benner, RA
   Koufopoulos, PN
   Dickey, RW
AF Ylitalo, Gina M.
   Krahn, Margaret M.
   Dickhoff, Walton W.
   Stein, John E.
   Walker, Calvin C.
   Lassitter, Cheryl L.
   Garrett, E. Spencer
   Desfosse, Lisa L.
   Mitchell, Karen M.
   Noble, Brandi T.
   Wilson, Steven
   Beck, Nancy B.
   Benner, Ronald A.
   Koufopoulos, Peter N.
   Dickey, Robert W.
TI Federal seafood safety response to the Deepwater Horizon oil spill
SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF
   AMERICA
LA English
DT Article
AB Following the 2010 Deepwater Horizon oil spill, petroleum-related compounds and chemical dispersants were detected in the waters of the Gulf of Mexico. As a result, there was concern about the risk to human health through consumption of contaminated seafood in the region. Federal and Gulf Coast State agencies worked together on a sampling plan and analytical protocols to determine whether seafood was safe to eat and acceptable for sale in the marketplace. Sensory and chemical methods were used to measure polycyclic aromatic hydrocarbons (PAHs) and dispersant in >8,000 seafood specimens collected in federal waters of the Gulf. Overall, individual PAHs and the dispersant component dioctyl sodium sulfosuccinate were found in low concentrations or below the limits of quantitation. When detected, the concentrations were at least two orders of magnitude lower than the level of concern for human health risk. Once an area closed to fishing was free of visibly floating oil and all sensory and chemical results for the seafood species within an area met the criteria for reopening, that area was eligible to be reopened. On April 19, 2011 the area around the wellhead was the last area in federal waters to be reopened nearly 1 y after the spill began. However, as of November 9, 2011, some state waters off the Louisiana coast (Barataria Bay and the Delta region) remain closed to fishing.
C1 [Ylitalo, Gina M.; Krahn, Margaret M.; Dickhoff, Walton W.; Stein, John E.] Natl Marine Fisheries Serv, NW Fisheries Sci Ctr, NOAA, Seattle, WA 98112 USA.
   [Walker, Calvin C.; Lassitter, Cheryl L.; Garrett, E. Spencer] Natl Marine Fisheries Serv, Natl Seafood Inspect Lab, SE Fisheries Sci Ctr, NOAA, Pascagoula, MS 39567 USA.
   [Desfosse, Lisa L.; Mitchell, Karen M.; Noble, Brandi T.] Natl Marine Fisheries Serv, Mississippi Labs, SE Fisheries Sci Ctr, NOAA, Pascagoula, MS 39567 USA.
   [Wilson, Steven] Natl Marine Fisheries Serv, Seafood Inspect Program, Silver Spring, MD 20910 USA.
   [Beck, Nancy B.] Off Management & Budget, Off Informat & Regulatory Affairs, Washington, DC 20503 USA.
   [Benner, Ronald A.; Dickey, Robert W.] US FDA, Div Seafood Sci & Technol, Gulf Coast Seafood Lab, Ctr Food Safety & Appl Nutr, Dauphin Isl, AL 36528 USA.
   [Koufopoulos, Peter N.] US FDA, Div Seafood Safety, Ctr Food Safety & Appl Nutr, College Pk, MD 20740 USA.
RP Ylitalo, GM (reprint author), Natl Marine Fisheries Serv, NW Fisheries Sci Ctr, NOAA, Seattle, WA 98112 USA.
EM gina.ylitalo@noaa.gov
NR 18
TC 36
Z9 36
U1 7
U2 88
PU NATL ACAD SCIENCES
PI WASHINGTON
PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA
SN 0027-8424
J9 P NATL ACAD SCI USA
JI Proc. Natl. Acad. Sci. U. S. A.
PD DEC 11
PY 2012
VL 109
IS 50
BP 20274
EP 20279
DI 10.1073/pnas.1108886109
PG 6
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 058AF
UT WOS:000312605600035
PM 22315401
ER

PT J
AU Murray, AE
   Kenig, F
   Fritsen, CH
   McKay, CP
   Cawley, KM
   Edwards, R
   Kuhn, E
   McKnight, DM
   Ostrom, NE
   Peng, V
   Ponce, A
   Priscu, JC
   Samarkin, V
   Townsend, AT
   Wagh, P
   Young, SA
   Yung, PT
   Doran, PT
AF Murray, Alison E.
   Kenig, Fabien
   Fritsen, Christian H.
   McKay, Christopher P.
   Cawley, Kaelin M.
   Edwards, Ross
   Kuhn, Emanuele
   McKnight, Diane M.
   Ostrom, Nathaniel E.
   Peng, Vivian
   Ponce, Adrian
   Priscu, John C.
   Samarkin, Vladimir
   Townsend, Ashley T.
   Wagh, Protima
   Young, Seth A.
   Yung, Pung To
   Doran, Peter T.
TI Microbial life at -13 degrees C in the brine of an ice-sealed Antarctic
   lake
SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF
   AMERICA
LA English
DT Article
DE astrobiology; geomicrobiology; microbial ecology; extreme environment
ID ISOTOPIC COMPOSITION; NITROUS-OXIDE; DEEP; METHANE; WATER;
   FRACTIONATION; ENVIRONMENTS; ECOSYSTEMS; DIVERSITY; BIOSPHERE
AB The permanent ice cover of Lake Vida (Antarctica) encapsulates an extreme cryogenic brine ecosystem (-13 degrees C; salinity, 200). This aphotic ecosystem is anoxic and consists of a slightly acidic (pH 6.2) sodium chloride-dominated brine. Expeditions in 2005 and 2010 were conducted to investigate the biogeochemistry of Lake Vida's brine system. A phylogenetically diverse and metabolically active Bacteria dominated microbial assemblage was observed in the brine. These bacteria live under very high levels of reduced metals, ammonia, molecular hydrogen (H-2), and dissolved organic carbon, as well as high concentrations of oxidized species of nitrogen (i.e., supersaturated nitrous oxide and similar to 1 mmol.L-1 nitrate) and sulfur (as sulfate). The existence of this system, with active biota, and a suite of reduced as well as oxidized compounds, is unusual given the millennial scale of its isolation from external sources of energy. The geochemistry of the brine suggests that abiotic brine-rock reactions may occur in this system and that the rich sources of dissolved electron acceptors prevent sulfate reduction and methanogenesis from being energetically favorable. The discovery of this ecosystem and the in situ biotic and abiotic processes occurring at low temperature provides a tractable system to study habitability of isolated terrestrial cryoenvironments (e.g., permafrost cryopegs and subglacial ecosystems), and is a potential analog for habitats on other icy worlds where water-rock reactions may cooccur with saline deposits and subsurface oceans.
C1 [Murray, Alison E.; Fritsen, Christian H.; Kuhn, Emanuele; Peng, Vivian; Wagh, Protima] Desert Res Inst, Div Earth & Ecosyst Sci, Reno, NV 89512 USA.
   [Kenig, Fabien; Doran, Peter T.] Univ Illinois, Dept Earth & Environm Sci, Chicago, IL 60607 USA.
   [McKay, Christopher P.] NASA, Div Space Sci, Ames Res Ctr, Moffett Field, CA 94035 USA.
   [Cawley, Kaelin M.; McKnight, Diane M.] Univ Colorado, Inst Arctic & Alpine Res, Boulder, CO 80309 USA.
   [Edwards, Ross] Curtin Univ Technol, Dept Imaging & Appl Phys, Perth, WA 6845, Australia.
   [Ostrom, Nathaniel E.] Michigan State Univ, Dept Zool, E Lansing, MI 48824 USA.
   [Ponce, Adrian; Yung, Pung To] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
   [Priscu, John C.] Montana State Univ, Dept Land Resources & Environm Sci, Bozeman, MT 59717 USA.
   [Samarkin, Vladimir] Univ Georgia, Dept Marine Sci, Athens, GA 30602 USA.
   [Townsend, Ashley T.] Univ Tasmania, Cent Sci Lab, Hobart, Tas 7001, Australia.
   [Young, Seth A.] Indiana Univ, Dept Geol Sci, Bloomington, IN 47405 USA.
RP Murray, AE (reprint author), Desert Res Inst, Div Earth & Ecosyst Sci, Reno, NV 89512 USA.
EM Alison.Murray@dri.edu
RI Edwards, Ross/B-1433-2013; Kenig, Fabien/A-4961-2008; Townsend,
   Ashley/J-7445-2014; 
OI Edwards, Ross/0000-0002-9233-8775; Townsend, Ashley/0000-0002-2972-2678;
   Kenig, Fabien/0000-0003-4868-5232
FU National Aeronautics and Space Administration (NASA) [ASTEP NAG5-12889];
   NASA-NASA Astrobiology Institute "Icy Worlds"; National Science
   Foundation (NSF) [ANT-0739681, ANT-0739698]
FX We thank J. Kyne and B. Bergeron of Ice Coring and Drilling Services, H.
   Dugan (University of Illinois), B. Wagner (University of Cologne), B.
   Glazer (University of Hawaii), and P. Glenday for field assistance; C.
   Davis (Desert Research Institute), J. R. Henricksen (University of
   Georgia), and A. Johnson (Indiana University) for laboratory assistance;
   S. Ghobrial (University of North Carolina) for the carbohydrate
   concentration determinations; and F. Loffler (University of Texas at
   Knoxville) and P. McLoughlin (Microseeps) for contributing expertise to
   gas-sampling strategies. This work was supported in part by National
   Aeronautics and Space Administration (NASA)-ASTEP NAG5-12889 (to
   P.T.D.); NASA-NASA Astrobiology Institute "Icy Worlds" (to A.E.M.); and
   National Science Foundation (NSF) Awards ANT-0739681 (to A.E.M.) and
   ANT-0739698 (to P.T.D.). In 2005, The NSF Office of Polar Programs
   provided logistical support through a cooperative agreement with NASA.
NR 44
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U2 184
PU NATL ACAD SCIENCES
PI WASHINGTON
PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA
SN 0027-8424
J9 P NATL ACAD SCI USA
JI Proc. Natl. Acad. Sci. U. S. A.
PD DEC 11
PY 2012
VL 109
IS 50
BP 20626
EP 20631
DI 10.1073/pnas.1208607109
PG 6
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 058AF
UT WOS:000312605600097
PM 23185006
ER

PT J
AU Randerson, JT
   Chen, Y
   van der Werf, GR
   Rogers, BM
   Morton, DC
AF Randerson, J. T.
   Chen, Y.
   van der Werf, G. R.
   Rogers, B. M.
   Morton, D. C.
TI Global burned area and biomass burning emissions from small fires
SO JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
LA English
DT Article
ID ETM PLUS DATA; SOUTHERN AFRICA; SPOT-VEGETATION; SATELLITE DATA;
   FOREST-FIRES; TIME-SERIES; DETECTION ALGORITHM; AMAZONIAN FORESTS;
   RADIATIVE ENERGY; AVHRR DATA
AB In several biomes, including croplands, wooded savannas, and tropical forests, many small fires occur each year that are well below the detection limit of the current generation of global burned area products derived from moderate resolution surface reflectance imagery. Although these fires often generate thermal anomalies that can be detected by satellites, their contributions to burned area and carbon fluxes have not been systematically quantified across different regions and continents. Here we developed a preliminary method for combining 1-km thermal anomalies (active fires) and 500 m burned area observations from the Moderate Resolution Imaging Spectroradiometer (MODIS) to estimate the influence of these fires. In our approach, we calculated the number of active fires inside and outside of 500 m burn scars derived from reflectance data. We estimated small fire burned area by computing the difference normalized burn ratio (dNBR) for these two sets of active fires and then combining these observations with other information. In a final step, we used the Global Fire Emissions Database version 3 (GFED3) biogeochemical model to estimate the impact of these fires on biomass burning emissions. We found that the spatial distribution of active fires and 500 m burned areas were in close agreement in ecosystems that experience large fires, including savannas across southern Africa and Australia and boreal forests in North America and Eurasia. In other areas, however, we observed many active fires outside of burned area perimeters. Fire radiative power was lower for this class of active fires. Small fires substantially increased burned area in several continental-scale regions, including Equatorial Asia (157%), Central America (143%), and Southeast Asia (90%) during 2001-2010. Globally, accounting for small fires increased total burned area by approximately by 35%, from 345 Mha/yr to 464 Mha/yr. A formal quantification of uncertainties was not possible, but sensitivity analyses of key model parameters caused estimates of global burned area increases from small fires to vary between 24% and 54%. Biomass burning carbon emissions increased by 35% at a global scale when small fires were included in GFED3, from 1.9 Pg C/yr to 2.5 Pg C/yr. The contribution of tropical forest fires to year-to-year variability in carbon fluxes increased because small fires amplified emissions from Central America, South America and Southeast Asia-regions where drought stress and burned area varied considerably from year to year in response to El Nino-Southern Oscillation and other climate modes. Citation: Randerson, J. T., Y. Chen, G. R. van der Werf, B. M. Rogers, and D. C. Morton ( 2012), Global burned area and biomass burning emissions from small fires, J. Geophys. Res., 117, G04012, doi: 10.1029/2012JG002128.
C1 [Randerson, J. T.; Chen, Y.; Rogers, B. M.] Univ Calif Irvine, Dept Earth Syst Sci, Irvine, CA 92697 USA.
   [van der Werf, G. R.] Vrije Univ Amsterdam, Fac Earth & Life Sci, Amsterdam, Netherlands.
   [Morton, D. C.] NASA, Goddard Space Flight Ctr, Biospher Sci Branch, Greenbelt, MD 20771 USA.
RP Randerson, JT (reprint author), Univ Calif Irvine, Dept Earth Syst Sci, 3212 Croul Hall, Irvine, CA 92697 USA.
EM jranders@uci.edu
RI Morton, Douglas/D-5044-2012; van der Werf, Guido/M-8260-2016
OI van der Werf, Guido/0000-0001-9042-8630
FU NASA [NNX11AF96G, NNX10AT83G]; NSF; EU
FX We thank L. Giglio for careful review of earlier manuscript drafts and
   for sharing the global MCD64A1 data set for this analysis. We thank Y.
   Jin for analysis of the fire time series from Portugal. This study was
   supported by NASA grants NNX11AF96G and NNX10AT83G. B.M.R. received
   support from an NSF Graduate Fellowship. G.R.v.d.W. received support
   from the EU FP7 project MACC-II.
NR 106
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PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-8953
EI 2169-8961
J9 J GEOPHYS RES-BIOGEO
JI J. Geophys. Res.-Biogeosci.
PD DEC 11
PY 2012
VL 117
AR G04012
DI 10.1029/2012JG002128
PG 23
WC Environmental Sciences; Geosciences, Multidisciplinary
SC Environmental Sciences & Ecology; Geology
GA 055IU
UT WOS:000312409900001
ER

PT J
AU Hendrix, AR
   Retherford, KD
   Gladstone, GR
   Hurley, DM
   Feldman, PD
   Egan, AF
   Kaufmann, DE
   Miles, PF
   Parker, JW
   Horvath, D
   Rojas, PM
   Versteeg, MH
   Davis, MW
   Greathouse, TK
   Mukherjee, J
   Steffl, AJ
   Pryor, WR
   Stern, SA
AF Hendrix, Amanda R.
   Retherford, Kurt D.
   Gladstone, G. Randall
   Hurley, Dana M.
   Feldman, Paul D.
   Egan, Anthony F.
   Kaufmann, David E.
   Miles, Paul F.
   Parker, Joel W.
   Horvath, David
   Rojas, Paul M.
   Versteeg, Maarten H.
   Davis, Michael W.
   Greathouse, Thomas K.
   Mukherjee, Joey
   Steffl, Andrew J.
   Pryor, Wayne R.
   Stern, S. Alan
TI The lunar far-UV albedo: Indicator of hydration and weathering
SO JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
LA English
DT Article
ID ULTRAVIOLET ALBEDO; MOON; WAVELENGTHS; ASTEROIDS; MISSION; SURFACE
AB We present an analysis of Lunar Reconnaissance Orbiter (LRO) Lyman Alpha Mapping Project (LAMP) measurements of the dayside lunar surface at far-ultraviolet wavelengths. We use the strong 165 nm H2O absorption edge to look for diurnal variations in hydration. We find that diurnal variations in spectral slope are indeed present; they are superimposed on latitudinal and spatial variations related to composition and weathering. We use two different spectral regions (164-173 nm and 175-190 nm) to separate out these effects. Highlands and mare regions have distinct reflectance spectra, with mare regions being spectrally bluer than highlands regions, a consequence of the greater abundance of opaque minerals in mare regions. Bright ray terrains and areas known to be young such as Giordano Bruno crater, are found to be relatively spectrally flat or red in the far-UV; this is consistent with a lack of space weathering, which tends to make the far-UV spectrum bluer due to the spectral behavior of nanophase iron. Large-scale latitudinal variations in FUV slope are distinct and are likely due to a gradient in space weathering. The diurnal variation in hydration is consistent with a solar wind origin and with loss of H2O at temperatures above similar to 320 K. Far-UV spectroscopy is thus shown to represent a viable method for mapping aqueous alteration, even on the dayside of the Moon, and potentially elsewhere in the solar system. Citation: Hendrix, A. R., et al. (2012), The lunar far-UV albedo: Indicator of hydration and weathering, J. Geophys. Res., 117, E12001, doi:10.1029/2012JE004252.
C1 [Hendrix, Amanda R.] CALTECH, Jet Prop Lab, Pasadena, CA USA.
   [Retherford, Kurt D.; Gladstone, G. Randall; Miles, Paul F.; Horvath, David; Rojas, Paul M.; Versteeg, Maarten H.; Davis, Michael W.; Greathouse, Thomas K.; Mukherjee, Joey] SW Res Inst, San Antonio, TX USA.
   [Feldman, Paul D.] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA.
   [Hurley, Dana M.] Johns Hopkins Univ, Appl Phys Lab, Laurel, MD USA.
   [Egan, Anthony F.; Kaufmann, David E.; Parker, Joel W.; Steffl, Andrew J.; Stern, S. Alan] SW Res Inst, Boulder, CO USA.
   [Pryor, Wayne R.] Cent Arizona Coll, Dept Sci, Coolidge, AZ USA.
RP Hendrix, AR (reprint author), Planetary Sci Inst, 1400 E Ft Lowell,Suite 106, Tucson, AZ 85719 USA.
EM arh@psi.edu
RI Hurley, Dana/F-4488-2015; 
OI Hurley, Dana/0000-0003-1052-1494; Retherford, Kurt/0000-0001-9470-150X;
   Greathouse, Thomas/0000-0001-6613-5731
FU LRO project
FX We thank the LRO project for support of the LAMP observations reported
   here. Lead author ARH is grateful to the Lunar Reconnaissance Orbiter
   Participating Scientist Program and for the generosity of the LAMP team.
   The research described in this paper was carried out at the Jet
   Propulsion Laboratory, California Institute of Technology, under a
   contract with the National Aeronautics and Space Administration. Many
   thanks to Bruce Hapke for valuable advice and comments.
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PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0148-0227
J9 J GEOPHYS RES-PLANET
JI J. Geophys. Res.-Planets
PD DEC 11
PY 2012
VL 117
AR E12001
DI 10.1029/2012JE004252
PG 8
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 055EB
UT WOS:000312396900002
ER

PT J
AU Kodet, J
   Prochazka, I
   Blazej, J
   Sun, XL
   Cavanaugh, J
AF Kodet, Jan
   Prochazka, Ivan
   Blazej, Josef
   Sun, Xiaoli
   Cavanaugh, John
TI Single photon avalanche diode radiation tests
SO NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS
   SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
LA English
DT Article; Proceedings Paper
CT International Conference on New Developments In Photodetection-NDIP11
CY JUL 04-08, 2011
CL Lyon, FRANCE
DE Single photon detection; Radiation hardness; Space-qualified detectors
ID PROTON
AB The single photon counting diodes are recently planned for applications in deep space missions. That is why the proton radiation and gamma ray radiation tests of silicon based single photon avalanche diodes were measured and compared. The main characteristic that changed after the irradiation was effective dark count rate, which was measured using actively quenching and gating circuit. The radiation reached 6.5 krad at 53 MeV protons energy and 34 krad using gamma ray radiation source Co-60. The annealing rates were monitored at room temperature and at 60 degrees C. (C) 2011 Elsevier B.V. All rights reserved.
C1 [Kodet, Jan; Prochazka, Ivan; Blazej, Josef] Czech Tech Univ, Prague 11519 1, Czech Republic.
   [Sun, Xiaoli; Cavanaugh, John] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
RP Blazej, J (reprint author), Czech Tech Univ, Brehova 7, Prague 11519 1, Czech Republic.
EM prochazk@fjfi.cvut.cz; blazej@fjfi.cvut.cz; xiaoli.sun-1@nasa.gov
RI Sun, Xiaoli/B-5120-2013; Blazej, Josef/A-3479-2012
OI Blazej, Josef/0000-0002-7191-0103
FU Grant Agency of the Czech Technical University in Prague
   [SGS10/299/OHK4/3T/14]
FX Authors would like to thank Zdenek Pulec for helping with gamma
   radiation tests, Indiana University Cyclotron Facility and Nuclear
   Research Institute in Rez for providing the tests facility. The research
   and development of solid states detectors and their applications is
   supported by Research Framework MSM6840770015, recent publication was
   supported by the Grant Agency of the Czech Technical University in
   Prague, Grant no. SGS10/299/OHK4/3T/14.
NR 7
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U2 6
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0168-9002
EI 1872-9576
J9 NUCL INSTRUM METH A
JI Nucl. Instrum. Methods Phys. Res. Sect. A-Accel. Spectrom. Dect. Assoc.
   Equip.
PD DEC 11
PY 2012
VL 695
BP 309
EP 312
DI 10.1016/j.nima.2011.11.001
PG 4
WC Instruments & Instrumentation; Nuclear Science & Technology; Physics,
   Nuclear; Physics, Particles & Fields
SC Instruments & Instrumentation; Nuclear Science & Technology; Physics
GA 042KK
UT WOS:000311469900069
ER

PT J
AU Alvarez-Muniz, J
   Carvalho, WR
   Romero-Wolf, A
   Tueros, M
   Zas, E
AF Alvarez-Muniz, Jaime
   Carvalho, Washington R., Jr.
   Romero-Wolf, Andres
   Tueros, Matias
   Zas, Enrique
TI Coherent radiation from extensive air showers in the ultrahigh frequency
   band
SO PHYSICAL REVIEW D
LA English
DT Article
ID MONTE-CARLO SIMULATIONS; RADIO-EMISSION; PULSES
AB Using detailed Monte Carlo simulations we have characterized the features of the radio emission of inclined air showers in the ultrahigh frequency band (300 MHz-3 GHz). The Fourier spectrum of the radiation is shown to have a sizable intensity well into the GHz frequency range. The emission is mainly due to transverse currents induced by the geomagnetic field and the excess charge produced by the Askaryan effect. At these frequencies only a significantly reduced volume of the shower around the axis contributes coherently to the signal observed on the ground. The size of the coherently emitting volume depends on frequency, shower geometry and observer position, and is interpreted in terms of the relative time delays at observation dominated by the curvature of the shower front. At ground level, the maximum emission at high frequencies is concentrated in an elliptical ringlike region around the intersection of a Cherenkov cone with its vertex at shower maximum and the ground. The frequency spectrum of inclined showers when observed at positions that view shower maximum in the Cherenkov direction, is shown to be in broad agreement with the pulses detected by the Antarctic Impulsive Transient Antenna experiment, making the interpretation that they are due to ultrahigh energy cosmic ray atmospheric showers consistent with our simulations. These results are also of great importance for experiments aiming to detect molecular bremsstrahlung radiation in the GHz range as they present an important background for its detection. DOI: 10.1103/PhysRevD.86.123007
C1 [Alvarez-Muniz, Jaime; Carvalho, Washington R., Jr.; Tueros, Matias; Zas, Enrique] Univ Santiago de Compostela, Dept Fis Particulas, Santiago De Compostela 15782, Spain.
   [Alvarez-Muniz, Jaime; Carvalho, Washington R., Jr.; Tueros, Matias; Zas, Enrique] Univ Santiago de Compostela, Inst Galego Fis Altas Enerxias, Santiago De Compostela 15782, Spain.
   [Romero-Wolf, Andres] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
RP Alvarez-Muniz, J (reprint author), Univ Santiago de Compostela, Dept Fis Particulas, Santiago De Compostela 15782, Spain.
RI Alvarez-Muniz, Jaime/H-1857-2015; Carvalho Jr., Washington/H-9855-2015;
   zas, enrique/I-5556-2015
OI Alvarez-Muniz, Jaime/0000-0002-2367-0803; Carvalho Jr.,
   Washington/0000-0002-2328-7628; zas, enrique/0000-0002-4430-8117
FU Xunta de Galicia [INCITE09 206 336 PR]; Conselleria de Educacion (Grupos
   de Referencia Competitivos-Consolider Xunta de Galicia) [2006/51];
   Ministerio de Educacion, Cultura y Deporte [FPA 2010-18410];
   ASPERA-AugerNext [PRI-PIMASP-2011-1154]; Feder Funds, Spain
FX J.A.-M., W.R.C., M.T., and E.Z. thank Xunta de Galicia (INCITE09 206 336
   PR) and Conselleria de Educacion (Grupos de Referencia
   Competitivos-Consolider Xunta de Galicia 2006/51); Ministerio de
   Educacion, Cultura y Deporte (FPA 2010-18410 and Consolider CPAN-Ingenio
   2010); ASPERA-AugerNext (PRI-PIMASP-2011-1154) and Feder Funds, Spain.
   We thank Centro de SuperComputacion de Galicia (CESGA) for computing
   resources. Part of this research was carried out at the Jet Propulsion
   Laboratory, California Institute of Technology, under a contract with
   the National Aeronautics and Space Administration.
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PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 1550-7998
J9 PHYS REV D
JI Phys. Rev. D
PD DEC 10
PY 2012
VL 86
IS 12
AR 123007
DI 10.1103/PhysRevD.86.123007
PG 9
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 050PT
UT WOS:000312067200002
ER

PT J
AU Baines, EK
   White, RJ
   Huber, D
   Jones, J
   Boyajian, T
   McAlister, HA
   ten Brummelaar, TA
   Turner, NH
   Sturmann, J
   Sturmann, L
   Goldfinger, PJ
   Farrington, CD
   Riedel, AR
   Ireland, M
   von Braun, K
   Ridgway, ST
AF Baines, Ellyn K.
   White, Russel J.
   Huber, Daniel
   Jones, Jeremy
   Boyajian, Tabetha
   McAlister, Harold A.
   ten Brummelaar, Theo A.
   Turner, Nils H.
   Sturmann, Judit
   Sturmann, Laszlo
   Goldfinger, P. J.
   Farrington, Christopher D.
   Riedel, Adric R.
   Ireland, Michael
   von Braun, Kaspar
   Ridgway, Stephen T.
TI THE CHARA ARRAY ANGULAR DIAMETER OF HR 8799 FAVORS PLANETARY MASSES FOR
   ITS IMAGED COMPANIONS
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE planetary systems; stars: fundamental parameters; stars: individual (HR
   8799); techniques: high angular resolution; techniques: interferometric
ID LAMBDA-BOOTIS STARS; DUSTY DEBRIS DISKS; ACCRETION DIFFUSION-MODEL;
   GAMMA DORADUS VARIABLES; A-TYPE STARS; UVBY PHOTOMETRY; ULTRAVIOLET
   EXTINCTION; STROMGREN PHOTOMETRY; STELLAR POPULATIONS; SPACE-TELESCOPE
AB HR8799 is an hF0 mA5 gamma Doradus-, lambda Bootis-, Vega-type star best known for hosting four directly imaged candidate planetary companions. Using the CHARA Array interferometer, we measure HR 8799's limb-darkened angular diameter to be 0.342 +/- 0.008 mas (an error of only 2%). By combining our measurement with the star's parallax and photometry from the literature, we greatly improve upon previous estimates of its fundamental parameters, including stellar radius (1.44 +/- 0.06 R-circle dot), effective temperature (7193 +/- 87 K, consistent with F0), luminosity (5.05 +/- 0.29 L-circle dot), and the extent of the habitable zone (HZ; 1.62-3.32 AU). These improved stellar properties permit much more precise comparisons with stellar evolutionary models, from which a mass and age can be determined, once the metallicity of the star is known. Considering the observational properties of other lambda Bootis stars and the indirect evidence for youth of HR 8799, we argue that the internal abundance, and what we refer to as the effective abundance, is most likely near solar. Finally, using the Yonsei-Yale evolutionary models with uniformly scaled solar-like abundances, we estimate HR 8799's mass and age considering two possibilities: 1.516(-0.024)(+0.038) M-circle dot and 33(-13.2)(+7) Myr if the star is contracting toward the zero-age main sequence or 1.513(-0.024)(+0.023) M-circle dot and 90(-50)(+381) Myr if it is expanding from it. This improved estimate of HR 8799's age with realistic uncertainties provides the best constraints to date on the masses of its orbiting companions, and strongly suggests they are indeed planets. They nevertheless all appear to orbit well outside the HZ of this young star.
C1 [Baines, Ellyn K.] USN, Remote Sensing Div, Res Lab, Washington, DC 20375 USA.
   [White, Russel J.; Jones, Jeremy; Boyajian, Tabetha; McAlister, Harold A.; ten Brummelaar, Theo A.; Turner, Nils H.; Sturmann, Judit; Sturmann, Laszlo; Goldfinger, P. J.; Farrington, Christopher D.; Riedel, Adric R.] Georgia State Univ, Ctr High Angular Resolut Astron, Atlanta, GA 30302 USA.
   [Huber, Daniel] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
   [Ireland, Michael] Macquarie Univ, Dept Phys & Astron, N Ryde, NSW 2109, Australia.
   [von Braun, Kaspar] CALTECH, NASA, Exoplanet Sci Inst, Pasadena, CA 91125 USA.
   [Ridgway, Stephen T.] Kitt Peak Natl Observ, Natl Opt Astron Observ, Tucson, AZ 85726 USA.
RP Baines, EK (reprint author), USN, Remote Sensing Div, Res Lab, 4555 Overlook Ave SW, Washington, DC 20375 USA.
EM ellyn.baines@nrl.navy.mil
OI Ireland, Michael/0000-0002-6194-043X; Boyajian,
   Tabetha/0000-0001-9879-9313
FU National Science Foundation [AST-0606958]; Georgia State University
   through the College of Arts and Sciences; National Aeronautics and Space
   Administration [NNH09AK731]
FX We thank Gerard van Belle for his insight on the nature of HR 8799's
   pirouette through space. The CHARA Array is funded by the National
   Science Foundation through NSF grant AST-0606958 and by Georgia State
   University through the College of Arts and Sciences, and S. T. R.
   acknowledges partial support by NASA grant NNH09AK731. This research has
   made use of the SIMBAD database, operated at CDS, Strasbourg, France.
   This publication makes use of data products from the Two Micron All Sky
   Survey, which is a joint project of the University of Massachusetts and
   the Infrared Processing and Analysis Center/California Institute of
   Technology, funded by the National Aeronautics and Space Administration
   and the National Science Foundation.
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PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
EI 1538-4357
J9 ASTROPHYS J
JI Astrophys. J.
PD DEC 10
PY 2012
VL 761
IS 1
AR 57
DI 10.1088/0004-637X/761/1/57
PG 15
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 046ER
UT WOS:000311748800057
ER

PT J
AU Barclay, T
   Huber, D
   Rowe, JF
   Fortney, JJ
   Morley, CV
   Quintana, EV
   Fabrycky, DC
   Barentsen, G
   Bloemen, S
   Christiansen, JL
   Demory, BO
   Fulton, BJ
   Jenkins, J
   Mullally, F
   Ragozzine, D
   Seader, SE
   Shporer, A
   Tenenbaum, P
   Thompson, SE
AF Barclay, Thomas
   Huber, Daniel
   Rowe, Jason F.
   Fortney, Jonathan J.
   Morley, Caroline V.
   Quintana, Elisa V.
   Fabrycky, Daniel C.
   Barentsen, Geert
   Bloemen, Steven
   Christiansen, Jessie L.
   Demory, Brice-Olivier
   Fulton, Benjamin J.
   Jenkins, Jonm.
   Mullally, Fergal
   Ragozzine, Darin
   Seader, Shaun E.
   Shporer, Avi
   Tenenbaum, Peter
   Thompson, Susan E.
TI PHOTOMETRICALLY DERIVED MASSES AND RADII OF THE PLANET AND STAR IN THE
   TrES-2 SYSTEM
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE planets and satellites: individual (TrES-2b); stars: individual
   (TrES-2A); techniques: photometric
ID TRANSIT TIMING OBSERVATIONS; SOLAR-LIKE OSCILLATIONS; HOT JUPITER
   ATMOSPHERES; SPACE-BASED PHOTOMETRY; LIGHT CURVES; EXTRASOLAR PLANETS;
   KEPLER-MISSION; RED GIANTS; ELLIPSOIDAL VARIATIONS; HD 209458B
AB We measure the mass and radius of the star and planet in the TrES-2 system using 2.7 years of observations by the Kepler spacecraft. The light curve shows evidence for ellipsoidal variations and Doppler beaming on a period consistent with the orbital period of the planet with amplitudes of 2.79(-0.62)(+0.44) and 3.44(-0.37)(+0.32) parts per million (ppm), respectively, and a difference between the dayside and the nightside planetary flux of 3.41(-0.82)(+0.55) ppm. We present an asteroseismic analysis of solar-like oscillations on TrES-2A which we use to calculate the stellar mass of 0.94 +/- 0.05 M-circle dot and radius of 0.95 +/- 0.02 R-circle dot. Using these stellar parameters, a transit model fit and the phase-curve variations, we determine the planetary radius of 1.162(-0.024)(+0.020) R-Jup and derive a mass for TrES-2b from the photometry of 1.44 +/- 0.21 M-Jup. The ratio of the ellipsoidal variation to the Doppler beaming amplitudes agrees to better than 2 sigma with theoretical predications, while our measured planet mass and radius agree within 2s of previously published values based on spectroscopic radial velocity measurements. We measure a geometric albedo of 0.0136(-0.0033)(+0.0022) and an occultation (secondary eclipse) depth of 6.5(-1.8)(+1.7) ppm which we combined with the day/night planetary flux ratio to model the atmosphere of TrES-2b. We find that an atmosphere model that contains a temperature inversion is strongly preferred. We hypothesize that the Kepler bandpass probes a significantly greater atmospheric depth on the night side relative to the day side.
C1 [Barclay, Thomas; Huber, Daniel; Rowe, Jason F.; Quintana, Elisa V.; Christiansen, Jessie L.; Jenkins, Jonm.; Mullally, Fergal; Seader, Shaun E.; Tenenbaum, Peter; Thompson, Susan E.] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
   [Barclay, Thomas] Bay Area Environm Res Inst Inc, Sonoma, CA 95476 USA.
   [Rowe, Jason F.; Quintana, Elisa V.; Christiansen, Jessie L.; Jenkins, Jonm.; Mullally, Fergal; Seader, Shaun E.; Tenenbaum, Peter; Thompson, Susan E.] SETI Inst, Mountain View, CA 94043 USA.
   [Fortney, Jonathan J.; Morley, Caroline V.; Fabrycky, Daniel C.] Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA.
   [Barentsen, Geert] Armagh Observ, Armagh BT61 9DG, North Ireland.
   [Bloemen, Steven] Katholieke Univ Leuven, Inst Sterrenkunde, B-3001 Louvain, Belgium.
   [Demory, Brice-Olivier] MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA 02139 USA.
   [Fulton, Benjamin J.; Shporer, Avi] Las Cumbres Observ Global Telescope Network, Santa Barbara, CA 93117 USA.
   [Ragozzine, Darin] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
   [Shporer, Avi] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA.
RP Barclay, T (reprint author), NASA, Ames Res Ctr, M-S 244-30, Moffett Field, CA 94035 USA.
RI Ragozzine, Darin/C-4926-2013; 
OI Fortney, Jonathan/0000-0002-9843-4354; Demory,
   Brice-Olivier/0000-0002-9355-5165; Fabrycky, Daniel/0000-0003-3750-0183
FU NASA Science Mission directorate; NASA [NAS5-26555]; NASA Office of
   Space Science [NNX09AF08G]; European Research Council under the European
   Community [227224]; Research Council of KU Leuven [GOA/2008/04];
   appointment to the NASA Postdoctoral Program at Ames Research Center
FX This paper includes data collected by the Kepler mission. Funding for
   the Kepler mission is provided by the NASA Science Mission directorate.
   All Kepler data presented in this paper were obtained from the Mikulski
   Archive for Space Telescopes (MAST) at the Space Telescope Science
   Institute (STScI). STScI is operated by the Association of Universities
   for Research in Astronomy, Inc., under NASA contract NAS5-26555. Support
   for MAST for non-HST data is provided by the NASA Office of Space
   Science via grant NNX09AF08G and by other grants and contracts. S. B.
   acknowledges funding from the European Research Council under the
   European Community's Seventh Framework Programme (FP7/2007-2013)/ERC
   grant agreement No. 227224 (PROSPERITY), as well as from the Research
   Council of KU Leuven grant agreement GOA/2008/04. We thank Simchon
   Faigler and the Kepler Science Team for providing insightful comments
   during the preparation of this manuscript. D. H. is supported by
   appointment to the NASA Postdoctoral Program at Ames Research Center,
   administered by Oak Ridge Associated Universities through a contract
   with NASA.
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PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD DEC 10
PY 2012
VL 761
IS 1
AR 53
DI 10.1088/0004-637X/761/1/53
PG 10
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 046ER
UT WOS:000311748800053
ER

PT J
AU Crouzet, N
   McCullough, PR
   Burke, C
   Long, D
AF Crouzet, N.
   McCullough, P. R.
   Burke, C.
   Long, D.
TI TRANSMISSION SPECTROSCOPY OF EXOPLANET XO-2b OBSERVED WITH HUBBLE SPACE
   TELESCOPE NICMOS
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE eclipses; methods: observational; planets and satellites: individual
   (XO-2b, XO-1b); techniques: spectroscopic
ID TRANSITING HOT JUPITER; NO CONCLUSIVE EVIDENCE; GIANT PLANET TRANSITS;
   MOLECULAR-FEATURES; DAYSIDE SPECTRUM; LIGHT CURVES; HD 189733B;
   ATMOSPHERE; SIGNATURES; METHANE
AB Spectroscopy during planetary transits is a powerful tool to probe exoplanet atmospheres. We present the near-infrared transit spectroscopy of XO-2b obtained with Hubble Space Telescope NICMOS. Uniquely for NICMOS transit spectroscopy, a companion star of similar properties to XO-2 is present in the field of view. We derive improved star and planet parameters through a photometric white-light analysis. We show a clear correlation of the spectrum noise with instrumental parameters, in particular the angle of the spectral trace on the detector. An MCMC method using a decorrelation from instrumental parameters is used to extract the planetary spectrum. Spectra derived independently from each of the three visits have an rms of 430, 510, and 1000 ppm, respectively. The same analysis is performed on the companion star after numerical injection of a transit with a depth constant at all wavelengths. The extracted spectra exhibit residuals of similar amplitude as for XO-2, which represent the level of remaining NICMOS systematics. This shows that extracting planetary spectra is at the limit of NICMOS's capability. We derive a spectrum for the planet XO-2b using the companion star as a reference. The derived spectrum can be represented by a theoretical model including atmospheric water vapor or by a flat spectrum model. We derive a 3 sigma upper limit of 1570 ppm on the presence of water vapor absorption in the atmosphere of XO-2b. In the Appendix, we perform a similar analysis for the gas giant planet XO-1b.
C1 [Crouzet, N.; McCullough, P. R.; Long, D.] Space Telescope Sci Inst, Baltimore, MD 21218 USA.
   [Burke, C.] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
RP Crouzet, N (reprint author), Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USA.
EM crouzet@stsci.edu
OI Long, Douglas/0000-0002-2508-9211
FU STScI [HST GO-11228]; NASA Origins of Solar Systems [NNX10AG30G]
FX We are grateful to Jeff Valenti, Ronald L. Gilliland, Christopher M.
   Johns-Krull, and Ed Nelan for their participation on the observation
   proposal, and for a careful reading of the paper. We thank Adam Burrows
   for providing us with a hot-Jupiter spectrum model. We thank an
   anonymous referee for comments that significantly improved the
   manuscript. Financial support for this work was provided through program
   HST GO-11228 from STScI and the NASA Origins of Solar Systems grant
   NNX10AG30G.
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PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD DEC 10
PY 2012
VL 761
IS 1
AR 7
DI 10.1088/0004-637X/761/1/7
PG 13
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 046ER
UT WOS:000311748800007
ER

PT J
AU Dorodnitsyn, A
   Kallman, T
AF Dorodnitsyn, A.
   Kallman, T.
TI ACTIVE GALACTIC NUCLEUS OBSCURATION FROM WINDS: FROM DUSTY
   INFRARED-DRIVEN TO WARM AND X-RAY PHOTOIONIZED
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE acceleration of particles; galaxies: active; hydrodynamics; methods:
   numerical
ID SEYFERT-GALAXIES; ENERGY-DISTRIBUTIONS; RADIATIVE-TRANSFER; OBSCURING
   TORUS; AGN; MASS; GAS; SPECTROPOLARIMETRY; ACCELERATION; NGC-1068
AB We present calculations of active galactic nucleus winds at similar to parsec scales along with the associated obscuration. We take into account the pressure of infrared radiation on dust grains and the interaction of X-rays from a central black hole with hot and cold plasma. Infrared radiation (IR) is incorporated in radiation-hydrodynamic simulations adopting the flux-limited diffusion approximation. We find that in the range of X-ray luminosities L = 0.05-0.6 L-Edd, the Compton-thick part of the flow (aka torus) has an opening angle of approximately 72 degrees-75 degrees regardless of the luminosity. At L greater than or similar to 0.1, the outflowing dusty wind provides the obscuration with IR pressure playing a major role. The global flow consists of two phases: the cold flow at inclinations theta greater than or similar to 70 degrees and a hot, ionized wind of lower density at lower inclinations. The dynamical pressure of the hot wind is important in shaping the denser IR-supported flow. At luminosities <= 0.1 L-Edd episodes of outflow are followed by extended periods when the wind switches to slow accretion.
C1 [Dorodnitsyn, A.; Kallman, T.] NASA, High Energy Astrophys Lab, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
   [Dorodnitsyn, A.] Univ Maryland, Dept Astron, CRESST, College Pk, MD 20742 USA.
RP Dorodnitsyn, A (reprint author), NASA, High Energy Astrophys Lab, Goddard Space Flight Ctr, Code 662, Greenbelt, MD 20771 USA.
FU NASA [10-ATP10-0171]; Russian Foundation for Basic Research (RFBR)
   [11-02-00602]; NASA Goddard Space Flight Center
FX This research was supported by an appointment at the NASA Goddard Space
   Flight Center, administered by CRESST/UMD through a contract with NASA,
   and by grants from the NASA Astrophysics Theory Program 10-ATP10-0171.
   G. S. Bisnovatyi-Kogan acknowledges the support from the Russian
   Foundation for Basic Research (RFBR Grant 11-02-00602).
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PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD DEC 10
PY 2012
VL 761
IS 1
AR 70
DI 10.1088/0004-637X/761/1/70
PG 12
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 046ER
UT WOS:000311748800070
ER

PT J
AU Dudik, J
   Aulanier, G
   Schmieder, B
   Zapior, M
   Heinzel, P
AF Dudik, J.
   Aulanier, G.
   Schmieder, B.
   Zapior, M.
   Heinzel, P.
TI MAGNETIC TOPOLOGY OF BUBBLES IN QUIESCENT PROMINENCES
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE Sun: corona; Sun: filaments, prominences; Sun: magnetic topology; Sun:
   surface magnetism; Sun: UV radiation
ID CONFIGURATIONS SUPPORTING PROMINENCES; QUASI-SEPARATRIX LAYERS; TWISTED
   FLUX ROPE; SOLAR-CYCLE 23; H-ALPHA; FILAMENT CHANNEL; FINE-STRUCTURE;
   ACTIVE-REGION; LATERAL FEET; EUV FILAMENT
AB We study a polar-crown prominence with a bubble and its plume observed in several coronal filters by the SDO/AIA and in Ha by the MSDP spectrograph in Bialkow (Poland) to address the following questions: what is the brightness of prominence bubbles in EUV with respect to the corona outside of the prominence and the prominence coronal cavity? What is the geometry and topology of the magnetic field in the bubble? What is the nature of the vertical threads seen within prominences? We find that the brightness of the bubble and plume is lower than the brightness of the corona outside of the prominence, and is similar to that of the coronal cavity. We constructed linear force-free models of prominences with bubbles, where the flux rope is perturbed by inclusion of parasitic bipoles. The arcade field lines of the bipole create the bubble, which is thus devoid of magnetic dips. Shearing the bipole or adding a second one can lead to cusp-shaped prominences with bubbles similar to the observed ones. The bubbles have complex magnetic topology, with a pair of coronal magnetic null points linked by a separator outlining the boundary between the bubble and the prominence body. We conjecture that plume formation involves magnetic reconnection at the separator. Depending on the viewing angle, the prominence can appear either anvil-shaped with predominantly horizontal structures, or cusp-shaped with predominantly vertical structuring. The latter is an artifact of the alignment of magnetic dips with respect to the prominence axis and the line of sight.
C1 [Dudik, J.] Comenius Univ, Fac Math Phys & Comp Sci, DAPEM, Bratislava 84248, Slovakia.
   [Dudik, J.; Aulanier, G.; Schmieder, B.] Observ Paris, CNRS, LESIA, UMR 8109, F-92195 Meudon, France.
   [Zapior, M.] Univ Wroclaw, Astron Inst, PL-51622 Wroclaw, Poland.
   [Dudik, J.; Heinzel, P.] Acad Sci Czech Republic, Inst Astron, CS-25165 Ondrejov, Czech Republic.
RP Dudik, J (reprint author), NASA, George C Marshall Space Flight Ctr, VP-62, Huntsville, AL 35812 USA.
EM dudik@fmph.uniba.sk
RI Dudik, Jaroslav/D-5876-2013; Heinzel, Petr/G-9014-2014; 
OI Zapior, Maciej/0000-0001-9378-7487
FU Scientific Grant Agency, VEGA, Slovakia [1/0240/11]; Grant Agency of the
   Czech Republic [P209/12/1652]; Comenius University [UK/11/2012]; NASA;
   Austrian Academy of Sciences;  [RVO:67985815]
FX The authors are grateful to M. Barta, P. Demoulin, S. Gunar,and E.
   Pariat for fruitful discussions. This work was supported by Scientific
   Grant Agency, VEGA, Slovakia, grant No. 1/0240/11, Grant Agency of the
   Czech Republic, grant No. P209/12/1652, and the project RVO:67985815.
   J.D. acknowledges support from the Comenius University grant No.
   UK/11/2012 and is also very grateful to the Paris Observatory for the
   provided hospitality. Part of the work was funded by NASA's Postdoctoral
   Program. J.D. thanks the NPP host facility, Marshall Space Flight
   Center, and the Oak Ridge Associated Universities. The authors
   acknowledge the use of data from the Kanzelhohe Observatory, supported
   by the Austrian Academy of Sciences. Atmospheric Imaging Assembly (AIA)
   data are courtesy of the NASA/SDO and the AIA science team.
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PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD DEC 10
PY 2012
VL 761
IS 1
AR 9
DI 10.1088/0004-637X/761/1/9
PG 13
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 046ER
UT WOS:000311748800009
ER

PT J
AU Johnson, BC
   Lisse, CM
   Chen, CH
   Melosh, HJ
   Wyatt, MC
   Thebault, P
   Henning, WG
   Gaidos, E
   Elkins-Tanton, LT
   Bridges, JC
   Morlok, A
AF Johnson, B. C.
   Lisse, C. M.
   Chen, C. H.
   Melosh, H. J.
   Wyatt, M. C.
   Thebault, P.
   Henning, W. G.
   Gaidos, E.
   Elkins-Tanton, L. T.
   Bridges, J. C.
   Morlok, A.
TI A SELF-CONSISTENT MODEL OF THE CIRCUMSTELLAR DEBRIS CREATED BY A GIANT
   HYPERVELOCITY IMPACT IN THE HD 172555 SYSTEM
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE astrochemistry; infrared: stars; planetary systems; planets and
   satellites: formation; radiation mechanisms: thermal; techniques:
   spectroscopic
ID TERRESTRIAL PLANET FORMATION; SUN-LIKE STARS; SOLAR-SYSTEM; HEAVY
   BOMBARDMENT; ETA-CORVI; DUST; SPITZER; DISKS; GAS; MASS
AB Spectral modeling of the large infrared excess in the Spitzer IRS spectra of HD 172555 suggests that there is more than 10(19) kg of submicron dust in the system. Using physical arguments and constraints from observations, we rule out the possibility of the infrared excess being created by a magma ocean planet or a circumplanetary disk or torus. We show that the infrared excess is consistent with a circumstellar debris disk or torus, located at similar to 6 AU, that was created by a planetary scale hypervelocity impact. We find that radiation pressure should remove submicron dust from the debris disk in less than one year. However, the system's mid-infrared photometric flux, dominated by submicron grains, has been stable within 4% over the last 27 years, from the Infrared Astronomical Satellite (1983) to WISE (2010). Our new spectral modeling work and calculations of the radiation pressure on fine dust in HD 172555 provide a self-consistent explanation for this apparent contradiction. We also explore the unconfirmed claim that similar to 10(47) molecules of SiO vapor are needed to explain an emission feature at similar to 8 mu m in the Spitzer IRS spectrum of HD 172555. We find that unless there are similar to 10(48) atoms or 0.05 M-circle plus of atomic Si and O vapor in the system, SiO vapor should be destroyed by photo-dissociation in less than 0.2 years. We argue that a second plausible explanation for the similar to 8 mu m feature can be emission from solid SiO, which naturally occurs in submicron silicate "smokes" created by quickly condensing vaporized silicate.
C1 [Johnson, B. C.; Melosh, H. J.] Purdue Univ, Dept Phys, W Lafayette, IN 47907 USA.
   [Lisse, C. M.] JHU APL, Laurel, MD 20723 USA.
   [Chen, C. H.] STScI, Baltimore, MD 21218 USA.
   [Melosh, H. J.] Purdue Univ, Dept Earth Atmospher & Planetary Sci, W Lafayette, IN 47907 USA.
   [Wyatt, M. C.] Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England.
   [Thebault, P.] Observ Paris, LESIA, F-92195 Meudon, France.
   [Henning, W. G.] NASA Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
   [Gaidos, E.] Univ Hawaii Manoa, Dept Geol & Geophys, Honolulu, HI 96822 USA.
   [Elkins-Tanton, L. T.] Carnegie Inst Sci, Dept Terr Magnetism, Washington, DC 20015 USA.
   [Bridges, J. C.] Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England.
   [Morlok, A.] Open Univ, Dept Phys Sci, Milton Keynes MK7 6AA, Bucks, England.
RP Johnson, BC (reprint author), Purdue Univ, Dept Phys, 525 NW Ave, W Lafayette, IN 47907 USA.
EM johns477@purdue.edu
RI Elkins-Tanton, Linda/C-5508-2008; Lisse, Carey/B-7772-2016; 
OI Elkins-Tanton, Linda/0000-0003-4008-1098; Lisse,
   Carey/0000-0002-9548-1526; Johnson, Brandon/0000-0002-4267-093X
FU NASA PGG grant [NNX10AU88G]
FX This research was supported by NASA PGG grant NNX10AU88G. We also thank
   the anonymous referee for useful comments.
NR 57
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PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD DEC 10
PY 2012
VL 761
IS 1
AR 45
DI 10.1088/0004-637X/761/1/45
PG 13
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 046ER
UT WOS:000311748800045
ER

PT J
AU Mroczkowski, T
   Dicker, S
   Sayers, J
   Reese, ED
   Mason, B
   Czakon, N
   Romero, C
   Young, A
   Devlin, M
   Golwala, S
   Korngut, P
   Sarazin, C
   Bock, J
   Koch, PM
   Lin, KY
   Molnar, SM
   Pierpaoli, E
   Umetsu, K
   Zemcov, M
AF Mroczkowski, Tony
   Dicker, Simon
   Sayers, Jack
   Reese, Erik D.
   Mason, Brian
   Czakon, Nicole
   Romero, Charles
   Young, Alexander
   Devlin, Mark
   Golwala, Sunil
   Korngut, Phillip
   Sarazin, Craig
   Bock, James
   Koch, Patrick M.
   Lin, Kai-Yang
   Molnar, Sandor M.
   Pierpaoli, Elena
   Umetsu, Keiichi
   Zemcov, Michael
TI A MULTI-WAVELENGTH STUDY OF THE SUNYAEV-ZEL'DOVICH EFFECT IN THE
   TRIPLE-MERGER CLUSTER MACS J0717.5+3745 WITH MUSTANG AND BOLOCAM
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE cosmic background radiation; cosmology: observations; X-rays: galaxies:
   clusters; X-rays: general
ID OBSERVATIONS COSMOLOGICAL INTERPRETATION; GALAXY CLUSTERS; X-RAY;
   RELATIVISTIC CORRECTIONS; RADIO-SOURCES; SHOCK FRONTS; SKY SURVEY; 2
   DISTANT; 148 GHZ; TELESCOPE
AB We present 90, 140, and 268 GHz subarcminute resolution imaging of the Sunyaev-Zel'dovich effect (SZE) in the disturbed, intermediate-redshift (z = 0.5458) galaxy cluster MACS J0717.5+3745, a triple-merger system comprising four distinct, optically detected subclusters. Our 90 GHz SZE data result in a sensitive, 34 mu Jy beam(-1) map of the SZE at 13 '' effective resolution using the MUSTANG bolometer array on the Green Bank Telescope (GBT). Our 140 and 268 GHz SZE imaging, with resolutions of 58 '' and 31 '' and sensitivities of 1.8 and 3.3mJy beam(-1), respectively, was obtained through observations from the Caltech Submillimeter Observatory using Bolocam. We compare these maps to a two-dimensional pressure map derived from Chandra X-ray observations. Our MUSTANG SZE data confirm previous indications from Chandra of a pressure enhancement due to shock-heated, greater than or similar to 20 keV gas immediately adjacent to extended radio emission seen in low-frequency radio maps of this cluster. MUSTANG also detects pressure substructure that is not well constrained by the Chandra X-ray data in the remnant core of a merging subcluster. We find that the small-scale pressure enhancements in the MUSTANG data amount to similar to 2% of the total pressure measured in the 140 GHz Bolocam observations. The X-ray inferred pseudo-pressure template also fails on larger scales to accurately describe the Bolocam data, particularly at the location of the subcluster with a remnant core known to have a high line-of-sight optical velocity of similar to 3200 km s(-1). Our Bolocam data are adequately described when we add an additional component-not described by a thermal SZE spectrum-to the X-ray template coincident with this subcluster. Using flux densities extracted from our model fits, and marginalizing over the X-ray spectroscopic temperature constraints for the region, we fit a thermal +kinetic SZE spectrum to our Bolocam data and find that the subcluster has a best-fit line-of-sight proper velocity v(z) = 3600(-2160)(+3440) km s(-1), in agreement with the optical velocity estimates for the subcluster. The probability v(z) similar to 0 given our measurements is 2.1%. Repeating this analysis using flux densities measured directly from our maps results in a 3.4% probability v(z) <= 0. We note that this tantalizing result for the kinetic SZE is on resolved, subcluster scales.
C1 [Mroczkowski, Tony; Korngut, Phillip; Bock, James; Zemcov, Michael] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
   [Mroczkowski, Tony; Sayers, Jack; Czakon, Nicole; Golwala, Sunil; Korngut, Phillip; Bock, James; Zemcov, Michael] CALTECH, Pasadena, CA 91125 USA.
   [Dicker, Simon; Reese, Erik D.; Young, Alexander; Devlin, Mark] Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA.
   [Mason, Brian; Romero, Charles] Natl Radio Astron Observ, Charlottesville, VA 22903 USA.
   [Romero, Charles; Sarazin, Craig] Univ Virginia, Dept Astron, Charlottesville, VA 22901 USA.
   [Koch, Patrick M.; Lin, Kai-Yang; Umetsu, Keiichi] Acad Sinica, Inst Astron & Astrophys, Taipei 10617, Taiwan.
   [Molnar, Sandor M.] Natl Taiwan Univ, Leung Ctr Cosmol & Particle Astrophys, Taipei 10617, Taiwan.
   [Pierpaoli, Elena] Univ So Calif, Dept Phys & Astron, Los Angeles, CA 90089 USA.
RP Mroczkowski, T (reprint author), CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
EM tonym@astro.caltech.edu
OI Mroczkowski, Tony/0000-0003-3816-5372; Umetsu,
   Keiichi/0000-0002-7196-4822; Pierpaoli, Elena/0000-0002-7957-8993
FU CSO day crew; National Science Foundation (NSF) [AST-1007905]; NASA
   [PF0-110077]; National Radio Astronomy Observatory (NRAO) graduate
   student support program; NASA Postdoctoral Program (NPP); NASA Graduate
   Student Research Fellowship; Academia Sinica Career Development Award;
   National Science Council of Taiwan [NSC100-2112-M-001-008-MY3]; 
   [NSF/AST-0838261];  [NASA/NNX11AB07G]
FX We are grateful for CSO administrative support from Kathy Deniston,
   Barbara Wertz, and Diana Bisel, and for Bolocam instrument maintenance
   and support from the CSO day crew.; Much of the work presented here was
   supported by National Science Foundation (NSF) grant AST-1007905.
   Support for T. M. was provided by NASA through the Einstein Fellowship
   Program, grant PF0-110077. Support for A.Y. was provided by the National
   Radio Astronomy Observatory (NRAO) graduate student support program.
   Support for P. K. was provided by the NASA Postdoctoral Program (NPP).
   J.S. was supported by NSF/AST-0838261 and NASA/NNX11AB07G. N.C. was
   partially supported by a NASA Graduate Student Research Fellowship. K.
   U. acknowledges support from the Academia Sinica Career Development
   Award and the National Science Council of Taiwan under grant
   NSC100-2112-M-001-008-MY3.; The NRAO is a facility of the NSF operated
   under cooperative agreement by Associated Universities, Inc. The MUSTANG
   observations presented here were obtained with time on the GBT allocated
   under NRAO proposal IDs AGBT10A056 and AGBT11B001. The Bolocam data were
   acquired through observations at the CSO, which is operated by the
   California Institute of Technology under cooperative agreement with the
   NSF (AST-0838261). A portion of this research was carried out at the Jet
   Propulsion Laboratory, California Institute of Technology, under a
   contract with the National Aeronautics and Space Administration.
NR 57
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PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD DEC 10
PY 2012
VL 761
IS 1
AR 47
DI 10.1088/0004-637X/761/1/47
PG 15
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 046ER
UT WOS:000311748800047
ER

PT J
AU Song, J
   Zenteno, A
   Stalder, B
   Desai, S
   Bleem, LE
   Aird, KA
   Armstrong, R
   Ashby, MLN
   Bayliss, M
   Bazin, G
   Benson, BA
   Bertin, E
   Brodwin, M
   Carlstrom, JE
   Chang, CL
   Cho, HM
   Clocchiatti, A
   Crawford, TM
   Crites, AT
   de Haan, T
   Dobbs, MA
   Dudley, JP
   Foley, RJ
   George, EM
   Gettings, D
   Gladders, MD
   Gonzalez, AH
   Halverson, NW
   Harrington, NL
   High, FW
   Holder, GP
   Holzapfel, WL
   Hoover, S
   Hrubes, JD
   Joy, M
   Keisler, R
   Knox, L
   Lee, AT
   Leitch, EM
   Liu, J
   Lueker, M
   Luong-Van, D
   Marrone, DP
   McDonald, M
   McMahon, JJ
   Mehl, J
   Meyer, SS
   Mocanu, L
   Mohr, JJ
   Montroy, TE
   Natoli, T
   Nurgaliev, D
   Padin, S
   Plagge, T
   Pryke, C
   Reichardt, CL
   Rest, A
   Ruel, J
   Ruhl, JE
   Saliwanchik, BR
   Saro, A
   Sayre, JT
   Schaffer, KK
   Shaw, L
   Shirokoff, E
   Suhada, R
   Spieler, HG
   Stanford, SA
   Staniszewski, Z
   Stark, AA
   Story, K
   Stubbs, CW
   van Engelen, A
   Vanderlinde, K
   Vieira, JD
   Williamson, R
   Zahn, O
AF Song, J.
   Zenteno, A.
   Stalder, B.
   Desai, S.
   Bleem, L. E.
   Aird, K. A.
   Armstrong, R.
   Ashby, M. L. N.
   Bayliss, M.
   Bazin, G.
   Benson, B. A.
   Bertin, E.
   Brodwin, M.
   Carlstrom, J. E.
   Chang, C. L.
   Cho, H. M.
   Clocchiatti, A.
   Crawford, T. M.
   Crites, A. T.
   de Haan, T.
   Dobbs, M. A.
   Dudley, J. P.
   Foley, R. J.
   George, E. M.
   Gettings, D.
   Gladders, M. D.
   Gonzalez, A. H.
   Halverson, N. W.
   Harrington, N. L.
   High, F. W.
   Holder, G. P.
   Holzapfel, W. L.
   Hoover, S.
   Hrubes, J. D.
   Joy, M.
   Keisler, R.
   Knox, L.
   Lee, A. T.
   Leitch, E. M.
   Liu, J.
   Lueker, M.
   Luong-Van, D.
   Marrone, D. P.
   McDonald, M.
   McMahon, J. J.
   Mehl, J.
   Meyer, S. S.
   Mocanu, L.
   Mohr, J. J.
   Montroy, T. E.
   Natoli, T.
   Nurgaliev, D.
   Padin, S.
   Plagge, T.
   Pryke, C.
   Reichardt, C. L.
   Rest, A.
   Ruel, J.
   Ruhl, J. E.
   Saliwanchik, B. R.
   Saro, A.
   Sayre, J. T.
   Schaffer, K. K.
   Shaw, L.
   Shirokoff, E.
   Suhada, R.
   Spieler, H. G.
   Stanford, S. A.
   Staniszewski, Z.
   Stark, A. A.
   Story, K.
   Stubbs, C. W.
   van Engelen, A.
   Vanderlinde, K.
   Vieira, J. D.
   Williamson, R.
   Zahn, O.
TI REDSHIFTS, SAMPLE PURITY, AND BCG POSITIONS FOR THE GALAXY CLUSTER
   CATALOG FROM THE FIRST 720 SQUARE DEGREES OF THE SOUTH POLE TELESCOPE
   SURVEY
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE cosmology: observations; galaxies: clusters: general; galaxies:
   distances and redshifts
ID WIDE-FIELD SURVEY; COLOR-MAGNITUDE RELATION; SPITZER-SPACE-TELESCOPE;
   BLANCO COSMOLOGY SURVEY; GREATER-THAN 1; X-RAY; BRIGHTEST CLUSTER;
   RED-SEQUENCE; DARK ENERGY; PHOTOMETRIC REDSHIFTS
AB We present the results of the ground-and space-based optical and near-infrared (NIR) follow-up of 224 galaxy cluster candidates detected with the Sunyaev-Zel'dovich (SZ) effect in the 720 deg(2) of the South Pole Telescope (SPT) survey completed in the 2008 and 2009 observing seasons. We use the optical/NIR data to establish whether each candidate is associated with an overdensity of galaxies and to estimate the cluster redshift. Most photometric redshifts are derived through a combination of three different cluster redshift estimators using red-sequence galaxies, resulting in an accuracy of Delta z/(1 + z) = 0.017, determined through comparison with a subsample of 57 clusters for which we have spectroscopic redshifts. We successfully measure redshifts for 158 systems and present redshift lower limits for the remaining candidates. The redshift distribution of the confirmed clusters extends to z = 1.35 with a median of z(med) = 0.57. Approximately 18% of the sample with measured redshifts lies at z > 0.8. We estimate a lower limit to the purity of this SPT SZ-selected sample by assuming that all unconfirmed clusters are noise fluctuations in the SPT data. We show that the cumulative purity at detection significance xi > 5(xi > 4.5) is >= 95% (>= 70%). We present the red brightest cluster galaxy (rBCG) positions for the sample and examine the offsets between the SPT candidate position and the rBCG. The radial distribution of offsets is similar to that seen in X-ray-selected cluster samples, providing no evidence that SZ-selected cluster samples include a different fraction of recent mergers from X-ray-selected cluster samples.
C1 [Song, J.; McMahon, J. J.] Univ Michigan, Dept Phys, Ann Arbor, MI 48109 USA.
   [Zenteno, A.; Desai, S.; Bazin, G.; Liu, J.; Mohr, J. J.; Saro, A.; Suhada, R.] Univ Munich, Dept Phys, D-81679 Munich, Germany.
   [Zenteno, A.; Desai, S.; Bazin, G.; Liu, J.; Mohr, J. J.] Excellence Cluster Universe, D-85748 Garching, Germany.
   [Stalder, B.; Ashby, M. L. N.; Bayliss, M.; Foley, R. J.; Stark, A. A.; Stubbs, C. W.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
   [Bleem, L. E.; Benson, B. A.; Carlstrom, J. E.; Chang, C. L.; Crawford, T. M.; Crites, A. T.; Gladders, M. D.; High, F. W.; Hoover, S.; Keisler, R.; Leitch, E. M.; Mehl, J.; Meyer, S. S.; Mocanu, L.; Natoli, T.; Padin, S.; Plagge, T.; Schaffer, K. K.; Story, K.; Vieira, J. D.; Williamson, R.] Univ Chicago, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA.
   [Bleem, L. E.; Aird, K. A.; Carlstrom, J. E.; Hrubes, J. D.; Keisler, R.; Luong-Van, D.; Meyer, S. S.; Natoli, T.; Story, K.; Vieira, J. D.] Univ Chicago, Dept Phys, Chicago, IL 60637 USA.
   [Armstrong, R.] Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA.
   [Bayliss, M.; Nurgaliev, D.; Ruel, J.; Stubbs, C. W.] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA.
   [Benson, B. A.; Carlstrom, J. E.; Chang, C. L.; Hoover, S.; Meyer, S. S.; Schaffer, K. K.] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA.
   [Bertin, E.] Univ Paris 06, CNRS, UMR 7095, Inst Astrophys Paris, F-75014 Paris, France.
   [Brodwin, M.] Univ Missouri, Dept Phys & Astron, Kansas City, MO 64110 USA.
   [Carlstrom, J. E.; Crawford, T. M.; Crites, A. T.; Gladders, M. D.; High, F. W.; Leitch, E. M.; Mehl, J.; Meyer, S. S.; Mocanu, L.; Padin, S.; Plagge, T.; Williamson, R.] Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA.
   [Carlstrom, J. E.; Chang, C. L.] Argonne Natl Lab, Argonne, IL 60439 USA.
   [Cho, H. M.] NIST, Quantum Devices Grp, Boulder, CO 80305 USA.
   [Clocchiatti, A.] Pontificia Univ Catolica Chile, Dept Astron & Astrosif, Santiago, Chile.
   [de Haan, T.; Dobbs, M. A.; Dudley, J. P.; Holder, G. P.; Shaw, L.; van Engelen, A.; Vanderlinde, K.] McGill Univ, Dept Phys, Montreal, PQ H3A 2T8, Canada.
   [George, E. M.; Harrington, N. L.; Holzapfel, W. L.; Lee, A. T.; Lueker, M.; Reichardt, C. L.; Shirokoff, E.; Zahn, O.] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA.
   [Gettings, D.; Gonzalez, A. H.] Univ Florida, Dept Astron, Gainesville, FL 32611 USA.
   [Halverson, N. W.] Univ Colorado, Dept Astrophys & Planetary Sci, Boulder, CO 80309 USA.
   [Halverson, N. W.] Univ Colorado, Dept Phys, Boulder, CO 80309 USA.
   [Joy, M.] NASA, George C Marshall Space Flight Ctr, Dept Space Sci, Huntsville, AL 35812 USA.
   [Knox, L.; Stanford, S. A.] Univ Calif Davis, Dept Phys, Davis, CA 95616 USA.
   [Lee, A. T.; Spieler, H. G.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Div Phys, Berkeley, CA 94720 USA.
   [Lueker, M.; Padin, S.; Shirokoff, E.; Vieira, J. D.] CALTECH, Dept Astron, Pasadena, CA 91125 USA.
   [Marrone, D. P.] Univ Arizona, Steward Observ, Tucson, AZ 85721 USA.
   [McDonald, M.] MIT, Kavli Inst Astrophys & Space Res, Cambridge, MA 02139 USA.
   [Mohr, J. J.] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany.
   [Montroy, T. E.; Ruhl, J. E.; Saliwanchik, B. R.; Sayre, J. T.; Staniszewski, Z.] Case Western Reserve Univ, Dept Phys, Ctr Educ & Res Cosmol & Astrophys, Cleveland, OH 44106 USA.
   [Pryke, C.] Univ Minnesota, Dept Phys, Minneapolis, MN 55455 USA.
   [Rest, A.] Space Telescope Sci Inst, Baltimore, MD 21218 USA.
   [Schaffer, K. K.] Sch Art Inst Chicago, Liberal Arts Dept, Chicago, IL 60603 USA.
   [Shaw, L.] Yale Univ, Dept Phys, New Haven, CT 06520 USA.
   [Stanford, S. A.] Lawrence Livermore Natl Lab, Inst Geophys & Planetary Phys, Livermore, CA 94551 USA.
   [Zahn, O.] Univ Calif Berkeley, Dept Phys, Berkeley Ctr Cosmol Phys, Berkeley, CA 94720 USA.
   [Zahn, O.] Lawrence Berkeley Natl Labs, Berkeley, CA 94720 USA.
RP Song, J (reprint author), Univ Michigan, Dept Phys, 450 Church St, Ann Arbor, MI 48109 USA.
RI Williamson, Ross/H-1734-2015; Holzapfel, William/I-4836-2015; Stubbs,
   Christopher/C-2829-2012; 
OI Williamson, Ross/0000-0002-6945-2975; Stubbs,
   Christopher/0000-0003-0347-1724; Marrone, Daniel/0000-0002-2367-1080;
   Aird, Kenneth/0000-0003-1441-9518; Reichardt,
   Christian/0000-0003-2226-9169; Stark, Antony/0000-0002-2718-9996
FU National Science Foundation [ANT-0638937]; NSF Physics Frontier Center
   [PHY-0114422]; Kavli Foundation; Gordon and Betty Moore Foundation;
   Excellence Cluster Universe; DFG [TR33 The Dark Universe]; NSF
   [AST-1009012, AST-1009649, MRI-0723073]; National Sciences and
   Engineering Research Council of Canada; Canada Research Chairs program;
   Canadian Institute for Advanced Research; NASA; U.S. Government
   [NAGW-2166]
FX The South Pole Telescope program is supported by the National Science
   Foundation through grant ANT-0638937. Partial support is also provided
   by the NSF Physics Frontier Center grant PHY-0114422 to the Kavli
   Institute of Cosmological Physics at the University of Chicago, the
   Kavli Foundation, and the Gordon and Betty Moore Foundation. The Munich
   group acknowledges support from the Excellence Cluster Universe and the
   DFG research program TR33 The Dark Universe. Galaxy cluster research at
   Harvard is supported by NSF grant AST-1009012, and research at SAO is
   supported in part by NSF grants AST-1009649 and MRI-0723073. The McGill
   group acknowledges funding from the National Sciences and Engineering
   Research Council of Canada, Canada Research Chairs program, and the
   Canadian Institute for Advanced Research.; Optical imaging data from the
   Blanco 4 m at Cerro Tololo Interamerican Observatories (programs
   2005B-0043, 2009B-0400, 2010A-0441, 2010B-0598) and spectroscopic
   observations from VLT programs 086. A-0741 and 286. A-5021 and Gemini
   program GS-2009B-Q-16 were included in this work. Additional data were
   obtained with the 6.5 m Magellan Telescopes and the Swope telescope,
   which are located at the Las Campanas Observatory in Chile. This work is
   based in part on observations made with the Spitzer Space Telescope
   (PIDs 60099, 70053), which is operated by the Jet Propulsion Laboratory,
   California Institute of Technology, under a contract with NASA. Support
   for this work was provided by NASA through an award issued by
   JPL/Caltech. The Digitized Sky Surveys were produced at the Space
   Telescope Science Institute under U.S. Government grant NAGW-2166. The
   images of these surveys are based on photographic data obtained using
   the Oschin Schmidt Telescope on Palomar Mountain and the UK Schmidt
   Telescope. The plates were processed into the present compressed digital
   form with the permission of these institutions.
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PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-637X
J9 ASTROPHYS J
JI Astrophys. J.
PD DEC 10
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ER

PT J
AU Sterling, AC
   Moore, RL
   Hara, H
AF Sterling, Alphonse C.
   Moore, Ronald L.
   Hara, Hirohisa
TI OBSERVATIONS FROM SDO, HINODE, AND STEREO OF A TWISTING AND WRITHING
   START TO A SOLAR-FILAMENT-ERUPTION CASCADE
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE Sun: coronal mass ejections (CMEs); Sun: filaments, prominences; Sun:
   flares; Sun: UV radiation
ID CORONAL MASS EJECTIONS; ACTIVE-REGION FILAMENTS; FLUX ROPE FORMATION;
   2005 SEPTEMBER 13; X-RAY TELESCOPE; KINK INSTABILITY; IMAGING
   SPECTROMETER; MAGNETIC-FLUX; EMISSION-LINES; SLOW-RISE
AB We analyze data from SDO (AIA, HMI), Hinode (SOT, XRT, EIS), and STEREO (EUVI) of a solar eruption sequence of 2011 June 1 near 16: 00 UT, with an emphasis on the early evolution toward eruption. Ultimately, the sequence consisted of three emission bursts and two filament ejections. SDO/AIA 304 angstrom images show absorbing-material strands initially in close proximity which over similar to 20 minutes form a twisted structure, presumably a flux rope with similar to 10(29) erg of free energy that triggers the resulting evolution. A jump in the filament/flux rope's displacement (average velocity similar to 20 km s(-1)) and the first burst of emission accompanies the flux-rope formation. After similar to 20 more minutes, the flux rope/filament kinks and writhes, followed by a semi-steady state where the flux rope/filament rises at (similar to 5 km s(-1)) for similar to 10 minutes. Then the writhed flux rope/filament again becomes MHD unstable and violently erupts, along with rapid (50 km s(-1)) ejection of the filament and the second burst of emission. That ejection removed a field that had been restraining a second filament, which subsequently erupts as the second filament ejection accompanied by the third (final) burst of emission. Magnetograms from SDO/HMI and Hinode/SOT, and other data, reveal several possible causes for initiating the flux-rope-building reconnection, but we are not able to say which is dominant. Our observations are consistent with magnetic reconnection initiating the first burst and the flux-rope formation, with MHD processes initiating the further dynamics. Both filament ejections are consistent with the standard model for solar eruptions.
C1 [Sterling, Alphonse C.; Moore, Ronald L.] NASA, Space Sci Off, George C Marshall Space Flight Ctr, Huntsville, AL 35812 USA.
   [Hara, Hirohisa] Natl Inst Nat Sci, Natl Astron Observ Japan, Mitaka, Tokyo 1818588, Japan.
RP Sterling, AC (reprint author), JAXA Inst Space & Astronaut Sci, Hinode Grp, Chuo Ku, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 2525210, Japan.
EM alphonse.sterling@nasa.gov; ron.moore@nasa.gov; hirohisa.hara@nao.ac.jp
FU NASA's Office of Space Science; JAXA; NAOJ (Japan); STFC (U.K.); NASA
   (U.S.A.); ESA; NSC (Norway)
FX A.C.S. and R. L. M. were supported by funding from NASA's Office of
   Space Science through the Solar Physics Supporting Research and
   Technology Program, the Heliophysics Guest Investigator Program, and the
   Living With a Star Targeted Research & Technology Program. We thank D.
   H. Brooks for useful discussions regarding EIS data analysis. Hinode is
   a Japanese mission developed and launched by ISAS/JAXA, collaborating
   with NAOJ as a domestic partner, NASA and STFC (UK) as international
   partners. Scientific operation of the Hinode mission is conducted by the
   Hinode science team organized at ISAS/JAXA. This team mainly consists of
   scientists from institutes in the partner countries. Support for the
   post-launch operation is provided by JAXA and NAOJ (Japan), STFC (U.K.),
   NASA (U.S.A.), ESA, and NSC (Norway).
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SN 0004-637X
EI 1538-4357
J9 ASTROPHYS J
JI Astrophys. J.
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PT J
AU Troja, E
   Sakamoto, T
   Guidorzi, C
   Norris, JP
   Panaitescu, A
   Kobayashi, S
   Omodei, N
   Brown, JC
   Burrows, DN
   Evans, PA
   Gehrels, N
   Marshall, FE
   Mawson, N
   Melandri, A
   Mundell, CG
   Oates, SR
   Pal'shin, V
   Preece, RD
   Racusin, JL
   Steele, IA
   Tanvir, NR
   Vasileiou, V
   Wilson-Hodge, C
   Yamaoka, K
AF Troja, E.
   Sakamoto, T.
   Guidorzi, C.
   Norris, J. P.
   Panaitescu, A.
   Kobayashi, S.
   Omodei, N.
   Brown, J. C.
   Burrows, D. N.
   Evans, P. A.
   Gehrels, N.
   Marshall, F. E.
   Mawson, N.
   Melandri, A.
   Mundell, C. G.
   Oates, S. R.
   Pal'shin, V.
   Preece, R. D.
   Racusin, J. L.
   Steele, I. A.
   Tanvir, N. R.
   Vasileiou, V.
   Wilson-Hodge, C.
   Yamaoka, K.
TI BROADBAND STUDY OF GRB 091127: A SUB-ENERGETIC BURST AT HIGHER REDSHIFT?
SO ASTROPHYSICAL JOURNAL
LA English
DT Article
DE gamma-ray burst: individual (GRB 091127)
ID GAMMA-RAY BURST; PARAMETER-ESTIMATION; SPECTRAL EVOLUTION; PHYSICAL
   ORIGINS; FIREBALL MODEL; LORENTZ FACTOR; MASSIVE STARS; LIGHT CURVES;
   HOST-GALAXY; EMISSION
AB GRB 091127 is a bright gamma-ray burst (GRB) detected by Swift at a redshift z = 0.49 and associated with SN 2009nz. We present the broadband analysis of the GRB prompt and afterglow emission and study its high-energy properties in the context of the GRB/SN association. While the high luminosity of the prompt emission and standard afterglow behavior are typical of cosmological long GRBs, its low-energy release (E-gamma < 3 x 10(49) erg), soft spectrum, and unusual spectral lag connect this GRB to the class of sub-energetic bursts. We discuss the suppression of high-energy emission in this burst, and investigate whether this behavior could be connected with the sub-energetic nature of the explosion.
C1 [Troja, E.; Sakamoto, T.; Brown, J. C.; Gehrels, N.; Marshall, F. E.; Racusin, J. L.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
   [Troja, E.] Univ Maryland, Dept Astron, College Pk, MD 20742 USA.
   [Guidorzi, C.] Univ Ferrara, Dept Phys, I-44122 Ferrara, Italy.
   [Guidorzi, C.; Kobayashi, S.; Mawson, N.; Melandri, A.; Steele, I. A.] Liverpool John Moores Univ, Astrophys Res Inst, Birkenhead CH41 1LD, Merseyside, England.
   [Norris, J. P.] Boise State Univ, Dept Phys, Boise, ID 83725 USA.
   [Panaitescu, A.] Los Alamos Natl Lab, Los Alamos, NM 87545 USA.
   [Omodei, N.] Stanford Univ, WW Hansen Expt Phys Lab, Kavli Inst Particle Astrophys & Cosmol, Dept Phys, Stanford, CA 94305 USA.
   [Omodei, N.] Stanford Univ, SLAC Natl Accelerator Lab, Stanford, CA 94305 USA.
   [Burrows, D. N.] Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA.
   [Evans, P. A.; Tanvir, N. R.] Univ Leicester, Xray & Observat Astron Grp, Dept Phys & Astron, Leicester LE1 7RH, Leics, England.
   [Melandri, A.] INAF OAB, I-23807 Merate, LC, Italy.
   [Oates, S. R.] Univ Coll London, Mullard Space Sci Lab, Dorking RH5 6NT, Surrey, England.
   [Pal'shin, V.] AF Ioffe Phys Tech Inst, Expt Astrophys Lab, St Petersburg 194021, Russia.
   [Preece, R. D.] Univ Alabama, Dept Phys, Huntsville, AL 35805 USA.
   [Vasileiou, V.] Univ Montpellier 2, Lab Univers & Particules Montpellier, F-34095 Montpellier, France.
   [Wilson-Hodge, C.] Univ Innsbruck, Inst Astro & Particle Phys, A-6176 Innsbruck, Austria.
   [Yamaoka, K.] Aoyama Gakuin Univ, Dept Math & Phys, Chuo Ku, Sagamihara, Kanagawa 2525258, Japan.
RP Troja, E (reprint author), NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
RI Racusin, Judith/D-2935-2012; Pal'shin, Valentin/F-3973-2014; 
OI Preece, Robert/0000-0003-1626-7335; Omodei, Nicola/0000-0002-5448-7577
FU NASA; Russian Space Agency; RFBR [11-02-12082-ofi_m]
FX We thank T. Ukwatta, R. Starling, and R. Filgas for useful discussions
   and information. E. T. was supported by an appointment to the NASA
   Postdoctoral Program at the Goddard Space Flight Center, administered by
   Oak Ridge Associated Universities through a contract with NASA. This
   work made use of data supplied by the UK Swift Science Data Centre at
   the University of Leicester. The Konus-Wind experiment is supported by a
   Russian Space Agency contract and RFBR Grant 11-02-12082-ofi_m.
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JI Astrophys. J.
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ER

PT J
AU Jennings, DE
   Anderson, CM
   Samuelson, RE
   Flasar, FM
   Nixon, CA
   Bjoraker, GL
   Romani, PN
   Achterberg, RK
   Cottini, V
   Hesman, BE
   Kunde, VG
   Carlson, RC
   de Kok, R
   Coustenis, A
   Vinatier, S
   Bampasidis, G
   Teanby, NA
   Calcutt, SB
AF Jennings, Donald E.
   Anderson, C. M.
   Samuelson, R. E.
   Flasar, F. M.
   Nixon, C. A.
   Bjoraker, G. L.
   Romani, P. N.
   Achterberg, R. K.
   Cottini, V.
   Hesman, B. E.
   Kunde, V. G.
   Carlson, R. C.
   de Kok, R.
   Coustenis, A.
   Vinatier, S.
   Bampasidis, G.
   Teanby, N. A.
   Calcutt, S. B.
TI FIRST OBSERVATION IN THE SOUTH OF TITAN'S FAR-INFRARED 220 cm(-1) CLOUD
SO ASTROPHYSICAL JOURNAL LETTERS
LA English
DT Article
DE molecular processes; planets and satellites: atmospheres; planets and
   satellites: composition; planets and satellites: individual (Titan);
   radiation mechanisms: thermal
ID STRATOSPHERIC AEROSOLS; TEMPORAL VARIATIONS; SPECTRAL RANGE; CASSINI;
   ATMOSPHERE; WINTER; TEMPERATURES; SPECTROMETER; PROFILES; NITRILES
AB An emission feature at 220 cm(-1) which has been attributed to a cloud of condensed material in Titan's winter stratosphere has been seen for the first time in the south. This feature had previously been found only at high northern latitudes during northern winter and spring. The material emitting at 220 cm(-1), as yet unidentified, may be volatiles associated with nitrile gases that accumulate in the absence of ultraviolet sunlight. Not detected as recently as 2012 February, the 220 cm(-1) feature clearly appeared at the south pole in Cassini spectra recorded on 2012 July 24, indicating a rapid onset of the emission. This is the first indication of the winter buildup of condensation in the southern stratosphere that has been expected as the south pole moves deeper into shadow. In the north the 220 cm(-1) feature continued to decrease in intensity with a half-life of 3 years.
C1 [Jennings, Donald E.; Anderson, C. M.; Samuelson, R. E.; Flasar, F. M.; Nixon, C. A.; Bjoraker, G. L.; Romani, P. N.; Achterberg, R. K.; Cottini, V.; Hesman, B. E.; Kunde, V. G.; Carlson, R. C.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
   [Samuelson, R. E.; Achterberg, R. K.; Hesman, B. E.; Kunde, V. G.] Univ Maryland, Dept Astron, College Pk, MD 20742 USA.
   [Carlson, R. C.] Catholic Univ Amer, IACS, Washington, DC 20064 USA.
   [de Kok, R.] SRON Netherlands Inst Space Res, NL-3584 CA Utrecht, Netherlands.
   [Coustenis, A.; Vinatier, S.; Bampasidis, G.] Observ Paris, LESIA, F-92195 Meudon, France.
   [Bampasidis, G.] Univ Athens, Fac Phys, GR-15783 Athens, Greece.
   [Teanby, N. A.] Univ Bristol, Sch Earth Sci, Bristol BS8 1RJ, Avon, England.
   [Calcutt, S. B.] Univ Oxford, Dept Phys, Oxford OX1 3PU, England.
RP Jennings, DE (reprint author), NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
EM donald.e.jennings@nasa.gov
RI Nixon, Conor/A-8531-2009; Flasar, F Michael/C-8509-2012; Anderson,
   Carrie/C-8097-2012; 
OI Nixon, Conor/0000-0001-9540-9121; Calcutt, Simon/0000-0002-0102-3170;
   Teanby, Nicholas/0000-0003-3108-5775
FU NASA; UK STFC; Leverhulme Trust
FX We acknowledge support from NASA's Cassini mission, Cassini Data
   Analysis Program and Planetary Astronomy Program. V. C. was supported by
   the NASA Postdoctoral Program. N.A.T. was supported by the UK STFC and
   the Leverhulme Trust. We thank Robert West for pointing out that we
   might be seeing emission from the south polar hood.
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SN 2041-8205
J9 ASTROPHYS J LETT
JI Astrophys. J. Lett.
PD DEC 10
PY 2012
VL 761
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AR L15
DI 10.1088/2041-8205/761/1/L15
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SC Astronomy & Astrophysics
GA 051ET
UT WOS:000312108900015
ER

PT J
AU Rightmire-Upton, L
   Hathaway, DH
   Kosak, K
AF Rightmire-Upton, Lisa
   Hathaway, David H.
   Kosak, Katie
TI MEASUREMENTS OF THE SUN'S HIGH-LATITUDE MERIDIONAL CIRCULATION
SO ASTROPHYSICAL JOURNAL LETTERS
LA English
DT Article
DE Sun: dynamo; Sun: rotation; Sun: surface magnetism
ID SOLAR-CYCLE 23; TRANSPORT; FLOW
AB The meridional circulation at high latitudes is crucial to the buildup and reversal of the Sun's polar magnetic fields. Here, we characterize the axisymmetric flows by applying a magnetic feature cross-correlation procedure to high-resolution magnetograms obtained by the Helioseismic and Magnetic Imager (HMI) on board the Solar Dynamics Observatory. We focus on Carrington rotations 2096-2107 (2010 April to 2011 March)-the overlap interval between HMI and the Michelson Doppler Imager (MDI). HMI magnetograms averaged over 720 s are first mapped into heliographic coordinates. Strips from these maps are then cross-correlated to determine the distances in latitude and longitude that the magnetic element pattern has moved, thus providing meridional flow and differential rotation velocities for each rotation of the Sun. Flow velocities were averaged for the overlap interval and compared to results obtained from MDI data. This comparison indicates that these HMI images are rotated counterclockwise by 0 degrees.075 with respect to the Sun's rotation axis. The profiles indicate that HMI data can be used to reliably measure these axisymmetric flow velocities to at least within 5 degrees of the poles. Unlike the noisier MDI measurements, no evidence of a meridional flow counter-cell is seen in either hemisphere with the HMI measurements: poleward flow continues all the way to the poles. Slight north-south asymmetries are observed in the meridional flow. These asymmetries should contribute to the observed asymmetries in the polar fields and the timing of their reversals.
C1 [Rightmire-Upton, Lisa] Univ Alabama, Dept Phys, Huntsville, AL 35899 USA.
   [Hathaway, David H.] NASA, George C Marshall Space Flight Ctr, Huntsville, AL 35812 USA.
   [Kosak, Katie] Florida Inst Technol, Melbourne, FL 32901 USA.
RP Rightmire-Upton, L (reprint author), Univ Alabama, Dept Phys, Huntsville, AL 35899 USA.
EM lar0009@uah.edu; david.hathaway@nasa.gov; mkosak2011@my.fit.edu
FU NASA; University of Alabama in Huntsville; NSF [AGS-1157027]
FX Hathaway and Rightmire-Upton were supported by a grant from the NASA
   Living with a Star Program to Marshall Space Flight Center. Kosak was
   supported by a summer REU program at the University of Alabama in
   Huntsville funded by NSF Grant No. AGS-1157027. The HMI data used are
   courtesy of the NASA/SDO and the HMI science team.
NR 10
TC 13
Z9 13
U1 1
U2 5
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 2041-8205
J9 ASTROPHYS J LETT
JI Astrophys. J. Lett.
PD DEC 10
PY 2012
VL 761
IS 1
AR L14
DI 10.1088/2041-8205/761/1/L14
PG 4
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 051ET
UT WOS:000312108900014
ER

PT J
AU Dobrea, EZN
   Wray, JJ
   Calef, FJ
   Parker, TJ
   Murchie, SL
AF Dobrea, E. Z. Noe
   Wray, J. J.
   Calef, F. J., III
   Parker, T. J.
   Murchie, S. L.
TI Hydrated minerals on Endeavour Crater's rim and interior, and
   surrounding plains: New insights from CRISM data
SO GEOPHYSICAL RESEARCH LETTERS
LA English
DT Article
ID MERIDIANI-PLANUM; MAWRTH VALLIS; MARS
AB We have conducted a spectroscopic analysis of the rim and interior of Endeavour Crater using CRISM data in order to further constrain the mineralogical variability in the area and to identify targets of interest for in-situ analysis by Opportunity. Our analysis reveals that the spectral character of both the sulfates and the phyllosilicates in the area is more diverse than has been reported to date, with phyllosilicates present on the rim and interior of Endeavour crater as well as on the surrounding plains. Spectra of the sulfates adjacent to the rim and in the crater's interior mound exhibit features that are consistent with a component of Ca-sulfates. The spectral character of the phyllosilicates is consistent with that of Fe/Mg smectites, but there are clear spectral differences between the rim and interior phyllosilicates. Specifically, the phyllosilicates found inside the crater exhibit shallower, more rounded Fe/Mg-OH bands, a subtle 1.9 mu m hydration band, and a strong 1-2 mu m spectral slope relative to the phyllosilicates on the rim, suggesting that they have experienced modification relative to the rim phyllosilicates. This modification may be attributed either to alteration via acidic leaching or to dehydration. Stratigraphically, we find that these altered phyllosilicates unconformably overlie the sulfate-bearing mound material, suggesting that they were emplaced by the reworking of rim phyllosilicates after the interior mound had reached its present day form. Citation: Noe Dobrea, E. Z., J. J. Wray, F. J. Calef III, T. J. Parker, and S. L. Murchie (2012), Hydrated minerals on Endeavour Crater's rim and interior, and surrounding plains: New insights from CRISM data., Geophys. Res. Lett., 39, L23201, doi: 10.1029/2012GL053180.
C1 [Dobrea, E. Z. Noe] Planetary Sci Inst, Tucson, AZ 85719 USA.
   [Wray, J. J.] Georgia Inst Technol, Sch Earth & Atmospher Sci, Atlanta, GA 30332 USA.
   [Calef, F. J., III; Parker, T. J.] CALTECH, Jet Prop Lab, Pasadena, CA USA.
   [Murchie, S. L.] Johns Hopkins Univ, Appl Phys Lab, Laurel, MD USA.
RP Dobrea, EZN (reprint author), Planetary Sci Inst, 1700 E Ft Lowell,Ste 106, Tucson, AZ 85719 USA.
EM eldar@psi.edu
RI Wray, James/B-8457-2008; Murchie, Scott/E-8030-2015
OI Wray, James/0000-0001-5559-2179; Murchie, Scott/0000-0002-1616-8751
NR 24
TC 9
Z9 9
U1 1
U2 13
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0094-8276
EI 1944-8007
J9 GEOPHYS RES LETT
JI Geophys. Res. Lett.
PD DEC 8
PY 2012
VL 39
AR L23201
DI 10.1029/2012GL053180
PG 6
WC Geosciences, Multidisciplinary
SC Geology
GA 050ZT
UT WOS:000312094400001
ER

PT J
AU Korotova, GI
   Sibeck, DG
   Omidi, N
   Angelopoulos, V
AF Korotova, G. I.
   Sibeck, D. G.
   Omidi, N.
   Angelopoulos, V.
TI THEMIS observations of unusual bow shock motion attending a transient
   magnetospheric event
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
ID WIND DYNAMIC PRESSURE; SOLAR-WIND; MAGNETOPAUSE; DISCONTINUITIES; SHAPE;
   SPACECRAFT
AB We present a multipoint case study of solar wind and magnetospheric observations during a transient magnetospheric compression at 23:19 UT on 15 October 2008. We use high time resolution magnetic field and plasma data from the THEMIS and GOES 11/12 spacecraft to show that this transient event corresponded to an abrupt rotation in the IMF orientation, a change in the location of the foreshock, and transient outward bow shock motion. We employ results from a global hybrid code model to reconcile the observations indicating transient inward magnetopause motion with the outward bow shock motion. Citation: Korotova, G. I., D. G. Sibeck, N. Omidi, and V. Angelopoulos ( 2012), THEMIS observations of unusual bow shock motion attending a transient magnetospheric event, J. Geophys. Res., 117, A12207, doi:10.1029/2012JA017510.
C1 [Korotova, G. I.] Univ Maryland, Inst Phys Sci & Technol, College Pk, MD 20742 USA.
   [Korotova, G. I.] IZMIRAN, Troitsk 142092, Russia.
   [Sibeck, D. G.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
   [Omidi, N.] Solana Sci Inc, Solana Beach, CA USA.
   [Angelopoulos, V.] Univ Calif Los Angeles, IGPP ESS, Los Angeles, CA USA.
RP Korotova, GI (reprint author), Univ Maryland, Inst Phys Sci & Technol, College Pk, MD 20742 USA.
EM gkorotov@umd.edu
FU THEMIS project; NASA/GSFC [NNX09AV52G]
FX Work at GSFC was supported by the THEMIS project, while work by G.I.K.
   at the University of Maryland was supported by a grant from NASA/GSFC
   NNX09AV52G.
NR 39
TC 2
Z9 2
U1 0
U2 3
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-9380
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD DEC 8
PY 2012
VL 117
AR A12207
DI 10.1029/2012JA017510
PG 11
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 051EN
UT WOS:000312108200001
ER

PT J
AU Walsh, BM
   Sibeck, DG
   Wang, Y
   Fairfield, DH
AF Walsh, B. M.
   Sibeck, D. G.
   Wang, Y.
   Fairfield, D. H.
TI Dawn-dusk asymmetries in the Earth's magnetosheath
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
ID INTERPLANETARY MAGNETIC-FIELD; DAYSIDE MAGNETOPAUSE; BOW SHOCK;
   AMPTE/IRM OBSERVATIONS; GEOTAIL OBSERVATIONS; PLASMA DEPLETION; WIND;
   FLOW; SHEAR; SHAPE
AB Statistical observations by the THEMIS spacecraft show a dawn-dusk asymmetry in plasma parameters within the Earth's magnetosheath. Proton density and temperature are greater on the dawnside while the magnetic field strength and bulk flow are greater on the duskside. The asymmetry has been measured just outside the magnetopause in the dayside magnetosheath through 1114 boundary crossings from 2008 through 2010. These results are compared with modeling from the BATS-R-US global MHD code and are consistent with the expected asymmetries that would result from the interactions of the Parker spiral interplanetary magnetic field with the Earth's bow shock. Solar cycle variations are analyzed for the current and past studies to predict the influence of upstream conditions during different time periods. Citation: Walsh, B. M., D. G. Sibeck, Y. Wang, and D. H. Fairfield (2012), Dawn-dusk asymmetries in the Earth's magnetosheath, J. Geophys. Res., 117, A12211, doi:10.1029/2012JA018240.
C1 [Walsh, B. M.; Sibeck, D. G.; Wang, Y.; Fairfield, D. H.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
   [Wang, Y.] Univ Maryland Baltimore Cty, Catonsville, MD USA.
RP Walsh, BM (reprint author), NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
EM brian.m.walsh-1@nasa.gov
FU National Science Foundation [AGS-1136827]; NASA [NAS5-02099]
FX Support was given by the National Science Foundation through grant
   AGS-1136827. We acknowledge NASA contract NAS5-02099 and V. Angelopoulos
   for useful discussions and use of data from the THEMIS Mission,
   specifically: C. W. Carlson and J. P. McFadden for use of ESA data, and
   K. H. Glassmeier, U. Auster and W. Baumjohann for the use of FGM data.
   Simulation results have been provided by the Community Coordinated
   Modeling Center at Goddard Space Flight Center.
NR 40
TC 21
Z9 21
U1 1
U2 11
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0148-0227
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD DEC 8
PY 2012
VL 117
AR A12211
DI 10.1029/2012JA018240
PG 8
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 051EN
UT WOS:000312108200008
ER

PT J
AU Susskind, J
   Molnar, G
   Iredell, L
   Loeb, NG
AF Susskind, Joel
   Molnar, Gyula
   Iredell, Lena
   Loeb, Norman G.
TI Interannual variability of outgoing longwave radiation as observed by
   AIRS and CERES
SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
LA English
DT Article
ID MADDEN-JULIAN OSCILLATION; BUDGET ERB EXPERIMENT; TOVS PATHFINDER PATH;
   CLIMATE FEEDBACKS; PART II; CLOUDS; PRECIPITATION; SATELLITE; ALTITUDE;
   PACIFIC
AB The paper examines spatial anomaly time series of outgoing longwave radiation (OLR) and Clear Sky OLR (OLRCLR) as determined using observations from CERES Terra and AIRS over the time period September 2002 through June 2011. We find excellent agreement of the two OLR data sets in almost every detail down to the 1 degrees x 1 degrees spatial grid point level. The extremely close agreement of OLR anomaly time series derived from observations by two different instruments implies high stability of both sets of results. Anomalies of global mean, and especially tropical mean, OLR are shown to be strongly correlated with an El Nino Index. These correlations explain that the recent global and tropical mean decreases in OLR over the time period studied are primarily the result of a transition from an El Nino condition at the beginning of the data record to La Nina conditions toward the end of the data period. We show that the close correlation of mean OLR anomalies with the El Nino Index can be well accounted for by temporal changes of OLR within two spatial regions, one to the east of, and one to the west of, the NOAA Nino-4 region. Anomalies of OLR in these two spatial regions are both strongly correlated with the El Nino Index as a result of the strong anticorrelation of anomalies of cloud cover and midtropospheric water vapor in these two regions with the El Nino Index. Citation: Susskind, J., G. Molnar, L. Iredell, and N. G. Loeb (2012), Interannual variability of outgoing longwave radiation as observed by AIRS and CERES, J. Geophys. Res., 117, D23107, doi:10.1029/2012JD017997.
C1 [Susskind, Joel] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
   [Molnar, Gyula] Morgan State Univ, Goddard Earth Sci Technol & Res Program, Greenbelt, MD USA.
   [Iredell, Lena] Sci Applicat Int Corp, Greenbelt, MD USA.
   [Loeb, Norman G.] NASA, Langley Res Ctr, Hampton, VA 23665 USA.
RP Susskind, J (reprint author), NASA, Goddard Space Flight Ctr, Code 610, Greenbelt, MD 20771 USA.
EM Joel.susskind-1@nasa.gov
NR 46
TC 16
Z9 16
U1 2
U2 31
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-897X
J9 J GEOPHYS RES-ATMOS
JI J. Geophys. Res.-Atmos.
PD DEC 7
PY 2012
VL 117
AR D23107
DI 10.1029/2012JD017997
PG 18
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 051AT
UT WOS:000312097000003
ER

PT J
AU Anderson, BJ
   Johnson, CL
   Korth, H
   Winslow, RM
   Borovsky, JE
   Purucker, ME
   Slavin, JA
   Solomon, SC
   Zuber, MT
   McNutt, RL
AF Anderson, Brian J.
   Johnson, Catherine L.
   Korth, Haje
   Winslow, Reka M.
   Borovsky, Joseph E.
   Purucker, Michael E.
   Slavin, James A.
   Solomon, Sean C.
   Zuber, Maria T.
   McNutt, Ralph L., Jr.
TI Low-degree structure in Mercury's planetary magnetic field
SO JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
LA English
DT Article
ID DYNAMO ACTION; MESSENGER OBSERVATIONS; THERMOELECTRIC DYNAMO; SHELL
   GEOMETRY; MODELS; CONVECTION; MISSION; ORIGIN; CORE
AB The structure of Mercury's internal magnetic field has been determined from analysis of orbital Magnetometer measurements by the MESSENGER spacecraft. We identified the magnetic equator on 531 low-altitude and 120 high-altitude equator crossings from the zero in the radial cylindrical magnetic field component, B-rho. The low-altitude crossings are offset 479 +/- 6 km northward, indicating an offset of the planetary dipole. The tilt of the magnetic pole relative to the planetary spin axis is less than 0.8 degrees. The high-altitude crossings yield a northward offset of the magnetic equator of 486 +/- 74 km. A field with only nonzero dipole and octupole coefficients also matches the low-altitude observations but cannot yield off-equatorial B-rho = 0 at radial distances greater than 3520 km. We compared offset dipole and other descriptions of the field with vector field observations below 600 km for 13 longitudinally distributed, magnetically quiet orbits. An offset dipole with southward directed moment of 190 nT-R-M(3) yields root-mean-square (RMS) residuals below 14 nT, whereas a field with only dipole and octupole terms tuned to match the polar field and the low-altitude magnetic equator crossings yields RMS residuals up to 68 nT. Attributing the residuals from the offset-dipole field to axial degree 3 and 4 contributions we estimate that the Gauss coefficient magnitudes for the additional terms are less than 4% and 7%, respectively, relative to the dipole. The axial alignment and prominent quadrupole are consistent with a non-convecting layer above a deep dynamo in Mercury's fluid outer core.
C1 [Anderson, Brian J.; Korth, Haje; McNutt, Ralph L., Jr.] Johns Hopkins Univ, Appl Phys Lab, Dept Space, Laurel, MD 20723 USA.
   [Johnson, Catherine L.; Winslow, Reka M.] Univ British Columbia, Dept Earth & Ocean Sci, Vancouver, BC V5Z 1M9, Canada.
   [Johnson, Catherine L.] Planetary Sci Inst, Tucson, AZ USA.
   [Borovsky, Joseph E.] Space Sci Inst, Boulder, CO USA.
   [Purucker, Michael E.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
   [Slavin, James A.] Univ Michigan, Dept Atmospher Ocean & Space Sci, Ann Arbor, MI 48109 USA.
   [Solomon, Sean C.] Carnegie Inst Sci, Dept Terr Magnetism, Washington, DC 20015 USA.
   [Solomon, Sean C.] Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY USA.
   [Zuber, Maria T.] MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA USA.
RP Anderson, BJ (reprint author), Johns Hopkins Univ, Appl Phys Lab, Dept Space, 11100 Johns Hopkins Rd,MS B200-E230, Laurel, MD 20723 USA.
EM brian.anderson@jhuapl.edu
RI Slavin, James/H-3170-2012; McNutt, Ralph/E-8006-2010
OI Slavin, James/0000-0002-9206-724X; McNutt, Ralph/0000-0002-4722-9166
FU NASA [NAS5-97271, NASW-00002, CCMSM-24]; MESSENGER Participating
   Scientist grants [NNX11AB84G, NNH08CC05C]; Natural Sciences and
   Engineering Research Council of Canada
FX The MESSENGER project is supported by the NASA Discovery Program under
   contracts NAS5-97271 to The Johns Hopkins University Applied Physics
   Laboratory and NASW-00002 to the Carnegie Institution of Washington.
   C.L.J. and M. E. P. are supported by MESSENGER Participating Scientist
   grants NNX11AB84G and NNH08CC05C. R. M. W. and C.L.J. acknowledge
   support from the Natural Sciences and Engineering Research Council of
   Canada. J.E.B. is supported by the NASA CCMSM-24 Program.
NR 50
TC 46
Z9 46
U1 1
U2 26
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0148-0227
J9 J GEOPHYS RES-PLANET
JI J. Geophys. Res.-Planets
PD DEC 7
PY 2012
VL 117
AR E00L12
DI 10.1029/2012JE004159
PG 17
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 051AH
UT WOS:000312095800002
ER

PT J
AU Burger, MH
   Killen, RM
   McClintock, WE
   Vervack, RJ
   Merkel, AW
   Sprague, AL
   Sarantos, M
AF Burger, Matthew H.
   Killen, Rosemary M.
   McClintock, William E.
   Vervack, Ronald J., Jr.
   Merkel, Aimee W.
   Sprague, Ann L.
   Sarantos, Menelaos
TI Modeling MESSENGER observations of calcium in Mercury's exosphere
SO JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
LA English
DT Article
ID SODIUM; ATMOSPHERE; FLYBY; DESORPTION; MARINER-10; DISCOVERY; POTASSIUM;
   MAGNESIUM; TRANSIT; SURFACE
AB The Mercury Atmospheric and Surface Composition Spectrometer (MASCS) on the MESSENGER spacecraft has made the first high-spatial-resolution observations of exospheric calcium at Mercury. We use a Monte Carlo model of the exosphere to track the trajectories of calcium atoms ejected from the surface until they are photoionized, escape from the system, or stick to the surface. This model permits an exploration of exospheric source processes and interactions among neutral atoms, solar radiation, and the planetary surface. The MASCS data have suggested that a persistent, high-energy source of calcium that was enhanced in the dawn, equatorial region of Mercury was active during MESSENGER's three flybys of Mercury and during the first seven orbits for which MASCS obtained data. The total Ca source rate from the surface varied between 1.2 x 10(23) and 2.6 x 10(23) Ca atoms s(-1), if its temperature was 50,000 K. The origin of this high-energy, asymmetric source is unknown, although from this limited data set it does not appear to be consistent with micrometeoroid impact vaporization, ion sputtering, electron-stimulated desorption, or vaporization at dawn of material trapped on the cold nightside.
C1 [Burger, Matthew H.; Killen, Rosemary M.] NASA, Planetary Magnetospheres Lab, Solar Syst Explorat Div, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
   [Burger, Matthew H.] Morgan State Univ, Baltimore, MD 21239 USA.
   [McClintock, William E.; Merkel, Aimee W.] Univ Colorado, Atmospher & Space Phys Lab, Boulder, CO 80309 USA.
   [Vervack, Ronald J., Jr.] Johns Hopkins Univ, Appl Phys Lab, Laurel, MD USA.
   [Sprague, Ann L.] Univ Arizona, Lunar & Planetary Lab, Tucson, AZ 85721 USA.
   [Sarantos, Menelaos] NASA, Heliophys Sci Div, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
   [Sarantos, Menelaos] Univ Maryland Baltimore Cty, Goddard Planetary Heliophys Inst, Catonsville, MD USA.
RP Burger, MH (reprint author), NASA, Planetary Magnetospheres Lab, Solar Syst Explorat Div, Goddard Space Flight Ctr, 8800 Greenbelt Rd, Greenbelt, MD 20771 USA.
EM matthew.burger@nasa.gov
RI Sarantos, Menelaos/H-8136-2013; Vervack, Ronald/C-2702-2016
OI Vervack, Ronald/0000-0002-8227-9564
FU NASA [NAS5-97271, NASW-00002, NNX10AT37G]
FX The authors thank Tim Cassidy and Sean Solomon for their many helpful
   discussions and comments in the preparation of this manuscript. The
   MESSENGER project is supported by the NASA Discovery Program under
   contracts NAS5-97271 to The Johns Hopkins University Applied Physics
   Laboratory and NASW-00002 to the Carnegie Institution of Washington. MHB
   is supported for this work by NASA grant NNX10AT37G.
NR 41
TC 10
Z9 10
U1 1
U2 13
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0148-0227
J9 J GEOPHYS RES-PLANET
JI J. Geophys. Res.-Planets
PD DEC 7
PY 2012
VL 117
AR E00L11
DI 10.1029/2012JE004158
PG 15
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 051AH
UT WOS:000312095800001
ER

PT J
AU Pletsch, HJ
   Guillemot, L
   Fehrmann, H
   Allen, B
   Kramer, M
   Aulbert, C
   Ackermann, M
   Ajello, M
   de Angelis, A
   Atwood, WB
   Baldini, L
   Ballet, J
   Barbiellini, G
   Bastieri, D
   Bechtol, K
   Bellazzini, R
   Borgland, AW
   Bottacini, E
   Brandt, TJ
   Bregeon, J
   Brigida, M
   Bruel, P
   Buehler, R
   Buson, S
   Caliandro, GA
   Cameron, RA
   Caraveo, PA
   Casandjian, JM
   Cecchi, C
   Celik, O
   Charles, E
   Chaves, RCG
   Cheung, CC
   Chiang, J
   Ciprini, S
   Claus, R
   Cohen-Tanugi, J
   Conrad, J
   Cutini, S
   D'Ammando, F
   Dermer, CD
   Digel, SW
   Drell, PS
   Drlica-Wagner, A
   Dubois, R
   Dumora, D
   Favuzzi, C
   Ferrara, EC
   Franckowiak, A
   Fukazawa, Y
   Fusco, P
   Gargano, F
   Gehrels, N
   Germani, S
   Giglietto, N
   Giordano, F
   Giroletti, M
   Godfrey, G
   Grenier, IA
   Grondin, MH
   Grove, JE
   Guiriec, S
   Hadasch, D
   Hanabata, Y
   Harding, AK
   den Hartog, PR
   Hayashida, M
   Hays, E
   Hill, AB
   Hou, X
   Hughes, RE
   Johannesson, G
   Jackson, MS
   Jogler, T
   Johnson, AS
   Johnson, WN
   Kataoka, J
   Kerr, M
   Knodlseder, J
   Kuss, M
   Lande, J
   Larsson, S
   Latronico, L
   Lemoine-Goumard, M
   Longo, F
   Loparco, F
   Lovellette, MN
   Lubrano, P
   Massaro, F
   Mayer, M
   Mazziotta, MN
   McEnery, JE
   Mehault, J
   Michelson, PF
   Mitthumsiri, W
   Mizuno, T
   Monzani, ME
   Morselli, A
   Moskalenko, IV
   Murgia, S
   Nakamori, T
   Nemmen, R
   Nuss, E
   Ohno, M
   Ohsugi, T
   Omodei, N
   Orienti, M
   Orlando, E
   de Palma, F
   Paneque, D
   Perkins, JS
   Piron, F
   Pivato, G
   Porter, TA
   Raino, S
   Rando, R
   Ray, PS
   Razzano, M
   Reimer, A
   Reimer, O
   Reposeur, T
   Ritz, S
   Romani, RW
   Romoli, C
   Sanchez, DA
   Parkinson, PMS
   Schulz, A
   Sgro, C
   Silva, EDE
   Siskind, EJ
   Smith, DA
   Spandre, G
   Spinelli, P
   Suson, DJ
   Takahashi, H
   Tanaka, T
   Thayer, JB
   Thayer, JG
   Thompson, DJ
   Tibaldo, L
   Tinivella, M
   Troja, E
   Usher, TL
   Vandenbroucke, J
   Vasileiou, V
   Vianello, G
   Vitale, V
   Waite, AP
   Winer, BL
   Wood, KS
   Wood, M
   Yang, Z
   Zimmer, S
AF Pletsch, H. J.
   Guillemot, L.
   Fehrmann, H.
   Allen, B.
   Kramer, M.
   Aulbert, C.
   Ackermann, M.
   Ajello, M.
   de Angelis, A.
   Atwood, W. B.
   Baldini, L.
   Ballet, J.
   Barbiellini, G.
   Bastieri, D.
   Bechtol, K.
   Bellazzini, R.
   Borgland, A. W.
   Bottacini, E.
   Brandt, T. J.
   Bregeon, J.
   Brigida, M.
   Bruel, P.
   Buehler, R.
   Buson, S.
   Caliandro, G. A.
   Cameron, R. A.
   Caraveo, P. A.
   Casandjian, J. M.
   Cecchi, C.
   Celik, Oe
   Charles, E.
   Chaves, R. C. G.
   Cheung, C. C.
   Chiang, J.
   Ciprini, S.
   Claus, R.
   Cohen-Tanugi, J.
   Conrad, J.
   Cutini, S.
   D'Ammando, F.
   Dermer, C. D.
   Digel, S. W.
   Drell, P. S.
   Drlica-Wagner, A.
   Dubois, R.
   Dumora, D.
   Favuzzi, C.
   Ferrara, E. C.
   Franckowiak, A.
   Fukazawa, Y.
   Fusco, P.
   Gargano, F.
   Gehrels, N.
   Germani, S.
   Giglietto, N.
   Giordano, F.
   Giroletti, M.
   Godfrey, G.
   Grenier, I. A.
   Grondin, M. -H.
   Grove, J. E.
   Guiriec, S.
   Hadasch, D.
   Hanabata, Y.
   Harding, A. K.
   den Hartog, P. R.
   Hayashida, M.
   Hays, E.
   Hill, A. B.
   Hou, X.
   Hughes, R. E.
   Johannesson, G.
   Jackson, M. S.
   Jogler, T.
   Johnson, A. S.
   Johnson, W. N.
   Kataoka, J.
   Kerr, M.
   Knoedlseder, J.
   Kuss, M.
   Lande, J.
   Larsson, S.
   Latronico, L.
   Lemoine-Goumard, M.
   Longo, F.
   Loparco, F.
   Lovellette, M. N.
   Lubrano, P.
   Massaro, F.
   Mayer, M.
   Mazziotta, M. N.
   McEnery, J. E.
   Mehault, J.
   Michelson, P. F.
   Mitthumsiri, W.
   Mizuno, T.
   Monzani, M. E.
   Morselli, A.
   Moskalenko, I. V.
   Murgia, S.
   Nakamori, T.
   Nemmen, R.
   Nuss, E.
   Ohno, M.
   Ohsugi, T.
   Omodei, N.
   Orienti, M.
   Orlando, E.
   de Palma, F.
   Paneque, D.
   Perkins, J. S.
   Piron, F.
   Pivato, G.
   Porter, T. A.
   Raino, S.
   Rando, R.
   Ray, P. S.
   Razzano, M.
   Reimer, A.
   Reimer, O.
   Reposeur, T.
   Ritz, S.
   Romani, R. W.
   Romoli, C.
   Sanchez, D. A.
   Parkinson, P. M. Saz
   Schulz, A.
   Sgro, C.
   do Couto e Silva, E.
   Siskind, E. J.
   Smith, D. A.
   Spandre, G.
   Spinelli, P.
   Suson, D. J.
   Takahashi, H.
   Tanaka, T.
   Thayer, J. B.
   Thayer, J. G.
   Thompson, D. J.
   Tibaldo, L.
   Tinivella, M.
   Troja, E.
   Usher, T. L.
   Vandenbroucke, J.
   Vasileiou, V.
   Vianello, G.
   Vitale, V.
   Waite, A. P.
   Winer, B. L.
   Wood, K. S.
   Wood, M.
   Yang, Z.
   Zimmer, S.
TI Binary Millisecond Pulsar Discovery via Gamma-Ray Pulsations
SO SCIENCE
LA English
DT Article
ID LARGE-AREA TELESCOPE; BLIND FREQUENCY SEARCHES; FERMI-LAT;
   SPACE-TELESCOPE; SOURCE CATALOG; POPULATION; PLANET; YOUNG
AB Millisecond pulsars, old neutron stars spun up by accreting matter from a companion star, can reach high rotation rates of hundreds of revolutions per second. Until now, all such "recycled" rotation-powered pulsars have been detected by their spin-modulated radio emission. In a computing-intensive blind search of gamma-ray data from the Fermi Large Area Telescope (with partial constraints from optical data), we detected a 2.5-millisecond pulsar, PSR J1311-3430. This unambiguously explains a formerly unidentified gamma-ray source that had been a decade-long enigma, confirming previous conjectures. The pulsar is in a circular orbit with an orbital period of only 93 minutes, the shortest of any spin-powered pulsar binary ever found.
C1 [Pletsch, H. J.; Fehrmann, H.; Allen, B.; Aulbert, C.] Albert Einstein Inst, Max Planck Inst Gravitat Phys, D-30167 Hannover, Germany.
   [Pletsch, H. J.; Fehrmann, H.; Allen, B.; Aulbert, C.] Leibniz Univ Hannover, Inst Gravitat Phys, D-30167 Hannover, Germany.
   [Guillemot, L.; Kramer, M.] Max Planck Inst Radioastron, D-53121 Bonn, Germany.
   [Allen, B.] Univ Wisconsin, Dept Phys, Milwaukee, WI 53201 USA.
   [Kramer, M.] Univ Manchester, Sch Phys & Astron, Jodrell Bank, Ctr Astrophys, Manchester M13 PPL, Lancs, England.
   [Ackermann, M.; Mayer, M.; Schulz, A.] Deutsch Elektronen Synchrotron DESY, D-15738 Zeuthen, Germany.
   [Ajello, M.; Bechtol, K.; Borgland, A. W.; Bottacini, E.; Buehler, R.; Cameron, R. A.; Charles, E.; Chiang, J.; Claus, R.; Digel, S. W.; Drell, P. S.; Drlica-Wagner, A.; Dubois, R.; Franckowiak, A.; Godfrey, G.; den Hartog, P. R.; Hayashida, M.; Hill, A. B.; Jogler, T.; Johnson, A. S.; Kerr, M.; Lande, J.; Massaro, F.; Michelson, P. F.; Mitthumsiri, W.; Monzani, M. E.; Moskalenko, I. V.; Murgia, S.; Omodei, N.; Orlando, E.; Paneque, D.; Porter, T. A.; Reimer, A.; Reimer, O.; Romani, R. W.; do Couto e Silva, E.; Tanaka, T.; Thayer, J. B.; Thayer, J. G.; Usher, T. L.; Vandenbroucke, J.; Vianello, G.; Waite, A. P.; Wood, M.] Stanford Univ, Kavli Inst Particle Astrophys & Cosmol, WW Hansen Expt Phys Lab, Dept Phys, Stanford, CA 94305 USA.
   [Ajello, M.; Bechtol, K.; Borgland, A. W.; Bottacini, E.; Buehler, R.; Cameron, R. A.; Charles, E.; Chiang, J.; Claus, R.; Digel, S. W.; Drell, P. S.; Drlica-Wagner, A.; Dubois, R.; Franckowiak, A.; Godfrey, G.; den Hartog, P. R.; Hayashida, M.; Hill, A. B.; Jogler, T.; Johnson, A. S.; Kerr, M.; Lande, J.; Massaro, F.; Michelson, P. F.; Mitthumsiri, W.; Monzani, M. E.; Moskalenko, I. V.; Murgia, S.; Omodei, N.; Orlando, E.; Paneque, D.; Porter, T. A.; Reimer, A.; Reimer, O.; Romani, R. W.; do Couto e Silva, E.; Tanaka, T.; Thayer, J. B.; Thayer, J. G.; Usher, T. L.; Vandenbroucke, J.; Vianello, G.; Waite, A. P.; Wood, M.] Stanford Univ, SLAC Natl Accelerator Lab, Stanford, CA 94305 USA.
   [de Angelis, A.] Univ Udine, Dipartimento Fis, I-33100 Udine, Italy.
   [de Angelis, A.] Ist Nazl Fis Nucl, Sez Trieste, Grp Collegato Udine, I-33100 Udine, Italy.
   [Atwood, W. B.; Razzano, M.; Ritz, S.; Parkinson, P. M. Saz] Univ Calif Santa Cruz, Dept Phys, Santa Cruz Inst Particle Phys, Santa Cruz, CA 95064 USA.
   [Atwood, W. B.; Razzano, M.; Ritz, S.; Parkinson, P. M. Saz] Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA.
   [Baldini, L.] Univ Pisa, I-56127 Pisa, Italy.
   [Baldini, L.] Ist Nazl Fis Nucl, Sez Pisa, I-56127 Pisa, Italy.
   [Ballet, J.; Casandjian, J. M.; Chaves, R. C. G.; Grenier, I. A.] Univ Paris Diderot, CEA Saclay, Serv Astrophys, CEA,IRFU,CNRS,Lab AIM, F-91191 Gif Sur Yvette, France.
   [Barbiellini, G.; Longo, F.] Ist Nazl Fis Nucl, Sez Trieste, I-34127 Trieste, Italy.
   [Barbiellini, G.; Longo, F.] Univ Trieste, Dipartimento Fis, I-34127 Trieste, Italy.
   [Bastieri, D.; Buson, S.; Rando, R.; Tibaldo, L.] Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy.
   [Bastieri, D.; Buson, S.; Pivato, G.; Rando, R.; Romoli, C.; Tibaldo, L.] Univ Padua, Dipartimento Fis & Astron G Galilei, I-35131 Padua, Italy.
   [Bellazzini, R.; Bregeon, J.; Kuss, M.; Razzano, M.; Sgro, C.; Spandre, G.; Tinivella, M.] Ist Nazl Fis Nucl, Sez Pisa, I-56127 Pisa, Italy.
   [Brandt, T. J.; Knoedlseder, J.] CNRS, IRAP, F-31028 Toulouse 4, France.
   [Brandt, T. J.; Knoedlseder, J.] Univ Toulouse, GAHEC, UPS OMP, IRAP, Toulouse, France.
   [Brigida, M.; Favuzzi, C.; Fusco, P.; Giglietto, N.; Giordano, F.; Loparco, F.; de Palma, F.; Raino, S.; Spinelli, P.] Univ Bari, Dipartimento Fis M Merlin, I-70126 Bari, Italy.
   [Brigida, M.; Favuzzi, C.; Fusco, P.; Giglietto, N.; Giordano, F.; Loparco, F.; de Palma, F.; Raino, S.; Spinelli, P.] Politecn Bari, I-70126 Bari, Italy.
   [Brigida, M.; Favuzzi, C.; Fusco, P.; Gargano, F.; Giglietto, N.; Giordano, F.; Loparco, F.; Mazziotta, M. N.; de Palma, F.; Raino, S.; Spinelli, P.] Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy.
   [Bruel, P.] Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France.
   [Caliandro, G. A.; Hadasch, D.] IEEE CSIC, Inst Ciencies Espai, Barcelona 08193, Spain.
   [Caraveo, P. A.] INAF Ist Astrofis Spaziale & Fis Cosm, I-20133 Milan, Italy.
   [Cecchi, C.; D'Ammando, F.; Germani, S.; Lubrano, P.] Ist Nazl Fis Nucl, Sez Perugia, I-06123 Perugia, Italy.
   [Cecchi, C.; Ciprini, S.; Germani, S.; Lubrano, P.] Univ Perugia, Dipartimento Fis, I-06123 Perugia, Italy.
   [Celik, Oe; Ferrara, E. C.; Gehrels, N.; Guiriec, S.; Harding, A. K.; Hays, E.; McEnery, J. E.; Nemmen, R.; Perkins, J. S.; Thompson, D. J.; Troja, E.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
   [Celik, Oe; Perkins, J. S.] CRESST, Greenbelt, MD 20771 USA.
   [Celik, Oe; Perkins, J. S.] Univ Maryland Baltimore Cty, Dept Phys, Baltimore, MD 21250 USA.
   [Celik, Oe; Perkins, J. S.] Univ Maryland Baltimore Cty, Ctr Space Sci & Technol, Baltimore, MD 21250 USA.
   [Cheung, C. C.] Natl Acad Sci, Natl Res Council, Washington, DC 20001 USA.
   [Dermer, C. D.; Grove, J. E.; Johnson, W. N.; Lovellette, M. N.; Ray, P. S.; Wood, K. S.] USN, Res Lab, Div Space Sci, Washington, DC 20375 USA.
   [Ciprini, S.; Cutini, S.] ASI, Sci Data Ctr, I-00044 Rome, Italy.
   [Cohen-Tanugi, J.; Mehault, J.; Nuss, E.; Piron, F.; Vasileiou, V.] Univ Montpellier 2, CNRS, IN2P3, Lab Univers & Particules Montpellier, Montpellier, France.
   [Conrad, J.; Larsson, S.; Yang, Z.; Zimmer, S.] Stockholm Univ, AlbaNova, Dept Phys, SE-10691 Stockholm, Sweden.
   [Conrad, J.; Jackson, M. S.; Larsson, S.; Yang, Z.; Zimmer, S.] AlbaNova, Oskar Klein Ctr Cosmoparticle Phys, SE-10691 Stockholm, Sweden.
   [D'Ammando, F.] IASF Palermo, I-90146 Palermo, Italy.
   [D'Ammando, F.] INAF Ist Astrofis Spaziale & Fis Cosm, I-00133 Rome, Italy.
   [Dumora, D.; Hou, X.; Lemoine-Goumard, M.; Reposeur, T.; Smith, D. A.] Univ Bordeaux 1, CNRS, IN2P3, Ctr Etud Nucl Bordeaux Gradignan, F-33175 Gradignan, France.
   [Fukazawa, Y.; Hanabata, Y.; Takahashi, H.] Hiroshima Univ, Dept Phys Sci, Hiroshima 7398526, Japan.
   [Giroletti, M.; Orienti, M.] INAF Ist Radioastron, I-40129 Bologna, Italy.
   [Grondin, M. -H.; Sanchez, D. A.] Max Planck Inst Kernphys, D-69029 Heidelberg, Germany.
   [Grondin, M. -H.] Heidelberg Univ, Landessternwarte, D-69117 Heidelberg, Germany.
   [Hayashida, M.] Kyoto Univ, Grad Sch Sci, Dept Astron, Sakyo Ku, Kyoto 6068502, Japan.
   [Hill, A. B.] Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, Hants, England.
   [Hughes, R. E.; Winer, B. L.] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA.
   [Hughes, R. E.; Winer, B. L.] Ohio State Univ, Ctr Cosmol & Astroparticle Phys, Columbus, OH 43210 USA.
   [Johannesson, G.] Univ Iceland, Inst Sci, IS-107 Reykjavik, Iceland.
   [Jackson, M. S.] Royal Inst Technol KTH, AlbaNova, Dept Phys, SE-10691 Stockholm, Sweden.
   [Kataoka, J.; Nakamori, T.] Waseda Univ, Res Inst Sci & Engn, Shinjuku Ku, Tokyo 1698555, Japan.
   [Larsson, S.] Stockholm Univ, Dept Astron, SE-10691 Stockholm, Sweden.
   [Latronico, L.] Ist Nazl Fis Nucl, Sez Torino, I-10125 Turin, Italy.
   [McEnery, J. E.] Univ Maryland, Dept Phys, College Pk, MD 20742 USA.
   [McEnery, J. E.] Univ Maryland, Dept Astron, College Pk, MD 20742 USA.
   [Mizuno, T.; Ohsugi, T.] Hiroshima Univ, Hiroshima Astrophys Sci Ctr, Hiroshima 7398526, Japan.
   [Morselli, A.; Vitale, V.] Ist Nazl Fis Nucl, Sez Roma Tor Vergata, I-00133 Rome, Italy.
   [Ohno, M.] JAXA, Inst Space & Astronaut Sci, Chuo Ku, Sagamihara, Kanagawa 2525210, Japan.
   [Paneque, D.] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany.
   [Perkins, J. S.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
   [Reimer, A.; Reimer, O.] Leopold Franzens Univ Innsbruck, Inst Astro & Teilchenphys, A-6020 Innsbruck, Austria.
   [Reimer, A.; Reimer, O.] Leopold Franzens Univ Innsbruck, Inst Theoret Phys, A-6020 Innsbruck, Austria.
   [Siskind, E. J.] NYCB Real Time Comp Inc, Lattingtown, NY 11560 USA.
   [Suson, D. J.] Purdue Univ Calumet, Dept Chem & Phys, Hammond, IN 46323 USA.
   [Vianello, G.] CIFS, I-10133 Turin, Italy.
   [Vitale, V.] Univ Roma Tor Vergata, Dipartimento Fis, I-00133 Rome, Italy.
RP Pletsch, HJ (reprint author), Albert Einstein Inst, Max Planck Inst Gravitat Phys, D-30167 Hannover, Germany.
EM holger.pletsch@aei.mpg.de
RI Sgro, Carmelo/K-3395-2016; Massaro, Francesco/L-9102-2016; Orlando,
   E/R-5594-2016; Morselli, Aldo/G-6769-2011; Reimer, Olaf/A-3117-2013; Saz
   Parkinson, Pablo Miguel/I-7980-2013; Nemmen, Rodrigo/O-6841-2014;
   Johannesson, Gudlaugur/O-8741-2015; Loparco, Francesco/O-8847-2015;
   Gargano, Fabio/O-8934-2015; giglietto, nicola/I-8951-2012; Moskalenko,
   Igor/A-1301-2007; Mazziotta, Mario /O-8867-2015; Rando,
   Riccardo/M-7179-2013; Hays, Elizabeth/D-3257-2012; Johnson,
   Neil/G-3309-2014
OI orienti, monica/0000-0003-4470-7094; Giroletti,
   Marcello/0000-0002-8657-8852; Baldini, Luca/0000-0002-9785-7726; Ray,
   Paul/0000-0002-5297-5278; Massaro, Francesco/0000-0002-1704-9850;
   Aulbert, Carsten/0000-0002-1481-8319; Giordano,
   Francesco/0000-0002-8651-2394; De Angelis,
   Alessandro/0000-0002-3288-2517; Caraveo, Patrizia/0000-0003-2478-8018;
   Sgro', Carmelo/0000-0001-5676-6214; SPINELLI, Paolo/0000-0001-6688-8864;
   Hill, Adam/0000-0003-3470-4834; Bastieri, Denis/0000-0002-6954-8862;
   Omodei, Nicola/0000-0002-5448-7577; Allen, Bruce/0000-0003-4285-6256;
   Morselli, Aldo/0000-0002-7704-9553; Reimer, Olaf/0000-0001-6953-1385;
   Johannesson, Gudlaugur/0000-0003-1458-7036; Loparco,
   Francesco/0000-0002-1173-5673; Gargano, Fabio/0000-0002-5055-6395;
   giglietto, nicola/0000-0002-9021-2888; Moskalenko,
   Igor/0000-0001-6141-458X; Mazziotta, Mario /0000-0001-9325-4672; 
FU Max-Planck-Gesellschaft
FX This work was supported by the Max-Planck-Gesellschaft. The Fermi LAT
   Collaboration acknowledges support from several agencies and institutes
   for both development and the operation of the LAT as well as scientific
   data analysis. These include NASA and Department of Energy (United
   States), CEA/Irfu and IN2P3/CNRS (France), ASI and INFN (Italy), MEXT,
   KEK, and JAXA (Japan), and the K. A. Wallenberg Foundation, the Swedish
   Research Council, and the National Space Board (Sweden). Additional
   support from INAF in Italy and CNES in France for science analysis
   during the operations phase is also gratefully acknowledged. Fermi LAT
   data are available from the Fermi Science Support Center
   (http://fermi.gsfc.nasa.gov/ssc).
NR 32
TC 42
Z9 42
U1 2
U2 28
PU AMER ASSOC ADVANCEMENT SCIENCE
PI WASHINGTON
PA 1200 NEW YORK AVE, NW, WASHINGTON, DC 20005 USA
SN 0036-8075
EI 1095-9203
J9 SCIENCE
JI Science
PD DEC 7
PY 2012
VL 338
IS 6112
BP 1314
EP 1317
DI 10.1126/science.1229054
PG 4
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 049NZ
UT WOS:000311991200058
PM 23112297
ER

PT J
AU Minazzoli, O
AF Minazzoli, Olivier
TI 2PN/RM gauge invariance in Brans-Dicke-like scalar-tensor theories
SO CLASSICAL AND QUANTUM GRAVITY
LA English
DT Article
ID DEFLECTION; LIGHT
AB In this note, we study the 2PN/RM gauge invariance structure of Brans-Dicke-like scalar-tensor theories (STT) without potential. Since the spherical isotropic metric plays an important role in the literature, its 2PN/RM STT version is deduced from the general equations given by Minazzoli and Chauvineau (2011 Class. Quantum Grav. 28 085010), by using the invariance structure properties. It is found that the second-order Eddington parameter is an element of can be written in terms of the usual post-Newtonian parameter gamma and beta as is an element of = 4/3 gamma(2) + 4/3 beta - 1/6 gamma - 3/2.
C1 CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
RP Minazzoli, O (reprint author), CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
EM ominazzo@caltech.edu
OI Minazzoli, Olivier/0000-0002-3151-7593
FU NASA Postdoctoral Program at the Jet Propulsion Laboratory, California
   Institute of Technology; NASA (California Institute of Technology)
FX This research was supported by an appointment to the NASA Postdoctoral
   Program at the Jet Propulsion Laboratory, California Institute of
   Technology, administered by Oak Ridge Associated Universities through a
   contract with NASA (California Institute of Technology, copyright 2012).
   Government sponsorship is also acknowledged.
NR 12
TC 1
Z9 1
U1 0
U2 1
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0264-9381
J9 CLASSICAL QUANT GRAV
JI Class. Quantum Gravity
PD DEC 7
PY 2012
VL 29
IS 23
AR 237002
DI 10.1088/0264-9381/29/23/237002
PG 5
WC Astronomy & Astrophysics; Physics, Multidisciplinary; Physics, Particles
   & Fields
SC Astronomy & Astrophysics; Physics
GA 037KC
UT WOS:000311101800032
ER

PT J
AU Churnside, JH
   Marchbanks, RD
   Lee, JH
   Shaw, JA
   Weidemann, A
   Donaghay, PL
AF Churnside, James H.
   Marchbanks, Richard D.
   Lee, Jennifer H.
   Shaw, Joseph A.
   Weidemann, Alan
   Donaghay, Percy L.
TI Airborne lidar detection and characterization of internal waves in a
   shallow fjord
SO JOURNAL OF APPLIED REMOTE SENSING
LA English
DT Article
DE ocean optics; lidar; internal waves; plankton; thin layers
ID BACKSCATTERING TARGET DETECTION; LINEARLY POLARIZED-LIGHT; SYNTHETIC
   APERTURE RADAR; SCATTERING LAYERS; TURBID MEDIUM; THIN-LAYERS; OCEAN;
   DEPOLARIZATION; PHYTOPLANKTON; CALIFORNIA
AB A dual-polarization lidar and photography are used to sense internal waves in West Sound, Orcas Island, Washington, from a small aircraft. The airborne lidar detected a thin plankton layer at the bottom of the upper layer of the water, and this signal provides the depth of the upper layer, amplitude of the internal waves, and the propagation speed. The lidar is most effective when the polarization filter on the receiver is orthogonal to the transmitted light, but this does not depend significantly on whether the transmitted light is linearly or circularly polarized. The depolarization is greater with circular polarization, and our results are consistent with a single parameter Mueller scattering matrix. Photographs of the surface manifestation of the internal waves clearly show the propagation direction and width of the phase fronts of the internal waves, even though the contrast is low (2%). Combined with the lidar profile, the total energy of the internal wave packet was estimated to be 9 MJ. (C) 2012 Society of Photo-Optical Instrumentation Engineers (SPIE). [DOI: 10.1117/1.JRS.6.063611]
C1 [Churnside, James H.; Lee, Jennifer H.] NOAA, Earth Syst Res Lab, Boulder, CO 80305 USA.
   [Marchbanks, Richard D.] Univ Colorado, Boulder, CO 80305 USA.
   [Marchbanks, Richard D.] NOAA, Earth Syst Res Lab, Cooperat Inst Res Environm Sci, Boulder, CO 80305 USA.
   [Shaw, Joseph A.] Montana State Univ, Opt Technol Ctr, Bozeman, MT 59717 USA.
   [Shaw, Joseph A.] Elect & Comp Engn Dept, Bozeman, MT 59717 USA.
   [Weidemann, Alan] USN, Res Lab, Stennis Space Ctr, Stennis Space Ctr, MS 39529 USA.
   [Donaghay, Percy L.] Univ Rhode Isl, Grad Sch Oceanog, Narragansett, RI 02874 USA.
RP Churnside, JH (reprint author), NOAA, Earth Syst Res Lab, 325 Broadway, Boulder, CO 80305 USA.
EM james.h.churnside@noaa.gov
RI Churnside, James/H-4873-2013; Marchbanks, Richard/I-4410-2013; chen,
   zhu/K-5923-2013; Manager, CSD Publications/B-2789-2015
FU Office of Naval Research [N0001410IP20035, N000140811217]
FX This work was partially supported by the Office of Naval Research under
   Grants N0001410IP20035 and N000140811217. Our pilot was Jay Palmer.
NR 53
TC 10
Z9 10
U1 1
U2 19
PU SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
PI BELLINGHAM
PA 1000 20TH ST, PO BOX 10, BELLINGHAM, WA 98225 USA
SN 1931-3195
J9 J APPL REMOTE SENS
JI J. Appl. Remote Sens.
PD DEC 5
PY 2012
VL 6
AR 063611
DI 10.1117/1.JRS.6.063611
PG 15
WC Environmental Sciences; Remote Sensing; Imaging Science & Photographic
   Technology
SC Environmental Sciences & Ecology; Remote Sensing; Imaging Science &
   Photographic Technology
GA 094JE
UT WOS:000315258000001
ER

PT J
AU Klimchuk, JA
AF Klimchuk, J. A.
TI The role of type II spicules in the upper solar atmosphere
SO JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
LA English
DT Article
ID ULTRAVIOLET IMAGING SPECTROMETER; LINE-PROFILE ASYMMETRIES;
   ACTIVE-REGION LOOPS; EXTREME-ULTRAVIOLET; CORONAL LOOPS; TRANSITION
   REGION; QUIET-SUN; SPECTROSCOPIC OBSERVATIONS; EMISSION MEASURE;
   ELECTRON-DENSITIES
AB We examine the suggestion that most of the hot plasma in the Sun's corona comes from type II spicule material that is heated as it is ejected from the chromosphere. This contrasts with the traditional view that the corona is filled via chromospheric evaporation that results from coronal heating. We explore the observational consequences of a hypothetical spicule dominated corona and conclude from the large discrepancy between predicted and actual observations that only a small fraction of the hot plasma can be supplied by spicules (<2% in active regions, <5% in the quiet Sun, and <8% in coronal holes). The red-blue asymmetries of EUV spectral lines and the ratio of lower transition region (LTR; T <= 0.1 MK) to coronal emission measures are both predicted to be 2 orders of magnitude larger than observed. Furthermore, hot spicule material would cool dramatically by adiabatic expansion as it rises into the corona, so substantial coronal heating would be needed to maintain the high temperatures that are seen at all altitudes. We suggest that the corona contains a mixture of thin strands, some of which are populated by spicule injections, but most of which are not. A majority of the observed hot emission originates in non-spicule strands and is explained by traditional coronal heating models. However, since these models predict far too little emission from the LTR, most of this emission comes from the bulk of the spicule material that is only weakly heated and visible in He II (304 angstrom) as it falls back to the surface. Citation: Klimchuk, J. A. (2012), The role of type II spicules in the upper solar atmosphere, J. Geophys. Res., 117, A12102, doi:10.1029/2012JA018170.
C1 NASA Goddard Space Flight Ctr, Heliophys Div, Greenbelt, MD 20771 USA.
RP Klimchuk, JA (reprint author), NASA Goddard Space Flight Ctr, Heliophys Div, 8800 Greenbelt Rd, Greenbelt, MD 20771 USA.
EM james.a.klimchuk@nasa.gov
FU NASA Supporting Research and Technology Program
FX This work was supported by the NASA Supporting Research and Technology
   Program. The author thanks many people for useful discussions, but
   especially Bart De Pontieu. Martin Laming, Scott McIntosh, John Raymond,
   Karel Schrijver, Alphonse Sterling, Peter Cargill, Steve Bradshaw, and
   Nicholeen Viall were also particularly helpful.
NR 57
TC 34
Z9 34
U1 1
U2 6
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 0148-0227
J9 J GEOPHYS RES-SPACE
JI J. Geophys. Res-Space Phys.
PD DEC 5
PY 2012
VL 117
AR A12102
DI 10.1029/2012JA018170
PG 11
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 051DY
UT WOS:000312106600002
ER

PT J
AU Khouri, MG
   Douglas, PS
   Mackey, JR
   Martin, M
   Scott, JM
   Scherrer-Crosbie, M
   Jones, LW
AF Khouri, Michel G.
   Douglas, Pamela S.
   Mackey, John R.
   Martin, Miguel
   Scott, Jessica M.
   Scherrer-Crosbie, Marielle
   Jones, Lee W.
TI Cancer Therapy-Induced Cardiac Toxicity in Early Breast Cancer
   Addressing the Unresolved Issues
SO CIRCULATION
LA English
DT Review
DE cardiomyopathies; chemotherapy; heart failure; women
ID LEFT-VENTRICULAR DYSFUNCTION; HIGH-DOSE CHEMOTHERAPY;
   ANTHRACYCLINE-INDUCED CARDIOTOXICITY; TRASTUZUMAB-RELATED
   CARDIOTOXICITY; CONGESTIVE-HEART-FAILURE; DOXORUBICIN-INDUCED
   CARDIOMYOPATHY; DRUG-INDUCED CARDIOTOXICITY; ADJUVANT ENDOCRINE THERAPY;
   PROGENITOR-CELL FUNCTION; ASSOCIATION TASK-FORCE
C1 [Khouri, Michel G.; Douglas, Pamela S.; Jones, Lee W.] Duke Univ, Med Ctr, Durham, NC USA.
   [Mackey, John R.] Cross Canc Inst, Edmonton, AB T6G 1Z2, Canada.
   [Martin, Miguel] Univ Complutense, Hosp Gen Univ Gregorio Maranon, E-28040 Madrid, Spain.
   [Scott, Jessica M.] NASA, Johnson Space Ctr, Houston, TX USA.
   [Scherrer-Crosbie, Marielle] Harvard Univ, Massachusetts Gen Hosp, Sch Med, Boston, MA USA.
RP Jones, LW (reprint author), Duke Canc Inst, Box 3085, Durham, NC 27710 USA.
EM lee.w.jones@duke.edu
OI MARTIN, MIGUEL/0000-0001-9237-3231
FU National Institutes of Health [CA143254, CA142566, CA138634, CA133895];
   Susan G. Komen Investigator Initiated Grant
FX Dr Jones is supported by National Institutes of Health grants CA143254,
   CA142566, CA138634, and CA133895 and funds from George and Susan
   Beischer. Dr Scherrer-Crosbie is supported by a Susan G. Komen
   Investigator Initiated Grant.
NR 146
TC 58
Z9 59
U1 0
U2 17
PU LIPPINCOTT WILLIAMS & WILKINS
PI PHILADELPHIA
PA 530 WALNUT ST, PHILADELPHIA, PA 19106-3621 USA
SN 0009-7322
J9 CIRCULATION
JI Circulation
PD DEC 4
PY 2012
VL 126
IS 23
BP 2749
EP 2763
DI 10.1161/CIRCULATIONAHA.112.100560
PG 15
WC Cardiac & Cardiovascular Systems; Peripheral Vascular Disease
SC Cardiovascular System & Cardiology
GA 048TY
UT WOS:000311937200016
PM 23212997
ER

PT J
AU Roberts, DA
AF Roberts, D. Aaron
TI Construction of Solar-Wind-Like Magnetic Fields
SO PHYSICAL REVIEW LETTERS
LA English
DT Article
ID ALFVEN WAVES; DISCONTINUITIES; TURBULENCE; EVOLUTION; MODEL
AB Fluctuations in the solar wind fields tend to not only have velocities and magnetic fields correlated in the sense consistent with Alfven waves traveling from the Sun, but they also have the magnitude of the magnetic field remarkably constant despite their being broadband. This Letter provides, for the first time, a method for constructing fields with nearly constant magnetic field, zero divergence, and with any specified power spectrum for the fluctuations of the components of the field. Every wave vector, k, is associated with two polarizations; the relative phases of these can be chosen to minimize the variance of the field magnitude while retaining the "random'' character of the fields. The method is applied to a case with one spatial coordinate that demonstrates good agreement with observed time series and power spectra of the magnetic field in the solar wind, as well as with the distribution of the angles of rapid changes ("discontinuities''), thus showing a deep connection between two seemingly unrelated issues. It is suggested that using this construction will lead to more realistic simulations of solar wind turbulence and of the propagation of energetic particles. DOI: 10.1103/PhysRevLett.109.231102
C1 NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
RP Roberts, DA (reprint author), NASA, Goddard Space Flight Ctr, Code 672, Greenbelt, MD 20771 USA.
FU NASA's LWS TRT program
FX The author thanks the ACE MFI team and NASA's Space Physics Data
   Facility for provision of data, and NASA's LWS TR&T program for support
   of this research.
NR 17
TC 9
Z9 9
U1 1
U2 9
PU AMER PHYSICAL SOC
PI COLLEGE PK
PA ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
SN 0031-9007
J9 PHYS REV LETT
JI Phys. Rev. Lett.
PD DEC 4
PY 2012
VL 109
IS 23
AR 231102
DI 10.1103/PhysRevLett.109.231102
PG 4
WC Physics, Multidisciplinary
SC Physics
GA 049VJ
UT WOS:000312011200008
PM 23368180
ER

PT J
AU Priester, JH
   Ge, Y
   Mielke, RE
   Horst, AM
   Moritz, SC
   Espinosa, K
   Gelb, J
   Walker, SL
   Nisbet, RM
   An, YJ
   Schimel, JP
   Palmer, RG
   Hernandez-Viezcas, JA
   Zhao, LJ
   Gardea-Torresdey, JL
   Holden, PA
AF Priester, John H.
   Ge, Yuan
   Mielke, Randall E.
   Horst, Allison M.
   Moritz, Shelly Cole
   Espinosa, Katherine
   Gelb, Jeff
   Walker, Sharon L.
   Nisbet, Roger M.
   An, Youn-Joo
   Schimel, Joshua P.
   Palmer, Reid G.
   Hernandez-Viezcas, Jose A.
   Zhao, Lijuan
   Gardea-Torresdey, Jorge L.
   Holden, Patricia A.
TI Reply to Lombi et al.: Clear effects of manufactured nanomaterials to
   soybean
SO PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF
   AMERICA
LA English
DT Letter
C1 [Priester, John H.; Ge, Yuan; Mielke, Randall E.; Horst, Allison M.; Holden, Patricia A.] Univ Calif Santa Barbara, Bren Sch Environm Sci & Management, Santa Barbara, CA 93106 USA.
   [Priester, John H.; Ge, Yuan; Mielke, Randall E.; Horst, Allison M.; Moritz, Shelly Cole; Nisbet, Roger M.; Schimel, Joshua P.; Holden, Patricia A.] Univ Calif Santa Barbara, Earth Res Inst, Santa Barbara, CA 93106 USA.
   [Priester, John H.; Ge, Yuan; Mielke, Randall E.; Horst, Allison M.; Walker, Sharon L.; Nisbet, Roger M.; Schimel, Joshua P.; Hernandez-Viezcas, Jose A.; Zhao, Lijuan; Gardea-Torresdey, Jorge L.; Holden, Patricia A.] Univ Calif Santa Barbara, UC Ctr Environm Implicat Nanotechnol, Santa Barbara, CA 93106 USA.
   [Nisbet, Roger M.; Schimel, Joshua P.] Univ Calif Santa Barbara, Dept Ecol Evolut & Marine Biol, Santa Barbara, CA 93106 USA.
   [Mielke, Randall E.] CALTECH, NASA, Jet Prop Lab, Divis Geol & Planetary Sci, Pasadena, CA 91101 USA.
   [Espinosa, Katherine; Palmer, Reid G.; Zhao, Lijuan] Iowa State Univ, Dept Agron, Ames, IA 50011 USA.
   [Gelb, Jeff] Xradia Corp, Pleasanton, CA 94588 USA.
   [Walker, Sharon L.] Univ Calif Riverside, Dept Chem & Environm Engn, Riverside, CA 92521 USA.
   [An, Youn-Joo] Konkuk Univ, Dept Environm Sci, Seoul 143701, South Korea.
   [Palmer, Reid G.] ARS, Corn Insects & Crop Genet Res Unit, USDA, Ames, IA 50011 USA.
   [Hernandez-Viezcas, Jose A.; Zhao, Lijuan; Gardea-Torresdey, Jorge L.] Univ Texas El Paso, Dept Chem, El Paso, TX 79968 USA.
RP Holden, PA (reprint author), Univ Calif Santa Barbara, Bren Sch Environm Sci & Management, Santa Barbara, CA 93106 USA.
EM holden@bren.ucsb.edu
RI Nisbet, Roger/B-6951-2014; Ge, Yuan/D-2997-2009
OI Ge, Yuan/0000-0003-0234-5638
NR 3
TC 1
Z9 1
U1 2
U2 40
PU NATL ACAD SCIENCES
PI WASHINGTON
PA 2101 CONSTITUTION AVE NW, WASHINGTON, DC 20418 USA
SN 0027-8424
J9 P NATL ACAD SCI USA
JI Proc. Natl. Acad. Sci. U. S. A.
PD DEC 4
PY 2012
VL 109
IS 49
BP E3337
EP E3337
DI 10.1073/pnas.1215763109
PG 1
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 054MF
UT WOS:000312347200004
ER

PT J
AU Freeman, JL
   Marcus, MA
   Fakra, SC
   Devonshire, J
   McGrath, SP
   Quinn, CF
   Pilon-Smits, EAH
AF Freeman, John L.
   Marcus, Matthew A.
   Fakra, Sirine C.
   Devonshire, Jean
   McGrath, Steve P.
   Quinn, Colin F.
   Pilon-Smits, Elizabeth A. H.
TI Selenium Hyperaccumulator Plants Stanleya pinnata and Astragalus
   bisulcatus Are Colonized by Se-Resistant, Se-Excluding Wasp and Beetle
   Seed Herbivores
SO PLOS ONE
LA English
DT Article
ID LOCATING SELENIFEROUS AREAS; WESTERN UNITED-STATES; INDICATOR PLANTS;
   PROTECTS PLANTS; ACCUMULATION; SPECIATION; TOLERANCE; TOXICITY;
   TRANSLOCATION; DETERRENCE
AB Selenium (Se) hyperaccumulator plants can concentrate the toxic element Se up to 1% of shoot (DW) which is known to protect hyperaccumulator plants from generalist herbivores. There is evidence for Se-resistant insect herbivores capable of feeding upon hyperaccumulators. In this study, resistance to Se was investigated in seed chalcids and seed beetles found consuming seeds inside pods of Se-hyperaccumulator species Astragalus bisulcatus and Stanleya pinnata. Selenium accumulation, localization and speciation were determined in seeds collected from hyperaccumulators in a seleniferous habitat and in seed herbivores. Astragalus bisulcatus seeds were consumed by seed beetle larvae (Acanthoscelides fraterculus Horn, Coleoptera: Bruchidae) and seed chalcid larvae (Bruchophagus mexicanus, Hymenoptera: Eurytomidae). Stanleya pinnata seeds were consumed by an unidentified seed chalcid larva. Micro X-ray absorption near-edge structure (mu XANES) and micro-X-Ray Fluorescence mapping (mu XRF) demonstrated Se was mostly organic C-Se-C forms in seeds of both hyperaccumulators, and S. pinnata seeds contained similar to 24% elemental Se. Liquid chromatography-mass spectrometry of Se-compounds in S. pinnata seeds detected the C-Se-C compound seleno-cystathionine while previous studies of A. bisulcatus seeds detected the C-Se-C compounds methyl-selenocysteine and gamma-glutamyl-methyl-selenocysteine. Micro-XRF and mu XANES revealed Se ingested from hyperaccumulator seeds redistributed throughout seed herbivore tissues, and portions of seed C-Se-C were biotransformed into selenocysteine, selenocystine, selenodiglutathione, selenate and selenite. Astragalus bisulcatus seeds contained on average 5,750 mu g Se g(-1), however adult beetles and adult chalcid wasps emerging from A. bisulcatus seed pods contained 4-6 mu g Se g(-1). Stanleya pinnata seeds contained 1,329 mu g Se g(-1) on average; however chalcid wasp larvae and adults emerging from S. pinnata seed pods contained 9 and 47 mu g Se g(-1). The results suggest Se resistant seed herbivores exclude Se, greatly reducing tissue accumulation; this explains their ability to consume high-Se seeds without suffering toxicity, allowing them to occupy the unique niche offered by Se hyperaccumulator plants. Citation: Freeman JL, Marcus MA, Fakra SC, Devonshire J, McGrath SP, et al. (2012) Selenium Hyperaccumulator Plants Stanleya pinnata and Astragalus bisulcatus Are Colonized by Se-Resistant, Se-Excluding Wasp and Beetle Seed Herbivores. PLoS ONE 7(12): e50516. doi:10.1371/journal.pone.0050516
C1 [Freeman, John L.] Calif State Univ Fresno, Dept Biol, Fresno, CA 93740 USA.
   [Freeman, John L.] Intrinsyx Technol Corp, Moffett Field, CA USA.
   [Freeman, John L.] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
   [Marcus, Matthew A.; Fakra, Sirine C.] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA.
   [Devonshire, Jean; McGrath, Steve P.] Rothamsted Res, Harpenden, Herts, England.
   [Quinn, Colin F.; Pilon-Smits, Elizabeth A. H.] Colorado State Univ, Dept Biol, Ft Collins, CO 80523 USA.
RP Freeman, JL (reprint author), Calif State Univ Fresno, Dept Biol, Fresno, CA 93740 USA.
EM John.L.Freeman@NASA.gov
RI McGrath, Steve/B-5127-2008
OI McGrath, Steve/0000-0003-0952-8947
FU National Science Foundation [IOS-0817748]; Office of Science, Basic
   Energy Sciences, and Division of Materials Science of the U.S.
   Department of Energy [DE-AC02-05CH11231]; Biotechnology and Biological
   Sciences Research Council of the UK
FX Funding for these studies was provided by National Science Foundation
   grant #IOS-0817748 to EAHP. The Advanced Light Source is supported by
   the Office of Science, Basic Energy Sciences, and Division of Materials
   Science of the U.S. Department of Energy (DE-AC02-05CH11231). Rothamsted
   Research received grant-aided support from the Biotechnology and
   Biological Sciences Research Council of the UK. The funders had no role
   in study design, data collection and analysis, decision to publish, or
   preparation of the manuscript.
NR 33
TC 10
Z9 10
U1 1
U2 42
PU PUBLIC LIBRARY SCIENCE
PI SAN FRANCISCO
PA 1160 BATTERY STREET, STE 100, SAN FRANCISCO, CA 94111 USA
SN 1932-6203
J9 PLOS ONE
JI PLoS One
PD DEC 3
PY 2012
VL 7
IS 12
AR e50516
DI 10.1371/journal.pone.0050516
PG 12
WC Multidisciplinary Sciences
SC Science & Technology - Other Topics
GA 051DH
UT WOS:000312104700020
PM 23226523
ER

PT J
AU D'Antoni, HL
AF D'Antoni, Hector L.
TI OBITUARY ALBERTO REX GONZALEZ 16th November 1918-28th March 2012
   Anthropologist, had works published
SO INTERSECCIONES EN ANTROPOLOGIA
LA Spanish
DT Biographical-Item
C1 NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
RP D'Antoni, HL (reprint author), NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
EM hector.dantoni@gmail.com
NR 1
TC 0
Z9 0
U1 0
U2 0
PU UNIV NAC CENTRO PROVINCIA BUENOS AIRES
PI BUENOS AIRES
PA FAC CIENCIAS SOCIALES, AVE ARISTOBULO DEL VALLE 5737, BUENOS AIRES,
   OLAVARIA 7400, ARGENTINA
SN 1850-373X
J9 INTERSECCIONES ANTRO
JI Intersecciones Antropol.
PD DEC
PY 2012
VL 13
IS 2
BP 5
EP 6
PG 2
WC Anthropology; Archaeology
SC Anthropology; Archaeology
GA 172LF
UT WOS:000321003900001
ER

PT J
AU Kassianov, E
   Flynn, C
   Redemann, J
   Schmid, B
   Russell, PB
   Sinyuk, A
AF Kassianov, Evgueni
   Flynn, Connor
   Redemann, Jens
   Schmid, Beat
   Russell, Philip B.
   Sinyuk, Alexander
TI Initial Assessment of the Spectrometer for Sky-Scanning, Sun-Tracking
   Atmospheric Research (4STAR)-Based Aerosol Retrieval: Sensitivity Study
SO ATMOSPHERE
LA English
DT Article
DE Spectrometer for Sky-Scanning; Sun-Tracking Atmospheric Research
   (4STAR); retrievals of aerosol microphysical and optical properties;
   airborne multi-angular and multi-spectral measurements; sky radiance and
   direct-beam sun transmittance; operational AERONET aerosol retrieval;
   direct aerosol radiative forcing; sensitivity study
ID OPTICAL-PROPERTIES; RADIANCE MEASUREMENTS; INVERSION ALGORITHM;
   MULTIPLE-SCATTERING; AERONET; NETWORK; MODELS; ABSORPTION; COMPONENT
AB The Spectrometer for Sky-Scanning, Sun-Tracking Atmospheric Research (4STAR) being developed for airborne measurements will offer retrievals of aerosol microphysical and optical properties from multi-angular and multi-spectral measurements of sky radiance and direct-beam sun transmittance. In this study, we assess the expected accuracy of the 4STAR-based aerosol retrieval and its sensitivity to major sources of anticipated perturbations in the 4STAR measurements. The major anticipated perturbations are (1) an apparent enhancement of sky radiance at small scattering angles associated with the necessarily compact design of the 4STAR and (2) an offset (i.e., uncertainty) of sky radiance calibration independent of scattering angle. The assessment is performed through application of the operational AERONET aerosol retrieval and constructed synthetic 4STAR-like data. Particular attention is given to the impact of these perturbations on the broadband fluxes and the direct aerosol radiative forcing. The results from this study suggest that limitations in the accuracy of 4STAR-retrieved particle size distributions and scattering phase functions have diminished impact on the accuracy of retrieved bulk microphysical parameters, permitting quite accurate retrievals of properties including the effective radius (up to 10%, or 0.03), and the radiatively important optical properties, such as the asymmetry factor (up to 4%, or +/- 0.02) and single-scattering albedo (up to 6%, or +/- 0.04). Also, the obtained results indicate that the uncertainties in the retrieved aerosol optical properties are quite small in the context of the calculated fluxes and direct aerosol radiative forcing (up to 15%, or 3 W.m(-2)).
C1 [Kassianov, Evgueni; Flynn, Connor; Schmid, Beat] Pacific NW Natl Lab, Richland, WA 99352 USA.
   [Redemann, Jens] BAERI, Sonoma, CA 95476 USA.
   [Russell, Philip B.] NASA ARC, Moffett Field, CA 94035 USA.
   [Sinyuk, Alexander] NASA GSFC, Greenbelt, MD 20771 USA.
RP Kassianov, E (reprint author), Pacific NW Natl Lab, Richland, WA 99352 USA.
EM Evgueni.Kassianov@pnnl.gov; Connor.Flynn@pnnl.gov;
   Jens.Redemann-1@nasa.gov; Beat.Schmid@pnnl.gov;
   philip.b.russell@nasa.gov; aliaksandr.sinyuk-1@nasa.gov
FU Office of Biological and Environmental Research (OBER) of the U.S.
   Department of Energy (DOE) as part of the Atmospheric Radiation
   Measurement (ARM) Program; Office of Biological and Environmental
   Research (OBER) of the U.S. Department of Energy (DOE) as part of the
   Atmospheric Systems Research (ASR) Program; DOE [DE-A06-76RLO 1830];
   NASA Radiation Science Program
FX This work has been supported by the Office of Biological and
   Environmental Research (OBER) of the U.S. Department of Energy (DOE) as
   part of the Atmospheric Radiation Measurement (ARM) and Atmospheric
   Systems Research (ASR) Programs. The Pacific Northwest National
   Laboratory (PNNL) is operated by Battelle for the DOE under contract
   DE-A06-76RLO 1830. JR and PBR, along with 4STAR development, were
   supported by the NASA Radiation Science Program. We appreciate helpful
   discussions with Brent Holben on AERONET measurements. The authors are
   grateful to two reviewers for their helpful comments.
NR 51
TC 3
Z9 3
U1 1
U2 5
PU MDPI AG
PI BASEL
PA POSTFACH, CH-4005 BASEL, SWITZERLAND
SN 2073-4433
J9 ATMOSPHERE-BASEL
JI Atmosphere
PD DEC
PY 2012
VL 3
IS 4
BP 495
EP 521
DI 10.3390/atmos3040495
PG 27
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 175RD
UT WOS:000321248500003
ER

PT J
AU Diner, DJ
   Xu, F
   Martonchik, JV
   Rheingans, BE
   Geier, S
   Jovanovic, VM
   Davis, A
   Chipman, RA
   McClain, SC
AF Diner, David J.
   Xu, Feng
   Martonchik, John V.
   Rheingans, Brian E.
   Geier, Sven
   Jovanovic, Veljko M.
   Davis, Ab
   Chipman, Russell A.
   McClain, Stephen C.
TI Exploration of a Polarized Surface Bidirectional Reflectance Model Using
   the Ground-Based Multiangle SpectroPolarimetric Imager
SO ATMOSPHERE
LA English
DT Article
DE aerosols; remote sensing; polarization; underlying surface reflectance
ID AEROSOL PROPERTIES; PHOTOPOLARIMETRIC MEASUREMENTS; INSTRUMENT
   DESCRIPTION; LAND SURFACES; ANGLE; RETRIEVAL; AIRBORNE; DERIVATION; MISR
AB Accurate characterization of surface reflection is essential for retrieval of aerosols using downward-looking remote sensors. In this paper, observations from the Ground-based Multiangle SpectroPolarimetric Imager (GroundMSPI) are used to evaluate a surface polarized bidirectional reflectance distribution function (PBRDF) model. GroundMSPI is an eight-band spectropolarimetric camera mounted on a rotating gimbal to acquire pushbroom imagery of outdoor landscapes. The camera uses a very accurate photoelastic-modulator-based polarimetric imaging technique to acquire Stokes vector measurements in three of the instrument's bands (470, 660, and 865 nm). A description of the instrument is presented, and observations of selected targets within a scene acquired on 6 January 2010 are analyzed. Data collected during the course of the day as the Sun moved across the sky provided a range of illumination geometries that facilitated evaluation of the surface model, which is comprised of a volumetric reflection term represented by the modified Rahman-Pinty-Verstraete function plus a specular reflection term generated by a randomly oriented array of Fresnel-reflecting microfacets. While the model is fairly successful in predicting the polarized reflection from two grass targets in the scene, it does a poorer job for two manmade targets (a parking lot and a truck roof), possibly due to their greater degree of geometric organization. Several empirical adjustments to the model are explored and lead to improved fits to the data. For all targets, the data support the notion of spectral invariance in the angular shape of the unpolarized and polarized surface reflection. As noted by others, this behavior provides valuable constraints on the aerosol retrieval problem, and highlights the importance of multiangle observations.
C1 [Diner, David J.; Xu, Feng; Martonchik, John V.; Rheingans, Brian E.; Geier, Sven; Jovanovic, Veljko M.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
   [Xu, Feng] Univ Calif Los Angeles, Joint Inst Reg Earth Syst Sci & Engn, Los Angeles, CA 90095 USA.
   [Davis, Ab] Univ Texas Austin, Ctr Space Res, Austin, TX 78759 USA.
   [Chipman, Russell A.; McClain, Stephen C.] Univ Arizona, Coll Opt Sci, Tucson, AZ 85721 USA.
RP Diner, DJ (reprint author), CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
EM david.j.diner@jpl.nasa.gov; feng.xu@jpl.nasa.gov;
   john.v.martonchik@jpl.nasa.gov; brian.e.rheingans@jpl.nasa.gov;
   sven.geier@jpl.nasa.gov; veljko.m.jovanovic@jpl.nasa.gov;
   adavis@csr.utexas.edu; rchipman@optics.arizona.edu;
   smcclain@optics.arizona.edu
RI Xu, Feng/G-3673-2013
FU NASA; JPL
FX This research is being carried out at the Jet Propulsion Laboratory,
   California Institute of Technology under contract with NASA, and at the
   University of Arizona College of Optical Sciences, the University of
   Texas Center for Space Research, and the JPL/University of California
   Joint Institute for Regional Earth System Science and Engineering
   (JIFRESSE), under subcontract with JPL. We thank Anna-Britt Mahler and
   Karlton Crabtree for assistance with the design, assembly and test of
   GroundMSPI; Ghobad Saghri and Amy Wu for assistance in collecting the
   GroundMSPI data; Gary Gutt, Bruce Hancock, Nasrat Raouf, and Chris
   Wrigley for instrument engineering; and Michael Bull for data
   processing. The JPL authors' copyright for this publication is held by
   the California Institute of Technology. Government Sponsorship
   acknowledged.
NR 54
TC 14
Z9 14
U1 1
U2 24
PU MDPI AG
PI BASEL
PA POSTFACH, CH-4005 BASEL, SWITZERLAND
SN 2073-4433
J9 ATMOSPHERE-BASEL
JI Atmosphere
PD DEC
PY 2012
VL 3
IS 4
BP 591
EP 619
DI 10.3390/atmos3040591
PG 29
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 175RD
UT WOS:000321248500008
ER

PT J
AU Le Marshall, J
   Xiao, Y
   Norman, R
   Zhang, KF
   Rea, A
   Cucurull, L
   Seecamp, R
   Steinle, P
   Puri, K
   Fu, E
   Le, T
AF Le Marshall, John
   Xiao, Yi
   Norman, Robert
   Zhang, Kefei
   Rea, Anthony
   Cucurull, Lidia
   Seecamp, Rolf
   Steinle, Peter
   Puri, K.
   Fu, E.
   Le, Tan
TI The application of radio occultation observations for climate monitoring
   and numerical weather prediction in the Australian region
SO AUSTRALIAN METEOROLOGICAL AND OCEANOGRAPHIC JOURNAL
LA English
DT Article
ID GLOBAL POSITIONING SYSTEM; DATA ASSIMILATION SYSTEM; EARTHS ATMOSPHERE;
   NEUTRAL ATMOSPHERE; IMPACT; PROFILES; CHAMP; WATER
AB Space-based GPS radio occultation observations provide significant information related to current and future atmospheric state. They also enable important activities such as examination of radiosonde performance and temperature trends. Three months of radio occultation observations have been assimilated using four dimensional variational assimilation into the global Australian Community Climate Earth Systems Simulator, ACCESS-G, which is employed at the Australian Bureau of Meteorology to provide operational forecasts. The radio occultation data was found to improve the forecasts in the lower, middle and upper troposphere. The improvement varies from small, to up to eight-hours improvement in 48-hour forecasts of mean sea level pressure. Because of the relatively unbiased nature of radio occultation observations, they have been used in a comparative study with radiosonde data to probe mean annual atmospheric temperature changes in the Australian region and the southern hemisphere. In particular, differences between radio occultation data based, area weighted annual average short-term (2007-2010) temperature trends over the Australian region and the southern hemisphere and those obtained by averaging data at radiosonde network sites were noted. In the Australian region a mid and upper tropospheric area averaged temperature increase from 2007 to 2010 was accompanied by an average cooling at radiosonde sites. The radio occultation data have also been used to probe ionospheric content. Results documented here indicate the use of radio occultation data has the potential to improve operational analysis and forecasting in the Australian region and to make a very important and unique contribution to vital tasks such as climate monitoring.
C1 [Le Marshall, John; Xiao, Yi; Steinle, Peter; Puri, K.; Le, Tan] Ctr Australian Weather & Climate Res, Melbourne, Vic 3001, Australia.
   [Le Marshall, John; Norman, Robert; Zhang, Kefei; Fu, E.] RMIT Univ, Melbourne, Vic, Australia.
   [Cucurull, Lidia] NOAA, NASA, Washington, DC USA.
RP Le Marshall, J (reprint author), Ctr Australian Weather & Climate Res, GPO Box 1289, Melbourne, Vic 3001, Australia.
EM j.lemarshall@bom.gov.au
RI Cucurull, Lidia/E-8900-2015
NR 29
TC 7
Z9 7
U1 0
U2 7
PU AUSTRALIAN BUREAU METEOROLOGY
PI MELBOURNE
PA GPO BOX 1289, MELBOURNE, VIC 3001, AUSTRALIA
SN 1836-716X
J9 AUST METEOROL OCEAN
JI Aust. Meteorol. Oceanogr. J.
PD DEC
PY 2012
VL 62
IS 4
BP 323
EP 334
PG 12
WC Meteorology & Atmospheric Sciences; Oceanography
SC Meteorology & Atmospheric Sciences; Oceanography
GA 141TR
UT WOS:000318749900010
ER

PT J
AU Sears, DWG
AF Sears, Derek W. G.
TI Oral Histories in Meteoritics and Planetary ScienceXIX: Klaus Keil
SO METEORITICS & PLANETARY SCIENCE
LA English
DT Article
ID ENSTATITE CHONDRITES; ERUPTIONS; ASTEROIDS; AUBRITE
AB Klaus Keil (Fig. 1) grew up in Jena and became interested in meteorites as a student of Fritz Heide. His research for his Dr. rer. nat. became known to Hans Suess whowith some difficultyarranged for him to move to La Jolla, via Mainz, 6 months before the borders of East Germany were closed. In La Jolla, Klaus became familiar with the electron microprobe, which has remained a central tool in his research and, with Kurt Fredriksson, he confirmed the existence of Urey and Craigs chemical H and L chondrite groups, and added a third group, the LL chondrites. Klaus then moved to NASA Ames where he established a microprobe laboratory, published his definitive paper on enstatite chondrites, and led in the development of the Si(Li) detector and the EDS method of analysis. After 5 years at Ames, Klaus became director of the Institute of Meteoritics at the University of New Mexico where he built up one of the leading meteorite research groups while working on a wide variety of projects, including chondrite groups, chondrules, differentiated meteorites, lunar samples, and Hawaiian basalts. The basalt studies led to a love of Hawaii and a move to the University of Hawaii in 1990, where he has continued a wide variety of meteorite projects, notably the role of volcanism on asteroids. Klaus Keil has received honorary doctorates from Friedrich-Schiller University, Jena, and the University of New Mexico, Albuquerque. He was President of the Meteoritical Society in 19691970 and was awarded the Leonard Medal in 1988. 1 Klaus Keil at the University of Hawaii at Manoa, 2007.
C1 NASA, Space Sci & Astrobiol Div, Ames Res Ctr, Mountain View, CA 94035 USA.
RP Sears, DWG (reprint author), NASA, Space Sci & Astrobiol Div, Ames Res Ctr, MS 245-3, Mountain View, CA 94035 USA.
EM derek.sears@nasa.gov
FU NASA
FX This interview was recorded on November 10, 2011, and edited by the
   author and K. K. As of November 23, 2011, a CV, publication list, and
   other information appear on http://www.higp.hawaii.edu/similar to keil/.
   I am grateful to Don Bogard, Dieter Stoffler, and Chris Koeberl for
   reviews and Hazel Sears for reviewing and proofing this article. A grant
   from NASA supported the work.
NR 19
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PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 1086-9379
J9 METEORIT PLANET SCI
JI Meteorit. Planet. Sci.
PD DEC
PY 2012
VL 47
IS 12
BP 1891
EP 1906
DI 10.1111/j.1945-5100.2012.01416.x
PG 16
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 076VC
UT WOS:000313985800002
ER

PT J
AU Walsh, KJ
   Morbidelli, A
   Raymond, SN
   O'Brien, DP
   Mandell, AM
AF Walsh, Kevin J.
   Morbidelli, A.
   Raymond, S. N.
   O'Brien, D. P.
   Mandell, A. M.
TI Populating the asteroid belt from two parent source regions due to the
   migration of giant planets-"The Grand Tack"
SO METEORITICS & PLANETARY SCIENCE
LA English
DT Article
ID LATE HEAVY BOMBARDMENT; SOLAR-SYSTEM; TERRESTRIAL PLANETS;
   PROTOPLANETARY DISK; ORBITAL ARCHITECTURE; OLIGARCHIC GROWTH; RUNAWAY
   GROWTH; KUIPER-BELT; SNOW LINE; EVOLUTION
AB The asteroid belt is found today in a dramatically different state than that immediately following its formation. It is estimated that it has been depleted in total mass by a factor of at least 1000 since its formation, and that the asteroids orbits evolved from having near-zero eccentricity and inclination to the complex distributions we find today. The asteroid belt also hosts a wide range of compositions, with the inner regions dominated by S-type and other water-poor asteroids and the outer regions dominated by C-type and other primitive asteroids. We discuss a model of early inner solar system evolution whereby the gas-driven migration of Jupiter and Saturn brings them inwards to 1.5 AU, truncating the disk of planetesimals in the terrestrial planet region, before migrating outwards toward their current locations. This model, informally titled The Grand Tack, examines the planetary dynamics of the solar system bodies during the final million years of the gaseous solar nebula lifetimea few million years (Myr) after the formation of the first solids, but 2080 Myr before the final accretion of Earth, and approximately 400600 Myr before the Late Heavy Bombardment of the inner solar system. The Grand Tack attempts to solve some outstanding problems for terrestrial planet formation, by reproducing the size of Mars, but also has important implications for the asteroid population. The migration of Jupiter causes a very early depletion of the asteroid belt region, and this region is then repopulated from two distinct source regions, one inside the formation region of Jupiter and one between and beyond the giant planets. The scattered material reforms the asteroid belt, producing a population the appropriate mass, orbits, and with overlapping distributions of material from each parent source region.
C1 [Walsh, Kevin J.] Southwest Res Inst, Boulder, CO 80302 USA.
   [Morbidelli, A.] Univ Nice Sophia Antipolis, CNRS, Observ Cote Azur, F-06304 Nice 4, France.
   [Raymond, S. N.] Univ Bordeaux, Observ Aquitain Sci Univers, F-33270 Floirac, France.
   [Raymond, S. N.] CNRS, UMR 5804, Lab Astrophys Bordeaux, F-33270 Floirac, France.
   [O'Brien, D. P.] Planetary Sci Inst, Tucson, AZ 85719 USA.
   [Mandell, A. M.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
RP Walsh, KJ (reprint author), Southwest Res Inst, 1050 Walnut St,Suite 400, Boulder, CO 80302 USA.
EM kwalsh@boulder.swri.edu
FU Helmholtz Alliance; NLSI CLOE; NASA OSS (PI Levison); NASA's Planetary
   Geology and Geophysics program; CNRS's EPOV program; CNRS's PNP program;
   NASA Astrobiology Institute; NASA Goddard Center for Astrobiology
FX KJW acknowledges funding on this project from the Helmholtz Alliance,
   NLSI CLOE, and NASA OSS (PI Levison). DPO acknowledges support from
   NASA's Planetary Geology and Geophysics program. SNR thanks the CNRS's
   EPOV and PNP programs and the NASA Astrobiology Institute's Virtual
   Planetary Laboratory lead team. AMM acknowledges support from the NASA
   Goddard Center for Astrobiology.
NR 59
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PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 1086-9379
J9 METEORIT PLANET SCI
JI Meteorit. Planet. Sci.
PD DEC
PY 2012
VL 47
IS 12
BP 1941
EP 1947
DI 10.1111/j.1945-5100.2012.01418.x
PG 7
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 076VC
UT WOS:000313985800006
ER

PT J
AU Nuth, JA
   Paquette, JA
   Farquhar, A
AF Nuth, Joseph A., III
   Paquette, John A.
   Farquhar, Adam
TI Can lightning produce significant levels of mass-independent oxygen
   isotopic fractionation in nebular dust?
SO METEORITICS & PLANETARY SCIENCE
LA English
DT Article
ID EARLY SOLAR-SYSTEM; SELF-PERPETUATING CATALYST; COMPLEX
   ORGANIC-MOLECULES; REFRACTORY INCLUSIONS; INTRAMOLECULAR THEORY;
   ELECTRICAL-DISCHARGE; PROTOSTELLAR NEBULAE; PROTOPLANETARY DISK; OZONE;
   EVOLUTION
AB Based on recent evidence that oxide grains condensed from a plasma will contain oxygen that is mass-independently fractionated compared to the initial composition of the vapor, we present a first attempt to evaluate the potential magnitude of this effect on dust in the primitive solar nebula. This assessment relies on previous studies of nebular lightning to provide reasonable ranges of physical parameters to form a very simple model to evaluate the plausibility that lightning could affect a significant fraction of nebular dust and that such effects could cause a significant change in the oxygen isotopic composition of solids in the solar nebula over time. If only a small fraction of the accretion energy is dissipated as lightning over the volume of the inner solar nebula, then a large fraction of nebular dust will be exposed to lightning. If the temperature of such bolts is a few percent of the temperatures measured in terrestrial discharges, then dust will vaporize and recondense in an ionized environment. Finally, if only a small average decrease is assumed in the 16O content of freshly condensed dust, then over the last 5 Myr of nebular accretion the average ?17O of the dust could increase by more than 30 per mil. We conclude that it is possible that the measured slope 1 oxygen isotope line measured in meteorites and their components represents a time-evolution sequence of nebular dust over the last several million years of nebular evolution where 16O-rich materials formed first, then escaped further processing as the average isotopic composition of the dust gradually became increasingly depleted in 16O.
C1 [Nuth, Joseph A., III] NASA, Solar Syst Explorat Div, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
   [Paquette, John A.; Farquhar, Adam] NASA, Astrochem Lab, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
RP Nuth, JA (reprint author), NASA, Solar Syst Explorat Div, Goddard Space Flight Ctr, Code 690, Greenbelt, MD 20771 USA.
EM Joseph.A.Nuth@nasa.gov
FU NASA Exobiology Research and Analysis Program; NASA
FX The authors thank the NASA Exobiology Research and Analysis Program for
   financial support. J. A. P. acknowledges support from the NASA
   Postdoctoral Program supported by funding from the Astrophysics Data
   Program. The authors thank Dr. G. Wasserburg for his helpful comments.
NR 53
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PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 1086-9379
J9 METEORIT PLANET SCI
JI Meteorit. Planet. Sci.
PD DEC
PY 2012
VL 47
IS 12
BP 2056
EP 2069
DI 10.1111/maps.12037
PG 14
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 076VC
UT WOS:000313985800013
ER

PT J
AU Jogo, K
   Nagashima, K
   Hutcheon, ID
   Krot, AN
   Nakamura, T
AF Jogo, Kaori
   Nagashima, Kazuhide
   Hutcheon, Ian D.
   Krot, Alexander N.
   Nakamura, Tomoki
TI Heavily metamorphosed clasts from the CV chondrite breccias Mokoia and
   Yamato-86009
SO METEORITICS & PLANETARY SCIENCE
LA English
DT Article
ID OXYGEN ISOTOPIC COMPOSITIONS; ALLENDE DARK INCLUSIONS; CARBONACEOUS
   CHONDRITES; THERMAL METAMORPHISM; AQUEOUS ALTERATION; CO3 CHONDRITES;
   SOLAR-SYSTEM; CHONDRULES; OLIVINE; METEORITE
AB Metamorphosed clasts in the CV carbonaceous chondrite breccias Mokoia and Yamato-86009 (Y-86009) are coarse-grained, granular, polymineralic rocks composed of Ca-bearing (up to 0.6 wt% CaO) ferroan olivine (Fa3439), ferroan Al-diopside (Fs913Wo4750, approximately 27 wt% Al2O3), plagioclase (An3784Ab6317), Cr-spinel (Cr/(Cr + Al) = 0.190.45, Fe/(Fe + Mg) = 0.600.79), nepheline, pyrrhotite, pentlandite, Ca-phosphate, and rare grains of Ni-rich taenite; low-Ca pyroxene is absent. Most clasts have triple junctions between silicate grains, indicative of prolonged thermal annealing. Based on the olivine-spinel and pyroxene thermometry, the estimated metamorphic temperature recorded by the clasts is approximately 1100 K. Few clasts experienced thermal metamorphism to a lower degree and preserved chondrule-like textures. The Mokoia and Y-86009 clasts are mineralogically unique and different from metamorphosed chondrites of known groups (H, L, LL, R, EH, EL, CO, CK) and primitive achondrites (acapulcoites, brachinites, lodranites). On a three-isotope oxygen diagram, compositions of olivine in the clasts plot along carbonaceous chondrite anhydrous mineral line and the Allende mass-fractionation line, and overlap with those of the CV chondrule olivines; the Delta 17O values of the clasts range from about -4.3 parts per thousand to -3.0 parts per thousand. We suggest that the clasts represent fragments of the CV-like material that experienced metasomatic alteration, high-temperature metamorphism, and possibly melting in the interior of the CV parent asteroid. The lack of low-Ca pyroxene in the clasts could be due to its replacement by ferroan olivine during iron-alkali metasomatic alteration or by high-Ca ferroan pyroxene during melting under oxidizing conditions.
C1 [Jogo, Kaori; Nagashima, Kazuhide; Krot, Alexander N.] Univ Hawaii Manoa, Sch Ocean Earth Sci & Technol, Hawaii Inst Geophys & Planetol, Honolulu, HI 96822 USA.
   [Jogo, Kaori; Krot, Alexander N.] Univ Hawaii Manoa, NASA, Astrobiol Inst, Honolulu, HI 96822 USA.
   [Hutcheon, Ian D.] Lawrence Livermore Natl Lab, Glenn Seaborg Inst, Livermore, CA 94551 USA.
   [Nakamura, Tomoki] Tohoku Univ, Dept Earth & Planetary Mat Sci, Fac Sci, Lab Early Solar Syst Evolut, Sendai, Miyagi 9808578, Japan.
RP Jogo, K (reprint author), Univ Hawaii Manoa, Sch Ocean Earth Sci & Technol, Hawaii Inst Geophys & Planetol, Honolulu, HI 96822 USA.
EM kaori@higp.hawaii.edu
FU National Aeronautics and Space Administration through the NASA
   Astrobiology Institute [NNA09DA77A]
FX We thank M. Zolensky (Johnson Space Center), M. Petaev (Harvard
   University), and G. MacPherson (Smithsonian Institution) for providing
   polished sections of Mokoia. Constructive reviews by M. Petaev, M.
   Kimura, and E. Scott are highly appreciated. This work was supported by
   the National Aeronautics and Space Administration through the NASA
   Astrobiology Institute under Cooperative Agreement No. NNA09DA77A issued
   through the Office of Space Science.
NR 86
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U1 1
U2 15
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 1086-9379
J9 METEORIT PLANET SCI
JI Meteorit. Planet. Sci.
PD DEC
PY 2012
VL 47
IS 12
BP 2251
EP 2268
DI 10.1111/maps.12042
PG 18
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 076VC
UT WOS:000313985800025
ER

PT J
AU Toth, VT
   Turyshev, SG
AF Toth, Viktor T.
   Turyshev, Slava G.
TI FINDING THE SOURCE OF THE PIONEER ANOMALY
SO IEEE SPECTRUM
LA English
DT Article
C1 [Turyshev, Slava G.] NASA, Jet Prop Lab, Pasadena, CA USA.
RI Toth, Viktor/D-3502-2009
OI Toth, Viktor/0000-0003-3651-9843
NR 0
TC 1
Z9 1
U1 1
U2 4
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9235
J9 IEEE SPECTRUM
JI IEEE Spectr.
PD DEC
PY 2012
VL 49
IS 12
BP 38
EP 62
PG 9
WC Engineering, Electrical & Electronic
SC Engineering
GA 082LU
UT WOS:000314394100013
ER

PT J
AU Scaringi, S
   Kording, E
   Uttley, P
   Groot, PJ
   Knigge, C
   Still, M
   Jonker, P
AF Scaringi, S.
   Kording, E.
   Uttley, P.
   Groot, P. J.
   Knigge, C.
   Still, M.
   Jonker, P.
TI Broad-band timing properties of the accreting white dwarf MV Lyrae
SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
LA English
DT Article
DE accretion, accretion discs; black hole physics; binaries: close; novae,
   cataclysmic variables; stars: oscillations; stars: individual: MV Lyrae
ID QUASI-PERIODIC OSCILLATION; X-RAY BINARIES; CATACLYSMIC VARIABLES;
   NUMERICAL SIMULATIONS; URSAE MAJORIS; SW SEXTANTIS; BLACK-HOLES;
   VARIABILITY; MODEL; DISKS
AB We present a broad-band timing analysis of the accreting white dwarf system MV Lyrae based on data obtained with the Kepler satellite. The observations span 633 d at a cadence of 58.8 s and allow us to probe four orders of magnitude in temporal frequency. The modelling of the observed broad-band noise components is based on the superposition of multiple Lorentzian components, similar to the empirical modelling adopted for X-ray binary systems. We also present the detection of a frequency varying Lorentzian component in the light curve of MV Lyrae, where the Lorentzian characteristic frequency is inversely correlated with the mean source flux. Because in the literature similar broad-band noise components have been associated with either the viscous or dynamical time-scale for different source types (accreting black holes or neutron stars), we here systematically explore both scenarios and place constraints on the accretion disc structure. In the viscous case we employ the fluctuating accretion disc model to infer parameters for the viscosity and disc scale height, and infer uncomfortably high parameters to be accommodated by the standard thin disc, whilst in the dynamical case we infer a large accretion disc truncation radius of approximate to 10R(WD). More importantly however, the phenomenological properties between the broad-band variability observed here and in X-ray binaries and active galactic nuclei are very similar, potentially suggesting a common origin for the broad-band variability.
C1 [Scaringi, S.; Kording, E.; Groot, P. J.; Jonker, P.] Radboud Univ Nijmegen, Dept Astrophys IMAPP, NL-6500 GL Nijmegen, Netherlands.
   [Uttley, P.] Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1098 XH Amsterdam, Netherlands.
   [Knigge, C.] Univ Southampton, Dept Phys & Astron, Southampton SO17 1BJ, Hants, England.
   [Still, M.] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
   [Still, M.] Bay Area Environm Res Inst Inc, Sonoma, CA 95476 USA.
   [Jonker, P.] SRON Netherlands Inst Space Res, SRON, NL-3584 CA Utrecht, Netherlands.
   [Jonker, P.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
RP Scaringi, S (reprint author), Radboud Univ Nijmegen, Dept Astrophys IMAPP, POB 9010, NL-6500 GL Nijmegen, Netherlands.
EM s.scaringi@astro.ru.nl
RI Groot, Paul/K-4391-2016; 
OI Groot, Paul/0000-0002-4488-726X; Scaringi, Simone/0000-0001-5387-7189
FU NASA Science Mission directorate; NWO [600.065.140.08N306]; NASA
   [NNX11AB86G]
FX This paper includes data collected by the Kepler mission. Funding for
   the Kepler mission is provided by the NASA Science Mission directorate.
   This research has made use of NASA's Astrophysics Data System
   Bibliographic Services. SS acknowledges funding from NWO project
   600.065.140.08N306 to PJG. MS acknowledges funding from the NASA grant
   NNX11AB86G. SS wishes to acknowledge G. Nelemans and A. Achterberg for
   useful and insightful discussions.
NR 38
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PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0035-8711
J9 MON NOT R ASTRON SOC
JI Mon. Not. Roy. Astron. Soc.
PD DEC
PY 2012
VL 427
IS 4
BP 3396
EP 3405
DI 10.1111/j.1365-2966.2012.22022.x
PG 10
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 082VQ
UT WOS:000314421000011
ER

PT J
AU Schwendner, P
   Vaishampayan, P
   Miller, D
   Rabbow, E
   Moissl-Eichinger, C
   Rettberg, P
   Horneck, G
   Venkateswaran, K
AF Schwendner, P.
   Vaishampayan, P.
   Miller, D.
   Rabbow, E.
   Moissl-Eichinger, C.
   Rettberg, P.
   Horneck, G.
   Venkateswaran, K.
TI Bacillus Pumilus Spores Hitchhiking to Iss-Survivability after Exposure
   to Space and Simulated Mars Conditions
SO PALEONTOLOGICAL JOURNAL
LA English
DT Meeting Abstract
C1 [Schwendner, P.; Vaishampayan, P.; Miller, D.; Venkateswaran, K.] NASA, Jet Prop Lab, Pasadena, CA 91109 USA.
   [Rabbow, E.; Rettberg, P.; Horneck, G.] DLR Inst Aerosp Med, D-51147 Cologne, Germany.
   [Moissl-Eichinger, C.] Univ Regensburg, Ctr Microbiol & Archaea, D-93053 Regensburg, Germany.
EM petra.schwendner@dlr.de
RI Moissl-Eichinger, Christine/A-6682-2015
OI Moissl-Eichinger, Christine/0000-0001-6755-6263
NR 0
TC 1
Z9 1
U1 0
U2 11
PU MAIK NAUKA/INTERPERIODICA/SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013-1578 USA
SN 0031-0301
J9 PALEONTOL J+
JI Paleontol. J.
PD DEC
PY 2012
VL 46
IS 9
BP 1079
EP 1080
PG 2
WC Paleontology
SC Paleontology
GA 077SG
UT WOS:000314047500040
ER

PT J
AU Hajigholi, M
   Bertilsson, A
   Brown, A
   McKay, CP
AF Hajigholi, M.
   Bertilsson, A.
   Brown, A.
   McKay, C. P.
TI The Seasonal Behavior of Ice in Craters at the Martian Northern Polar
   Region
SO PALEONTOLOGICAL JOURNAL
LA English
DT Meeting Abstract
C1 [Hajigholi, M.; Bertilsson, A.] Lulea Univ Technol, S-97187 Lulea, Sweden.
   [Brown, A.] SETI Inst, Mountain View, CA 94043 USA.
   [McKay, C. P.] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
EM mitra.hajigholi@gmail.com
NR 6
TC 0
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U1 0
U2 2
PU MAIK NAUKA/INTERPERIODICA/SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013-1578 USA
SN 0031-0301
EI 1555-6174
J9 PALEONTOL J+
JI Paleontol. J.
PD DEC
PY 2012
VL 46
IS 9
BP 1084
EP 1084
PG 1
WC Paleontology
SC Paleontology
GA 077SG
UT WOS:000314047500047
ER

PT J
AU Weeks, S
   Werdell, PJ
   Schaffelke, B
   Canto, M
   Lee, Z
   Wilding, JG
   Feldman, GC
AF Weeks, Scarla
   Werdell, P. Jeremy
   Schaffelke, Britta
   Canto, Marites
   Lee, Zhongping
   Wilding, John G.
   Feldman, Gene C.
TI Satellite-Derived Photic Depth on the Great Barrier Reef:
   Spatio-Temporal Patterns of Water Clarity
SO REMOTE SENSING
LA English
DT Article
DE water clarity; photic depth; Secchi depth; satellite; Great Barrier
   Reef; spatio-temporal patterns; biophysical processes
ID OCEAN COLOR OBSERVATIONS; MULTISENSOR APPROACH; CORAL SEA; LAGOON;
   PRODUCTS; ECOLOGY; MONSOON; RUNOFF; REGION; DRIVER
AB Detecting changes to the transparency of the water column is critical for understanding the responses of marine organisms, such as corals, to light availability. Long-term patterns in water transparency determine geographical and depth distributions, while acute reductions cause short-term stress, potentially mortality and may increase the organisms' vulnerability to other environmental stressors. Here, we investigated the optimal, operational algorithm for light attenuation through the water column across the scale of the Great Barrier Reef (GBR), Australia. We implemented and tested a quasi-analytical algorithm to determine the photic depth in GBR waters and matched regional Secchi depth (ZSD) data to MODIS-Aqua (2002-2010) and SeaWiFS (1997-2010) satellite data. The results of the in situ ZSD/satellite data matchup showed a simple bias offset between the in situ and satellite retrievals. Using a Type II linear regression of log-transformed satellite and in situ data, we estimated ZSD and implemented the validated ZSD algorithm to generate a decadal satellite time series (2002-2012) for the GBR. Water clarity varied significantly in space and time. Seasonal effects were distinct, with lower values during the austral summer, most likely due to river runoff and increased vertical mixing, and a decline in water clarity between 2008-2012, reflecting a prevailing La Nina weather pattern. The decline in water clarity was most pronounced in the inshore area, where a significant decrease in mean inner shelf ZSD of 2.1 m (from 8.3 m to 6.2 m) occurred over the decade. Empirical Orthogonal Function Analysis determined the dominance of Mode 1 (51.3%), with the greatest variation in water clarity along the mid-shelf, reflecting the strong influence of oceanic intrusions on the spatio-temporal patterns of water clarity. The newly developed photic depth product has many potential applications for the GBR from water quality monitoring to analyses of ecosystem responses to changes in water clarity.
C1 [Weeks, Scarla; Canto, Marites] Univ Queensland, Sch Geog Planning & Environm Management, Biophys Oceanog Grp, Brisbane, Qld 4072, Australia.
   [Werdell, P. Jeremy; Wilding, John G.; Feldman, Gene C.] NASA, Goddard Space Flight Ctr, Ocean Biol Proc Grp, Greenbelt, MD 20771 USA.
   [Schaffelke, Britta] Australian Inst Marine Sci, Townsville, Qld 4810, Australia.
   [Lee, Zhongping] Univ Massachusetts, Dept Environm Earth & Ocean Sci, Boston, MA 02125 USA.
RP Weeks, S (reprint author), Univ Queensland, Sch Geog Planning & Environm Management, Biophys Oceanog Grp, Brisbane, Qld 4072, Australia.
EM s.weeks@uq.edu.au; jeremy.werdell@nasa.gov; b.schaffelke@aims.gov.au;
   m.canto@uq.edu.au; zhongping.lee@umb.edu; john.g.wilding@nasa.gov;
   gene.c.feldman@nasa.gov
RI Weeks, Scarla/E-8632-2013; Werdell, Jeremy/D-8265-2012
OI Weeks, Scarla/0000-0002-0579-7069; 
FU Australian Research Council [LP100100342]; Great Barrier Reef
   Foundation; NASA Energy and Water Cycle Program [NNX09AV97G]
FX We thank the NASA Ocean Biology Processing Group for assistance with the
   large volume of data processing and the development of the web-based
   validation search/display utility. Special thanks to B. Franz, S.
   Bailey, and C. Proctor for implementation of the Secchi depth algorithm
   into the SeaDAS environment and also to Bruce Monger for kindly
   providing his EOF code. The Australian Institute of Marine Science
   (www.aims.gov.au) and the Queensland Department of Primary Industries
   and Fisheries (now Queensland Department of Agriculture, Fisheries and
   Forestry, www.daff.qld.gov.au) are gratefully acknowledged for provision
   of in situ Secchi depth data. This research was funded by the Australian
   Research Council (Project LP100100342) and the Great Barrier Reef
   Foundation. Z.P. Lee was partially supported by the NASA Energy and
   Water Cycle Program (#NNX09AV97G).
NR 34
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U2 37
PU MDPI AG
PI BASEL
PA POSTFACH, CH-4005 BASEL, SWITZERLAND
SN 2072-4292
J9 REMOTE SENS-BASEL
JI Remote Sens.
PD DEC
PY 2012
VL 4
IS 12
BP 3781
EP 3795
DI 10.3390/rs4123781
PG 15
WC Remote Sensing
SC Remote Sensing
GA 075VI
UT WOS:000313914800007
ER

PT J
AU Torres-Perez, JL
   Guild, LS
   Armstrong, RA
AF Torres-Perez, Juan L.
   Guild, Liane S.
   Armstrong, Roy A.
TI Hyperspectral Distinction of Two Caribbean Shallow-Water Corals Based on
   Their Pigments and Corresponding Reflectance
SO REMOTE SENSING
LA English
DT Article
DE Caribbean corals; pigments; HPLC; reflectance; derivative analysis;
   spectral analysis
ID DERIVATIVE ANALYSIS; PHOTOSYNTHETIC PIGMENTS; SPECTRAL REFLECTANCE;
   MARINE-PHYTOPLANKTON; REEF CORALS; ABSORPTION; CHLOROPHYLLS;
   CAROTENOIDS; DIVERSITY; FEATURES
AB The coloration of tropical reef corals is mainly due to their association with photosynthetic dinoflagellates commonly known as zooxanthellae. Combining High Performance Liquid Chromatography (HPLC), spectroscopy and derivative analysis we provide a novel approach to discriminate between the Caribbean shallow-water corals Acropora cervicornis and Porites porites based on their associated pigments. To the best of our knowledge, this is the first time that the total array of pigments found within the coral holobiont is reported. A total of 20 different pigments were identified including chlorophylls, carotenes and xanthophylls. Of these, eleven pigments were common to both species, eight were present only in A. cervicornis, and three were present only in P. porites. Given that these corals are living in similar physical conditions, we hypothesize that this pigment composition difference is likely a consequence of harboring different zooxanthellae clades with a possible influence of endolithic green or brown algae. We tested the effect of this difference in pigments on the reflectance spectra of both species. An important outcome was the correlation of total pigment concentration with coral reflectance spectra up to a 97% confidence level. Derivative analysis of the reflectance curves showed particular differences between species at wavelengths where several chlorophylls, carotenes and xanthophylls absorb. Within species variability of spectral features was not significant while interspecies variability was highly significant. We recognize that the detection of such differences with actual airborne or satellite remote sensors is extremely difficult. Nonetheless, based on our results, the combination of these techniques (HPLC, spectroscopy and derivative analysis) can be used as a robust approach for the development of a site specific spectral library for the identification of shallow-water coral species. Studies (Torres-Perez, NASA Postdoctoral Program) are currently underway to further apply this approach to other Caribbean benthic coral reef features. The data will be used with planned and future airborne and satellite studies of the site and for algorithm development to advance the use of future airborne and satellite instrument capabilities (NASA PRISM and HyspIRI) for discrimination of coral reef benthic composition.
C1 [Torres-Perez, Juan L.] NASA, Ames Res Ctr, Postdoctoral Program, Moffett Field, CA 94035 USA.
   [Guild, Liane S.] NASA, Ames Res Ctr, Div Earth Sci, Moffett Field, CA 94035 USA.
   [Armstrong, Roy A.] Univ Puerto Rico, Dept Marine Sci, Bioopt Oceanog Lab, Mayaguez, PR 00680 USA.
RP Torres-Perez, JL (reprint author), NASA, Ames Res Ctr, Postdoctoral Program, MS 245-4,Bldg 245,Rm 120,POB 1, Moffett Field, CA 94035 USA.
EM juan.l.torresperez@nasa.gov; liane.s.guild@nasa.gov;
   roy.armstrong@upr.edu
FU NASA Postdoctoral Program at the NASA Ames Research Center in California
FX We would like to thank Jorge Corredor, Director of the Marine Chemistry
   Laboratory of the UPR-DMS, and Rocio Garcia and Oswaldo Cardenas for
   helping with the spectrophotometric and HPLC analysis. Anabella Zuluaga
   helped with the statistical analysis of the data. The comments of four
   anonymous reviewers significantly improved the final version of this
   manuscript. JL Torres-Perez is currently supported by the NASA
   Postdoctoral Program at the NASA Ames Research Center in California.
NR 50
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U1 0
U2 34
PU MDPI AG
PI BASEL
PA POSTFACH, CH-4005 BASEL, SWITZERLAND
SN 2072-4292
J9 REMOTE SENS-BASEL
JI Remote Sens.
PD DEC
PY 2012
VL 4
IS 12
BP 3813
EP 3832
DI 10.3390/rs4123813
PG 20
WC Remote Sensing
SC Remote Sensing
GA 075VI
UT WOS:000313914800009
ER

PT J
AU Wolf, JA
   Fricker, GA
   Meyer, V
   Hubbell, SP
   Gillespie, TW
   Saatchi, SS
AF Wolf, Jeffrey A.
   Fricker, Geoffrey A.
   Meyer, Victoria
   Hubbell, Stephen P.
   Gillespie, Thomas W.
   Saatchi, Sassan S.
TI Plant Species Richness is Associated with Canopy Height and Topography
   in a Neotropical Forest
SO REMOTE SENSING
LA English
DT Article
DE species richness; lidar; Barro Colorado Island; canopy height;
   topography
ID TROPICAL FOREST; HABITAT ASSOCIATIONS; FLORISTIC COMPOSITION; DIVERSITY;
   SENSITIVITY; COMMUNITY; GRADIENTS; TREES; GAPS
AB Most plant species are non-randomly distributed across environmental gradients in light, water, and nutrients. In tropical forests, these gradients result from biophysical processes related to the structure of the canopy and terrain, but how does species richness in tropical forests vary over such gradients, and can remote sensing capture this variation? Using airborne lidar, we tested the extent to which variation in tree species richness is statistically explained by lidar-measured structural variation in canopy height and terrain in the extensively studied, stem-mapped 50-ha plot on Barro Colorado Island (BCI), Panama. We detected differences in species richness associated with variation in canopy height and topography across spatial scales ranging from 0.01-ha to 1.0-ha. However, species richness was most strongly associated with structural variation at the 1.0-ha scale. We developed a predictive generalized least squares model of species richness at the 1.0-ha scale (R-2 = 0.479, RMSE = 8.3 species) using the mean and standard deviation of canopy height, mean elevation, and terrain curvature. The model demonstrates that lidar-derived measures of forest and terrain structure can capture a significant fraction of observed variation in tree species richness in tropical forests on local-scales.
C1 [Wolf, Jeffrey A.; Hubbell, Stephen P.] Univ Calif Los Angeles, Dept Ecol & Evolutionary Biol, Los Angeles, CA 90095 USA.
   [Fricker, Geoffrey A.; Gillespie, Thomas W.] Univ Calif Los Angeles, Dept Geog, Los Angeles, CA 90095 USA.
   [Meyer, Victoria; Saatchi, Sassan S.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
   [Hubbell, Stephen P.] Smithsonian Trop Res Inst, Ctr Trop Forest Sci, Balboa, Panama.
RP Wolf, JA (reprint author), Univ Calif Los Angeles, Dept Ecol & Evolutionary Biol, Los Angeles, CA 90095 USA.
EM wolfjeff@ucla.edu; africker@ucla.edu; vic.meyer@gmail.com;
   shubbell@eeb.ucla.edu; tg@geog.ucla.edu; sassan.s.saatchi@jpl.nasa.gov
FU Smithsonian Tropical Research Institute; National Science Foundation
   [DEB-0939907, DEB-0640386, DEB-0425651, DEB-0346488, DEB-0129874,
   DEB-00753102, DEB-9909347, DEB-9615226, DEB-9405933, DEB-9221033,
   DEB-9100058, DEB-8906869, DEB-8605042, DEB-8206992, DEB-7922197]; Center
   for Tropical Forest Science; John D. and Catherine T. MacArthur
   Foundation; Mellon Foundation; Small World Institute Fund; Department of
   Ecology and Evolutionary Biology, UCLA; Scholarly Studies Grant from the
   Smithsonian Institution; National Science Foundation Dimensions of
   Biodiversity grant [1050680]
FX We thank Brant Faircloth, Jim Dalling, Abigail Curtis, and three
   anonymous reviewers for constructive criticism on this paper. The lidar
   data collection was made possible with financial support from
   Smithsonian Tropical Research Institute and National Science Foundation
   (DEB-0939907) to Jim Dalling. The BCI forest dynamics research project
   was made possible by National Science Foundation grants to Stephen P.
   Hubbell: DEB-0640386, DEB-0425651, DEB-0346488, DEB-0129874,
   DEB-00753102, DEB-9909347, DEB-9615226, DEB-9615226, DEB-9405933,
   DEB-9221033, DEB-9100058, DEB-8906869, DEB-8605042, DEB-8206992,
   DEB-7922197, support from the Center for Tropical Forest Science, the
   Smithsonian Tropical Research Institute, the John D. and Catherine T.
   MacArthur Foundation, the Mellon Foundation, the Small World Institute
   Fund, and numerous private individuals, and through the hard work of
   over 100 people from 10 countries over the past two decades. The plot
   project is part the Center for Tropical Forest Science, a global network
   of large-scale demographic tree plots. Jeffrey Wolf was financially
   supported by fellowships from the Department of Ecology and Evolutionary
   Biology, UCLA while writing this paper and developed ideas for this
   paper while working on a project funded by a Scholarly Studies Grant
   from the Smithsonian Institution to Stephen P. Hubbell and Brant
   Faircloth. This research was also supported by a Graduate Distributed
   Seminar Series made possible by a National Science Foundation Dimensions
   of Biodiversity grant (1050680) to Sandy Andelman and Julia Parish.
NR 33
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U1 1
U2 39
PU MDPI AG
PI BASEL
PA POSTFACH, CH-4005 BASEL, SWITZERLAND
SN 2072-4292
J9 REMOTE SENS-BASEL
JI Remote Sens.
PD DEC
PY 2012
VL 4
IS 12
BP 4010
EP 4021
DI 10.3390/rs4124010
PG 12
WC Remote Sensing
SC Remote Sensing
GA 075VI
UT WOS:000313914800018
ER

PT J
AU Ponchak, GE
AF Ponchak, George E.
TI Special issue on 2012 internationla microwave symposium
SO IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
LA English
DT Editorial Material
C1 NASA, Glenn Res Ctr, Cleveland, OH 44135 USA.
RP Ponchak, GE (reprint author), NASA, Glenn Res Ctr, Cleveland, OH 44135 USA.
NR 0
TC 0
Z9 0
U1 0
U2 2
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9480
J9 IEEE T MICROW THEORY
JI IEEE Trans. Microw. Theory Tech.
PD DEC
PY 2012
VL 60
IS 12
SI SI
BP 3892
EP 3892
DI 10.1109/TMTT.2012.2225512
PN 2
PG 1
WC Engineering, Electrical & Electronic
SC Engineering
GA 062CK
UT WOS:000312896500001
ER

PT J
AU Tang, A
   Murphy, D
   Hsiao, F
   Virbila, G
   Wang, YH
   Wu, H
   Kim, Y
   Chang, MCF
AF Tang, Adrian
   Murphy, David
   Hsiao, Frank
   Virbila, Gabriel
   Wang, Yen-Hsiang
   Wu, Hao
   Kim, Yanghyo
   Chang, Mau-Chung Frank
TI A D-Band CMOS Transmitter With IF-Envelope Feed-Forward Pre-Distortion
   and Injection-Locked Frequency-Tripling Synthesizer
SO IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
LA English
DT Article; Proceedings Paper
CT IEEE Radio Frequency Integrated Circuits (RFIC) Symposium in Conjunction
   with the IEEE MTT-S International Microwave Symposium (IMS) / Microwave
   Week
CY JUN 17-19, 2012
CL Montreal, CANADA
SP IEEE, IEEE MTT S
DE D-band transmitter; digital-controlled millimeter wave; feed-forward
   linearization; on-chip antenna
AB A D-band CMOS transmitter is presented with an integrated injection-locked frequency-tripling synthesizer, digital control, and an on-chip antenna. It employs an IF feed-forward pre-distortion scheme, which improves gain compression of the transmitter to provide an overall higher linearity gain profile, allowing reduced power back-off for higher peak-to-average modulation schemes. The integrated D-band transmitter consumes 347 mW and occupies 1800 1500 mu m of silicon area. The proposed transmitter delivers 0.4 dBm of effective isotropic radiated power with a saturated power on-chip of at least 12.2 dBm. The transmitter has a peak power-added efficiency (PAE) of 4.8% with power delivered to the antenna and a peak PAE of 0.31% when considering radiated power.
C1 [Tang, Adrian; Hsiao, Frank; Virbila, Gabriel; Wang, Yen-Hsiang; Wu, Hao; Kim, Yanghyo; Chang, Mau-Chung Frank] Univ Calif Los Angeles, Dept Elect Engn, Los Angeles, CA 90001 USA.
   [Murphy, David] Broadcom Corp, Irvine, CA 92602 USA.
RP Tang, A (reprint author), CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
NR 12
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U1 0
U2 3
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9480
EI 1557-9670
J9 IEEE T MICROW THEORY
JI IEEE Trans. Microw. Theory Tech.
PD DEC
PY 2012
VL 60
IS 12
SI SI
BP 4129
EP 4137
DI 10.1109/TMTT.2012.2222916
PN 2
PG 9
WC Engineering, Electrical & Electronic
SC Engineering
GA 062CK
UT WOS:000312896500024
ER

PT J
AU Le Mouelic, S
   Cornet, T
   Rodriguez, S
   Sotin, C
   Barnes, JW
   Baines, KH
   Brown, RH
   Lefevre, A
   Buratti, BJ
   Clark, RN
   Nicholson, PD
AF Le Mouelic, Stephane
   Cornet, Thomas
   Rodriguez, Sebastien
   Sotin, Christophe
   Barnes, Jason W.
   Baines, Kevin H.
   Brown, Robert H.
   Lefevre, Axel
   Buratti, Bonnie J.
   Clark, Roger N.
   Nicholson, Philip D.
TI Global mapping of Titan's surface using an empirical processing method
   for the atmospheric and photometric correction of Cassini/VIMS images
SO PLANETARY AND SPACE SCIENCE
LA English
DT Article
DE Titan; Surface; Infrared; Cassini; VIMS; Hyperspectral
ID ONTARIO LACUS; VIMS
AB We have processed all images of Titan's surface acquired by the Visual and Infrared Mapping Spectrometer between 2004 and 2010, with the objective of producing seamless global mosaics of the surface in the six infrared atmospheric windows at 1.08, 1.27, 1.59, 2.03, 2.6-2.7 and 5 mu m. A systematic study of the photometry at 5 mu m, where haze scattering can be neglected, shows that the surface behaves to first order like a Lambert surface. The results at 5 mu m are generalized to lower wavelengths, adding an empirical correction accounting for scattering from atmospheric aerosols, using methane band wings as a proxy for the calculation of the scattering additive term. Mosaics incorporating this empirical correction for the geometry and haze scattering show significantly less seams than any previous maps integrating data acquired over such a wide range of observing geometries, and may therefore be used for the study of surface properties. We provide several suggestions for further studies aimed at improving the global mapping of the surface of Titan. With the considered thresholds limits on the acquisition parameters, we found that 13% of Titan's surface has been mapped at an instrument resolution better than 10 km/pixel, 56% of the surface was seen at a resolution between 10 and 20 km/pixel, and 24% of the coverage falls in the range 20-50 km/pixel. (C) 2012 Elsevier Ltd. All rights reserved.
C1 [Le Mouelic, Stephane; Cornet, Thomas; Sotin, Christophe; Lefevre, Axel] Univ Nantes, Lab Planetol & Geodynam Nantes, CNRS, UMR 6112, F-44322 Nantes 3, France.
   [Rodriguez, Sebastien] Univ Paris 07, Lab AIM, CNRS, CEA,Ctr Orne Merisiers, F-91191 Gif Sur Yvette, France.
   [Sotin, Christophe; Baines, Kevin H.; Buratti, Bonnie J.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
   [Barnes, Jason W.] Univ Idaho, Dept Phys, Moscow, ID 83844 USA.
   [Brown, Robert H.] Univ Arizona, Dept Planetary Sci, Tucson, AZ 85721 USA.
   [Brown, Robert H.] Univ Arizona, Dept Astron, Tucson, AZ USA.
   [Clark, Roger N.] US Geol Survey, Denver, CO 80225 USA.
   [Nicholson, Philip D.] Cornell Univ, Dept Astron, Ithaca, NY 14853 USA.
RP Le Mouelic, S (reprint author), Univ Nantes, Lab Planetol & Geodynam Nantes, CNRS, UMR 6112, 2 Rue Houssiniere,BP 92208, F-44322 Nantes 3, France.
EM stephane.lemouelic@univ-nantes.fr
RI Barnes, Jason/B-1284-2009; Rodriguez, Sebastien/H-5902-2016
OI Barnes, Jason/0000-0002-7755-3530; Rodriguez,
   Sebastien/0000-0003-1219-0641
FU Centre National de la Recherche Scientifique (CNRS); Centre National
   d'Etudes Spatiales (CNES); ANR (project APOSTIC)
FX Authors are very grateful to two anonymous reviewers for their detailed
   review and very constructive comments on the original manuscript. This
   work benefited from financial supports from the Centre National de la
   Recherche Scientifique (CNRS), the Centre National d'Etudes Spatiales
   (CNES) and from the ANR (project APOSTIC).
NR 37
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U1 0
U2 7
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0032-0633
J9 PLANET SPACE SCI
JI Planet Space Sci.
PD DEC
PY 2012
VL 73
IS 1
BP 178
EP 190
DI 10.1016/j.pss.2012.09.008
PG 13
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 077DF
UT WOS:000314007400027
ER

PT J
AU Mahaney, WC
   Fairen, AG
   Dohm, JM
   Krinsley, DH
AF Mahaney, W. C.
   Fairen, Alberto G.
   Dohm, James M.
   Krinsley, D. H.
TI Weathering rinds on clasts: Examples from Earth and Mars as short and
   long term recorders of paleoenvironment
SO PLANETARY AND SPACE SCIENCE
LA English
DT Article
DE Weathering rinds on Earth and Mars; Simulated 'wetting fronts'
   correlated with paleosols; Paleoenvironmental reconstruction from clast
   rind alteration
ID CENTRAL TETON RANGE; NEW-ZEALAND; SIERRA-NEVADA; EAST-AFRICA; ROCK;
   RATES; SEQUENCE; BASALT; METEORITES; FLORISTICS
AB Weathering rinds on clasts of different lithologic species are an underappreciated inventory of paleoenvironmental information and, as recorders of long term exposure to the subaerial atmosphere and in some cases to burial and influx of groundwater followed by exhumation, they provide logged information over varying planetary time spans. Whereas weathered coatings of nanometer thickness have been explored by numerous workers, rinds in cold environments have not received much attention except as relative-age indicators. Rinds in terrestrial materials in certain circumstances may reveal weathering trends over time, snapshots often extending back millions of years and containing weathering zones not unlike horizons in paleosols. Wetting 'fronts' in rinds on coarse clastic debris (i.e. boulder, cobble, and pebble grade size material) are similar to wetting 'depths' in similar chemically-energized paleosols resident in moraines or mass wasted debris. Even considering erosion along terrestrial clast surfaces, new data reveal variations in primary mineral alteration, development of secondary mineral complexes, embedded pollen, fossil microbes, and various internal distributions of Fe oxides. Similar long-range recorders of paleoenvironment deduced from meteorites analyzed by the Opportunity rover on Meridiani Planum provide evidence of weathering over a similar to Gy time frame in the humid Noachian paleoenvironment of Early Mars followed by subsequent burial and later exhumation. Despite lithological variations between different sets of clasts-terrestrial and Martian-the retention of rinds as paleoweathering recorders over long and short time frames illustrates their value in paleoenvironmental reconstruction. (C) 2012 Elsevier Ltd. All rights reserved.
C1 [Mahaney, W. C.] Quaternary Surveys, Thornhill, ON L4J1J4, Canada.
   [Fairen, Alberto G.] SETI Inst, Mountain View, CA 94043 USA.
   [Fairen, Alberto G.] NASA, Ames Res Ctr, Space Sci & Astrobiol Div, Moffett Field, CA 94035 USA.
   [Dohm, James M.] Univ Arizona, Dept Hydrol & Water Resources, Tucson, AZ 85721 USA.
   [Krinsley, D. H.] Univ Oregon, Dept Geol Sci, Eugene, OR 97403 USA.
RP Mahaney, WC (reprint author), Quaternary Surveys, 26 Thornhill Ave, Thornhill, ON L4J1J4, Canada.
EM arkose@rogers.com
RI Dohm, James/A-3831-2014
FU Quaternary Surveys, Toronto
FX This research was supported by Quaternary Surveys, Toronto. We thank J.
   Ditto (CAMCOR, University of Oregon) for imaging samples in Figs. 3B,
   4B, 5B, C and 6B. We appreciate a review of the final draft ms by Vic
   Baker (University of Arizona, Tucson).
NR 62
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U1 2
U2 15
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0032-0633
J9 PLANET SPACE SCI
JI Planet Space Sci.
PD DEC
PY 2012
VL 73
IS 1
BP 243
EP 253
DI 10.1016/j.pss.2012.08.025
PG 11
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 077DF
UT WOS:000314007400033
ER

PT J
AU Roatsch, T
   Kersten, E
   Matz, KD
   Preusker, F
   Scholten, F
   Jaumann, R
   Raymond, CA
   Russell, CT
AF Roatsch, Th.
   Kersten, E.
   Matz, K. -D.
   Preusker, F.
   Scholten, F.
   Jaumann, R.
   Raymond, C. A.
   Russell, C. T.
TI High resolution Vesta High Altitude Mapping Orbit (HAMO) Atlas derived
   from Dawn framing camera images
SO PLANETARY AND SPACE SCIENCE
LA English
DT Article
DE Dawn; Vesta; Asteroids; Planetary mapping
AB The Dawn framing camera (FC) acquired about 2500 clear filter images of Vesta with a resolution of about 70 m/pixels during the High Altitude Mapping Orbit (HAMO) in fall 2011. We ortho-rectified these images and produced a global high resolution controlled mosaic of Vesta. This global mosaic is the baseline for a high resolution Vesta atlas that consists of 15 tiles mapped at a scale of 1:500,000. The nomenclature used in this atlas was proposed by the Dawn team and was approved by the International Astronomical Union (IAU). The whole atlas is available to the public through the Dawn GIS web page [http://dawn_gis.dlr.de/atlas]. (C) 2012 Elsevier Ltd. All rights reserved.
C1 [Roatsch, Th.; Kersten, E.; Matz, K. -D.; Preusker, F.; Scholten, F.; Jaumann, R.] German Aerosp Ctr DLR, Inst Planetary Res, Berlin, Germany.
   [Raymond, C. A.] CALTECH, Jet Prop Lab, Pasadena, CA USA.
   [Russell, C. T.] Univ Calif Los Angeles, Inst Geophys, Los Angeles, CA USA.
RP Roatsch, T (reprint author), German Aerosp Ctr DLR, Inst Planetary Res, Berlin, Germany.
EM Thomas.Roatsch@dlr.de
NR 7
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U1 0
U2 8
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0032-0633
J9 PLANET SPACE SCI
JI Planet Space Sci.
PD DEC
PY 2012
VL 73
IS 1
BP 283
EP 286
DI 10.1016/j.pss.2012.08.021
PG 4
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 077DF
UT WOS:000314007400037
ER

PT J
AU Smith, SM
   McCoy, T
   Gazda, D
   Morgan, JLL
   Heer, M
   Zwart, SR
AF Smith, Scott M.
   McCoy, Torin
   Gazda, Daniel
   Morgan, Jennifer L. L.
   Heer, Martina
   Zwart, Sara R.
TI Space Flight Calcium: Implications for Astronaut Health, Spacecraft
   Operations, and Earth
SO NUTRIENTS
LA English
DT Review
DE bed rest; bone; calcium; collagen crosslinks; dual-energy X-ray
   absorptiometry; space flight
ID INDUCED BONE LOSS; RENAL STONE RISK; BODY NEGATIVE-PRESSURE; RESISTIVE
   VIBRATION EXERCISE; LONG-DURATION SPACEFLIGHT; PROLONGED BED REST;
   ACID-BASE-BALANCE; TREADMILL EXERCISE; URINARY CALCIUM; RESISTANCE
   EXERCISE
AB The space flight environment is known to induce bone loss and, subsequently, calcium loss. The longer the mission, generally the more bone and calcium are lost. This review provides a history of bone and calcium studies related to space flight and highlights issues related to calcium excretion that the space program must consider so that urine can be recycled. It also discusses a novel technique using natural stable isotopes of calcium that will be helpful in the future to determine calcium and bone balance during space flight.
C1 [Smith, Scott M.; McCoy, Torin] NASA, Human Hlth & Performance Directorate, Lyndon B Johnson Space Ctr, Houston, TX 77058 USA.
   [Gazda, Daniel] Wyle Sci Technol & Engn Grp, Houston, TX 77058 USA.
   [Morgan, Jennifer L. L.] Oak Ridge Associated Univ, Oak Ridge, TN 37831 USA.
   [Heer, Martina] Profil Inst Stoffwechselforsch GmbH, D-41460 Neuss, Germany.
   [Heer, Martina] Univ Bonn, D-53115 Bonn, Germany.
   [Zwart, Sara R.] Univ Space Res Assoc, Div Space Life Sci, Houston, TX 77058 USA.
RP Smith, SM (reprint author), NASA, Human Hlth & Performance Directorate, Lyndon B Johnson Space Ctr, Houston, TX 77058 USA.
EM scott.m.smith@nasa.gov; torin.mccoy-1@nasa.gov; daniel.b.gazda@nasa.gov;
   jennifer.morgan@nasa.gov; martina.heer@profil.com; sara.zwart-1@nasa.gov
NR 114
TC 10
Z9 12
U1 2
U2 15
PU MDPI AG
PI BASEL
PA POSTFACH, CH-4005 BASEL, SWITZERLAND
SN 2072-6643
J9 NUTRIENTS
JI Nutrients
PD DEC
PY 2012
VL 4
IS 12
BP 2047
EP 2068
DI 10.3390/nu4122047
PG 22
WC Nutrition & Dietetics
SC Nutrition & Dietetics
GA 060KO
UT WOS:000312776900015
PM 23250146
ER

PT J
AU Linnarsson, D
   Carpenter, J
   Fubini, B
   Gerde, P
   Karlsson, LL
   Loftus, DJ
   Prisk, GK
   Staufer, U
   Tranfield, EM
   van Westrenen, W
AF Linnarsson, Dag
   Carpenter, James
   Fubini, Bice
   Gerde, Per
   Karlsson, Lars L.
   Loftus, David J.
   Prisk, G. Kim
   Staufer, Urs
   Tranfield, Erin M.
   van Westrenen, Wim
TI Toxicity of lunar dust
SO PLANETARY AND SPACE SCIENCE
LA English
DT Article; Proceedings Paper
CT Workshop on Scientific Preparations for Lunar Exploration
CY FEB 06-07, 2012
CL ESA, ESTEC, Noordwijk, NETHERLANDS
HO ESA, ESTEC
DE Human exploration; Health effects; Particle toxicology; Inflammation;
   Surface reactivity; Moon
ID PARTICULATE AIR-POLLUTION; EXHALED NITRIC-OXIDE; FRESHLY FRACTURED
   SILICA; ULTRAFINE PARTICLES; PULMONARY TOXICITY; INTRATRACHEAL
   INSTILLATION; MYOCARDIAL-INFARCTION; INHALATION EXPOSURE; CRYSTALLINE
   SILICA; RESPIRABLE FIBERS
AB The formation, composition and physical properties of lunar dust are incompletely characterised with regard to human health. While the physical and chemical determinants of dust toxicity for materials such as asbestos, quartz, volcanic ashes and urban particulate matter have been the focus of substantial research efforts, lunar dust properties, and therefore lunar dust toxicity may differ substantially. In this contribution, past and ongoing work on dust toxicity is reviewed, and major knowledge gaps that prevent an accurate assessment of lunar dust toxicity are identified. Finally, a range of studies using ground-based, low-gravity, and in situ measurements is recommended to address the identified knowledge gaps. Because none of the curated lunar samples exist in a pristine state that preserves the surface reactive chemical aspects thought to be present on the lunar surface, studies using this material carry with them considerable uncertainty in terms of fidelity. As a consequence, in situ data on lunar dust properties will be required to provide ground truth for ground-based studies quantifying the toxicity of dust exposure and the associated health risks during future manned lunar missions. (C) 2012 Elsevier Ltd. All rights reserved.
C1 [Linnarsson, Dag; Karlsson, Lars L.] Karolinska Inst, Dept Physiol & Pharmacol, Sect Environm Physiol, S-17177 Stockholm, Sweden.
   [Carpenter, James] HME HFR, European Space Agcy ESTEC, NL-2200 AG Noordwijk, Netherlands.
   [Fubini, Bice] Univ Turin, Dept Chem, I-10125 Turin, Italy.
   [Fubini, Bice] Univ Turin, Interdept Ctr G Scansetti Studies Asbestos & Othe, I-10125 Turin, Italy.
   [Gerde, Per] Karolinska Inst, IMM, Natl Inst Environm Med, Div Physiol, S-17177 Stockholm, Sweden.
   [Gerde, Per] Inhalat Sci Sweden AB, S-17177 Stockholm, Sweden.
   [Loftus, David J.] NASA, Ames Res Ctr, Space Biosci Div, Moffett Field, CA 94301 USA.
   [Prisk, G. Kim] Univ Calif San Diego, Dept Med, La Jolla, CA 92093 USA.
   [Prisk, G. Kim] Univ Calif San Diego, Dept Radiol, La Jolla, CA 92093 USA.
   [Staufer, Urs] Delft Univ Technol, Micro & Nano Engn Lab, NL-2628 GR Delft, Netherlands.
   [Tranfield, Erin M.] European Mol Biol Lab, Cell Biol & Biophys Unit, D-69117 Heidelberg, Germany.
   [van Westrenen, Wim] Vrije Univ Amsterdam, Fac Earth & Life Sci, NL-1081 HV Amsterdam, Netherlands.
RP van Westrenen, W (reprint author), Vrije Univ Amsterdam, Fac Earth & Life Sci, De Boelelaan 1085, NL-1081 HV Amsterdam, Netherlands.
EM dag.linnarsson@ki.se; james.carpenter@esa.int; bice.fubini@unito.it;
   per.gerde@ki.se; lars.karlsson@ki.se; david.j.loftus@nasa.gov;
   kprisk@ucsd.edu; u.staufer@tudelft.nl; erin.tranfield@embl.de;
   w.van.westrenen@vu.nl
RI Staufer, Urs/J-6866-2016; 
OI Staufer, Urs/0000-0002-3519-6467; Karlsson, Lars/0000-0003-2187-5124;
   Tranfield, Erin/0000-0002-1542-7459
NR 158
TC 15
Z9 16
U1 2
U2 31
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0032-0633
J9 PLANET SPACE SCI
JI Planet Space Sci.
PD DEC
PY 2012
VL 74
IS 1
SI SI
BP 57
EP 71
DI 10.1016/j.pss.2012.05.023
PG 15
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 068SD
UT WOS:000313385600006
ER

PT J
AU Gregnanin, M
   Bertotti, B
   Chersich, M
   Fermi, M
   Iess, L
   Simone, L
   Tortora, P
   Williams, JG
AF Gregnanin, M.
   Bertotti, B.
   Chersich, M.
   Fermi, M.
   Iess, L.
   Simone, L.
   Tortora, P.
   Williams, J. G.
TI Same beam interferometry as a tool for the investigation of the lunar
   interior
SO PLANETARY AND SPACE SCIENCE
LA English
DT Article; Proceedings Paper
CT Workshop on Scientific Preparations for Lunar Exploration
CY FEB 06-07, 2012
CL ESA, ESTEC, Noordwijk, NETHERLANDS
HO ESA, ESTEC
DE Same beam interferometry; Moon; Lander; Internal structure
AB Lunar Laser Ranging (LLR), by providing routine measurements of the distance to retro-reflector arrays on the lunar surface with centimeter accuracy, has allowed very accurate investigations of the Moon's orbital dynamics, including relativistic corrections. The lunar rotation, physical librations, and tidal deformation have also been investigated, providing new insight on the fluid core and the physical properties of the interior (Williams et al., 2006). A new laser ranging station is now operating with a precision of a few millimeters (Murphy et al., 2008). However, even with this improved accuracy, important details of the Moon's internal structure and physical properties may be missed.
   There are strong indications that significant dissipative processes are at play in the lunar interior; they could be due, in particular, to tides and to the presence of a fluid core, which rotates about a different axis than the mantle (Williams et al., 2006). Accurate measurements of the lunar orientation, together with radio science determinations of the gravity field, may reveal also interesting details about the Moon's geological past. The angular accuracy required to unravel the different effects is about 10(-10) rad, corresponding, for a baseline of 1000 km, to accuracy in differential distance of 0.1 mm.
   The present work is a follow-up of an earlier proposal (Bender, 1994) of a microwave interferometer: a network of three widely separated landers coherently and simultaneously tracked at Ka-band by a single antenna on the ground. The uplink signal will be separately sent back to the Earth by phase-stable transponders hosted by each lander; measurements of the differential phases will provide the differences between the three distances and will determine changes in the attitude and the tides of the Moon, with little sensitivity to the atmospheric delays. We present a technological assessment of this experimental configuration, known as Same Beam Interferometry (SBI), with emphasis on the technological challenges, weighted against the science benefits. Among the critical points of SBI operations with lunar landers, we mention the energy sources, and the issues related to the permanence of the transponders in the harsh lunar environment. Some operational scenarios are also analyzed.
   The recent advancement in the design of Ka-band transponders (e.g., in the BepiColombo mission) enables very accurate and stable phase measurements. The error budget presented in this paper shows that a single measurement provides an accuracy in the order of lambda/100=0.1 mm in the differential range of any lander pair with just 60 s integration time. (C) 2012 Elsevier Ltd. All rights reserved.
C1 [Gregnanin, M.; Iess, L.] Univ Roma La Sapienza, Dipartimento Ingn Meccan & Aerosp, I-00184 Rome, Italy.
   [Bertotti, B.] Univ Pavia, Dipartimento Fis Nucl & Teor, I-27100 Pavia, Italy.
   [Simone, L.] Thales Alenia Space Italia SpA, Rome, Italy.
   [Tortora, P.] Univ Bologna, Fac Ingn 2, Bologna, Italy.
   [Williams, J. G.] CALTECH, Jet Prop Lab, Pasadena, CA USA.
RP Gregnanin, M (reprint author), Univ Roma La Sapienza, Dipartimento Ingn Meccan & Aerosp, Via Eudossiana 18, I-00184 Rome, Italy.
EM marco.gregnanin@uniroma1.it
RI Tortora, Paolo/J-6191-2012; IESS, Luciano/F-4902-2011
OI Tortora, Paolo/0000-0001-9259-7673; IESS, Luciano/0000-0002-6230-5825
NR 10
TC 3
Z9 3
U1 0
U2 3
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0032-0633
J9 PLANET SPACE SCI
JI Planet Space Sci.
PD DEC
PY 2012
VL 74
IS 1
SI SI
BP 194
EP 201
DI 10.1016/j.pss.2012.08.027
PG 8
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 068SD
UT WOS:000313385600020
ER

PT J
AU Wright, IP
   Sheridan, S
   Morse, AD
   Barber, SJ
   Merrifield, JA
   Waugh, LJ
   Howe, CJ
   Gibson, EK
   Pillinger, CT
AF Wright, I. P.
   Sheridan, S.
   Morse, A. D.
   Barber, S. J.
   Merrifield, J. A.
   Waugh, L. J.
   Howe, C. J.
   Gibson, E. K.
   Pillinger, C. T.
TI L-VRAP-A lunar volatile resources analysis package for lunar exploration
SO PLANETARY AND SPACE SCIENCE
LA English
DT Article; Proceedings Paper
CT Workshop on Scientific Preparations for Lunar Exploration
CY FEB 06-07, 2012
CL ESA, ESTEC, Noordwijk, NETHERLANDS
HO ESA, ESTEC
DE Mass spectrometer; Lunar; ESA; Volatiles; Lunar lander
ID SOUTH-POLE; RADIOMETER OBSERVATIONS; BEAGLE-2 LANDER; ICE; DEPOSITS;
   RATIOS; WATER
AB The Lunar Volatile Resources Analysis Package (L-VRAP) has been conceived to deliver some of the objectives of the proposed Lunar Lander mission currently being studied by the European Space Agency. The purpose of the mission is to demonstrate and develop capability; the impetus is very much driven by a desire to lay the foundations for future human exploration of the Moon. Thus, L-VRAP has design goals that consider lunar volatiles from the perspective of both their innate scientific interest and also their potential for in situ utilisation as a resource. The device is a dual mass spectrometer system and is capable of meeting the requirements of the mission with respect to detection, quantification and characterisation of volatiles. Through the use of appropriate sampling techniques, volatiles from either the regolith or atmosphere (exosphere) can be analysed. Furthermore, since L-VRAP has the capacity to determine isotopic compositions, it should be possible for the instrument to determine the sources of the volatiles that are found on the Moon (be they lunar per se, extra-lunar, or contaminants imparted by the mission itself). (C) 2012 Elsevier Ltd. All rights reserved.
C1 [Wright, I. P.; Sheridan, S.; Morse, A. D.; Barber, S. J.; Pillinger, C. T.] Open Univ, Milton Keynes MK7 6AA, Bucks, England.
   [Merrifield, J. A.] Fluid Grav Engn, Emsworth PO10 7DX, England.
   [Waugh, L. J.] EADS Astrium Ltd, Stevenage SG1 2AS, Herts, England.
   [Howe, C. J.] RAL Space, Didcot OX11 0QX, Oxon, England.
   [Gibson, E. K.] NASA, JSC, Astromat Res Off, Houston, TX 77058 USA.
RP Sheridan, S (reprint author), Open Univ, Milton Keynes MK7 6AA, Bucks, England.
EM s.sheridan@open.ac.uk
NR 27
TC 1
Z9 1
U1 1
U2 4
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0032-0633
J9 PLANET SPACE SCI
JI Planet Space Sci.
PD DEC
PY 2012
VL 74
IS 1
SI SI
BP 254
EP 263
DI 10.1016/j.pss.2012.08.014
PG 10
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 068SD
UT WOS:000313385600025
ER

PT J
AU Martini, M
   Dell'Agnello, S
   Currie, D
   Delle Monache, G
   Vittori, R
   Chandler, JF
   Cantone, C
   Boni, A
   Berardi, S
   Patrizi, G
   Maiello, M
   Garattini, M
   Lops, C
   March, R
   Bellettini, G
   Tauraso, R
   Intaglietta, N
   Tibuzzi, M
   Murphy, TW
   Bianco, G
   Ciocci, E
AF Martini, M.
   Dell'Agnello, S.
   Currie, D.
   Delle Monache, G.
   Vittori, R.
   Chandler, J. F.
   Cantone, C.
   Boni, A.
   Berardi, S.
   Patrizi, G.
   Maiello, M.
   Garattini, M.
   Lops, C.
   March, R.
   Bellettini, G.
   Tauraso, R.
   Intaglietta, N.
   Tibuzzi, M.
   Murphy, T. W.
   Bianco, G.
   Ciocci, E.
TI MoonLIGHT: A USA-Italy lunar laser ranging retroreflector array for the
   21st century
SO PLANETARY AND SPACE SCIENCE
LA English
DT Article; Proceedings Paper
CT Workshop on Scientific Preparations for Lunar Exploration
CY FEB 06-07, 2012
CL ESA, ESTEC, Noordwijk, NETHERLANDS
HO ESA, ESTEC
DE Lunar laser ranging; Space test; Cube corner reflector; Laser
   technology; Test of geodetic precession
ID MOON
AB Since the 1970s Lunar Laser Ranging (LLR) to the Apollo Cube Comer Retroreflector (CCR) arrays (developed by the University of Maryland, UMD) have supplied significant tests of General Relativity: possible changes in the gravitational constant, gravitational self-energy, weak equivalence principle, geodetic precession, inverse-square force-law. LLR has also provided significant information on the composition and origin of the Moon. This is the only Apollo experiment still in operation. In the 1970s Apollo LLR arrays contributed a negligible fraction of the ranging error budget Since the ranging capabilities of ground stations improved by more than two orders of magnitude, now, because of the lunar librations, Apollo CCR arrays dominate the error budget With the project MoonLIGHT (Moon Laser Instrumentation for General relativity High-accuracy Tests), in 2006 INFN-LNF joined UMD in the development and test of a new-generation LLR payload made by a single, large CCR (100 mm diameter) unaffected by librations. In particular, INFN-LNF built and is operating a new experimental apparatus (Satellite/lunar laser ranging Characterization Facility, SCF) and created a new industry-standard test procedure (SCF-Test) to characterize and model the detailed thermal behavior and the optical performance of CCRs in laboratory-simulated space conditions, for industrial and scientific applications. Our key experimental innovation is the concurrent measurement and modeling of the optical Far Field Diffraction Pattern (FFDP) and the temperature distribution of retroreflector payloads under thermal conditions produced with a solar simulator. The apparatus includes infrared cameras for non-invasive thermometry, thermal control and real-time payload movement to simulate satellite orientation on orbit with respect to solar illumination and laser interrogation beams. These capabilities provide: unique prelaunch performance validation of the space segment of LLR/SLR (Satellite Laser Ranging): retroreflector design optimization to maximize ranging efficiency and signal-to-noise conditions in daylight Results of the SCF-Test of our CCR payload will be presented. Negotiations are underway to propose our payload and SCF-Test services for precision gravity and lunar science measurements with next robotic lunar landing missions. We will describe the addition of the CCR optical Wavefront Fizeau Interferogram (WE) concurrently to FFDP/temperature measurements in the framework of an ASI-INFN project, ETRUSCO-2. The main goals of the latter are: development of a standard GNSS (Global Navigation Satellite System) laser Retroreflector Army; a second SCF: SCF-Test of Galileo, GPS and other 'as-built' GNSS retroreflector payloads. Results on analysis of Apollo LLR data and search of new gravitational physics with LLR, Mercury Radar Ranging will be presented. (C) 2012 Elsevier Ltd. All rights reserved.
C1 [Martini, M.; Dell'Agnello, S.; Delle Monache, G.; Cantone, C.; Boni, A.; Berardi, S.; Patrizi, G.; Maiello, M.; Garattini, M.; Lops, C.; March, R.; Bellettini, G.; Tauraso, R.; Intaglietta, N.; Tibuzzi, M.; Ciocci, E.] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Rome, Italy.
   [Currie, D.] Univ Maryland UMD, College Pk, MD 20742 USA.
   [Currie, D.] NASA, Lunar Sci Inst, Washington, DC USA.
   [Vittori, R.] Aeronaut Mil Italiana, I-00185 Rome, Italy.
   [Chandler, J. F.] Harvard Smithsonian Ctr Astrophys CfA, Cambridge, MA 02138 USA.
   [Murphy, T. W.] Univ Calif San Diego, San Diego, CA 92103 USA.
   [Bianco, G.] Italian Space Agcy, Ctr Geodesia Spaziale G Colombo ASI CGS, I-75100 Matera, Italy.
RP Martini, M (reprint author), Ist Nazl Fis Nucl, Lab Nazl Frascati, Via Enrico Fermi 40, I-00044 Rome, Italy.
EM Manuele.Martini@Inf.infn.it
OI Bianco, Giuseppe/0000-0002-4538-6467; Tauraso,
   Roberto/0000-0002-5619-3513; March, Riccardo/0000-0003-3144-7537;
   Martini, Manuele/0000-0001-6508-2930
NR 25
TC 3
Z9 3
U1 0
U2 15
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0032-0633
J9 PLANET SPACE SCI
JI Planet Space Sci.
PD DEC
PY 2012
VL 74
IS 1
SI SI
BP 276
EP 282
DI 10.1016/j.pss.2012.09.006
PG 7
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 068SD
UT WOS:000313385600028
ER

PT J
AU Pineda, EJ
   Waas, AM
AF Pineda, E. J.
   Waas, A. M.
TI Modelling progressive failure of fibre reinforced laminated composites:
   mesh objective calculations
SO AERONAUTICAL JOURNAL
LA English
DT Article
ID FINITE-ELEMENT ANALYSIS; COMPRESSIVE FAILURE; MATRIX CRACKING; DAMAGE;
   PROPAGATION; PREDICTION; FRACTURE; DEFORMATION; PLY
AB A thermodynamically-based work potential theory for modelling progressive damage and failure in fibre-reinforced laminates is presented. The current, multiple-internal state variable (ISV) formulation, enhanced Schapery theory, utilises separate ISVs for modelling the effects of damage and failure. Damage is considered to be the effect of any structural changes in a material that manifest as pre-peak non-linearity in the stress versus strain response. Conversely, failure is taken to be the effect of the evolution of any mechanisms that results in post-peak strain softening. It is assumed, matrix microdamage is the dominant damage mechanism in continuous, fibre-reinforced, polymer matrix laminates, and its evolution is captured with a single ISV. Three additional ISVs are introduced to account for failure due to mode I transverse cracking, mode II transverse cracking, and mode I axial failure. Using the stationarity of the total work potential with respect to each ISV, a set of thermodynamically consistent evolution equations for the ISVs is derived. Typically, failure evolution (i.e. post-peak strain softening) results in pathologically mesh dependent solutions within a finite element method numerical setting. Therefore, consistent characteristic element lengths are introduced into the formulation of of the three failure potentials. The theory is implemented into commercial FEM software. The model is verified against experimental results from a laminated, quasi-isotropic, T800/3900-2 panel containing a central notch. Global load versus displacement, global load versus local strain gauge data, and macroscopic failure paths obtained from the models are compared to the experiments. Finally, a sensitivity study is performed on the failure parameters used in the model.
C1 [Pineda, E. J.] NASA, Glenn Res Ctr, Cleveland, OH USA.
   [Waas, A. M.] Univ Michigan, Ann Arbor, MI 48109 USA.
RP Pineda, EJ (reprint author), NASA, Glenn Res Ctr, Cleveland, OH USA.
EM evan.j.pineda@nasa.gov; dcw@umich.edu
NR 50
TC 5
Z9 5
U1 1
U2 13
PU ROYAL AERONAUTICAL SOC
PI LONDON
PA 4 HAMILTON PL, LONDON W1J 7BQ, ENGLAND
SN 0001-9240
J9 AERONAUT J
JI Aeronaut. J.
PD DEC
PY 2012
VL 116
IS 1186
BP 1221
EP 1246
PG 26
WC Engineering, Aerospace
SC Engineering
GA 067SW
UT WOS:000313316400002
ER

PT J
AU Sasai, T
   Nakai, S
   Setoyama, Y
   Ono, K
   Kato, S
   Mano, M
   Murakami, K
   Miyata, A
   Saigusa, N
   Nemani, RR
   Nasahara, KN
AF Sasai, Takahiro
   Nakai, Saori
   Setoyama, Yuko
   Ono, Keisuke
   Kato, Soushi
   Mano, Masayoshi
   Murakami, Kazutaka
   Miyata, Akira
   Saigusa, Nobuko
   Nemani, Ramakrishna R.
   Nasahara, Kenlo N.
TI Analysis of the spatial variation in the net ecosystem production of
   rice paddy fields using the diagnostic biosphere model, BEAMS
SO ECOLOGICAL MODELLING
LA English
DT Article
DE BEAMS; Rice paddy; NEP; Carbon cycle; Remote sensing; Biosphere model
ID METHANE EMISSION; CARBON-DIOXIDE; EAST-ASIA; CO2 FLUX; BIOGEOCHEMISTRY
   MODEL; SEASONAL-VARIATION; SOIL; SURFACE; SCALE; MODIS
AB To realistically understand spatial and temporal variations in the net ecosystem production (NEP) of rice paddies in Japan, we enhanced the existing diagnostic-type biosphere model with the addition of agricultural processes. Validated with a comparison of seasonal and annual variations over 5 years, the NEP estimations bore good agreement with the measurements. In regional-scale analyses, we targeted all rice paddy fields in Japan from January 2001 to December 2009. Before and after the model enhancement, the NEP showed very different spatial variations and absolute values, suggesting that the most effective improvements were the introduction of harvest and soil oxidation-reduction processes. In annual anomaly analyses covering a 9-year period, the NEP was found to be negative in 2003 and 2006 (-0.11 and -0.25 TgC/year) and positive in 2004 and 2007 (+0.02 and +0.21 TgC/year). We found that the negative values were caused by decreases in solar radiation and air temperature and the positive values were caused by increases in these two parameters and precipitation. In response to the NEP, our obtained harvested grain biomass values in 2003 and 2006 were lower than usual. The results were in good agreement with the results from reports of the Japan Meteorological Agency and the Ministry of Agriculture. Forestry, and Fisheries. (C) 2012 Elsevier B.V. All rights reserved.
C1 [Sasai, Takahiro] Nagoya Univ, Grad Sch Environm Studies, Dept Earth & Environm Sci, Chikusa Ku, Nagoya, Aichi 4648601, Japan.
   [Ono, Keisuke; Mano, Masayoshi; Miyata, Akira] Natl Inst Agroenvironm Sci, Tsukuba, Ibaraki 3058604, Japan.
   [Kato, Soushi; Saigusa, Nobuko] Natl Inst Environm Studies, Tsukuba, Ibaraki 3058506, Japan.
   [Murakami, Kazutaka; Nasahara, Kenlo N.] Univ Tsukuba, Tsukuba, Ibaraki 3058572, Japan.
   [Nemani, Ramakrishna R.] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
RP Sasai, T (reprint author), Nagoya Univ, Grad Sch Environm Studies, Dept Earth & Environm Sci, Chikusa Ku, Furo Cho, Nagoya, Aichi 4648601, Japan.
EM sasai@nagoya-u.jp
RI Sasai, Takahiro/E-6417-2011; 
OI Ono, Keisuke/0000-0002-0653-6346
FU National Institute for Environmental Studies; Japan Aerospace
   Exploration Agency Global Change Observation Mission - Climate project
   [102]; Japanese Ministry of Education, Culture, Sports, Science, and
   Technology [20710018, 23310015]; Global Environmental Monitoring, Center
   for Global Environmental Research
FX This study was supported in part by the National Institute for
   Environmental Studies and by the Japan Aerospace Exploration Agency
   Global Change Observation Mission - Climate project under Contract 102:
   "Development of integrative information of the terrestrial ecosystem", a
   Japanese Ministry of Education, Culture, Sports, Science, and Technology
   Grant-in-Aid for Young Scientists (B) (No. 20710018) and Scientific
   Research (B) (No. 23310015), and the Global Environmental Monitoring,
   Center for Global Environmental Research.
NR 43
TC 2
Z9 2
U1 1
U2 22
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0304-3800
J9 ECOL MODEL
JI Ecol. Model.
PD DEC
PY 2012
VL 247
BP 175
EP 189
DI 10.1016/j.ecolmodel.2012.08.016
PG 15
WC Ecology
SC Environmental Sciences & Ecology
GA 064QD
UT WOS:000313089600017
ER

PT J
AU Evirgen, A
   Basner, F
   Karaman, I
   Noebe, RD
   Pons, J
   Santamarta, R
AF Evirgen, Alper
   Basner, Fabian
   Karaman, Ibrahim
   Noebe, Ronald D.
   Pons, Jaume
   Santamarta, Ruben
TI EFFECT OF AGING ON THE MARTENSITIC TRANSFORMATION CHARACTERISTICS OF A
   Ni-RICH NiTiHf HIGH TEMPERATURE SHAPE MEMORY ALLOY
SO FUNCTIONAL MATERIALS LETTERS
LA English
DT Article
DE High temperature shape memory alloys; precipitation hardening;
   martensitic transformation; thermal stability
ID PHASE
AB The effect of aging on the microstructure and transformation temperatures of Ni50.3Ti34.7Hf15 was studied. Small interparticle spacing induced by the precipitation of very fine particles, 4 - 5 nm in size, decreases M-s after short term aging at 450 degrees C and 500 degrees C. The precipitate size and volume fraction increase with aging at longer times and higher temperatures, and as a consequence, M-s increases due to Ni-depletion of the matrix. In general, thermal stability is improved due to precipitation hardening.
C1 [Evirgen, Alper; Basner, Fabian; Karaman, Ibrahim] Texas A&M Univ, Dept Mech Engn, College Stn, TX 77843 USA.
   [Noebe, Ronald D.] NASA, Glenn Res Ctr, Struct & Mat Div, Cleveland, OH 44135 USA.
   [Pons, Jaume; Santamarta, Ruben] Univ Illes Balears, Dept Fis, E-07122 Palma De Mallorca, Spain.
RP Karaman, I (reprint author), Texas A&M Univ, Dept Mech Engn, College Stn, TX 77843 USA.
EM ikaraman@tamu.edu
RI Karaman, Ibrahim/E-7450-2010; Santamarta, Ruben/K-7865-2016
OI Karaman, Ibrahim/0000-0001-6461-4958; Santamarta,
   Ruben/0000-0003-3341-5758
FU U.S. National Science Foundation - International Materials Institutes
   Program, [DMR 08-44082]; Spanish MINECO; Fulbright scholarship; FEDER
   [MAT2011-28217-C02-01]; NASA Fundamental Aeronautics Program,
   Supersonics Project
FX This work was supported by the U.S. National Science Foundation -
   International Materials Institutes Program, grant no. DMR 08-44082. AE
   expresses his gratitude for the Fulbright scholarship. Partial financial
   support from Spanish MINECO and FEDER under project number
   MAT2011-28217-C02-01 is acknowledged. RDN gratefully acknowledges
   support from the NASA Fundamental Aeronautics Program, Supersonics
   Project.
NR 14
TC 12
Z9 12
U1 3
U2 29
PU WORLD SCIENTIFIC PUBL CO PTE LTD
PI SINGAPORE
PA 5 TOH TUCK LINK, SINGAPORE 596224, SINGAPORE
SN 1793-6047
J9 FUNCT MATER LETT
JI Funct. Mater. Lett.
PD DEC
PY 2012
VL 5
IS 4
AR 1250038
DI 10.1142/S1793604712500385
PG 5
WC Materials Science, Multidisciplinary
SC Materials Science
GA 069JD
UT WOS:000313430600003
ER

PT J
AU Bruhn, RL
   Sauber, J
   Cotton, MM
   Pavlis, TL
   Burgess, E
   Ruppert, N
   Forster, RR
AF Bruhn, Ronald L.
   Sauber, Jeanne
   Cotton, Michelle M.
   Pavlis, Terry L.
   Burgess, Evan
   Ruppert, Natalia
   Forster, Richard R.
TI Plate margin deformation and active tectonics along the northern edge of
   the Yakutat Terrane in the Saint Elias Orogen, Alaska, and Yukon, Canada
SO GEOSPHERE
LA English
DT Article
ID YAKATAGA SEISMIC GAP; ST-ELIAS; SOUTHERN ALASKA; LASER ALTIMETRY;
   STRIKE-SLIP; MALASPINA GLACIER; ELEVATION CHANGES; TRANSITION FAULT;
   EXHUMATION; EROSION
AB Structural syntaxes, tectonic aneurysms, and fault-bounded fore-arc slivers are important tectonic elements of orogenic belts worldwide. In this study we used high-resolution topography, geodetic imaging, seismic, and geologic data to advance understanding of how these features evolved during accretion of the Yakutat Terrane to North America. Because glaciers extend over much of the orogen, the topography and dynamics of the glaciers were analyzed to infer the location and nature of faults and shear zones that lie buried beneath the ice. The Fairweather transform fault system terminates by oblique-extensional splay faulting within a structural syntaxis, where thrust faulting and contractional strain drive rapid tectonic uplift and rock exhumation beneath the upper Seward Glacier. West of the syntaxis, oblique plate convergence created a dextral shear zone beneath the Bagley Ice Valley that may have been reactivated by reverse faulting when the subduction megathrust stepped eastward during the last 5-6 Ma. The Bagley fault zone dips steeply through the upper plate to intersect the subduction megathrust at depth, forming a fault-bounded crustal sliver capable of partitioning oblique convergence into strike-slip and thrust motion. Since ca. 20 Ma the Bagley fault accommodated more than 50 km of dextral shearing and several kilometers of reverse motion along its southern flank during terrane accretion. The fault is considered capable of generating earthquakes because it is suitably oriented for reactivation in the contemporary stress field, links to faults that generated large historic earthquakes, and is locally marked by seismicity.
C1 [Bruhn, Ronald L.; Cotton, Michelle M.] Univ Utah, Dept Geol & Geophys, Salt Lake City, UT 84112 USA.
   [Sauber, Jeanne] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
   [Pavlis, Terry L.] Univ Texas El Paso, Dept Geol Sci, El Paso, TX 79968 USA.
   [Burgess, Evan; Forster, Richard R.] Univ Utah, Dept Geog, Salt Lake City, UT 84112 USA.
   [Ruppert, Natalia] Univ Alaska, Inst Geophys, Alaska Earthquake Informat Ctr, Fairbanks, AK 99775 USA.
RP Bruhn, RL (reprint author), Univ Utah, Dept Geol & Geophys, Salt Lake City, UT 84112 USA.
EM ron.bruhn@utah.edu
RI Sauber, Jeanne/D-7684-2012
FU National Aeronautics and Space Administration grant entitled "Geodetic
   imaging of glacio-seismotectonic processes in southern Alaska"; National
   Science Foundation (NSF) Continental Dynamics Program; Office of Polar
   Programs [EAR0409009, EAR0735402, EAR0408959]
FX This research was supported by the National Aeronautics and Space
   Administration grant entitled "Geodetic imaging of glacio-seismotectonic
   processes in southern Alaska," awarded to J. Sauber, R.L. Bruhn, and
   R.R. Forster. Geological field observations and measurements cited in
   the paper were done in part during the Saint Elias Erosion and Tectonics
   Project, with funding through the National Science Foundation (NSF)
   Continental Dynamics Program and Office of Polar Programs, by grants
   EAR0409009 and EAR0735402 to Pavlis and EAR0408959 to Bruhn.
NR 103
TC 13
Z9 13
U1 2
U2 13
PU GEOLOGICAL SOC AMER, INC
PI BOULDER
PA PO BOX 9140, BOULDER, CO 80301-9140 USA
SN 1553-040X
J9 GEOSPHERE
JI Geosphere
PD DEC
PY 2012
VL 8
IS 6
BP 1384
EP 1407
DI 10.1130/GES00807.1
PG 24
WC Geosciences, Multidisciplinary
SC Geology
GA 062OT
UT WOS:000312929900013
ER

PT J
AU Dibarboure, G
   Schaeffer, P
   Escudier, P
   Pujol, MI
   Legeais, JF
   Faugere, Y
   Morrow, R
   Willis, JK
   Lambin, J
   Berthias, JP
   Picot, N
AF Dibarboure, G.
   Schaeffer, P.
   Escudier, P.
   Pujol, M. -I.
   Legeais, J. F.
   Faugere, Y.
   Morrow, R.
   Willis, J. K.
   Lambin, J.
   Berthias, J. P.
   Picot, N.
TI Finding Desirable Orbit Options for the "Extension of Life" Phase of
   Jason-1
SO MARINE GEODESY
LA English
DT Article
DE Jason-1; satellite altimetry; mesoscale; geodesy; orbit parameters; mean
   sea surface; sea surface height
ID SATELLITE ALTIMETER DATASETS; OPERATIONAL OCEANOGRAPHY; CRYOSAT-2;
   ANOMALIES; SYSTEM; OCEAN
AB The ageing of Jason-1, the risk of losing control of the satellite, and the collision risk with TOPEX/Poseidon (still in orbit and no longer maneuverable) initiated a reflection on a so-called extension of life phase (EoL) phase that would involve moving Jason-1 to a new orbit to mitigate collision risks while optimizing its science return. This paper describes three practical consequences of any such EoL phase: 1) the ability to build an unprecedented low inclination and high precision geodetic dataset, 2) the loss of coordination with Jason-2 and the associated mesoscale (and sea state) sampling degradation, and 3) the increased topography height error budget stemming from the use of a gridded mean sea surface in place of the classical repeat track analysis that operational systems have been using and improving for almost two decades. More than 17,000 potential orbits were analyzed to identify desirable altitude ranges that could host a Jason-1 EoL phase. The objective was to minimize the sampling degradation of ocean observations (primary objective of Jason-1) while securing a good geodetic EoL dataset (secondary objective of Jason-1). After a first automated screening and scoring process, the final orbit candidates are analyzed through an end-to-end Observing System Simulation Experiment (OSSE) protocol, assessing the multimission observational capability of the EoL phase in a DUACS/AVISO-like system. All EoL orbits are shown to be largely inferior to the interleaved orbit as far as oceanography is concerned. Yet some EoL options are shown to be more desirable than others because their sampling patterns blend well with Jason-2. Good geodetic orbit options could provide a unique bathymetry-oriented dataset and help improve gridded mean sea surfaces (MSS), while repetitive options with a short cycle could cancel some additional EoL errors if a conservative repeat track strategy is preferred.
C1 [Dibarboure, G.; Schaeffer, P.; Escudier, P.; Pujol, M. -I.; Legeais, J. F.; Faugere, Y.] CLS, F-31520 Ramonville St Agne, France.
   [Morrow, R.] Ctr Topog Oceans & Hydrosphere, Lab Etud Geophys & Oceanog Spatiales, Toulouse, France.
   [Lambin, J.; Berthias, J. P.; Picot, N.] Ctr Natl Etud Spatiales, F-31055 Toulouse, France.
   [Willis, J. K.] CALTECH, Jet Prop Lab, Pasadena, CA USA.
RP Dibarboure, G (reprint author), CLS, 8-10 Rue Hermes, F-31520 Ramonville St Agne, France.
EM gerald.dibarboure@cls.fr
NR 25
TC 6
Z9 6
U1 0
U2 0
PU TAYLOR & FRANCIS INC
PI PHILADELPHIA
PA 520 CHESTNUT STREET, STE 850, PHILADELPHIA, PA 19106 USA
SN 0149-0419
EI 1521-060X
J9 MAR GEOD
JI Mar. Geod.
PD DEC 1
PY 2012
VL 35
SU 1
SI SI
BP 363
EP 399
DI 10.1080/01490419.2012.717854
PG 37
WC Geochemistry & Geophysics; Oceanography; Remote Sensing
SC Geochemistry & Geophysics; Oceanography; Remote Sensing
GA 066RT
UT WOS:000313238600020
ER

PT J
AU Zak, M
AF Zak, Michail
TI Correction to Euler's equations and elimination of the closure problem
   in turbulence
SO AIP ADVANCES
LA English
DT Article
AB It has been demonstrated that the Euler equations of inviscid fluid are incomplete: according to the principle of release of constraints, absence of shear stresses must be compensated by additional degrees of freedom, and that leads to a Reynolds-type multivalued velocity field. However, unlike the Reynolds equations, the enlarged Euler's (EE) model provides additional equations for fluctuations, and that eliminates the closure problem. Therefore the EE equations are applicable to fully developed turbulent motions where the physical viscosity is vanishingly small compare to the turbulent viscosity, as well as to superfluids and atomized fluids. Analysis of coupled mean/fluctuation EE equations shows that fluctuations stabilize the whole system generating elastic shear waves and increasing speed of sound. Those turbulent motions that originated from instability of underlying laminar motions can be described by the modified Euler's equation with the closure provided by the stabilization principle: driven by instability of laminar motion, fluctuations grow until the new state attains a neutral stability in the enlarged (multivalued) class of functions, and these fluctuations can be taken as boundary conditions for the EE model. The approach is illustrated by an example. Copyright 2012 Author(s). This article is distributed under a Creative Commons Attribution 3.0 Unported License. [http://dx.doi.org/10.1063/1.4765064]
C1 CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
RP Zak, M (reprint author), CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
EM michail.zak@gmail.com
NR 7
TC 0
Z9 0
U1 1
U2 5
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 2158-3226
J9 AIP ADV
JI AIP Adv.
PD DEC
PY 2012
VL 2
IS 4
AR 042123
DI 10.1063/1.4765064
PG 11
WC Nanoscience & Nanotechnology; Materials Science, Multidisciplinary;
   Physics, Applied
SC Science & Technology - Other Topics; Materials Science; Physics
GA 061DX
UT WOS:000312828700036
ER

PT J
AU Thompson, DJ
   Baldini, L
   Uchiyama, Y
AF Thompson, D. J.
   Baldini, L.
   Uchiyama, Y.
TI Cosmic ray studies with the Fermi Gamma-ray Space Telescope Large Area
   Telescope
SO ASTROPARTICLE PHYSICS
LA English
DT Article
DE Cosmic rays; Gamma rays; Observations
ID REMNANT RX J1713.7-3946; SUPERNOVA REMNANT; PARTICLE-ACCELERATION;
   MOLECULAR CLOUDS; CASSIOPEIA-A; MAGNETIC-FIELD; MAGELLANIC-CLOUD; LAT
   DISCOVERY; EMISSION; ENERGY
AB The large Area Telescope (LAT) on the Fermi Gamma-ray Space Telescope provides both direct and indirect measurements of galactic cosmic rays (CR). The LAT high-statistics observations of the 7 GeV - 1 TeV electron plus positron spectrum and limits on spatial anisotropy constrain models for this cosmic-ray component. On a galactic scale, the LAT observations indicate that cosmic-ray sources may be more plentiful in the outer Galaxy than expected or that the scale height of the cosmic-ray diffusive halo is larger than conventional models. Production of cosmic rays in supernova remnants (SNR) is supported by the LAT gamma-ray studies of several of these, both young SNR and those interacting with molecular clouds. (C) 2011 Elsevier B.V. All rights reserved.
C1 [Thompson, D. J.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
   [Baldini, L.] Ist Nazl Fis Nucl, Sez Pisa, I-56127 Pisa, Italy.
   [Uchiyama, Y.] SLAC Natl Accelerator Lab, Menlo Pk, CA 94025 USA.
RP Thompson, DJ (reprint author), NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
EM David.J.Thompson@nasa.gov
OI Baldini, Luca/0000-0002-9785-7726
NR 87
TC 10
Z9 10
U1 0
U2 2
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0927-6505
EI 1873-2852
J9 ASTROPART PHYS
JI Astropart Phys.
PD DEC
PY 2012
VL 39-40
SI SI
BP 22
EP 32
DI 10.1016/j.astropartphys.2011.10.009
PG 11
WC Astronomy & Astrophysics; Physics, Particles & Fields
SC Astronomy & Astrophysics; Physics
GA 062LZ
UT WOS:000312922600004
ER

PT J
AU Usui, T
   Alexander, CMO
   Wang, JH
   Simon, JI
   Jones, JH
AF Usui, Tomohiro
   Alexander, Conel M. O'D.
   Wang, Jianhua
   Simon, Justin I.
   Jones, John H.
TI Origin of water and mantle-crust interactions on Mars inferred from
   hydrogen isotopes and volatile element abundances of olivine-hosted melt
   inclusions of primitive shergottites
SO EARTH AND PLANETARY SCIENCE LETTERS
LA English
DT Article
DE mantle-crust interaction; primordial Martian water; olivine-hosted melt
   inclusion; volatile element; hydrogen isotope; ion microprobe
ID LARKMAN NUNATAK 06319; MARTIAN MANTLE; TERRESTRIAL PLANETS; SNC
   METEORITES; ACCRETION HISTORY; SILICATE-GLASSES; OXYGEN FUGACITY;
   CARBON; DIFFERENTIATION; BASALTS
AB Volatile elements have influenced the differentiation and eruptive behavior of Martian magmas and played an important role in the evolution of Martian climate and near-surface environments. However, the abundances of volatiles, and in particular the amount of water in the Martian interior, are disputed. A record of volatile reservoirs is contained in primitive Martian basalts (shergottites). Olivine-hosted melt inclusions from a geochemically depleted shergottite (Yamato 980459, representing a very primitive Martian melt) possess undegassed water with a chondritic and Earth-like D/H ratio (delta D <= 275%). Based on volatile measurements in these inclusions, the water content of the depleted shergottite mantle is calculated to be 15-47 ppm, which is consistent with the dry mantle hypothesis. In contrast to D/H in the depleted shergottite, melt from an enriched shergottite (Larkman Nunatak 06319), which either formed by melting of an enriched mantle or by assimilation of crust, exhibits an extreme delta D of similar to 5000 parts per thousand, indicative of a surface reservoir (e.g., the Martian atmosphere or crustal hydrosphere). These data provide strong evidence that the Martian mantle had retained the primordial low-delta D component until at least the time of shergottite formation, and that young Martian basalts assimilated old Martian crust. (C) 2012 Elsevier B.V. All rights reserved.
C1 [Usui, Tomohiro; Simon, Justin I.; Jones, John H.] NASA, Astromat Res & Explorat Sci Directorate, Johnson Space Center, Houston, TX 77058 USA.
   [Usui, Tomohiro] Lunar & Planetary Inst, Houston, TX 77058 USA.
   [Alexander, Conel M. O'D.; Wang, Jianhua] Carnegie Inst Sci, Dept Terr Magnetism, Washington, DC 20015 USA.
RP Usui, T (reprint author), Tokyo Inst Technol, Dept Earth & Planetary Sci, Meguro Ku, 12-18,2-12-1 Ookayama, Tokyo 1528551, Japan.
EM tomohirousui@geo.titech.ac.jp
RI Wang, Jianhua/D-6500-2011; Simon, Justin/D-7015-2011; Usui,
   Tomohiro/G-1204-2010; Alexander, Conel/N-7533-2013
OI Wang, Jianhua/0000-0002-7671-2413; Usui, Tomohiro/0000-0002-4653-293X;
   Alexander, Conel/0000-0002-8558-1427
FU NASA; Astrobiology Institute
FX The NASA Antarctic Meteorite Collection and Curation group and the
   National Institute of Polar Research, Japan, are thanked for providing
   the shergottite samples. We are grateful to A.M. Davis, F.M. McCubbin
   and an anonymous reviewer for constructive reviews, and T.M. Harrison
   for editorial handling. This work was supported by a NASA Mars
   Fundamental Research Program grant to TU, a NASA Cosmochemistry Program
   grant to JJ, and by the Astrobiology Institute grant to CIW for CA and
   JW.
NR 69
TC 56
Z9 56
U1 5
U2 69
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0012-821X
EI 1385-013X
J9 EARTH PLANET SC LETT
JI Earth Planet. Sci. Lett.
PD DEC 1
PY 2012
VL 357
BP 119
EP 129
DI 10.1016/j.epsl.2012.09.008
PG 11
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 058GH
UT WOS:000312621600012
ER

PT J
AU Nakashima, D
   Ushikubo, T
   Joswiak, DJ
   Brownlee, DE
   Matrajt, G
   Weisberg, MK
   Zolensky, ME
   Kita, NT
AF Nakashima, Daisuke
   Ushikubo, Takayuki
   Joswiak, David J.
   Brownlee, Donald E.
   Matrajt, Graciela
   Weisberg, Michael K.
   Zolensky, Michael E.
   Kita, Noriko T.
TI Oxygen isotopes in crystalline silicates of comet Wild 2: A comparison
   of oxygen isotope systematics between Wild 2 particles and chondritic
   materials
SO EARTH AND PLANETARY SCIENCE LETTERS
LA English
DT Article
DE oxygen isotope ratios; crystalline silicate; comet 81P/Wild 2; solar
   system formation; Stardust
ID INTERPLANETARY DUST PARTICLES; SOLAR NEBULA; CARBONACEOUS CHONDRITES;
   STARDUST TRACKS; CR CHONDRITES; PROTOPLANETARY DISK; ORGANIC-MATTER; CV3
   CHONDRITES; ION MICROPROBE; II CHONDRULES
AB Oxygen three-isotope ratios of nine crystalline silicate particles from comet Wild 2 were measured to investigate oxygen isotope systematics of cometary materials. We are able to analyze particles as small as 4 mu m using an ion microprobe with a similar to 1 x 2 mu m beam by locating the analysis spots with an accuracy of +/- 0.4 mu m. Three particles of Mn-rich forsterite, known as low-iron, manganese-enriched (LIME) olivine, showed extremely O-16-rich signatures (delta O-13, delta O-17 similar to -50 parts per thousand.), similar to refractory inclusions in chondrites. The three Mn-rich forsterite particles may have formed by condensation from an O-16-rich solar nebula gas. Other particles consist of olivine and/or pyroxene with a wide range of Mg# [=molar MgO/(FeO + MgO) %] from 60 to 96. Their oxygen isotope ratios plot nearly along the carbonaceous chondrite anhydrous mineral (CCAM) and Young and Russell lines with Delta O-17(=delta O-17-0.52 x delta O-18) values of -3.0 parts per thousand to +2.5 parts per thousand. These data are similar to the range observed from previous analyses of Wild 2 crystalline silicates and those of chondrules in carbonaceous chondrites. Six particles extracted from Stardust track 77 show diverse chemical compositions and isotope ratios; two Mn-rich forsterites, FeO-poor pigeonite, and three FeO-rich olivines with a wide range of Delta O-17 values from -24 parts per thousand. to + 1.6 parts per thousand.. These results confirmed that the original projectile that formed track 77 was an aggregate (> 6 mu m) of silicate particles that formed in various environments. The Delta O-17 values of ferromagnesian Wild 2 particles (including data from previous studies) increase from similar to -23 parts per thousand to + 2.5 parts per thousand with decreasing Mg#: Delta O-17 values of Mn-rich forsterite particles (Mg#=98-99.8) cluster at -23 parts per thousand., those of FeO-poor particles (Mg#=95-97) cluster at -2 parts per thousand, and those of FeO-rich particles (Mg# <= 90) scatter mainly from -1.5 parts per thousand. to + 2.5 parts per thousand., Compared to chondrules in primitive chondrites, the systematic trend between Mg# and Delta O-17 among the Wild 2 particles is most similar to that reported for CR chondrite chondrules. We argue that CR chondrites and some cometary materials share multiple common chemical and isotope characteristics. We suggest that many of the crystalline silicate particles formed in the outer regions of the asteroid belt, or regions that share the common properties, and were transported to comet-forming regions and accreted into comet Wild 2. (C) 2012 Elsevier B.V. All rights reserved.
C1 [Nakashima, Daisuke; Ushikubo, Takayuki; Kita, Noriko T.] Univ Wisconsin, Dept Geosci, WiscSIMS, Madison, WI 53706 USA.
   [Joswiak, David J.; Brownlee, Donald E.; Matrajt, Graciela] Univ Washington, Dept Astron, Seattle, WA 98195 USA.
   [Weisberg, Michael K.] CUNY, Dept Phys Sci, Kingsborough Community Coll, Brooklyn, NY 11235 USA.
   [Weisberg, Michael K.] CUNY, Grad Ctr, Brooklyn, NY 11235 USA.
   [Weisberg, Michael K.] Amer Museum Nat Hist, Dept Earth & Planetary Sci, New York, NY 10024 USA.
   [Zolensky, Michael E.] NASA, Johnson Space Ctr, Houston, TX 77058 USA.
RP Nakashima, D (reprint author), Univ Wisconsin, Dept Geosci, WiscSIMS, Madison, WI 53706 USA.
EM naka@geology.wisc.edu
RI Kita, Noriko/H-8035-2016
OI Kita, Noriko/0000-0002-0204-0765
FU NASA [NNX09AC30G, NNX10AI89GS01]; NSF-EAR [0319230, 0744079, 1053466];
   NASA (Cosmochemistry and Laboratory Analysis of Returned Samples
   Program)
FX The manuscript was greatly improved by reviews from J. Aleon and an
   anonymous reviewer. The authors thank R.K. Noll for help with FIB and
   FE-SEM observation, H. Xu and P.E. Brown for use of a polarizing
   microscope and high magnification objective lens, J. Kern for SIMS
   support, and T.J. Tenner for kindly providing oxygen isotope data of CR3
   chondrite chondrules and for discussion. R.C. Ogliore and K. Nagashima
   kindly provided us oxygen isotope data of the Wild 2 particle Iris for
   our discussion. This work is supported by various NASA programs (NK,
   NNX09AC30G; DB, NNX10AI89GS01; Cosmochemistry and Laboratory Analysis of
   Returned Samples Program to MZ). WiscSIMS is partly supported by NSF-EAR
   (0319230, 0744079, 1053466).
NR 87
TC 23
Z9 23
U1 0
U2 17
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0012-821X
EI 1385-013X
J9 EARTH PLANET SC LETT
JI Earth Planet. Sci. Lett.
PD DEC 1
PY 2012
VL 357
BP 355
EP 365
DI 10.1016/j.epsl.2012.09.041
PG 11
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 058GH
UT WOS:000312621600035
ER

PT J
AU Little, MP
   Bazyka, D
   Bouffler, SD
   Harrison, JD
   Cardis, E
   Cucinotta, FA
   Kreuzer, M
   Laurent, O
   Tapio, S
   Wakeford, R
   Zablotska, L
   Lipshulrz, SE
AF Little, Mark P.
   Bazyka, Dimitry
   Bouffler, Simon D.
   Harrison, John D.
   Cardis, Elisabeth
   Cucinotta, Francis A.
   Kreuzer, Michaela
   Laurent, Olivier
   Tapio, Soile
   Wakeford, Richard
   Zablotska, Lydia
   Lipshulrz, Steven E.
TI Estimating Risk of Circulatory Disease: Little et al. Respond
SO ENVIRONMENTAL HEALTH PERSPECTIVES
LA English
DT Letter
ID ATOMIC-BOMB SURVIVORS; IONIZING-RADIATION; MORTALITY; EXPOSURE
C1 [Little, Mark P.] NCI, Radiat Epidemiol Branch, Rockville, MD USA.
   [Bazyka, Dimitry] Res Ctr Radiat Med, Kiev, Ukraine.
   [Bouffler, Simon D.; Harrison, John D.] Hlth Protect Agcy, Chilton, England.
   [Cardis, Elisabeth] CREAL Ctr Res Environm Epidemiol, Barcelona, Spain.
   [Cucinotta, Francis A.] NASA, Lyndon B Johnson Space Ctr, Radiat Hlth Off, Houston, TX 77058 USA.
   [Kreuzer, Michaela] Fed Off Radiat Protect, Dept Radiat Protect & Hlth, Oberschleissheim, Germany.
   [Laurent, Olivier] Inst Radioprotect & Surete Nucl, Lab Epidemiol, Fontenay Aux Roses, France.
   [Tapio, Soile] Helmholtz Zentrum Munchen, Inst Radiat Biol, Oberschleissheim, Germany.
   [Wakeford, Richard] Univ Manchester, Dalton Nucl Inst, Manchester, Lancs, England.
   [Zablotska, Lydia] Univ Calif San Francisco, Dept Epidemiol & Biostat, San Francisco, CA 94143 USA.
   [Lipshulrz, Steven E.] Univ Miami, Dept Pediat, Leonard M Miller Sch Med, Miami, FL 33152 USA.
RP Little, MP (reprint author), NCI, Radiat Epidemiol Branch, Rockville, MD USA.
EM mark.little@nih.gov
RI Tapio, Soile/M-7358-2014; Cardis, Elisabeth/C-3904-2017; 
OI Tapio, Soile/0000-0001-9860-3683; Wakeford, Richard/0000-0002-2934-0987
NR 9
TC 2
Z9 2
U1 1
U2 4
PU US DEPT HEALTH HUMAN SCIENCES PUBLIC HEALTH SCIENCE
PI RES TRIANGLE PK
PA NATL INST HEALTH, NATL INST ENVIRONMENTAL HEALTH SCIENCES, PO BOX 12233,
   RES TRIANGLE PK, NC 27709-2233 USA
SN 0091-6765
J9 ENVIRON HEALTH PERSP
JI Environ. Health Perspect.
PD DEC
PY 2012
VL 120
IS 12
BP A453
EP A454
DI 10.1289/ehp.1206046R
PG 2
WC Environmental Sciences; Public, Environmental & Occupational Health;
   Toxicology
SC Environmental Sciences & Ecology; Public, Environmental & Occupational
   Health; Toxicology
GA 056QB
UT WOS:000312504900006
ER

PT J
AU Heinrich, F
   Kessler, MT
   Dohmen, S
   Singh, M
   Prechtl, MHG
   Mathur, S
AF Heinrich, Frank
   Kessler, Michael T.
   Dohmen, Stephan
   Singh, Mrityunjay
   Prechtl, Martin H. G.
   Mathur, Sanjay
TI Molecular Palladium Precursors for Pd0 Nanoparticle Preparation by
   Microwave Irradiation: Synthesis, Structural Characterization and
   Catalytic Activity
SO EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
LA English
DT Article
DE Palladium; Complexes; Nanoparticles; Cross-coupling; Heck reaction; Wood
ID LIGAND-FREE PALLADIUM; COUPLING REACTIONS; HECK REACTION; METAL
   NANOPARTICLES; IONIC LIQUIDS; HYDROGEN GAS; NOBLE-METAL; SUZUKI;
   NANOSTRUCTURES; MORPHOLOGY
AB Two new palladium complexes [Pd(MEA)2Cl2] (1) and [Pd(MEA)2Br2] (2) [MEA = (2-methoxyethyl)amine] were synthesized by the reaction of 2 equiv. of MEA with PdCl2 or [(cod)PdBr2] (cod = cycloocta-1,5-diene), respectively. Single-crystal X-ray diffraction analysis of 1 and 2 revealed the formation of square-planar trans complexes with palladium coordinated by chloride/bromide ions and N-atoms of MEA bonded in a monodentate fashion. Given their molecular form and solubility, 1 and 2 act as intractable precursors to Pd nanoparticles by microwave-assisted synthesis. The influence of the reaction temperature, irradiation time and surfactant (PVP) concentration on the size (540 nm) of the resulting particles was studied by DLS (hydrodynamic diameter) and TEM analyses (particle size). The growth mechanism of the nanoparticles depended on the type of halide ligand. Powder X-ray diffractometry confirmed the formation of elemental Pd particles that were embedded in carbonized wood to examine their potential as a catalyst. The catalytic activity of these nanoscale particles was evaluated in carboncarbon cross-coupling reactions by using Heck, Suzuki and Sonogashira reactions as benchmark models. The investigations included recycling experiments that resulted in total turnover numbers of 4321 (Heck), 6173 (Sonogashira) and 8223 (Suzuki).
C1 [Heinrich, Frank; Kessler, Michael T.; Dohmen, Stephan; Prechtl, Martin H. G.; Mathur, Sanjay] Univ Cologne, Dept Chem, Chair Inorgan & Mat Chem, D-50939 Cologne, Germany.
   [Singh, Mrityunjay] NASA, Glenn Res Ctr, Ohio Aerosp Inst, Cleveland, OH 44135 USA.
RP Prechtl, MHG (reprint author), Univ Cologne, Dept Chem, Chair Inorgan & Mat Chem, D-50939 Cologne, Germany.
EM sanjay.mathur@uni-koeln.de
RI Prechtl, Martin/A-7416-2008
OI Prechtl, Martin/0000-0003-2155-8006
FU University of Cologne; Regional Research Cluster - Sustainable Chemical
   Systems (SusChemSys); Ministry of Innovation, Science and Research of
   the state NRW (MIWF-NRW)
FX The authors gratefully acknowledge the University of Cologne and the
   Regional Research Cluster - Sustainable Chemical Systems (SusChemSys)
   for financial support. Thanks are due to Dr. H. Shen and J. Schlafer
   (TEM analysis), Dr. I. Pantenburg (single-crystal X-ray diffractometry),
   R. Fiz (SEM analysis), A. Baum (mass spectrometry), and S. Kremer (CHNS
   analysis) for their help and discussions. M. H. G. P. is thankful to the
   Ministry of Innovation, Science and Research of the state NRW (MIWF-NRW)
   for financial support.
NR 48
TC 4
Z9 5
U1 3
U2 55
PU WILEY-V C H VERLAG GMBH
PI WEINHEIM
PA BOSCHSTRASSE 12, D-69469 WEINHEIM, GERMANY
SN 1434-1948
J9 EUR J INORG CHEM
JI Eur. J. Inorg. Chem.
PD DEC
PY 2012
IS 36
BP 6027
EP 6033
DI 10.1002/ejic.201200380
PG 7
WC Chemistry, Inorganic & Nuclear
SC Chemistry
GA 053RO
UT WOS:000312291000013
ER

PT J
AU Nativi, S
   Craglia, M
   Geller, G
   Jackson, M
   Khalsa, SJS
AF Nativi, Stefano
   Craglia, Max
   Geller, Gary
   Jackson, Mike
   Khalsa, Siri Jodha Singh
TI Foreword to the Special Issue on Interoperability Architectures and
   Arrangements for Multi-Disciplinary Earth Observation Systems and
   Applications
SO IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE
   SENSING
LA English
DT Editorial Material
C1 [Nativi, Stefano] Natl Res Council Italy CNR, ESSI Lab, Inst Atmospher Pollut Res CNR IIA, Rome, Italy.
   [Craglia, Max] Commiss European Communities, Joint Res Ctr, Inst Environm & Sustainabil, I-21020 Ispra, Italy.
   [Geller, Gary] NASA, Jet Prop Lab, Ecol Forecasting Program, CALTECH, Pasadena, CA USA.
   [Jackson, Mike] Univ Nottingham, Nottingham NG7 2RD, England.
   [Khalsa, Siri Jodha Singh] Univ Colorado, Cooperat Inst Res Environm Sci, Natl Snow & Ice Data Ctr, Boulder, CO 80309 USA.
RP Nativi, S (reprint author), Natl Res Council Italy CNR, ESSI Lab, Inst Atmospher Pollut Res CNR IIA, Rome, Italy.
EM stefano.nativi@cnr.it; massimo.craglia@jrc.ec.europa.eu;
   gary.n.geller@jpl.nasa.gov; mike.jackson@nottingham.ac.uk;
   sjsk@nsidc.org
RI Nativi, Stefano/E-7180-2016; KHalsa, Siri Jodha/A-9338-2009; 
OI Nativi, Stefano/0000-0003-3185-8539; KHalsa, Siri
   Jodha/0000-0001-9217-5550; Geller, Gary/0000-0002-4490-6002
NR 0
TC 0
Z9 0
U1 0
U2 14
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 1939-1404
J9 IEEE J-STARS
JI IEEE J. Sel. Top. Appl. Earth Observ. Remote Sens.
PD DEC
PY 2012
VL 5
IS 6
SI SI
BP 1591
EP 1593
DI 10.1109/JSTARS.2012.2234234
PG 3
WC Engineering, Electrical & Electronic; Geography, Physical; Remote
   Sensing; Imaging Science & Photographic Technology
SC Engineering; Physical Geography; Remote Sensing; Imaging Science &
   Photographic Technology
GA 063OL
UT WOS:000313009300001
ER

PT J
AU Zell, E
   Huff, AK
   Carpenter, AT
   Friedl, LA
AF Zell, Erica
   Huff, Amy K.
   Carpenter, Adam T.
   Friedl, Lawrence A.
TI A User-Driven Approach to Determining Critical Earth Observation
   Priorities for Societal Benefit
SO IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE
   SENSING
LA English
DT Article
DE Earth Observing System; environmental factors; international
   collaboration; geoscience; remote sensing; social factors
AB In order to help data providers make informed decisions regarding the availability and accessibility of Earth observations for societal benefit, a cross-sectoral meta-analysis of observation priorities was conducted from the perspective of users. The analysis was organized around the Group on Earth Observations' (GEOs) societal benefit areas (SBAs): Agriculture, Biodiversity, Climate, Disasters, Ecosystems, Energy, Health, Water, and Weather. Users' needs for Earth observations were prioritized using a two-stage process. In the first stage, critical observations for each individual SBA were determined based on observation needs expressed in publicly available documents, such as scientific journal articles, scientific reports, and workshop summaries. In the second stage, an ensemble of four statistically robust methods was used to prioritize the observations identified in the individual SBA analyses, based on their criticality and commonality to multiple SBAs. The result of the meta-analysis is a ranking of 152 critical Earth observation priorities; the highest priority Earth observations are those that are considered critical for the largest number of SBAs. The 10 highest ranked observations are: (1) Precipitation, (2) Soil Moisture, (3) Surface Air Temperature, (4) Land Cover, (5) Surface Wind Speed (6) Vegetation Cover, (7) Surface Humidity, (8) Urbanization, (9) Vegetation Type, and (10) Surface Wind Direction and Sea Surface Temperature (tie). This study represents one viable method to assess the priority of Earth observations from the perspective of users. The list of critical Earth observation priorities from this study is a foundation for engagement between data providers and users in regard to observation priorities.
C1 [Zell, Erica; Huff, Amy K.] Battelle Mem Inst, Arlington, VA USA.
   [Carpenter, Adam T.] Amer Water Works Assoc, Washington, DC USA.
   [Friedl, Lawrence A.] NASA, Appl Sci Program, Div Earth Sci, Washington, DC 20546 USA.
RP Zell, E (reprint author), Battelle Mem Inst, Arlington, VA USA.
EM zelle@battelle.org
RI Carpenter, Adam/J-8241-2015
OI Carpenter, Adam/0000-0002-9688-8088
FU NASA Applied Sciences Division [US-09-01a, GS-23F-8167H]; U.S.
   Environmental Protection Agency; German Federal Ministry of
   Transportation, Building and Urban Development
FX This work was supported by GEO Task US-09-01a from NASA Applied Sciences
   Division (contract GS-23F-8167H) as well as from the U.S. Environmental
   Protection Agency and the German Federal Ministry of Transportation,
   Building and Urban Development.
NR 12
TC 10
Z9 13
U1 0
U2 15
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 1939-1404
J9 IEEE J-STARS
JI IEEE J. Sel. Top. Appl. Earth Observ. Remote Sens.
PD DEC
PY 2012
VL 5
IS 6
SI SI
BP 1594
EP 1602
DI 10.1109/JSTARS.2012.2199467
PG 9
WC Engineering, Electrical & Electronic; Geography, Physical; Remote
   Sensing; Imaging Science & Photographic Technology
SC Engineering; Physical Geography; Remote Sensing; Imaging Science &
   Photographic Technology
GA 063OL
UT WOS:000313009300002
ER

PT J
AU Kuo, KS
   Lynnes, CS
   Ramachandran, R
AF Kuo, Kwo-Sen
   Lynnes, Christopher S.
   Ramachandran, Rahul
TI A Proposed Earth Science Collaboratory for Remote Sensing Data Analysis
SO IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE
   SENSING
LA English
DT Article
DE Collaboration; collaborative tools; geosciences; online communities;
   remote sensing
ID SYSTEM; CHALLENGES
AB The past decade has seen many advancements in data management of remote sensing data, with much of the data available online. However, while the data access problem is largely (though not completely) solved, remote sensing data is still sometimes difficult to find, in part because of the myriad data sources. Data can also be difficult to use, especially for first-time users of a particular data set, due to complex data structures and data formats, as well as the need to understand how ancillary and quality information should be used in analysis. We propose the development of an Earth Science Collaboratory (ESC), which would be a rich science data analysis environment available to the community. The ESC would integrate tools and services with datasets and facilitate the sharing of the related knowledge.
C1 [Kuo, Kwo-Sen] NASA, Goddard Earth Sci Technol & Res GESTAR Program, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
   [Lynnes, Christopher S.] NASA, Goddard Earth Sci Data & Informat Serv Ctr GES DI, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
   [Ramachandran, Rahul] Univ Alabama, Informat Technol & Syst Ctr, Huntsville, AL 30899 USA.
RP Kuo, KS (reprint author), NASA, Goddard Earth Sci Technol & Res GESTAR Program, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
EM K-S.Kuo@nasa.gov; Christopher.S.Lynnes@nasa.gov;
   Rahul.Ramachandran@uah.edu
OI Ramachandran, Rahul/0000-0002-0647-1941
FU NASA
FX This work was supported in part by NASA's Advancing Collaborative
   Connections for Earth System Science (ACCESS) program.
NR 21
TC 0
Z9 0
U1 1
U2 11
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 1939-1404
J9 IEEE J-STARS
JI IEEE J. Sel. Top. Appl. Earth Observ. Remote Sens.
PD DEC
PY 2012
VL 5
IS 6
SI SI
BP 1612
EP 1616
DI 10.1109/JSTARS.2012.2199086
PG 5
WC Engineering, Electrical & Electronic; Geography, Physical; Remote
   Sensing; Imaging Science & Photographic Technology
SC Engineering; Physical Geography; Remote Sensing; Imaging Science &
   Photographic Technology
GA 063OL
UT WOS:000313009300004
ER

PT J
AU Melton, FS
   Johnson, LF
   Lund, CP
   Pierce, LL
   Michaelis, AR
   Hiatt, SH
   Guzman, A
   Adhikari, DD
   Purdy, AJ
   Rosevelt, C
   Votava, P
   Trout, TJ
   Temesgen, B
   Frame, K
   Sheffner, EJ
   Nemani, RR
AF Melton, Forrest S.
   Johnson, Lee F.
   Lund, Christopher P.
   Pierce, Lars L.
   Michaelis, Andrew R.
   Hiatt, Samuel H.
   Guzman, Alberto
   Adhikari, Diganta D.
   Purdy, Adam J.
   Rosevelt, Carolyn
   Votava, Petr
   Trout, Thomas J.
   Temesgen, Bekele
   Frame, Kent
   Sheffner, Edwin J.
   Nemani, Ramakrishna R.
TI Satellite Irrigation Management Support With the Terrestrial Observation
   and Prediction System: A Framework for Integration of Satellite and
   Surface Observations to Support Improvements in Agricultural Water
   Resource Management
SO IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE
   SENSING
LA English
DT Article
DE Agriculture; irrigation; remote sensing; soil moisture; water resources;
   wireless sensor networks; web services
ID REFERENCE EVAPOTRANSPIRATION; CROP-EVAPOTRANSPIRATION; ENERGY-BALANCE;
   NORTH-AMERICA; SHADED AREA; MODEL; REFLECTANCE; CALIFORNIA; CANOPY;
   COEFFICIENTS
AB In California and other regions vulnerable to water shortages, satellite-derived estimates of key hydrologic fluxes can support agricultural producers and water managers in maximizing the benefits of available water supplies. The Satellite Irrigation Management Support (SIMS) project combines NASA's Terrestrial Observation and Prediction System (TOPS), Landsat and MODIS satellite imagery, and surface sensor networks to map indicators of crop irrigation demand and develop information products to support irrigation management and other water use decisions. TOPS-SIMS provides the computing and data processing systems required to support automated, near real-time integration of observations from satellite and surface sensor networks, and generates data and information in formats that are convenient for agricultural producers, water managers, and other end users. Using the TOPS modeling framework to integrate data from multiple sensor networks in near real-time, SIMS currently maps crop fractional cover, basal crop coefficients, and basal crop evapotranspiration. Map products are generated at 30 m resolution on a daily basis over approximately 4 million ha of California farmland. TOPS-SIMS is a fully operational prototype, and a publicly available beta-version of the web interface is being pilot tested by farmers, irrigation consultants, and water managers in California. Data products are distributed via dynamic web services, which support both visual mapping and time-series queries, to allow users to obtain information on spatial and temporal patterns in crop canopy development and water requirements. TOPS-SIMS is an application framework that demonstrates the value of integrating multi-disciplinary Earth observation systems to provide benefits for water resource management.
C1 [Melton, Forrest S.; Johnson, Lee F.; Lund, Christopher P.; Pierce, Lars L.; Michaelis, Andrew R.; Hiatt, Samuel H.; Guzman, Alberto; Purdy, Adam J.; Rosevelt, Carolyn; Votava, Petr] Calif State Univ, Seaside, CA 93955 USA.
   [Melton, Forrest S.; Johnson, Lee F.; Lund, Christopher P.; Michaelis, Andrew R.; Hiatt, Samuel H.; Guzman, Alberto; Votava, Petr; Sheffner, Edwin J.; Nemani, Ramakrishna R.] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
   [Adhikari, Diganta D.] Calif State Univ Fresno, Ctr Irrigat Technol, Fresno, CA 93740 USA.
   [Trout, Thomas J.] USDA ARS, Ft Collins, CO 80526 USA.
   [Temesgen, Bekele; Frame, Kent] Calif Dept Water Resources, Sacramento, CA 95814 USA.
RP Melton, FS (reprint author), Calif State Univ, Seaside, CA 93955 USA.
EM forrest.s.melton@nasa.gov; lee.f.johnson@nasa.gov; clund@csumb.edu;
   lpierce@csumb.edu; an-drew.r.michaelis@nasa.gov; sam.hiatt@gmail.com;
   aguzman@csumb.edu; diganta@csufresno.edu; adamjpurdy@gmail.com;
   crosevelt@csumb.edu; petr.votava-1@nasa.gov; thomas.trout@ars.usda.gov;
   temesgen@water.ca.gov; kframe@water.ca.gov; edwin.j.sheffner@nasa.gov;
   rama.nemani@nasa.gov
OI Trout, Thomas/0000-0003-1896-9170
FU NASA [NNX10AE48A]; University Corp. at Monterey Bay
FX TOPS-SIMS development was funded by the NASA Applied Sciences Program
   under Award NNX10AE48A to California State University, Monterey Bay
   (CSUMB).; The energy-balance comparison data were generated by SEBAL
   North America, Inc., under a sub-contract from the University Corp. at
   Monterey Bay. The authors gratefully acknowledge Ian Harlan and Randall
   Holloway of CSUMB for assistance with deployment of field
   instrumentation, as well as the anonymous reviewers for their comments
   and suggestions to improve the manuscript.
NR 51
TC 9
Z9 9
U1 1
U2 32
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 1939-1404
EI 2151-1535
J9 IEEE J-STARS
JI IEEE J. Sel. Top. Appl. Earth Observ. Remote Sens.
PD DEC
PY 2012
VL 5
IS 6
SI SI
BP 1709
EP 1721
DI 10.1109/JSTARS.2012.2214474
PG 13
WC Engineering, Electrical & Electronic; Geography, Physical; Remote
   Sensing; Imaging Science & Photographic Technology
SC Engineering; Physical Geography; Remote Sensing; Imaging Science &
   Photographic Technology
GA 063OL
UT WOS:000313009300015
ER

PT J
AU Kussul, N
   Mandl, D
   Moe, K
   Mund, JP
   Post, J
   Shelestov, A
   Skakun, S
   Szarzynski, J
   Van Langenhove, G
   Handy, M
AF Kussul, Nataliia
   Mandl, Dan
   Moe, Karen
   Mund, Jan-Peter
   Post, Joachim
   Shelestov, Andrii
   Skakun, Sergii
   Szarzynski, Joerg
   Van Langenhove, Guido
   Handy, Matthew
TI Interoperable Infrastructure for Flood Monitoring: SensorWeb, Grid and
   Cloud
SO IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE
   SENSING
LA English
DT Article
DE Earth observation; remote sensing; floods; sensor web; risk analysis;
   Grid; cloud computing; GEOSS
ID TECHNOLOGY; SYSTEM
AB The paper presents an international multi-disciplinary initiative, a Namibia SensorWeb Pilot Project, that was created as a testbed for evaluating and prototyping key technologies for rapid acquisition and distribution of data products for decision support systems to monitor floods. Those key technologies include SensorWebs, Grids and Computation Clouds. This pilot project aims at developing an operational trans-boundary flood management decision support system for the Southern African region to provide useful flood and water-borne disease forecasting tools for local decision makers. This effort integrates space-based and ground sensor data along with higher level geospatial data products to enable risk assessment and ultimately risk maps related to flood disaster management and water-related disease management. We present an overall architecture of the Pilot along with components and services being developed. Additionally, case-studies and results achieved so far are discussed. The presented work is being carried out within GEO 2009-2011 Work Plan as CEOS WGISS contribution.
C1 [Kussul, Nataliia] Space Res Inst NASU NSAU, Dept Space Informat Technol & Syst, Kiev, Ukraine.
   [Moe, Karen] NASA, Earth Sci Technol Off, Goddard Space Flight Ctr, Greenbelt, MD USA.
   [Post, Joachim] German Aerosp Ctr DLR, German Remote Sensing Data Ctr, Oberpfaffenhofen, Germany.
   [Szarzynski, Joerg] United Nations Univ, Inst Environm & Human Secur UNU EHS, Bonn, Germany.
   [Van Langenhove, Guido] Namibian Minist Agr Water & Forestry MAWF, Dept Water Affairs, Hydrol Serv Namibia, Windhoek, Namibia.
RP Kussul, N (reprint author), Space Res Inst NASU NSAU, Dept Space Informat Technol & Syst, Kiev, Ukraine.
EM inform@ikd.kiev.ua; daniel.j.mandl@nasa.gov; karen.moe@nasa.gov;
   Jan-Peter.Mund@hnee.de; Joachim.Post@dlr.de; andrii.shelestov@gmail.com;
   serhiy.skakun@ikd.kiev.ua; szarzynski@ehs.unu.edu;
   LangenhoveG@mawf.gov.na; matthew.handy@nasa.gov
RI Kussul, Nataliia/N-8649-2014; Shelestov, Andrii/N-9053-2014; Skakun,
   Sergii/E-2769-2012
OI Kussul, Nataliia/0000-0002-9704-9702; Shelestov,
   Andrii/0000-0001-9256-4097; Skakun, Sergii/0000-0002-9039-0174
FU U.S. Civilian Research and Development Foundation (CRDF)
   [UKB2-2972-KV-09]
FX The work done at the Space Research Institute NASU-NSAU was supported in
   part by the U.S. Civilian Research and Development Foundation (CRDF)
   Grant UKB2-2972-KV-09.
NR 24
TC 21
Z9 21
U1 2
U2 26
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 1939-1404
EI 2151-1535
J9 IEEE J-STARS
JI IEEE J. Sel. Top. Appl. Earth Observ. Remote Sens.
PD DEC
PY 2012
VL 5
IS 6
SI SI
BP 1740
EP 1745
DI 10.1109/JSTARS.2012.2192417
PG 6
WC Engineering, Electrical & Electronic; Geography, Physical; Remote
   Sensing; Imaging Science & Photographic Technology
SC Engineering; Physical Geography; Remote Sensing; Imaging Science &
   Photographic Technology
GA 063OL
UT WOS:000313009300018
ER

PT J
AU Danner, EM
   Melton, FS
   Pike, A
   Hashimoto, H
   Michaelis, A
   Rajagopalan, B
   Caldwell, J
   DeWitt, L
   Lindley, S
   Nemani, RR
AF Danner, Eric M.
   Melton, Forrest S.
   Pike, Andrew
   Hashimoto, Hirofumi
   Michaelis, Andrew
   Rajagopalan, Balaji
   Caldwell, Jason
   DeWitt, Lynn
   Lindley, Steven
   Nemani, Ramakrishna R.
TI River Temperature Forecasting: A Coupled-Modeling Framework for
   Management of River Habitat
SO IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE
   SENSING
LA English
DT Article
DE Forecasting; water resources
ID STREAM; PREDICTION; DYNAMICS; SYSTEM
AB Humans have substantially altered the thermal regimes of freshwater habitats worldwide, with significant environmental consequences. There is a critical need for a comprehensive modeling framework for forecasting the downstream impacts of two of the most common anthropogenic structures that alter river water temperatures: 1) dams that selectively release water from thermally stratified reservoirs, and 2) power generating stations and industrial plants that use river water for once-through cooling. These facilities change the thermal dynamics of the downstream waters through a complex interaction of water release volume and temperature and the subsequent exchange with the environment downstream. In order to stay within the downstream temperature limits imposed by regulatory agencies, managers must monitor not just release volumes and temperatures, but also need to be able to forecast the thermal impacts of their day-to-day operations on habitat which may be hundreds of kilometers downstream. Here we describe a coupled modeling framework that links mesoscale weather and ecological models to generate inputs for a physically-based water temperature model for monitoring and forecasting river temperatures downstream from these facilities at fine spatiotemporal scales. We provide an example of how this modeling framework is being applied to a water allocation decision support system (DSS) for the management of Endangered Species Act (ESA) listed salmon species in the Sacramento River in California.
C1 [Danner, Eric M.; Pike, Andrew; Lindley, Steven] SW Fisheries Sci Ctr, Natl Marine Fisheries Serv, Santa Cruz, CA 95060 USA.
   [Melton, Forrest S.; Hashimoto, Hirofumi; Michaelis, Andrew] Calif State Univ, Moffett Field, CA 94035 USA.
   [Melton, Forrest S.; Hashimoto, Hirofumi; Michaelis, Andrew; Nemani, Ramakrishna R.] NASA, Biospher Sci Branch, Ames Res Ctr, Moffett Field, CA 94035 USA.
   [Rajagopalan, Balaji; Caldwell, Jason] Univ Colorado, Boulder, CO 80309 USA.
   [DeWitt, Lynn] SW Fisheries Sci Ctr, Natl Marine Fisheries Serv, Pacific Grove, CA 93950 USA.
RP Danner, EM (reprint author), SW Fisheries Sci Ctr, Natl Marine Fisheries Serv, Santa Cruz, CA 95060 USA.
EM eric.danner@noaa.gov
RI Rajagopalan, Balaji/A-5383-2013; Lindley, Steven/G-3997-2014
OI Rajagopalan, Balaji/0000-0002-6883-7240; Lindley,
   Steven/0000-0001-9556-0411
FU NASA [NNX08AK72G]; NOAA/NMFS Southwest Fisheries Science Center
FX This work was supported in part by NASA Applied Sciences Program's
   Ecological Forecasting Program Element (grant NNX08AK72G) and the
   NOAA/NMFS Southwest Fisheries Science Center.
NR 34
TC 5
Z9 5
U1 0
U2 25
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 1939-1404
J9 IEEE J-STARS
JI IEEE J. Sel. Top. Appl. Earth Observ. Remote Sens.
PD DEC
PY 2012
VL 5
IS 6
SI SI
BP 1752
EP 1760
DI 10.1109/JSTARS.2012.2229968
PG 9
WC Engineering, Electrical & Electronic; Geography, Physical; Remote
   Sensing; Imaging Science & Photographic Technology
SC Engineering; Physical Geography; Remote Sensing; Imaging Science &
   Photographic Technology
GA 063OL
UT WOS:000313009300020
ER

PT J
AU Zhao, PS
   Di, LP
   Han, WG
   Li, XY
AF Zhao, Peisheng
   Di, Liping
   Han, Weiguo
   Li, Xiaoyan
TI Building a Web-Services Based Geospatial Online Analysis System
SO IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE
   SENSING
LA English
DT Article
DE Service-Oriented Architecture; catalogue service; processing service;
   web service
AB Recent advances in geospatial Web services and Service-Oriented Architecture (SOA) are shifting geospatial data and analysis from the everything-locally-owned-and-operated paradigm to the everything-shared-over-the-Web paradigm. By embracing geospatial content and capabilities within the context of SOA, we have developed a Geospatial Online Analysis System (GeOnAS), a fully extensible system designed for discovery, retrieval, analysis, and visualization of geospatial and other network data based on Web services. GeOnAS also is built as an open and collaborative system capable of integrating distributed services to implement all required functions. The more users are involved, the more powerful the system becomes. GeOnAS provides values in its overall efficiency of integrating and analyzing distributed geospatial data over the Web.
C1 [Zhao, Peisheng; Han, Weiguo; Li, Xiaoyan] George Mason Univ, Ctr Spatial Informat Sci & Syst, Fairfax, VA 22030 USA.
   [Di, Liping] George Mason Univ, Ctr Spatial Informat Sci & Syst, Greenbelt, MD 20770 USA.
   [Zhao, Peisheng] NASA GSFC, Greenbelt, MD 20771 USA.
RP Zhao, PS (reprint author), George Mason Univ, Ctr Spatial Informat Sci & Syst, Fairfax, VA 22030 USA.
EM pzhao@gmu.edu; ldi@gmu.edu; whan@gmu.edu; xlia@gmu.edu
RI Han, Weiguo/N-1791-2014
OI Han, Weiguo/0000-0002-2760-0909
FU National Aeronautics and Space Administration (NASA) [NNG04GE61A]
FX This work is supported by a grant from the National Aeronautics and
   Space Administration (NASA) GeoBrain project (NNG04GE61A, PI: Dr. L.
   Di).
NR 27
TC 4
Z9 4
U1 1
U2 15
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 1939-1404
J9 IEEE J-STARS
JI IEEE J. Sel. Top. Appl. Earth Observ. Remote Sens.
PD DEC
PY 2012
VL 5
IS 6
SI SI
BP 1780
EP 1792
DI 10.1109/JSTARS.2012.2197372
PG 13
WC Engineering, Electrical & Electronic; Geography, Physical; Remote
   Sensing; Imaging Science & Photographic Technology
SC Engineering; Physical Geography; Remote Sensing; Imaging Science &
   Photographic Technology
GA 063OL
UT WOS:000313009300023
ER

PT J
AU Label, K
AF Label, Ken
TI Conference Comments by the General Chair
SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE
LA English
DT Editorial Material
C1 NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
RP Label, K (reprint author), NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
NR 0
TC 0
Z9 0
U1 0
U2 3
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9499
J9 IEEE T NUCL SCI
JI IEEE Trans. Nucl. Sci.
PD DEC
PY 2012
VL 59
IS 6
BP 2629
EP 2631
DI 10.1109/TNS.2012.2229576
PN 1
PG 3
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA 056JX
UT WOS:000312486000001
ER

PT J
AU Dodds, NA
   Hooten, NC
   Reed, RA
   Schrimpf, RD
   Warner, JH
   Roche, NJH
   McMorrow, D
   Wen, SJ
   Wong, R
   Salzman, JF
   Jordan, S
   Pellish, JA
   Marshall, CJ
   Gaspard, NJ
   Bennett, WG
   Zhang, EX
   Bhuva, BL
AF Dodds, N. A.
   Hooten, N. C.
   Reed, R. A.
   Schrimpf, R. D.
   Warner, J. H.
   Roche, N. J. -H.
   McMorrow, D.
   Wen, S. -J.
   Wong, R.
   Salzman, J. F.
   Jordan, S.
   Pellish, J. A.
   Marshall, C. J.
   Gaspard, N. J.
   Bennett, W. G.
   Zhang, E. X.
   Bhuva, B. L.
TI Effectiveness of SEL Hardening Strategies and the Latchup Domino Effect
SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE
LA English
DT Article; Proceedings Paper
CT IEEE Radiation Effects Data Workshop (REDW) is Part of the Nuclear and
   Space Radiation Effects Conference (NSREC)
CY JUL 16-20, 2012
CL Miami, FL
SP IEEE Nucl & Plasma Sci Soc, Inst Elect & Elect Engineers Inc (IEEE)
DE Guard ring; hardened by design; hardened by process; latchup spreading;
   latchup test structure; single event latchup; SOI; SRAM; triple well
ID PARTICLE-INDUCED LATCHUP; LASER-INDUCED LATCHUP; SINGLE-EVENT LATCHUP;
   TRIPLE-WELL; CMOS TECHNOLOGY; SOI TECHNOLOGIES; PULSED-LASER; HEAVY-ION;
   BULK CMOS; DEVICES
AB Heavy ion, neutron, and laser experimental data are used to evaluate the effectiveness of various single event latchup (SEL) hardening strategies, including silicon-on-insulator (SOI), triple well, and guard rings. Although SOI technology is widely reported to be immune to SEL, conventional pnpn latchup can occur and has been observed in non-dielectrically isolated SOI processes. Triple well technologies are shown to be more robust against SEL than dual well technologies under all conditions used in this study, suggesting that the introduction of a deep N-well is an excellent zero-area-penalty hardening strategy. A single guard ring is shown to be sufficient for SEL immunity in the 180 nm CMOS technology investigated, and is likely sufficient for more modern CMOS technologies.
   After triggering latchup in a certain pnpn region, latchup was observed to spread to neighboring pnpn regions, which then infected other more distant regions until it had spread over a total distance of 700 micrometers. We discuss the physical mechanism of this latchup domino effect and its implications for device characterization and hardness assurance.
C1 [Dodds, N. A.; Hooten, N. C.; Reed, R. A.; Schrimpf, R. D.; Gaspard, N. J.; Bennett, W. G.; Zhang, E. X.; Bhuva, B. L.] Vanderbilt Univ, Nashville, TN 37203 USA.
   [Warner, J. H.; Roche, N. J. -H.; McMorrow, D.] USN, Res Lab, Washington, DC 20375 USA.
   [Wen, S. -J.; Wong, R.] Cisco Syst Inc, San Jose, CA 95134 USA.
   [Salzman, J. F.] Texas Instruments Inc, Dallas, TX 75243 USA.
   [Jordan, S.] Jazz Semicond, Newport Beach, CA 92660 USA.
   [Pellish, J. A.; Marshall, C. J.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
RP Dodds, NA (reprint author), Sandia Natl Labs, Albuquerque, NM 87123 USA.
EM nadodds@sandia.gov
RI Schrimpf, Ronald/L-5549-2013
OI Schrimpf, Ronald/0000-0001-7419-2701
FU Defense Threat Reduction Agency [HDTRA1-08-1-0033, HDTRA1-08-1-0034];
   DTRA Radiation Hardened Microelectronics Program under IACRO [09-4587I];
   NASA Electronics Parts and Packaging Program; NASA Graduate Student
   Researchers Program; Jazz Semiconductor Aerospace and Defense Division
FX Manuscript received July 13, 2012; revised September 19, 2012; accepted
   October 06, 2012. Date of current version December 11, 2012. This work
   was supported in part by the Defense Threat Reduction Agency under
   HDTRA1-08-1-0033 and HDTRA1-08-1-0034, in part by the DTRA Radiation
   Hardened Microelectronics Program under IACRO #09-4587I to NASA, in part
   by the NASA Electronics Parts and Packaging Program, in part by the NASA
   Graduate Student Researchers Program, and in part by the Jazz
   Semiconductor Aerospace and Defense Division.
NR 48
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U1 0
U2 17
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9499
EI 1558-1578
J9 IEEE T NUCL SCI
JI IEEE Trans. Nucl. Sci.
PD DEC
PY 2012
VL 59
IS 6
BP 2642
EP 2650
DI 10.1109/TNS.2012.2224374
PN 1
PG 9
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA 056JX
UT WOS:000312486000002
ER

PT J
AU Allen, GR
   Adell, PC
   Chen, DK
   Musil, P
AF Allen, Gregory R.
   Adell, Philippe C.
   Chen, Dakai
   Musil, Paul
TI Single-Event Transient Testing of Low Dropout PNP Series Linear Voltage
   Regulators
SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE
LA English
DT Article; Proceedings Paper
CT IEEE Radiation Effects Data Workshop (REDW) is Part of the Nuclear and
   Space Radiation Effects Conference (NSREC)
CY JUL 16-20, 2012
CL Miami, FL
SP IEEE Nucl & Plasma Sci Soc, Inst Elect & Elect Engineers Inc (IEEE)
DE Equivalent series resistance; PNP series linear regulator; power
   systems; single event transient
ID PULSED-LASER; INTEGRATED-CIRCUITS; METHODOLOGY; DEVICES; MODEL; SETS
AB Recommendations are provided for Single Event Transient (SET) testing of low dropout (LDO) PNP series linear voltage regulators. A combination of SPICE circuit simulations and pulsed laser irradiations are used to demonstrate that the equivalent series resistance (ESR), loading conditions and regulator stability are the key elements that govern LDO regulator's SET response. Pulsed laser testing of several flight-like candidates shows similar SET trends and dependences. Due to the additional circuits introduced in an LDO design, we reveal the existence of a thermal shutdown mode that can be triggered by a single event that is also load dependent.
C1 [Allen, Gregory R.; Adell, Philippe C.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
   [Chen, Dakai] NASA, Goddard Space Flight Ctr, MEI Technol Inc, Greenbelt, MD 20771 USA.
   [Musil, Paul] MS Kennedy Corp, Liverpool, NY 13088 USA.
RP Allen, GR (reprint author), CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
EM grallen@jpl.nasa.gov; pcadell@jpl.nasa.gov; dakai.chen-1@nasa.gov;
   p.musil@mskennedy.com
FU National Aeronautics and Space Administration (NASA); NASA Electronic
   Parts and Packaging Program (NEPP)
FX Manuscript received July 13, 2012; revised September 13, 2012 and
   September 27, 2012; accepted September 27, 2012. Date of current version
   December 11, 2012. The research in this paper was carried out at the Jet
   Propulsion Laboratory, California Institute of Technology, Pasadena, CA,
   under contract with the National Aeronautics and Space Administration
   (NASA). This work was supported in part by the NASA Electronic Parts and
   Packaging Program (NEPP).
NR 23
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U1 2
U2 6
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9499
EI 1558-1578
J9 IEEE T NUCL SCI
JI IEEE Trans. Nucl. Sci.
PD DEC
PY 2012
VL 59
IS 6
BP 2764
EP 2771
DI 10.1109/TNS.2012.2222442
PN 1
PG 8
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA 056JX
UT WOS:000312486000017
ER

PT J
AU Oldham, TR
   Friendlich, MR
   Wilcox, EP
   LaBel, KA
   Buchner, SP
   McMorrow, D
   Mavis, DG
   Eaton, PH
   Castillo, J
AF Oldham, Timothy R.
   Friendlich, M. R.
   Wilcox, E. P.
   LaBel, K. A.
   Buchner, S. P.
   McMorrow, D.
   Mavis, D. G.
   Eaton, P. H.
   Castillo, J.
TI Correlation of Laser Test Results With Heavy Ion Results for NAND Flash
   Memory
SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE
LA English
DT Article; Proceedings Paper
CT IEEE Radiation Effects Data Workshop (REDW) is Part of the Nuclear and
   Space Radiation Effects Conference (NSREC)
CY JUL 16-20, 2012
CL Miami, FL
SP IEEE Nucl & Plasma Sci Soc, Inst Elect & Elect Engineers Inc (IEEE)
DE Radiation effects; Reliability; Flash memory; Nonvolatile memory;
   Lasers; reliability; Laser; NAND; nonvolatile memory; radiation effects
AB Pulsed laser test results for NAND flash memories are compared with broad beam heavy ion results and also with heavy ion results obtained with the collimated Milli-Beam (TM) source. The pulsed laser measurements reported here, with smaller focused spot sizes and as a function of the incident pulse energy, serve to reconcile the previously reported inconsistencies. The Milli-Beam (TM) and pulsed laser results appear to be consistent, and differences from the broad beam heavy ion results can be explained. The results suggest that the high current SEFIs reported by us and others arise from multiple ion (or multiple photon) interactions, and are not associated with single ion strikes.
C1 [Friendlich, M. R.; Wilcox, E. P.] NASA, Goddard Space Flight Ctr, MEI Technol, Greenbelt, MD 20771 USA.
   [Buchner, S. P.; McMorrow, D.] USN, Res Lab, Washington, DC 20375 USA.
   [Mavis, D. G.; Castillo, J.] Micro RDC Corp, Albuquerque, NM 87110 USA.
   [Eaton, P. H.] Micro RDC Corp, Colorado Springs, CO 80919 USA.
EM tim-othy.r.oldham@nasa.gov
FU NASA Electronic Parts and Packaging Program (NEPP); NASA Flight
   Projects; Defense Threat Reduction Agency (DTRA) under IACRO [11-4395I];
   NASA NEPP Program; DTRA Radiation Hardened Microelectronics Program
FX This work was supported in part by part by the NASA Electronic Parts and
   Packaging Program (NEPP), NASA Flight Projects, and the Defense Threat
   Reduction Agency (DTRA) under IACRO# 11-4395I.; The authors wish to
   thank their sponsors, the NASA NEPP Program (K. LaBel) and the DTRA
   Radiation Hardened Microelectronics Program (B. Wilson) for their
   support. They also wish to thank M. O'Bryan for technical assistance in
   preparing this manuscript and related presentation materials.
NR 8
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PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9499
EI 1558-1578
J9 IEEE T NUCL SCI
JI IEEE Trans. Nucl. Sci.
PD DEC
PY 2012
VL 59
IS 6
BP 2831
EP 2836
DI 10.1109/TNS.2012.2222046
PN 1
PG 6
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA 056JX
UT WOS:000312486000027
ER

PT J
AU Foster, CC
   O'Neill, PM
   Reddell, BD
   Nguyen, KV
   Jones, BH
   Roche, NJM
   Warner, J
   Buchner, S
AF Foster, Charles C.
   O'Neill, Patrick M.
   Reddell, Brandon D.
   Nguyen, Kyson V.
   Jones, Bailey. H.
   Roche, Nicolas Jean-Marie
   Warner, Jeffrey
   Buchner, Stephen
TI Certification of Parts for Space With the Variable Depth Bragg Peak
   Method
SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE
LA English
DT Article; Proceedings Paper
CT IEEE Radiation Effects Data Workshop (REDW) is Part of the Nuclear and
   Space Radiation Effects Conference (NSREC)
CY JUL 16-20, 2012
CL Miami, FL
SP IEEE Nucl & Plasma Sci Soc, Inst Elect & Elect Engineers Inc (IEEE)
DE Ions; Microelectronics; Certification; Silicon; Testing; Monitoring;
   Space technology; single event upset; Bragg peak; heavy ions; latchup
AB The Variable Depth Bragg Peak (VDBP) method uses long-range high-energy heavy ions to measure the Single Event Effect (SEE) cross-section as a function of linear energy transfer (LET(Si)) for commercially packaged integrated circuits with sensitive volumes at unknown depths. This is done by lowering the energy of the ions incident on the device-under-test (DUT) in steps, by insertion of polyethylene degraders of increasing thickness, until the maximum event cross-section is observed, which indicates that ions with the highest average LET(Si) (at the peak of the Bragg Peak) are depositing energy in the sensitive volume. The present paper describes use of the VDBP method to test for single event latchup (SEL) in packaged parts that do and do not fail catastrophically and to certify a device by assuring that every depth in the packaged device is exposed to a fluence of ions with average LET(Si) values greater than a specified value, in this case 60 MeV/mg/cm(2).
C1 [Foster, Charles C.] FCS LLC, University Pl, WA 98466 USA.
   [O'Neill, Patrick M.; Reddell, Brandon D.] NASA, Lyndon B Johnson Space Ctr, Houston, TX 77058 USA.
   [Nguyen, Kyson V.; Jones, Bailey. H.] Jacobs Technol, Houston, TX 77058 USA.
   [Roche, Nicolas Jean-Marie; Warner, Jeffrey; Buchner, Stephen] USN, Res Lab, Washington, DC 20375 USA.
RP Foster, CC (reprint author), FCS LLC, University Pl, WA 98466 USA.
EM fosterchc@nventure.com; patrick.m.oneill@nasa.gov;
   brandon.d.red-dell@nasa.gov; kyson.v.nguyen@nasa.gov;
   bailey.h.jones@nasa.gov
FU NASA/JSC; DTRA RHM program
FX This work was supported in part by NASA/JSC and in part by the DTRA RHM
   program.
NR 5
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PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9499
EI 1558-1578
J9 IEEE T NUCL SCI
JI IEEE Trans. Nucl. Sci.
PD DEC
PY 2012
VL 59
IS 6
BP 2909
EP 2913
DI 10.1109/TNS.2012.2224126
PN 1
PG 5
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA 056JX
UT WOS:000312486000038
ER

PT J
AU Ferlet-Cavrois, V
   Binois, C
   Carvalho, A
   Ikeda, N
   Inoue, M
   Eisener, B
   Gamerith, S
   Chaumont, G
   Pintacuda, F
   Javanainen, A
   Schwank, JR
   Shaneyfelt, MR
   Lauenstein, JM
   Ladbury, RL
   Muschitiello, M
   Poivey, C
   Mohammadzadeh, A
AF Ferlet-Cavrois, Veronique
   Binois, Christian
   Carvalho, Aminata
   Ikeda, Naomi
   Inoue, Masanori
   Eisener, Bernd
   Gamerith, Stefan
   Chaumont, Geraldine
   Pintacuda, Francesco
   Javanainen, Arto
   Schwank, James R.
   Shaneyfelt, Marty R.
   Lauenstein, Jean-Marie
   Ladbury, Raymond L.
   Muschitiello, Michele
   Poivey, Christian
   Mohammadzadeh, Ali
TI Statistical Analysis of Heavy-Ion Induced Gate Rupture in Power
   MOSFETs-Methodology for Radiation Hardness Assurance
SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE
LA English
DT Article; Proceedings Paper
CT IEEE Radiation Effects Data Workshop (REDW) is Part of the Nuclear and
   Space Radiation Effects Conference (NSREC)
CY JUL 16-20, 2012
CL Miami, FL
SP IEEE Nucl & Plasma Sci Soc, Inst Elect & Elect Engineers Inc (IEEE)
DE Space technology; Radiation effects; Power MOSFET; Dielectric breakdown;
   Capacitors; Radiation hardening; Statistical analysis; time dependant
   dielectric breakdown; Heavy ions; power MOSFETs; radiation hardness
   assurance; single event gate rupture
ID SPIKE MECHANISM; OXIDES; SIO2; RELIABILITY; IRRADIATION; TRACKS; SEGR;
   BREAKDOWN; DMOSFETS; ENERGY
AB A methodology for power MOSFET radiation hardness assurance is proposed. It is based on the statistical analysis of destructive events, such as gate oxide rupture. Examples of failure rate calculations are performed.
C1 [Ferlet-Cavrois, Veronique; Muschitiello, Michele; Poivey, Christian; Mohammadzadeh, Ali] European Space Agcy, ESTEC, NL-2200 AG Noordwijk, Netherlands.
   [Binois, Christian; Carvalho, Aminata] EADS Astrium, F-78990 Elancourt, France.
   [Ikeda, Naomi] Japan Aerosp Explorat Agcy, Tsukuba, Ibaraki 3058505, Japan.
   [Inoue, Masanori] Fuji Elect Co Ltd, Matsumoto, Nagano 3900821, Japan.
   [Eisener, Bernd] Infineon Technol AG, D-85579 Neubiberg, Germany.
   [Gamerith, Stefan] Infineon Technol Austria AG, A-9500 Villach, Austria.
   [Chaumont, Geraldine] STMicroelectronics, F-35208 Rennes 2, France.
   [Pintacuda, Francesco] STMicroelectronics, I-95121 Catania, Italy.
   [Javanainen, Arto] Univ Jyvaskyla, Dept Phys, FI-40014 Jyvaskyla, Finland.
   [Schwank, James R.; Shaneyfelt, Marty R.] Sandia Natl Labs, Albuquerque, NM 87185 USA.
   [Lauenstein, Jean-Marie; Ladbury, Raymond L.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
RP Ferlet-Cavrois, V (reprint author), European Space Agcy, ESTEC, NL-2200 AG Noordwijk, Netherlands.
EM Veronique.Ferlet-Cavrois@esa.int
RI Javanainen, Arto/P-6355-2016
OI Javanainen, Arto/0000-0001-7906-3669
FU ESA/ESTEC [106795/12/NL/PA, 22328/09/NL/PA, 18197/04/NL/CP]; Defense
   Threat Reduction Agency; U.S. Department of Energy; U.S. Department of
   Energy's National Nuclear Security Administration [DE-AC04-94AL85000]
FX The part of this work performed at ESA (European Space Agency) or under
   ESA responsibility was supported by the ESA/ESTEC contracts,
   106795/12/NL/PA, 22328/09/NL/PA and 18197/04/NL/CP. The part of this
   work performed at Sandia National Laboratories was supported by the
   Defense Threat Reduction Agency. Part of the work performed at Sandia
   National Laboratories was also supported by the U.S. Department of
   Energy. Sandia is a multiprogram laboratory operated by Sandia
   Corporation, a Lockheed Martin Company, for the U.S. Department of
   Energy's National Nuclear Security Administration under Contract
   DE-AC04-94AL85000.
NR 41
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U2 7
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9499
EI 1558-1578
J9 IEEE T NUCL SCI
JI IEEE Trans. Nucl. Sci.
PD DEC
PY 2012
VL 59
IS 6
BP 2920
EP 2929
DI 10.1109/TNS.2012.2223761
PN 1
PG 10
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA 056JX
UT WOS:000312486000040
ER

PT J
AU Edmonds, LD
   Scheick, LZ
   Banker, MW
AF Edmonds, Larry D.
   Scheick, Leif Z.
   Banker, Mackenzie W.
TI Single Event Rates for Devices Sensitive to Particle Energy
SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE
LA English
DT Article; Proceedings Paper
CT IEEE Radiation Effects Data Workshop (REDW) is Part of the Nuclear and
   Space Radiation Effects Conference (NSREC)
CY JUL 16-20, 2012
CL Miami, FL
SP IEEE Nucl & Plasma Sci Soc, Inst Elect & Elect Engineers Inc (IEEE)
DE Space technology; Energy exchange; Cosmic rays; MOSFETs; Upper bound;
   stopping rate; single event gate rupture (SEGR); single event rate
ID DMOSFETS; SEGR
AB Single event rates (SER) can include contributions from low-energy particles such that the linear energy transfer (LET) is not constant. Previous work found that the environmental description that is most relevant to the low-energy contribution to the rate is a "stopping rate per unit volume" even when the physical mechanisms for a single-event effect do not require an ion to stop in some device region. Stopping rate tables are presented for four heavy-ion environments that are commonly used to assess device suitability for space applications. A conservative rate estimate utilizing limited test data is derived, and the example of SEGR rate in a power MOSFET is presented.
C1 [Scheick, Leif Z.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
   [Banker, Mackenzie W.] Univ Florida, Dept Elect Engn, Gainesville, FL 32611 USA.
EM leif.z.scheick@jpl.nasa.gov; Mbanker@ufl.edu
NR 10
TC 1
Z9 1
U1 0
U2 1
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9499
EI 1558-1578
J9 IEEE T NUCL SCI
JI IEEE Trans. Nucl. Sci.
PD DEC
PY 2012
VL 59
IS 6
BP 2936
EP 2944
DI 10.1109/TNS.2012.2223826
PN 1
PG 9
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA 056JX
UT WOS:000312486000042
ER

PT J
AU Johnston, AH
   Swimm, RT
   Thorbourn, DO
AF Johnston, A. H.
   Swimm, R. T.
   Thorbourn, D. O.
TI Total Dose Effects on Bipolar Integrated Circuits at Low Temperature
SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE
LA English
DT Article; Proceedings Paper
CT IEEE Radiation Effects Data Workshop (REDW) is Part of the Nuclear and
   Space Radiation Effects Conference (NSREC)
CY JUL 16-20, 2012
CL Miami, FL
SP IEEE Nucl & Plasma Sci Soc, Inst Elect & Elect Engineers Inc (IEEE)
DE Bipolar integrated circuits; Temperature dependence; Temperature
   measurement; Radiation effects; Doping; Space technology; total dose
   effects; Linear integrated circuits; low temperature; space radiation
ID HOLE TRANSPORT; FIELD OXIDES; DEVICES; RECOMBINATION; PERFORMANCE;
   TRANSISTORS; SIO2
AB Total dose damage in bipolar integrated circuits is investigated at low temperature, along with the temperature dependence of the electrical parameters of internal transistors. Bandgap narrowing causes the gain of npn transistors to decrease far more at low temperature compared to pnp transistors, due to the large difference in emitter doping concentration. When irradiations are done at temperatures of -138 degrees C, no damage occurs until devices are warmed to temperatures above -50 degrees C. After warm-up, subsequent cooling shows that damage is then present at low temperature, although it is much less than for room temperature irradiation. This can be explained by the temperature dependence of dispersive transport in the continuous-time-random-walk model, along with the reduction in charge yield at low temperature. For linear integrated circuits, low temperature operation is affected by the strong temperature dependence of npn transistors along with the higher sensitivity of lateral and substrate pnp transistors to radiation damage.
C1 [Johnston, A. H.; Swimm, R. T.; Thorbourn, D. O.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
RP Johnston, AH (reprint author), CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
EM allan.h.johnston@jpl.nasa.gov; randall.t.swimm@jpl.nasa.gov;
   dennis.thorbourn@jpl.nasa.gov
NR 24
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U1 1
U2 9
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9499
EI 1558-1578
J9 IEEE T NUCL SCI
JI IEEE Trans. Nucl. Sci.
PD DEC
PY 2012
VL 59
IS 6
BP 2995
EP 3003
DI 10.1109/TNS.2012.2219592
PN 1
PG 9
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA 056JX
UT WOS:000312486000050
ER

PT J
AU Oldham, TR
   Chen, D
   Friendlich, MR
   LaBel, KA
AF Oldham, Timothy R.
   Chen, Dakai
   Friendlich, Mark R.
   LaBel, Kenneth A.
TI Retention Characteristics of Commercial NAND Flash Memory After
   Radiation Exposure
SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE
LA English
DT Article; Proceedings Paper
CT IEEE Radiation Effects Data Workshop (REDW) is Part of the Nuclear and
   Space Radiation Effects Conference (NSREC)
CY JUL 16-20, 2012
CL Miami, FL
SP IEEE Nucl & Plasma Sci Soc, Inst Elect & Elect Engineers Inc (IEEE)
DE CMOS; nonvolatile memory; radiation effects; reliability; retention
ID MODEL
AB We have compared the data retention of irradiated commercial NAND flash memories at different doses. Activation energies for retention testing at high temperature have also been determined.
C1 [Oldham, Timothy R.] Dell Serv Fed Govt Inc, Greenbelt, MD 20771 USA.
   [Chen, Dakai; LaBel, Kenneth A.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
   [Friendlich, Mark R.] MEI Technol Inc, Houston, TX 77058 USA.
RP Oldham, TR (reprint author), Dell Serv Fed Govt Inc, Greenbelt, MD 20771 USA.
EM timothy.r.oldham@nasa.gov
FU NASA Electronic Parts and Packaging Program (NEPP); NASA Flight
   Projects; Defense Threat Reduction Agency (DTRA) under IACRO [11-4395I];
   NASA NEPP program
FX This work was supported in part by part by the NASA Electronic Parts and
   Packaging Program (NEPP), in part by the NASA Flight Projects, and in
   part by the Defense Threat Reduction Agency (DTRA) under IACRO#
   11-4395I; The authors would like to thank K. LaBel and the NASA NEPP
   program, and B. Wilson of DTRA for their support of this work; M.
   O'Bryan for technical assistance in preparing this manuscript; and R.
   Leodore of Micross Corp. for his help in obtaining the Samsung 8G parts,
   which were critical to this experiment.
NR 9
TC 3
Z9 3
U1 0
U2 2
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9499
EI 1558-1578
J9 IEEE T NUCL SCI
JI IEEE Trans. Nucl. Sci.
PD DEC
PY 2012
VL 59
IS 6
BP 3011
EP 3015
DI 10.1109/TNS.2012.2221144
PN 1
PG 5
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA 056JX
UT WOS:000312486000052
ER

PT J
AU Adell, PC
   Esqueda, IS
   Barnaby, HJ
   Rax, B
   Johnston, AH
AF Adell, Philippe C.
   Esqueda, Ivan S.
   Barnaby, Hugh J.
   Rax, Bernard
   Johnston, Allan H.
TI Impact of Low Temperatures (< 125 K) on the Total Ionizing Dose Response
   and ELDRS in Gated Lateral PNP BJTs
SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE
LA English
DT Article; Proceedings Paper
CT IEEE Radiation Effects Data Workshop (REDW) is Part of the Nuclear and
   Space Radiation Effects Conference (NSREC)
CY JUL 16-20, 2012
CL Miami, FL
SP IEEE Nucl & Plasma Sci Soc, Inst Elect & Elect Engineers Inc (IEEE)
DE Cryogenic; ELDRS; gated lateral PNP; hole transport; total dose; yield
ID RATE SENSITIVITY; HOLE TRANSPORT; RELIABILITY; ELECTRONICS; TRANSISTOR;
   OPERATION; CIRCUITS; MISSIONS; DESIGN
AB Total ionizing dose characteristics and dose rate dependence are evaluated under low temperature conditions for gated lateral PNP bipolar junction transistors. The results show that the dose rate sensitivity of the examined linear bipolar circuit technology is reduced when irradiations are performed at low temperature. The results are supported by numerical simulations that model low temperature behaviors through the suppression of hole and proton transport in the irradiated oxide. These findings agree well with previous studies of CMOS technologies, which reported on the time and bias dependence of defect buildup in MOS capacitors and transistors. This study of temperature effects on the total dose and dose rate response of PNP BJTs expands upon these works by examining the impact of low temperature on ELDRS in bipolar technologies.
C1 [Adell, Philippe C.; Rax, Bernard; Johnston, Allan H.] CALTECH, Jet Prop Lab, Pasadena, CA 91101 USA.
   [Esqueda, Ivan S.] USC Informat Sci Inst, Arlington, VA 22030 USA.
   [Barnaby, Hugh J.] Arizona State Univ, Tempe, AZ USA.
RP Adell, PC (reprint author), CALTECH, Jet Prop Lab, Pasadena, CA 91101 USA.
EM philippe.c.adell@jpl.nasa.gov; isanchez@isi.edu; hbarnaby@asu.edu
FU NASA Electronic and Packaging Program (NEPP); NASA Electronic Parts and
   Packaging Program (NEPP)
FX The authors wish to thank the NASA Electronic and Packaging Program
   (NEPP) for their support as well as the Office of Chief Scientist and
   Technologist at JPL.; This work was supported in part by the NASA
   Electronic Parts and Packaging Program (NEPP). The research was carried
   out by the Jet Propulsion Laboratory, California Institute of
   Technology, Pasadena, under the NASA Electronic Parts and Packaging
   Program (NEPP).
NR 22
TC 5
Z9 7
U1 0
U2 7
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9499
EI 1558-1578
J9 IEEE T NUCL SCI
JI IEEE Trans. Nucl. Sci.
PD DEC
PY 2012
VL 59
IS 6
BP 3081
EP 3086
DI 10.1109/TNS.2012.2224372
PN 1
PG 6
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA 056JX
UT WOS:000312486000063
ER

PT J
AU Adams, JH
   Barghouty, AF
   Mendenhall, MH
   Reed, RA
   Sierawski, BD
   Warren, KM
   Watts, JW
   Weller, RA
AF Adams, J. H., Jr.
   Barghouty, A. F.
   Mendenhall, M. H.
   Reed, R. A.
   Sierawski, B. D.
   Warren, K. M.
   Watts, J. W.
   Weller, R. A.
TI CREME: The 2011 Revision of the Cosmic Ray Effects on Micro-Electronics
   Code
SO IEEE TRANSACTIONS ON NUCLEAR SCIENCE
LA English
DT Article; Proceedings Paper
CT IEEE Radiation Effects Data Workshop (REDW) is Part of the Nuclear and
   Space Radiation Effects Conference (NSREC)
CY JUL 16-20, 2012
CL Miami, FL
SP IEEE Nucl & Plasma Sci Soc, Inst Elect & Elect Engineers Inc (IEEE)
DE Geant4; ionizing radiation; Monte Carlo methods; MRED; rate prediction;
   single event effects; space technology
ID PARTICLE EVENTS; RATE PREDICTION; SOLAR; MODEL; ENVIRONMENT; SIMULATION;
   SPACE
AB We describe a tool suite, CREME, which combines existing capabilities of CREME96 and CREME86 with new radiation environment models and new Monte Carlo computational capabilities for single event effects and total ionizing dose.
C1 [Adams, J. H., Jr.; Barghouty, A. F.; Watts, J. W.] NASA, Marshall Space Flight Center, Huntsville, AL 35812 USA.
   [Mendenhall, M. H.; Reed, R. A.; Sierawski, B. D.; Warren, K. M.; Weller, R. A.] Vanderbilt Univ, Nashville, TN 37240 USA.
RP Adams, JH (reprint author), Univ Alabama, Ctr Space Plasma & Aeron Res, Huntsville, AL 35805 USA.
FU Autonomous Systems and Avionic Project of NASA's ETDD Program; Defense
   Threat Reduction Agency Basic Research Program; NASA Electronic Parts
   and Packaging Program
FX This work was supported in part by the Autonomous Systems and Avionic
   Project of NASA's ETDD Program, by the Defense Threat Reduction Agency
   Basic Research Program, and by the NASA Electronic Parts and Packaging
   Program.
NR 26
TC 12
Z9 14
U1 0
U2 9
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9499
EI 1558-1578
J9 IEEE T NUCL SCI
JI IEEE Trans. Nucl. Sci.
PD DEC
PY 2012
VL 59
IS 6
BP 3141
EP 3147
DI 10.1109/TNS.2012.2218831
PN 1
PG 7
WC Engineering, Electrical & Electronic; Nuclear Science & Technology
SC Engineering; Nuclear Science & Technology
GA 056JX
UT WOS:000312486000071
ER

PT J
AU Mazets, EP
   Aptekar, RL
   Golenetskii, SV
   Cline, TL
   Oleinik, FP
   Svinkin, DS
   Ulanov, MV
   Frederiks, DD
   Tsvetkova, AE
AF Mazets, E. P.
   Aptekar, R. L.
   Golenetskii, S. V.
   Cline, T. L.
   Oleinik, F. P.
   Svinkin, D. S.
   Ulanov, M. V.
   Frederiks, D. D.
   Tsvetkova, A. E.
TI Studies of cosmic gamma-ray bursts and soft gamma repeaters in the
   Russian-American Konus-Wind experiment
SO JETP LETTERS
LA English
DT Article
ID 28 FEBRUARY 1997; RECURRENT BURSTS; SGR 1900+14; FLARE; EMISSION
AB The studies of the cosmic gamma-ray bursts and soft gamma repeaters that have been performed in the Russian-American Konus-Wind experiment during the last several years have been summarized. The experiment has been continuously performed using the Konus Russian scientific instrument on the Wind American spacecraft since 1994 under the optimal interplanetary space conditions in the absence of noise caused by the Earth's radiation belts and the shadowing of detectors. Two high-sensitivity detectors have constantly observed the entire celestial sphere and recorded detailed time and spectral characteristics of bursts in a wide range of energies (20 keV-15 MeV). The Konus-Wind data have been widely used in the present-day multiwave studies of gamma-ray bursts.
C1 [Mazets, E. P.; Aptekar, R. L.; Golenetskii, S. V.; Oleinik, F. P.; Svinkin, D. S.; Ulanov, M. V.; Frederiks, D. D.; Tsvetkova, A. E.] Russian Acad Sci, AF Ioffe Phys Tech Inst, St Petersburg 194021, Russia.
   [Cline, T. L.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
RP Mazets, EP (reprint author), Russian Acad Sci, AF Ioffe Phys Tech Inst, Politekhn Skaya Ul 26, St Petersburg 194021, Russia.
EM aptekar@mail.ioffe.ru
RI Aptekar, Raphail/B-3456-2015; Golenetskii, Sergey/B-3818-2015; Oleynik,
   Philipp/C-1104-2014; Svinkin, Dmitry/C-1934-2014; Frederiks,
   Dmitry/C-7612-2014; Ulanov, Mikhail/B-3467-2015
OI Frederiks, Dmitry/0000-0002-1153-6340; Ulanov,
   Mikhail/0000-0002-0076-5228
FU state contract of the Federal Space Agency; Russian Foundation for Basic
   Research [09-02-00166-a, 09-02-12080-ofi-m, 11-02-12082-ofi-m-2011,
   12-02-00032-a]
FX This work was supported by the state contract of the Federal Space
   Agency and Russian Foundation for Basic Research (project nos.
   09-02-00166-a, 09-02-12080-ofi-m, 11-02-12082-ofi-m-2011, and
   12-02-00032-a).
NR 47
TC 2
Z9 2
U1 0
U2 5
PU MAIK NAUKA/INTERPERIODICA/SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013-1578 USA
SN 0021-3640
J9 JETP LETT+
JI Jetp Lett.
PD DEC
PY 2012
VL 96
IS 8
BP 544
EP 553
DI 10.1134/S002136401220012X
PG 10
WC Physics, Multidisciplinary
SC Physics
GA 061VX
UT WOS:000312879400013
ER

PT J
AU Getirana, ACV
   Boone, A
   Yamazaki, D
   Decharme, B
   Papa, F
   Mognard, N
AF Getirana, Augusto C. V.
   Boone, Aaron
   Yamazaki, Dai
   Decharme, Bertrand
   Papa, Fabrice
   Mognard, Nelly
TI The Hydrological Modeling and Analysis Platform (HyMAP): Evaluation in
   the Amazon Basin
SO JOURNAL OF HYDROMETEOROLOGY
LA English
DT Article
ID GLOBAL DATABASE; CLIMATE MODELS; RIVER FLOW; RESOLUTION; SCHEME; DEM;
   VALIDATION; WETLANDS; IMPACT; SCALE
AB Recent advances in global flow routing schemes have shown the importance of using high-resolution topography for representing floodplain inundation dynamics more reliably. This study presents and evaluates the Hydrological Modeling and Analysis Platform (HyMAP), which is a global flow routing scheme specifically designed to bridge the gap between current state-of-the-art global flow routing schemes by combining their main features and introducing new features to better capture floodplain dynamics. The ultimate goals of HyMAP are to provide the scientific community with a novel scheme suited to the assimilation of satellite altimetry data for global water discharge forecasts and a model that can be potentially coupled with atmospheric models. In this first model evaluation, HyMAP is coupled with the Interactions between Soil-Biosphere-Atmosphere (ISBA) land surface model in order to simulate the surface water dynamics in the Amazon basin. The model is evaluated over the 1986-2006 period against an unprecedented source of information, including in situ and satellite-based datasets of water discharge and level, flow velocity, and floodplain extent. Results show that the model can satisfactorily simulate the large-scale features of the water surface dynamics of the Amazon River basin. Among all stream gauges considered, 23% have Nash-Sutcliffe coefficients (NS) higher than 0.50 and 68% above zero. About 28% of the stations have volume errors lower than 15%. Simulated discharges at Obidos had NS = 0.89. Time series of simulated floodplains at the basin scale agrees well with satellite-based estimates, with a relative error of 7% and correlation of 0.89. These results indicate nonnegligible improvements in comparison to previous studies for the same region.
C1 [Getirana, Augusto C. V.; Papa, Fabrice; Mognard, Nelly] CNRS, LEGOS CNES, IRD, UPS, Toulouse, France.
   [Getirana, Augusto C. V.; Boone, Aaron; Decharme, Bertrand] CNRM, GAME Meteo France, Toulouse, France.
   [Yamazaki, Dai] Univ Tokyo, Tokyo, Japan.
RP Getirana, ACV (reprint author), NASA, Hydrol Sci Lab, Goddard Space Flight Ctr, 8800 Greenbelt Rd, Greenbelt, MD 20771 USA.
EM augusto.getirana@nasa.gov
RI Papa, Fabrice/D-3695-2009; Yamazaki, Dai/J-3029-2012; Getirana,
   Augusto/G-4630-2011; Getirana, Augusto/A-6146-2010
OI Papa, Fabrice/0000-0001-6305-6253; Yamazaki, Dai/0000-0002-6478-1841; 
FU Centre National d'Etudes Spatiales (CNES)
FX The first author would like to thank the Centre National d'Etudes
   Spatiales (CNES) for the financial support. The study benefited from
   data made available by Agencia Nacional de Aguas (ANA) and by the
   European Space Agency (ESA) under the form of Geophysical Data Records
   (GDRs). The multimission database of GDRs is maintained by the Centre de
   Topographie des Oceans et de l'Hydrosphere (CTOH) at LEGOS. Grateful
   acknowledgments are also due to G. Cochonneau (IRD), M.C. Gennero
   (LEGOS). and R. Alkama (Meteo-France) for their help in data acquisition
   and processing and P. Bates (Univ. Bristol) and an anonymous reviewer
   for their valuable comments.
NR 47
TC 24
Z9 24
U1 1
U2 23
PU AMER METEOROLOGICAL SOC
PI BOSTON
PA 45 BEACON ST, BOSTON, MA 02108-3693 USA
SN 1525-755X
J9 J HYDROMETEOROL
JI J. Hydrometeorol.
PD DEC
PY 2012
VL 13
IS 6
BP 1641
EP 1665
DI 10.1175/JHM-D-12-021.1
PG 25
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 058JA
UT WOS:000312628700001
ER

PT J
AU Xu, YS
   Fu, LL
AF Xu, Yongsheng
   Fu, Lee-Lueng
TI The Effects of Altimeter Instrument Noise on the Estimation of the
   Wavenumber Spectrum of Sea Surface Height
SO JOURNAL OF PHYSICAL OCEANOGRAPHY
LA English
DT Article
AB The wavenumber spectrum of sea surface height (SSH) observed by satellite altimetry was analyzed by Xu and Fu. The spectral shape in the wavelength range of 70-250 km was approximated by a power law, representing a regime governed by geostrophic turbulence theories. The effects of altimeter instrument noise were assumed insignificant at wavelengths longer than 70 km. The authors reexamined the assumption in the study. Using nearly simultaneous observations made by Jason-1 and Jason-2 during their cross-calibration phase, this study found that the white noise level of altimetry measurement was best estimated from the spectral values at wavelengths from 25 to 35 km. After removing a white noise level based on such estimate from the SSH spectrum, the spectral slope values changed significantly over most of the oceans. A key finding is that the spectral slopes are generally steeper than k(-2) (k is wavenumber) poleward of the 20 degrees latitudes, where flatter spectral slopes in some regions have previously caused problems for dynamic interpretations. The new results indicate that the spectral slopes in the core regions of the major ocean current systems have values between the original geostrophic turbulence theory and the surface quasigeostrophic theory. The near k(-4) spectrum suggests that the sea surface height variability at these wavelengths in the high eddy energy regions might be governed by frontogenesis.
C1 [Xu, Yongsheng] Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China.
   [Fu, Lee-Lueng] CALTECH, Jet Prop Lab, Pasadena, CA USA.
RP Xu, YS (reprint author), Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao, Peoples R China.
EM yongsheng.xu@qdio.ac.cn
FU National Aeronautic and Space Administration; Jason-1; OSTM/Jason-2; CAS
   [Y22114101Q]; China 973 Project [2012CB956000]
FX The research presented in the paper was partly (LLF) carried out at the
   Jet Propulsion Laboratory, California Institute of Technology, under
   contract with the National Aeronautic and Space Administration. Support
   from the Jason-1 and OSTM/Jason-2 Projects is acknowledged. This work
   was partly supported by CAS Innovation Program Y22114101Q and the China
   973 Project 2012CB956000.
NR 7
TC 24
Z9 24
U1 1
U2 14
PU AMER METEOROLOGICAL SOC
PI BOSTON
PA 45 BEACON ST, BOSTON, MA 02108-3693 USA
SN 0022-3670
J9 J PHYS OCEANOGR
JI J. Phys. Oceanogr.
PD DEC
PY 2012
VL 42
IS 12
BP 2229
EP 2233
DI 10.1175/JPO-D-12-0106.1
PG 5
WC Oceanography
SC Oceanography
GA 064EN
UT WOS:000313054800009
ER

PT J
AU Dlugach, JM
   Mishchenko, MI
   Mackowski, DW
AF Dlugach, Janna M.
   Mishchenko, Michael I.
   Mackowski, Daniel W.
TI Scattering and absorption properties of polydisperse wavelength-sized
   particles covered with much smaller grains
SO JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
LA English
DT Article; Proceedings Paper
CT 13th Conference on Electromagnetic and Light Scattering (ELS)
CY SEP 26-30, 2011
CL Taormina, ITALY
SP Dipartimento Fisica della Materia Ingn Elettronica, Univ Messina, Consiglio Nazl delle Ric, Ist Processi Chimico Fisici (CNR-IPCF), Accademia Peloritana Pericolanti, U S Army Int Technol Ctr-Atlantic Res Div (USAITC-A), U S Off Naval Res Global-Conf Support Program (ONR-CSP), Fondazione Bonino-Pulejo (FBP), NanoAntenna European Res Project
DE Maxwell equations; Electromagnetic scattering; Polarization; Scattering
   and absorption characteristics; Small-scale surface roughness;
   Wavelength-sized particles
ID LIGHT-SCATTERING; NONSPHERICAL PARTICLES; SURFACE-ROUGHNESS;
   SPECIAL-ISSUE; T-MATRIX; AEROSOLS
AB Using the results of direct, numerically exact computer solutions of the Maxwell equations, we analyze scattering and absorption characteristics of polydisperse compound particles in the form of wavelength-sized spheres covered with a large number of much smaller spherical grains. The results pertain to the complex refractive indices 1.55+i0.0003, 1.55+i0.3, and 3+i0.1. We show that the optical effects of "dusting" wavelength-sized hosts by microscopic grains can vary depending on the number and size of the grains as well as on the complex refractive index. Our computations also demonstrate the high efficiency of the new superposition T-matrix code developed for use on distributed memory computer clusters. Published by Elsevier Ltd.
C1 [Mishchenko, Michael I.] NASA, Goddard Inst Space Studies, New York, NY 10025 USA.
   [Dlugach, Janna M.] Natl Acad Sci Ukraine, Main Astron Observ, UA-03680 Kiev, Ukraine.
   [Mackowski, Daniel W.] Auburn Univ, Dept Mech Engn, Auburn, AL 36849 USA.
RP Mishchenko, MI (reprint author), NASA, Goddard Inst Space Studies, 2880 Broadway, New York, NY 10025 USA.
EM michael.i.mishchenko@nasa.gov
RI Mackowski, Daniel/K-1917-2013; Mishchenko, Michael/D-4426-2012
NR 33
TC 9
Z9 9
U1 0
U2 15
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0022-4073
EI 1879-1352
J9 J QUANT SPECTROSC RA
JI J. Quant. Spectrosc. Radiat. Transf.
PD DEC
PY 2012
VL 113
IS 18
SI SI
BP 81
EP 85
DI 10.1016/j.jqsrt.2012.03.006
PG 5
WC Optics; Spectroscopy
SC Optics; Spectroscopy
GA 059DX
UT WOS:000312685700007
ER

PT J
AU Alexandrov, MD
   Cairns, B
   Mishchenko, MI
AF Alexandrov, Mikhail D.
   Cairns, Brian
   Mishchenko, Michael I.
TI Rainbow Fourier transform
SO JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER
LA English
DT Article; Proceedings Paper
CT 13th Conference on Electromagnetic and Light Scattering (ELS)
CY SEP 26-30, 2011
CL Taormina, ITALY
SP Dipartimento Fisica della Materia Ingn Elettronica, Univ Messina, Consiglio Nazl delle Ric, Ist Processi Chimico Fisici (CNR-IPCF), Accademia Peloritana Pericolanti, U S Army Int Technol Ctr-Atlantic Res Div (USAITC-A), U S Off Naval Res Global-Conf Support Program (ONR-CSP), Fondazione Bonino-Pulejo (FBP), NanoAntenna European Res Project
DE Electromagnetic scattering; Polarization; Mie theory; Rainbow; Optical
   particle characterization; Remote sensing
ID PART II; SCATTERING; RETRIEVAL; AEROSOL; POLARIMETER; LIGHT
AB We present a novel technique for remote sensing of cloud droplet size distributions. Polarized reflectances in the scattering angle range between 135 degrees and 165 degrees exhibit a sharply defined rainbow structure, the shape of which is determined mostly by single scattering properties of cloud particles, and therefore, can be modeled using the Mie theory. Fitting the observed rainbow with such a model (computed for a parameterized family of particle size distributions) has been used for cloud droplet size retrievals. We discovered that the relationship between the rainbow structures and the corresponding particle size distributions is deeper than it had been commonly understood. In fact, the Mie theory-derived polarized reflectance as a function of reduced scattering angle (in the rainbow angular range) and the (monodisperse) particle radius appears to be a proxy to a kernel of an integral transform (similar to the sine Fourier transform on the positive semi-axis). This approach, called the rainbow Fourier transform (RFT), allows us to accurately retrieve the shape of the droplet size distribution by the application of the corresponding inverse transform to the observed polarized rainbow. While the basis functions of the proxy-transform are not exactly orthogonal in the finite angular range, this procedure needs to be complemented by a simple regression technique, which removes the retrieval artifacts. This non-parametric approach does not require any a priori knowledge of the droplet size distribution functional shape and is computationally fast (no look-up tables, no fitting, computations are the same as for the forward modeling). (C) 2012 Elsevier Ltd. All rights reserved.
C1 [Alexandrov, Mikhail D.] Columbia Univ, Dept Appl Phys & Appl Math, New York, NY 10025 USA.
   [Alexandrov, Mikhail D.; Cairns, Brian; Mishchenko, Michael I.] NASA, Goddard Inst Space Studies, New York, NY 10025 USA.
RP Alexandrov, MD (reprint author), Columbia Univ, Dept Appl Phys & Appl Math, 2880 Broadway, New York, NY 10025 USA.
EM mda14@columbia.edu
RI Mishchenko, Michael/D-4426-2012; 
OI Cairns, Brian/0000-0002-1980-1022
NR 24
TC 6
Z9 6
U1 0
U2 14
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0022-4073
J9 J QUANT SPECTROSC RA
JI J. Quant. Spectrosc. Radiat. Transf.
PD DEC
PY 2012
VL 113
IS 18
SI SI
BP 251
EP 265
DI 10.1016/j.jqsrt.2012.03.025
PG 15
WC Optics; Spectroscopy
SC Optics; Spectroscopy
GA 059DX
UT WOS:000312685700026
ER

PT J
AU Borup, KA
   Toberer, ES
   Zoltan, LD
   Nakatsukasa, G
   Errico, M
   Fleurial, JP
   Iversen, BB
   Snyder, GJ
AF Borup, Kasper A.
   Toberer, Eric S.
   Zoltan, Leslie D.
   Nakatsukasa, George
   Errico, Michael
   Fleurial, Jean-Pierre
   Iversen, Bo B.
   Snyder, G. Jeffrey
TI Measurement of the electrical resistivity and Hall coefficient at high
   temperatures
SO REVIEW OF SCIENTIFIC INSTRUMENTS
LA English
DT Article
ID THERMOELECTRIC PROPERTIES; EFFECT APPARATUS; SEMICONDUCTORS; PULSE
AB The implementation of the van der Pauw (VDP) technique for combined high temperature measurement of the electrical resistivity and Hall coefficient is described. The VDP method is convenient for use since it accepts sample geometries compatible with other measurements. The technique is simple to use and can be used with samples showing a broad range of shapes and physical properties, from near insulators to metals. Three instruments utilizing the VDP method for measurement of heavily doped semiconductors, such as thermoelectrics, are discussed. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4770124]
C1 [Snyder, G. Jeffrey] CALTECH, Pasadena, CA 91125 USA.
   [Borup, Kasper A.; Iversen, Bo B.] Aarhus Univ, Ctr Mat Crystallog, Dept Chem, DK-8000 Aarhus, Denmark.
   [Borup, Kasper A.; Iversen, Bo B.] Aarhus Univ, iNANO, DK-8000 Aarhus, Denmark.
   [Toberer, Eric S.] Colorado Sch Mines, Dept Phys, Golden, CO 80401 USA.
   [Zoltan, Leslie D.; Nakatsukasa, George; Errico, Michael; Fleurial, Jean-Pierre] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
RP Snyder, GJ (reprint author), CALTECH, Pasadena, CA 91125 USA.
EM jsnyder@caltech.edu
RI Snyder, G. Jeffrey/E-4453-2011; Snyder, G/I-2263-2015
OI Snyder, G. Jeffrey/0000-0003-1414-8682; 
FU NASA-JPL thermoelectrics group; Danish National Research Foundation
   (Center for Materials Crystallography); Danish Strategic Research
   Council (Center for Energy Materials); U.S. National Science Foundation
   (NSF) MRSEC program-REMRSEC Center [DMR-0820518]
FX We gratefully acknowledge the assistance of the NASA-JPL thermoelectrics
   group for design, initial development, and testing, as well as funding
   for this project. The work was supported by the Danish National Research
   Foundation (Center for Materials Crystallography) and the Danish
   Strategic Research Council (Center for Energy Materials). E.S.T.
   acknowledges support from the U.S. National Science Foundation (NSF)
   MRSEC program-REMRSEC Center, Grant No. DMR-0820518. G.J.S acknowledges
   support of Fred Harris and others at BSST/Amerigon during the
   fabrication of the Caltech system.
NR 28
TC 73
Z9 73
U1 3
U2 100
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0034-6748
J9 REV SCI INSTRUM
JI Rev. Sci. Instrum.
PD DEC
PY 2012
VL 83
IS 12
AR 123902
DI 10.1063/1.4770124
PG 7
WC Instruments & Instrumentation; Physics, Applied
SC Instruments & Instrumentation; Physics
GA 061FS
UT WOS:000312834300036
PM 23278000
ER

PT J
AU Thomas, IR
   Greenhagen, BT
   Bowles, NE
   Hanna, KLD
   Temple, J
   Calcutt, SB
AF Thomas, I. R.
   Greenhagen, B. T.
   Bowles, N. E.
   Hanna, K. L. Donaldson
   Temple, J.
   Calcutt, S. B.
TI A new experimental setup for making thermal emission measurements in a
   simulated lunar environment
SO REVIEW OF SCIENTIFIC INSTRUMENTS
LA English
DT Article
ID LABORATORY MEASUREMENTS; PLANETARY SURFACES; SPECTRA; SPECTROSCOPY;
   RADIOMETER; GRADIENTS; FEATURES; MODEL; MOON
AB One of the key problems in determining lunar surface composition for thermal-infrared measurements is the lack of comparable laboratory-measured spectra. As the surface is typically composed of fine-grained particulates, the lunar environment induces a thermal gradient within the near subsurface, altering the emission spectra: this environment must therefore be simulated in the laboratory, considerably increasing the complexity of the measurement. Previous measurements have created this thermal gradient by either heating the cup in which the sample sits or by illuminating the sample using a solar-like source. This is the first setup able to measure in both configurations, allowing direct comparisons to be made between the two. Also, measurements across a wider spectral range and at a much higher spectral resolution can be acquired using this new setup. These are required to support new measurements made by the Diviner Lunar Radiometer, the first multi-spectral thermal-infrared instrument to orbit the Moon. Results from the two different heating methods are presented, with measurements of a fine-grained quartz sample compared to previous similar measurements, plus measurements of a common lunar highland material, anorthite. The results show that quartz gives the same results for both methods of heating, as predicted by previous studies, though the anorthite spectra are different. The new calibration pipeline required to convert the raw data into emissivity spectra is described also. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4769084]
C1 [Thomas, I. R.; Bowles, N. E.; Temple, J.; Calcutt, S. B.] Univ Oxford, Atmospher Ocean & Planetary Phys Dept, Oxford, England.
   [Greenhagen, B. T.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
   [Hanna, K. L. Donaldson] Brown Univ, Dept Geol Sci, Providence, RI 02912 USA.
RP Thomas, IR (reprint author), Univ Oxford, Atmospher Ocean & Planetary Phys Dept, Oxford, England.
EM thomas@atm.ox.ac.uk
RI Greenhagen, Benjamin/C-3760-2016; 
OI Calcutt, Simon/0000-0002-0102-3170
FU UK Science and Technology Facilities Council
FX B.T.G. would like to thank J. Hunt at JPL for conducting the Raman
   spectroscopy of the minerals. I.R.T. would like to thank members of the
   AOPP electronic and mechanical workshops for their invaluable help and
   expertise, and the UK Science and Technology Facilities Council for
   financial support.
NR 23
TC 4
Z9 4
U1 4
U2 13
PU AMER INST PHYSICS
PI MELVILLE
PA CIRCULATION & FULFILLMENT DIV, 2 HUNTINGTON QUADRANGLE, STE 1 N O 1,
   MELVILLE, NY 11747-4501 USA
SN 0034-6748
J9 REV SCI INSTRUM
JI Rev. Sci. Instrum.
PD DEC
PY 2012
VL 83
IS 12
AR 124502
DI 10.1063/1.4769084
PG 6
WC Instruments & Instrumentation; Physics, Applied
SC Instruments & Instrumentation; Physics
GA 061FS
UT WOS:000312834300043
PM 23278007
ER

PT J
AU Chang, CW
   Okojie, RS
AF Chang, C. W.
   Okojie, R. S.
TI Ni-based microvalves for flow modulation: Toward active combustion
   control
SO SENSORS AND ACTUATORS A-PHYSICAL
LA English
DT Article; Proceedings Paper
CT 16th International Conference On Solid-State Sensors, Actuators and
   Microsystems
CY JUN 05-09, 2011
CL Beijing, PEOPLES R CHINA
DE Microvalve; Diaphragm; Combustion control; Microactuator; Finite element
   analysis; Computational fluid dynamics
ID FABRICATION; DIAPHRAGM; DESIGN
AB We report on the development of nickel-based micro diaphragms for fuel flow modulation during jet engine combustion. The micro diaphragms were fabricated and assembled, after which they were tested in a prototype mesoscale fuel injector. A combination of deep reactive etching, silicon loss molding, electroplating, and conventional machining techniques were utilized to implement the mesoscale fuel injector and the nickel diaphragms. Modulation of fluid flow through the fuel injector was demonstrated with the nickel diaphragm functioning as a valve. The diaphragms were characterized and the measured results were compared with results from finite element analysis. The fuel injector was characterized for flow rate versus applied fluid pressure and these results were compared with computational fluid dynamics results. The primary goal of this work is to demonstrate the concept of flow modulation using a nickel-based diaphragm, with future generations planned to be implemented in silicon carbide. Future application of this technology will be in active combustion control to mitigate combustion instabilities in jet engines when they occur. (C) 2012 Elsevier B.V. All rights reserved.
C1 [Chang, C. W.] ASRC Aerosp Corp, Cleveland, OH 44135 USA.
   [Okojie, R. S.] NASA Glenn Res Ctr, Cleveland, OH USA.
RP Chang, CW (reprint author), ASRC Aerosp Corp, 21000 Brookpk Rd,MS 77-1, Cleveland, OH 44135 USA.
EM carl.w.chang@nasa.gov
NR 18
TC 0
Z9 0
U1 0
U2 9
PU ELSEVIER SCIENCE SA
PI LAUSANNE
PA PO BOX 564, 1001 LAUSANNE, SWITZERLAND
SN 0924-4247
J9 SENSOR ACTUAT A-PHYS
JI Sens. Actuator A-Phys.
PD DEC
PY 2012
VL 188
SI SI
BP 396
EP 400
DI 10.1016/j.sna.2012.02.009
PG 5
WC Engineering, Electrical & Electronic; Instruments & Instrumentation
SC Engineering; Instruments & Instrumentation
GA 059GN
UT WOS:000312692500053
ER

PT J
AU Statham, SM
   Hanagud, SV
   Glass, BJ
AF Statham, Shannon M.
   Hanagud, Sathya V.
   Glass, Brian J.
TI Automated, Real-Time Health Monitoring of Structures for Interplanetary
   Exploration Systems
SO AIAA JOURNAL
LA English
DT Article
ID DAMAGE IDENTIFICATION; NEURAL-NETWORKS; VIBRATION; DRILL; VIBROMETRY;
   FREQUENCY; INTEGRITY; PLANETARY
AB Space exploration missions, specifically to Mars, involve complex operations as the search for water and other signs of extant or past life continues. Such missions require advanced robotic systems that are susceptible to structural and mechanical failures and operational faults, which motivates a need for structural health monitoring techniques relevant to interplanetary exploration systems. This paper presents an automated dynamics-based structural health monitoring system using laser Doppler velocimeter sensors, signal filters, and trained neural networks that is formulated for a subsurface interplanetary exploration drill prototype. The developed system presents advanced research accomplishments in the area of real-time structural health monitoring that include rapid-response capabilities of predicting drilling faults and failures before they occur and field demonstrations on an operating drill system.
C1 [Statham, Shannon M.] Georgia Inst Technol, Sch Aerosp Engn, Atlanta, GA 30332 USA.
   [Glass, Brian J.] NASA, Ames Res Ctr, Explorat Syst Div, Moffett Field, CA 94035 USA.
RP Statham, SM (reprint author), Georgia Inst Technol, Sch Aerosp Engn, 270 Ferst Dr NW, Atlanta, GA 30332 USA.
NR 49
TC 3
Z9 3
U1 0
U2 9
PU AMER INST AERONAUT ASTRONAUT
PI RESTON
PA 1801 ALEXANDER BELL DRIVE, STE 500, RESTON, VA 22091-4344 USA
SN 0001-1452
J9 AIAA J
JI AIAA J.
PD DEC
PY 2012
VL 50
IS 12
BP 2670
EP 2681
DI 10.2514/1.J051173
PG 12
WC Engineering, Aerospace
SC Engineering
GA 055QK
UT WOS:000312431300004
ER

PT J
AU Montague, M
   McArthur, GH
   Cockell, CS
   Held, J
   Marshall, W
   Sherman, LA
   Wang, N
   Nicholson, WL
   Tarjan, DR
   Cumbers, J
AF Montague, Michael
   McArthur, George H.
   Cockell, Charles S.
   Held, Jason
   Marshall, William
   Sherman, Louis A.
   Wang, Norman
   Nicholson, Wayne L.
   Tarjan, Daniel R.
   Cumbers, John
TI The Role of Synthetic Biology for In Situ Resource Utilization (ISRU)
SO ASTROBIOLOGY
LA English
DT Review
ID EXTRATERRESTRIAL MATERIALS; IRON-METEORITES; CARBON SOURCE;
   LIFE-SUPPORT; WATER-ICE; SPACE; GROWTH; PHOTOSYNTHESIS; EFFICIENCY;
   NUTRIENTS
AB A persistent presence in space can either be supported from Earth or generate the required resources for human survival from material already present in space, so called "in situ material.'' Likely, many of these resources such as water or oxygen can best be liberated from in situ material by conventional physical and chemical processes. However, there is one critical resource required for human life that can only be produced in quantity by biological processes: high-protein food. Here, recent data concerning the materials available on the Moon and common asteroid types is reviewed with regard to the necessary materials to support the production of food from material in situ to those environments. These materials and their suitability as feedstock for the biological production of food are reviewed in a broad and general way such that terminology that is often a barrier to understanding such material by interdisciplinary readers is avoided. The waste products available as in situ materials for feasibility studies on the International Space Station are also briefly discussed. The conclusion is that food production in space environments from in situ material proven to exist there is quite feasible. Key Words: Astrobiology-Asteroid-Biomineralogy-Cyanobacteria. Astrobiology 12, 1135-1142.
C1 [Montague, Michael] J Craig Venter Inst, Dept Synthet Biol, Rockville, MD 20850 USA.
   [McArthur, George H.] Virginia Commonwealth Univ, Dept Chem & Life Sci Engn, Richmond, VA USA.
   [Cockell, Charles S.] Open Univ, Geomicrobiol Res Grp, PSSRI, Milton Keynes MK7 6AA, Bucks, England.
   [Held, Jason] Saber Astronaut, Manly, NSW, Australia.
   [Marshall, William] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
   [Sherman, Louis A.] Purdue Univ, Dept Biol Sci, W Lafayette, IN 47907 USA.
   [Wang, Norman] Univ Hawaii Manoa, Dept Mol Biosci & Bioengn, Honolulu, HI 96822 USA.
   [Nicholson, Wayne L.] Univ Florida, Dept Microbiol & Cell Sci, Space Life Sci Lab, Kennedy Space Ctr, FL USA.
   [Tarjan, Daniel R.] EO Lawrence Berkeley Natl Lab, Berkeley, CA USA.
   [Cumbers, John] Brown Univ, Dept Mol Biol Cell Biol & Biochem, Providence, RI 02912 USA.
   [Cumbers, John] Univ Calif Santa Cruz, Univ Affiliated Res Ctr, Synthet Biol Program, NASA Ames Res Ctr, Moffett Field, CA USA.
RP Montague, M (reprint author), J Craig Venter Inst, Dept Synthet Biol, Bldg1 345E,9704 Med Ctr Dr, Rockville, MD 20850 USA.
EM mmontagu@jcvi.org
OI , /0000-0003-0495-3274
NR 47
TC 9
Z9 9
U1 2
U2 27
PU MARY ANN LIEBERT INC
PI NEW ROCHELLE
PA 140 HUGUENOT STREET, 3RD FL, NEW ROCHELLE, NY 10801 USA
SN 1531-1074
J9 ASTROBIOLOGY
JI Astrobiology
PD DEC
PY 2012
VL 12
IS 12
BP 1135
EP 1142
DI 10.1089/ast.2012.0829
PG 8
WC Astronomy & Astrophysics; Biology; Geosciences, Multidisciplinary
SC Astronomy & Astrophysics; Life Sciences & Biomedicine - Other Topics;
   Geology
GA 057KH
UT WOS:000312561600005
PM 23140229
ER

PT J
AU Bjorkstedt, EP
   Goericke, R
   McClatchie, S
   Weber, E
   Watson, W
   Lo, N
   Peterson, WT
   Brodeur, RD
   Auth, T
   Fisher, J
   Morgan, C
   Peterson, J
   Largier, J
   Bograd, SJ
   Durazo, R
   Gaxiola-Castro, G
   Lavaniegos, B
   Chavez, FP
   Collins, CA
   Hannah, B
   Field, J
   Sakuma, K
   Satterthwaite, W
   O'Farrell, M
   Hayes, S
   Harding, J
   Sydeman, WJ
   Thompson, SA
   Warzybok, P
   Bradley, R
   Jahncke, J
   Golightly, RT
   Schneider, SR
   Suryan, RM
   Gladics, AJ
   Horton, CA
   Kim, SY
   Melin, SR
   DeLong, RL
   Abell, J
AF Bjorkstedt, Eric P.
   Goericke, Ralf
   McClatchie, Sam
   Weber, Ed
   Watson, William
   Lo, Nancy
   Peterson, William T.
   Brodeur, Richard D.
   Auth, Toby
   Fisher, Jennifer
   Morgan, Cheryl
   Peterson, Jay
   Largier, John
   Bograd, Steven J.
   Durazo, Reginaldo
   Gaxiola-Castro, Gilberto
   Lavaniegos, Bertha
   Chavez, Francisco P.
   Collins, Curtis A.
   Hannah, Bob
   Field, John
   Sakuma, Keith
   Satterthwaite, Will
   O'Farrell, Michael
   Hayes, Sean
   Harding, Jeff
   Sydeman, William J.
   Thompson, Sarah Ann
   Warzybok, Pete
   Bradley, Russell
   Jahncke, Jaime
   Golightly, Richard T.
   Schneider, Stephanie R.
   Suryan, Robert M.
   Gladics, Amanda J.
   Horton, Cheryl A.
   Kim, Sung Yong
   Melin, Sharon R.
   DeLong, Robert L.
   Abell, Jeffrey
TI STATE OF THE CALIFORNIA CURRENT 2011-2012: ECOSYSTEMS RESPOND TO LOCAL
   FORCING AS LA NINA WAVERS AND WANES
SO CALIFORNIA COOPERATIVE OCEANIC FISHERIES INVESTIGATIONS REPORTS
LA English
DT Article
ID SARDINE SARDINOPS-SAGAX; CLIMATE-CHANGE; CURRENT SYSTEM; PACIFIC-OCEAN;
   FISH LARVAE; OREGON; VARIABILITY; ZONE; OSCILLATION; COMMUNITY
AB The state of the California Current System (CCS) since spring 2011 has evolved in response to dissipation of La Nina through spring and summer, resurgence of cooler La Nina conditions in fall and winter, and finally a transition towards ENSO-neutral conditions in spring 2012. The resurgence of La Nina was uneven, however, as indicated by variable responses in broad climate indices such as the Pacific Decadal Oscillation and the multi-variate ENSO index, and by latitudinal variability in the timing, strength, and duration of upwelling relative to climatological means. Across the CCS, various measures of ecosystem productivity exhibited a general decline in 2011 relative to 2010, but the magnitude of these declines varied substantially among taxa. Available observations indicate regional variability in climate forcing and ecosystem responses throughout the CCS, continuing a pattern that has emerged with increasing clarity over the past several years. In 2011-12, regional variability was again a consequence of southern regions exhibiting a relatively mild response to climate forcing, in this case tending towards climatological means, while northern regions showed somewhat greater effects of delayed or weaker-than-normal upwelling. In addition to the effects of local and basin-scale forcing, long-term observations off southern California show declines in dissolved oxygen and increases in nutrient concentrations in waters below the mixed layer, trends that are consistent with recent predictions of how global warming will affect the characteristics of upwelling source waters in the CCS. Such trends must be accounted for more comprehensively in ongoing assessment of the state of the California Current and its responses to environmental forcing. At the time of writing, tropical conditions are ENSO neutral and forecast to transition into El Nino in late 2012. This, combined with unusually high abundances of diverse gelatinous taxa throughout much of the CCS during spring 2012, suggests that the ongoing evolution of the state of the California Current might take a particularly unusual path in the coming year.
C1 [Bjorkstedt, Eric P.] Humboldt State Univ, Natl Marine Fisheries Serv, SW Fisheries Sci Ctr, Fisheries Ecol Div, Trinidad, CA 95570 USA.
   [Bjorkstedt, Eric P.] Humboldt State Univ, Dept Fisheries Biol, Trinidad, CA 95570 USA.
   [Goericke, Ralf; Kim, Sung Yong] Univ Calif San Diego, Scripps Inst Oceanog, La Jolla, CA 92093 USA.
   [McClatchie, Sam; Weber, Ed; Watson, William; Lo, Nancy] Natl Marine Fisheries Serv, SW Fisheries Sci Ctr, Fisheries Resources Div, La Jolla, CA 92037 USA.
   [Lo, Nancy] Ocean Associates Inc, La Jolla, CA 92037 USA.
   [Peterson, William T.; Brodeur, Richard D.] Oregon State Univ, Hatfield Marine Sci Ctr, Natl Marine Fisheries Serv, NW Fisheries Sci Ctr, Newport, OR 97365 USA.
   [Auth, Toby; Fisher, Jennifer; Morgan, Cheryl; Peterson, Jay] Oregon State Univ, Hatfield Marine Sci Ctr, Cooperat Inst Marine Resources Studies, Newport, OR 97365 USA.
   [Largier, John] Bodega Bay Marine Lab, Bodega Bay, CA 94923 USA.
   [Bograd, Steven J.] Natl Marine Fisheries Serv, SW Fisheries Sci Ctr, Div Environm Res, Pacific Grove, CA 93950 USA.
   [Durazo, Reginaldo] UABC Fac Ciencias Marinas, Ensenada, Baja California, Mexico.
   [Gaxiola-Castro, Gilberto; Lavaniegos, Bertha] CICESE, Div Oceanol, Ensenada, Baja California, Mexico.
   [Chavez, Francisco P.] Monterey Bay Aquarium Res Inst, Moss Landing, CA 95039 USA.
   [Collins, Curtis A.] USN, Postgrad Sch, Monterey, CA 93943 USA.
   [Hannah, Bob] Oregon Dept Fish & Wildlife, Marine Resources Program, Newport, OR 97365 USA.
   [Field, John; Sakuma, Keith; Satterthwaite, Will; O'Farrell, Michael; Hayes, Sean; Harding, Jeff] Natl Marine Fisheries Serv, SW Fisheries Sci Ctr, Fisheries Ecol Div, Santa Cruz, CA 95060 USA.
   [Sydeman, William J.; Thompson, Sarah Ann] Farallon Inst Adv Ecosyst Res, Petaluma, CA 94952 USA.
   [Warzybok, Pete; Bradley, Russell; Jahncke, Jaime] PRBO Conservat Sci, Petaluma, CA 94954 USA.
   [Golightly, Richard T.; Schneider, Stephanie R.] Humboldt State Univ, Dept Wildlife, Arcata, CA 95521 USA.
   [Melin, Sharon R.; DeLong, Robert L.] NOAA, Natl Marine Fisheries Serv, Alaska Fisheries Sci Ctr, Natl Marine Mammal Lab, Seattle, WA 98115 USA.
   [Abell, Jeffrey] Humboldt State Univ, Dept Oceanog, Arcata, CA 95521 USA.
RP Bjorkstedt, EP (reprint author), Humboldt State Univ, Natl Marine Fisheries Serv, SW Fisheries Sci Ctr, Fisheries Ecol Div, POB 690, Trinidad, CA 95570 USA.
RI Weber, Edward/A-6986-2009; Kim, Sung Yong/B-9852-2009
OI Weber, Edward/0000-0002-0942-434X; Kim, Sung Yong/0000-0003-1962-8992
FU NOAA's National Marine Fisheries Service (NMFS); Fisheries and the
   Environment (FATE) programs; Mexico's Consejo Nacional de Ciencia y
   Tecnologia (CONACyT); U.S. National Science Foundation (NSF); Bonneville
   Power Administration (BPA); United States Fish and Wildlife Service
   (USFWS); NOAA's Integrated Ocean Observing Systems (IOOS) program;
   Coastal Observing Research and Development Center; California's Ocean
   Protection Council; Redwood National and State Parks; Baker Trust;
   Marisla Foundation; Campini Foundation; Kimball Foundation; Mead
   Foundation; R/V Coral Sea; R/V Francisco de Ulloa; Elahka; FS/V Ocean
   Starr; R/V New Horizon; FS/V Bell M. Shimada; F/V Frosti
FX We thank three anonymous reviewers for their comments that improved this
   manuscript and provide guidance for continued development of reports in
   this series. Xuemei Qiu and Reiko Michisaki assisted with several of the
   plots included in this paper. Financial and collaborative support for
   the science reported here comes from diverse agencies and government
   entities, including NOAA's National Marine Fisheries Service (NMFS) and
   its Stock Assessment Improvement Plan (SAIP) and Fisheries and the
   Environment (FATE) programs, Mexico's Consejo Nacional de Ciencia y
   Tecnologia (CONACyT), the U.S. National Science Foundation (NSF),
   Bonneville Power Administration (BPA), the United States Fish and
   Wildlife Service (USFWS), NOAA's Integrated Ocean Observing Systems
   (IOOS) program and university partners through the Coastal Observing
   Research and Development Center, California's Ocean Protection Council,
   and Redwood National and State Parks. The David and Lucile Packard
   Foundation supported central California mooring observations. The Baker
   Trust, the Marisla Foundation, the Campini Foundation, the Kimball
   Foundation, and the Mead Foundation supported seabird work on Southeast
   Farallon Island. We also thank the captains and crew of the vessels that
   supported this work, including R/V Coral Sea, R/V Francisco de Ulloa,
   Elahka, FS/V Ocean Starr, R/V New Horizon, FS/V Bell M. Shimada, F/V
   Frosti, F/V Miss Sue, F/V Piky, and F/V Excalibur. We also sincerely
   thank the many dedicated individuals who have participated in, advised,
   collaborated in, or otherwise contributed to the collection, management,
   and analysis of these data both in recent years and in the past.
NR 73
TC 21
Z9 21
U1 1
U2 36
PU SCRIPPS INST OCEANOGRAPHY
PI LA JOLLA
PA A-003, LA JOLLA, CA 92093 USA
SN 0575-3317
J9 CAL COOP OCEAN FISH
JI Calif. Coop. Ocean. Fish. Invest. Rep.
PD DEC
PY 2012
VL 53
BP 41
EP 76
PG 36
WC Fisheries
SC Fisheries
GA 050FY
UT WOS:000312039800004
ER

PT J
AU Ma, PL
   Zhang, K
   Shi, JJ
   Matsui, T
   Arking, A
AF Ma, Po-Lun
   Zhang, Kai
   Shi, Jainn Jong
   Matsui, Toshihisa
   Arking, Albert
TI Direct Radiative Effect of Mineral Dust on the Development of African
   Easterly Waves in Late Summer, 2003-07
SO JOURNAL OF APPLIED METEOROLOGY AND CLIMATOLOGY
LA English
DT Article
ID SAHARAN AIR LAYER; TROPICAL CYCLONE ACTIVITY; WEST-AFRICA; NUMERICAL
   SIMULATIONS; LOWER TROPOSPHERE; EXPERIMENT SHADE; FORECAST SYSTEM; OCEAN
   RESPONSE; C-130 AIRCRAFT; HEATING RATES
AB Episodic events of both Saharan dust outbreaks and African easterly waves (AEWs) are observed to move westward over the eastern tropical Atlantic Ocean. The relationship between the warm, dry, and dusty Saharan air layer on the nearby storms has been the subject of considerable debate. In this study, the Weather Research and Forecasting model is used to investigate the radiative effect of dust on the development of AEWs during August and September, the months of maximum tropical cyclone activity, in years 2003-07. The simulations show that dust radiative forcing enhances the convective instability of the environment. As a result, most AEWs intensify in the presence of a dust layer. The Lorenz energy cycle analysis reveals that the dust radiative forcing enhances the condensational heating, which elevates the zonal and eddy available potential energy. In turn, available potential energy is effectively converted to eddy kinetic energy, in which local convective overturning plays the primary role. The magnitude of the intensification effect depends on the initial environmental conditions, including moisture, baroclinity, and the depth of the boundary layer. The authors conclude that dust radiative forcing, albeit small, serves as a catalyst to promote local convection that facilitates AEW development.
C1 [Ma, Po-Lun; Zhang, Kai] Pacific NW Natl Lab, Atmospher Sci & Global Change Div, Richland, WA 99352 USA.
   [Ma, Po-Lun; Arking, Albert] Johns Hopkins Univ, Dept Earth & Planetary Sci, Baltimore, MD 21218 USA.
   [Shi, Jainn Jong] Univ Maryland Baltimore Cty, Goddard Earth Sci & Technol Ctr, Baltimore, MD 21228 USA.
   [Shi, Jainn Jong; Matsui, Toshihisa] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
   [Matsui, Toshihisa] Univ Maryland, Earth Syst Sci Interdisciplinary Ctr, College Pk, MD 20742 USA.
RP Ma, PL (reprint author), Pacific NW Natl Lab, Atmospher Sci & Global Change Div, POB 999,MSIN K9-24, Richland, WA 99352 USA.
EM po-lun.ma@pnnl.gov
RI Ma, Po-Lun/G-7129-2015; Zhang, Kai/F-8415-2010
OI Ma, Po-Lun/0000-0003-3109-5316; Zhang, Kai/0000-0003-0457-6368
FU Department of Earth and Planetary Sciences, The Johns Hopkins
   University; Multicore Computational Center at University of Maryland,
   Baltimore County; Office of Science (BER), U.S. Department of Energy;
   Battelle Memorial Institute [DE-AC06-76RLO 1830]
FX We thank the three anonymous reviewers for their insightful comments. We
   thank William K.-M. Lau, Darryn Waugh, Ming-Dah Chou, Wei-Kuo Tao,
   Milton Halem, Lorrain Remer, and Yoram Kaufman for helpful discussions.
   We thank Dave Strenski, Norman Barnhart, and Peter Johnsen at Cray,
   Inc., for providing access to and help with the Cray XT5 supercomputer.
   We thank De-Iou Tsai for his help with scripts for running the model and
   Chun-Chi Lien for her help obtaining the ECMWF data. This study is
   supported by Department of Earth and Planetary Sciences, The Johns
   Hopkins University, and is supported by Multicore Computational Center
   at University of Maryland, Baltimore County. This study is supported by
   the Office of Science (BER), U.S. Department of Energy. The Pacific
   Northwest National Laboratory is operated for DOE by Battelle Memorial
   Institute under Contract DE-AC06-76RLO 1830.
NR 67
TC 7
Z9 7
U1 1
U2 10
PU AMER METEOROLOGICAL SOC
PI BOSTON
PA 45 BEACON ST, BOSTON, MA 02108-3693 USA
SN 1558-8424
J9 J APPL METEOROL CLIM
JI J. Appl. Meteorol. Climatol.
PD DEC
PY 2012
VL 51
IS 12
BP 2090
EP 2104
DI 10.1175/JAMC-D-11-0215.1
PG 15
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 056HE
UT WOS:000312478200002
ER

PT J
AU Johnson, BT
   Petty, GW
   Skofronick-Jackson, G
AF Johnson, Benjamin T.
   Petty, Grant W.
   Skofronick-Jackson, Gail
TI Microwave Properties of Ice-Phase Hydrometeors for Radar and
   Radiometers: Sensitivity to Model Assumptions
SO JOURNAL OF APPLIED METEOROLOGY AND CLIMATOLOGY
LA English
DT Article
ID SIZE DISTRIBUTION; PRECIPITATION RETRIEVAL; RADIATIVE PROPERTIES;
   MELTING LAYER; PART II; SCATTERING; PARTICLES; MICROPHYSICS; CONSTANTS;
   SNOWFALL
AB A simplified framework is presented for assessing the qualitative sensitivities of computed microwave properties, satellite brightness temperatures, and radar reflectivities to assumptions concerning the physical properties of ice-phase hydrometeors. Properties considered included the shape parameter mu of a gamma size distribution and the melted-equivalent mass median diameter D-0, the particle density, the dielectric mixing formula, and the choice of complex index of refraction for ice. These properties are examined for selected radiometer frequencies of 18.7, 36.5, 89.0, and 150.0 GHz and radar frequencies at 2.8, 13.4, 35.6, and 94.0 GHz-consistent with existing and planned remote sensing instruments. Passive and active microwave observables of ice particles are found to be extremely sensitive to the D-0 of the size distribution. Similar large sensitivities are found for variations in the ice volume fraction whenever the geometric mass median diameter exceeds approximately 1/8th of the wavelength. At 94 GHz the two-way path-integrated attenuation is potentially large for dense/compact particles. The distribution parameter mu has a comparatively weak effect on any observable: less than 1-2 K in brightness temperature and a maximum of 2.7 dB (S band only) in the effective radar reflectivity. Reversal of the roles of ice and air in the Maxwell Garnett dielectric mixing formula leads to a substantial change in both microwave brightness temperature (similar to 10 K) and radar reflectivity (approximately 2 dB across all frequencies). The choice of the complex index of refraction of ice can produce a 3%-4% change in the brightness temperature depression.
C1 [Johnson, Benjamin T.; Skofronick-Jackson, Gail] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
   [Johnson, Benjamin T.; Petty, Grant W.] Univ Wisconsin, Madison, WI USA.
RP Johnson, BT (reprint author), NASA, Goddard Space Flight Ctr, Code 613-1,8800 Greenbelt Rd, Greenbelt, MD 20771 USA.
EM benjamin.t.johnson@nasa.gov
RI Skofronick-Jackson, Gail/D-5354-2012; Petty, Grant/E-3118-2012; Johnson,
   Benjamin/E-8557-2015
OI Johnson, Benjamin/0000-0003-3444-9669
FU NASA [NAG7-7741, NAG5-9894]
FX We thank Dr. Robert Meneghini for his constructive comments on
   multiple-component dielectric mixing. We also thank an anonymous
   reviewer for useful recommendations. This project was funded through
   NASA Grants NAG7-7741 and NAG5-9894.
NR 57
TC 19
Z9 19
U1 0
U2 18
PU AMER METEOROLOGICAL SOC
PI BOSTON
PA 45 BEACON ST, BOSTON, MA 02108-3693 USA
SN 1558-8424
J9 J APPL METEOROL CLIM
JI J. Appl. Meteorol. Climatol.
PD DEC
PY 2012
VL 51
IS 12
BP 2152
EP 2171
DI 10.1175/JAMC-D-11-0138.1
PG 20
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 056HE
UT WOS:000312478200006
ER

PT J
AU Taylor, PC
AF Taylor, Patrick C.
TI Tropical Outgoing Longwave Radiation and Longwave Cloud Forcing Diurnal
   Cycles from CERES
SO JOURNAL OF THE ATMOSPHERIC SCIENCES
LA English
DT Article
ID REGIONAL CLOUD; CUMULUS CONVECTION; HYDROLOGIC-CYCLE; SATELLITE DATA;
   VARIABILITY; BUDGET; MODEL; PARAMETERS; STRATOCUMULUS; CIRCULATION
AB The diurnal cycle is a fundamental earth system variability driven by daily variations in solar insolation. Understanding diurnal variability is important for characterizing top-of-atmosphere and surface energy budgets. Climatological and seasonal first diurnal cycle harmonics of outgoing longwave radiation (OLR) and longwave cloud forcing (LWCF) are investigated using the Clouds and the Earth's Radiant Energy System (CERES) synoptic 3-hourly data. A comparison with previous studies indicates generally similar results. However, the results indicate that the CERES OLR diurnal cycle amplitudes are 10%-20% larger in desert regions than previous analyses. This difference results from the temporal interpolation technique over-estimating the daily maximum OLR. OLR diurnal cycle amplitudes in other tropical regions agree with previous work. Results show that the diurnal maximum and minimum OLR variability contributes equally to the total OLR variance over ocean; however, over land the diurnal maximum OLR variance contributes at least 50% more to the total OLR variability than the minimum OLR. The differences in maximum and minimum daily OLR variability are largely due to differences in surface temperature standard deviations at these times, about 5-6 and 3-4 K, respectively. The OLR variance at diurnal maximum and minimum is also influenced by negative and positive correlations, respectively, between LWCF and clear-sky OLR. The anticorrelation between LWCF and clear-sky OLR at diurnal OLR maximum indicates smaller cloud fractions at warmer surface temperatures. The relationship between LWCF and clear-sky OLR at diurnal minimum OLR appears to result from a preference for deep convection, more high clouds, and larger LWCF values to occur with warmer surface temperatures driving a narrower diurnal minimum OLR distribution.
C1 NASA, Climate Sci Branch, Langley Res Ctr, Hampton, VA 23681 USA.
RP Taylor, PC (reprint author), NASA, Climate Sci Branch, Langley Res Ctr, 21 Langley Blvd,Mail Stop 420, Hampton, VA 23681 USA.
EM patrick.c.taylor@nasa.gov
RI Taylor, Patrick/D-8696-2015
OI Taylor, Patrick/0000-0002-8098-8447
NR 44
TC 24
Z9 24
U1 0
U2 13
PU AMER METEOROLOGICAL SOC
PI BOSTON
PA 45 BEACON ST, BOSTON, MA 02108-3693 USA
SN 0022-4928
J9 J ATMOS SCI
JI J. Atmos. Sci.
PD DEC
PY 2012
VL 69
IS 12
BP 3652
EP 3669
DI 10.1175/JAS-D-12-088.1
PG 18
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 055PZ
UT WOS:000312430200013
ER

PT J
AU Saatchi, S
   Ulander, L
   Williams, M
   Quegan, S
   LeToan, T
   Shugart, H
   Chave, J
AF Saatchi, Sassan
   Ulander, Lars
   Williams, Mathew
   Quegan, Shaun
   Thuy LeToan
   Shugart, Herman
   Chave, Jerome
TI CORRESPONDENCE: Forest biomass and the science of inventory from space
SO NATURE CLIMATE CHANGE
LA English
DT Letter
ID BACKSCATTER
C1 [Saatchi, Sassan] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
   [Ulander, Lars] Chalmers, Dept Earth & Space Sci, S-41296 Gothenburg, Sweden.
   [Williams, Mathew] Univ Edinburgh, Edinburgh EH8 9XP, Midlothian, Scotland.
   [Quegan, Shaun] Univ Sheffield, Ctr Terr Carbon Dynam, Sheffield S3 7RH, S Yorkshire, England.
   [Thuy LeToan] Ctr Etud Spatiales Biosphere, F-31401 Toulouse, France.
   [Shugart, Herman] Univ Virginia, Charlottesville, VA 22904 USA.
   [Chave, Jerome] Univ Toulouse 3, CNRS, UMR 5174, F-31062 Toulouse, France.
RP Saatchi, S (reprint author), CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA.
EM Saatchi@jpl.nasa.gov
NR 7
TC 6
Z9 6
U1 1
U2 32
PU NATURE PUBLISHING GROUP
PI LONDON
PA MACMILLAN BUILDING, 4 CRINAN ST, LONDON N1 9XW, ENGLAND
SN 1758-678X
J9 NAT CLIM CHANGE
JI Nat. Clim. Chang.
PD DEC
PY 2012
VL 2
IS 12
BP 826
EP 827
PG 2
WC Environmental Sciences; Environmental Studies; Meteorology & Atmospheric
   Sciences
SC Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences
GA 055RF
UT WOS:000312433700004
ER

PT J
AU Watts, JD
   Kimball, JS
   Jones, LA
   Schroeder, R
   McDonald, KC
AF Watts, Jennifer D.
   Kimball, John S.
   Jones, Lucas A.
   Schroeder, Ronny
   McDonald, Kyle C.
TI Satellite Microwave remote sensing of contrasting surface water
   inundation changes within the Arctic-Boreal Region
SO REMOTE SENSING OF ENVIRONMENT
LA English
DT Article
DE Arctic; Inundation; Permafrost; AMSR; MODIS; Landsat; Climate change
ID HIGH-LATITUDE WETLANDS; LAND-COVER DATABASE; NORTHERN-HEMISPHERE;
   PERMAFROST THAW; CLIMATE-CHANGE; LAKES; PEATLANDS; METHANE;
   PRECIPITATION; TEMPERATURE
AB Surface water inundation in the Arctic-Boreal region is dynamic and strongly influences land-atmosphere water, energy and carbon (CO2, CH4) fluxes, and potential feedbacks to climate change. Here we report on recent (2003-2010) surface inundation patterns across the Arctic-Boreal region (>= 50 degrees N) and within major permafrost (PF) zones detected using satellite passive microwave remote sensing retrievals of daily fractional open water (Fw) cover from the Advanced Microwave Scanning Radiometer for EOS (AMSR-E). The AMSR-E Fw (25-km resolution) maps reflect strong microwave sensitivity to sub-grid scale open water variability and compare favorably (0.71 <= R-2 <= 0.84) with alternative, static Fw maps derived from finer scale (30-m to 250-m resolution) Landsat, MODIS and SRTM radar (MOD44W) data. The AMSR-E retrievals show dynamic seasonal and annual variability in surface inundation that is unresolved in the static Fw maps. The AMSR-E Fw record also corresponds strongly (0.71 <= R <= 0.87) with regional wet/dry cycles inferred from basin discharge records. An AMSR-E algorithm sensitivity analysis shows a conservative estimate of Fw retrieval uncertainty (RMSE) within +/- 4.1% for effective resolution of regional inundation patterns and seasonal to annual variability. A regional trend analysis of the 8-year AMSR-E record shows no significant Arctic-Boreal region wide Fw trend for the period, and instead reveals contrasting inundation changes within different PF zones. Widespread Fw wetting is detected within continuous (92% of grid cells with significant trend; p<0.1) and discontinuous (82%) PF zones, while sporadic/isolated PF areas show widespread (71%) Fw drying trends. These results are consistent with previous studies showing evidence of contrasting regional inundation patterns linked to PF degradation and associated changes to surface hydrology under recent climate warming. (c) 2012 Elsevier Inc. All rights reserved.
C1 [Watts, Jennifer D.; Kimball, John S.; Jones, Lucas A.] Univ Montana, Flathead Lake Biol Stn, Polson, MT 59860 USA.
   [Schroeder, Ronny; McDonald, Kyle C.] CUNY City Coll, Dept Earth & Atmospher Sci, New York, NY 10031 USA.
   [Schroeder, Ronny; McDonald, Kyle C.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
RP Watts, JD (reprint author), Univ Montana, Numer Terradynam Simulat Group, CHCB 428,32 Campus Dr, Missoula, MT 59812 USA.
EM jennifer.watts@ntsg.umt.edu
FU National Aeronautics and Space Administration; NASA Terrestrial Ecology
   and Making Earth System Data Records for Use in Research Environments
   (MEaSUREs) programs
FX This work was conducted at the University of Montana, at The City
   College of New York, and Jet Propulsion Laboratory, California Institute
   of Technology under contract to the National Aeronautics and Space
   Administration. This work was supported under the NASA Terrestrial
   Ecology and Making Earth System Data Records for Use in Research
   Environments (MEaSUREs) programs; the AMSR-E data were provided by the
   NASA data archive (DAAC) facility at the National Snow and Ice Data
   Center (NSIDC) using algorithms developed at the University of Montana.
   We also thank Dr. Peter Potapov at South Dakota State University for
   allowing us to use his land cover dataset.
NR 96
TC 19
Z9 19
U1 9
U2 102
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0034-4257
EI 1879-0704
J9 REMOTE SENS ENVIRON
JI Remote Sens. Environ.
PD DEC
PY 2012
VL 127
BP 223
EP 236
DI 10.1016/j.rse.2012.09.003
PG 14
WC Environmental Sciences; Remote Sensing; Imaging Science & Photographic
   Technology
SC Environmental Sciences & Ecology; Remote Sensing; Imaging Science &
   Photographic Technology
GA 047TY
UT WOS:000311865600018
ER

PT J
AU Hilker, T
   Lyapustin, AI
   Tucker, CJ
   Sellers, PJ
   Hall, FG
   Wang, YJ
AF Hilker, Thomas
   Lyapustin, Alexei I.
   Tucker, Compton J.
   Sellers, Piers J.
   Hall, Forrest G.
   Wang, Yujie
TI Remote sensing of tropical ecosystems: Atmospheric correction and cloud
   masking matter
SO REMOTE SENSING OF ENVIRONMENT
LA English
DT Article
DE Amazon; Atmospheric correction; Cloud screening; NDVI; Time series; Land
   surface product validation; MODIS
ID VEGETATION INDEXES; MODIS; AMAZON; DEFORESTATION; REFLECTANCE; DROUGHT;
   SURFACE; AEROSOL; CLIMATE
AB Tropical rainforests are significant contributors to the global cycles of energy, water and carbon. As a result, monitoring of the vegetation status over regions such as Amazonia has been a long standing interest of Earth scientists trying to determine the effect of climate change and anthropogenic disturbance on the tropical ecosystems and its feedback on the Earth's climate. Satellite-based remote sensing is the only practical approach for observing the vegetation dynamics of regions like the Amazon over useful spatial and temporal scales, but recent years have seen much controversy over satellite-derived vegetation states in Amazonia, with studies predicting opposite feedbacks depending on data processing technique and interpretation. Recent results suggest that some of this uncertainty could stem from a lack of quality in atmospheric correction and cloud screening. In this paper, we assess these uncertainties by comparing the current standard surface reflectance products (MYD09, MYD09GA) and derived composites (MYD09A1, MCD43A4 and MYD13A2 - Vegetation Index) from the Moderate Resolution Imaging Spectroradiometer (MODIS) onboard the Aqua satellite to results obtained from the Multi-Angle Implementation of Atmospheric Correction (MAIAC) algorithm. MAIAC uses a new cloud screening technique, and novel aerosol retrieval and atmospheric correction procedures which are based on time-series and spatial analyses. Our results show considerable improvements of MAIAC processed surface reflectance compared to MYD09/MYD13 with noise levels reduced by a factor of up to 10. Uncertainties in the current MODIS surface reflectance product were mainly due to residual cloud and aerosol contamination which affected the Normalized Difference Vegetation Index (NDVI): During the wet season, with cloud cover ranging between 90% and 99%, conventionally processed NDVI was significantly depressed due to undetected clouds. A smaller reduction in NDVI due to increased aerosol levels was observed during the dry season, with an inverse dependence of NDVI on aerosol optical thickness (AOT). NDVI observations processed with MAIAC showed highly-reproducible and stable inter-annual patterns with little or no dependence on cloud cover, and no significant dependence on AOT (p < 0.05). In addition to a better detection of cloudy pixels, MAIAC obtained about 20-80% more cloud free pixels, depending on season, a considerable amount for land analysis given the very high cloud cover (75-99%) observed at any given time in the area. We conclude that a new generation of atmospheric correction algorithms, such as MAIAC, can help to dramatically improve vegetation estimates over tropical rain forest, ultimately leading to reduced uncertainties in satellite-derived vegetation products globally. (c) 2012 Elsevier Inc. All rights reserved.
C1 [Hilker, Thomas; Lyapustin, Alexei I.; Tucker, Compton J.; Sellers, Piers J.; Hall, Forrest G.; Wang, Yujie] Oregon State Univ, Coll Forestry, Corvallis, OR 97331 USA.
   [Hilker, Thomas; Hall, Forrest G.; Wang, Yujie] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
   [Hilker, Thomas] Univ Maryland Baltimore Cty, Joint Ctr Earth Syst Technol, Baltimore, MD 21228 USA.
RP Hilker, T (reprint author), Oregon State Univ, Coll Forestry, Corvallis, OR 97331 USA.
EM thomas.hilker@oregonstate.edu
RI Lyapustin, Alexei/H-9924-2014
OI Lyapustin, Alexei/0000-0003-1105-5739
FU NASA Terrestrial Ecology Program
FX This research was supported by funding from the NASA Terrestrial Ecology
   Program (Dr. D. Wickland). The anonymous reviewers are thanked for their
   helpful and constructive criticism.
NR 41
TC 37
Z9 39
U1 3
U2 139
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0034-4257
EI 1879-0704
J9 REMOTE SENS ENVIRON
JI Remote Sens. Environ.
PD DEC
PY 2012
VL 127
BP 370
EP 384
DI 10.1016/j.rse.2012.08.035
PG 15
WC Environmental Sciences; Remote Sensing; Imaging Science & Photographic
   Technology
SC Environmental Sciences & Ecology; Remote Sensing; Imaging Science &
   Photographic Technology
GA 047TY
UT WOS:000311865600029
ER

PT J
AU Lyapustin, AI
   Wang, YJ
   Laszlo, I
   Hilker, T
   Hall, FG
   Sellers, PJ
   Tucker, CJ
   Korkin, SV
AF Lyapustin, Alexei I.
   Wang, Yujie
   Laszlo, Istvan
   Hilker, Thomas
   Hall, Forrest G.
   Sellers, Piers J.
   Tucker, Compton J.
   Korkin, Sergey V.
TI Multi-angle implementation of atmospheric correction for MODIS (MAIAC):
   3. Atmospheric correction
SO REMOTE SENSING OF ENVIRONMENT
LA English
DT Article
DE Atmospheric correction; MODIS; MAIAC; Multi-angle implementation of
   atmospheric correction; Time series; Surface reflectance; Aerosols
ID BIDIRECTIONAL REFLECTANCE MODEL; SURFACE; ALBEDO; PRODUCTS; AEROSOL;
   BRDF; RETRIEVAL; ALGORITHM; LAND
AB This paper describes the atmospheric correction (AC) component of the Multi-Angle Implementation of Atmospheric Correction algorithm (MAIAC) which introduces a new way to compute parameters of the Ross-Thick Li-Sparse (RTLS) Bi-directional reflectance distribution function (BRDF), spectral surface albedo and bidirectional reflectance factors (BRF) from satellite measurements obtained by the Moderate Resolution Imaging Spectroradiometer (MODIS). MAIAC uses a time series and spatial analysis for cloud detection, aerosol retrievals and atmospheric correction. It implements a moving window of up to 16 days of MODIS data gridded to 1 km resolution in a selected projection. The RTLS parameters are computed directly by fitting the cloud-free MODIS top of atmosphere (TOA) reflectance data stored in the processing queue. The RTLS retrieval is applied when the land surface is stable or changes slowly. In case of rapid or large magnitude change (as for instance caused by disturbance), MAIAC follows the MODIS operational BRDF/albedo algorithm and uses a scaling approach where the BRDF shape is assumed stable but its magnitude is adjusted based on the latest single measurement. To assess the stability of the surface, MAIAC features a change detection algorithm which analyzes relative change of reflectance in the Red and NIR bands during the accumulation period. To adjust for the reflectance variability with the sun-observer geometry and allow comparison among different days (view geometries), the BRFs are normalized to the fixed view geometry using the RTLS model. An empirical analysis of MODIS data suggests that the RTLS inversion remains robust when the relative change of geometry-normalized reflectance stays below 15%. This first of two papers introduces the algorithm, a second, companion paper illustrates its potential by analyzing MODIS data over a tropical rainforest and assessing errors and uncertainties of MAIAC compared to conventional MODIS products. (c) 2012 Elsevier Inc. All rights reserved.
C1 [Hilker, Thomas] Oregon State Univ, Coll Forestry, Corvallis, OR 97330 USA.
   [Lyapustin, Alexei I.; Wang, Yujie; Hall, Forrest G.; Sellers, Piers J.; Tucker, Compton J.; Korkin, Sergey V.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
   [Wang, Yujie; Hall, Forrest G.] Univ Maryland Baltimore Cty, Joint Ctr Earth Syst Technol, Baltimore, MD 21228 USA.
   [Laszlo, Istvan] NOAA, Camp Springs, MD 20746 USA.
   [Korkin, Sergey V.] Univ Space Res Assoc, Columbia, MD 21044 USA.
RP Hilker, T (reprint author), Oregon State Univ, Coll Forestry, 231 Peavy Hall, Corvallis, OR 97330 USA.
EM thomas.hilker@oregonstate.edu
RI Laszlo, Istvan/F-5603-2010; Lyapustin, Alexei/H-9924-2014
OI Laszlo, Istvan/0000-0002-5747-9708; Lyapustin,
   Alexei/0000-0003-1105-5739
NR 26
TC 47
Z9 49
U1 3
U2 44
PU ELSEVIER SCIENCE INC
PI NEW YORK
PA 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
SN 0034-4257
EI 1879-0704
J9 REMOTE SENS ENVIRON
JI Remote Sens. Environ.
PD DEC
PY 2012
VL 127
BP 385
EP 393
DI 10.1016/j.rse.2012.09.002
PG 9
WC Environmental Sciences; Remote Sensing; Imaging Science & Photographic
   Technology
SC Environmental Sciences & Ecology; Remote Sensing; Imaging Science &
   Photographic Technology
GA 047TY
UT WOS:000311865600030
ER

PT J
AU Drouart, G
   De Breuck, C
   Vernet, J
   Laing, RA
   Seymour, N
   Stern, D
   Haas, M
   Pier, EA
   Rocca-Volmerange, B
AF Drouart, G.
   De Breuck, C.
   Vernet, J.
   Laing, R. A.
   Seymour, N.
   Stern, D.
   Haas, M.
   Pier, E. A.
   Rocca-Volmerange, B.
TI Jet and torus orientations in high redshift radio galaxies
SO ASTRONOMY & ASTROPHYSICS
LA English
DT Article
DE galaxies: high-redshift; galaxies: active; radio continuum: galaxies;
   infrared: galaxies; galaxies: jets; quasars: general
ID ACTIVE GALACTIC NUCLEI; SPITZER-SPACE-TELESCOPE; FAR-INFRARED EMISSION;
   OBSCURING DUST TORI; BLACK-HOLE; ELLIPTIC GALAXIES; SEYFERT-GALAXIES;
   COMPLETE SAMPLES; HOST GALAXIES; 3CR SOURCES
AB We examine the relative orientation of radio jets and dusty tori surrounding the active galactic nucleus (AGN) in powerful radio galaxies at z > 1. The radio core dominance R = P-core(20) (GHz)/P-extended(500) (MHz) serves as an orientation indicator, measuring the ratio between the anisotropic Doppler-beamed core emission and the isotropic lobe emission. Assuming a fixed cylindrical geometry for the hot, dusty torus, we derive its inclination i by fitting optically-thick radiative transfer models to spectral energy distributions obtained with the Spitzer Space Telescope. We find a highly significant anti-correlation (p < 0.0001) between R and i in our sample of 35 type 2 AGN combined with a sample of 18 z similar to 1 3CR sources containing both type 1 and 2 AGN. This analysis provides observational evidence both for the Unified scheme of AGN and for the common assumption that radio jets are in general perpendicular to the plane of the torus. The use of inclinations derived from mid-infrared photometry breaks several degeneracies which have been problematic in earlier analyses. We illustrate this by deriving the core Lorentz factor G from the R-i anti-correlation, finding Gamma greater than or similar to 1.3.
C1 [Drouart, G.; De Breuck, C.; Vernet, J.; Laing, R. A.] European So Observ, D-85748 Garching, Germany.
   [Drouart, G.; Rocca-Volmerange, B.] Inst Astrophys, F-75014 Paris, France.
   [Drouart, G.; Seymour, N.] CSIRO Astron & Space Sci, Epping, NSW 1710, Australia.
   [Stern, D.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
   [Haas, M.] Ruhr Univ Bochum, Astron Inst, D-44801 Bochum, Germany.
   [Pier, E. A.] Oceanit Labs, Honolulu, HI 96813 USA.
RP Drouart, G (reprint author), European So Observ, Karl Schwarzschild Str 2, D-85748 Garching, Germany.
EM gdrouart@eso.org
RI Drouart, Guillaume/C-6049-2016; 
OI Drouart, Guillaume/0000-0003-2275-5466; Vernet,
   Joel/0000-0002-8639-8560; Seymour, Nicholas/0000-0003-3506-5536; De
   Breuck, Carlos/0000-0002-6637-3315
FU Australian Research Council Future Fellowship
FX We thank the referee for the careful reading of the manuscript and their
   constructive comments. The authors thank K. Blundell for useful comments
   and her participation in the improvement of this paper and C. Leipski
   for reanalysing some of the 3CR photometry. Nick Seymour is the
   recipient of an Australian Research Council Future Fellowship. This work
   is based on observations made with the Spitzer Space Telescope, which is
   operated by the Jet Propulsion Laboratory, California Institute of
   Technology under contract with NASA.
NR 90
TC 12
Z9 12
U1 0
U2 1
PU EDP SCIENCES S A
PI LES ULIS CEDEX A
PA 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A,
   FRANCE
SN 0004-6361
J9 ASTRON ASTROPHYS
JI Astron. Astrophys.
PD DEC
PY 2012
VL 548
AR A45
DI 10.1051/0004-6361/201220059
PG 19
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 048HF
UT WOS:000311901200045
ER

PT J
AU Foschini, L
   Angelakis, E
   Fuhrmann, L
   Ghisellini, G
   Hovatta, T
   Lahteenmaki, A
   Lister, ML
   Braito, V
   Gallo, L
   Hamilton, TS
   Kino, M
   Komossa, S
   Pushkarev, AB
   Thompson, DJ
   Tibolla, O
   Tramacere, A
   Carraminana, A
   Carrasco, L
   Falcone, A
   Giroletti, M
   Grupe, D
   Kovalev, YY
   Krichbaum, TP
   Max-Moerbeck, W
   Nestoras, I
   Pearson, TJ
   Porras, A
   Readhead, ACS
   Recillas, E
   Richards, JL
   Riquelme, D
   Sievers, A
   Tammi, J
   Tornikoski, M
   Ungerechts, H
   Zensus, JA
   Celotti, A
   Bonnoli, G
   Doi, A
   Maraschi, L
   Tagliaferri, G
   Tavecchio, F
AF Foschini, L.
   Angelakis, E.
   Fuhrmann, L.
   Ghisellini, G.
   Hovatta, T.
   Lahteenmaki, A.
   Lister, M. L.
   Braito, V.
   Gallo, L.
   Hamilton, T. S.
   Kino, M.
   Komossa, S.
   Pushkarev, A. B.
   Thompson, D. J.
   Tibolla, O.
   Tramacere, A.
   Carraminana, A.
   Carrasco, L.
   Falcone, A.
   Giroletti, M.
   Grupe, D.
   Kovalev, Y. Y.
   Krichbaum, T. P.
   Max-Moerbeck, W.
   Nestoras, I.
   Pearson, T. J.
   Porras, A.
   Readhead, A. C. S.
   Recillas, E.
   Richards, J. L.
   Riquelme, D.
   Sievers, A.
   Tammi, J.
   Tornikoski, M.
   Ungerechts, H.
   Zensus, J. A.
   Celotti, A.
   Bonnoli, G.
   Doi, A.
   Maraschi, L.
   Tagliaferri, G.
   Tavecchio, F.
TI Radio-to-gamma-ray monitoring of the narrow-line Seyfert 1 galaxy PMN
   J0948+0022 from 2008 to 2011
SO ASTRONOMY & ASTROPHYSICS
LA English
DT Article
DE galaxies: jets; galaxies: Seyfert; gamma rays: galaxies; galaxies:
   individual: PMN J0948+0022
ID ACTIVE GALACTIC NUCLEI; LARGE-AREA TELESCOPE; SWIFT ULTRAVIOLET/OPTICAL
   TELESCOPE; INVERSE-COMPTON CATASTROPHE; MULTIWAVELENGTH OBSERVATIONS;
   BRIGHTNESS TEMPERATURE; SDSS J094857.3+002225; RELATIVISTIC JETS; SOURCE
   CATALOG; DATA RELEASE
AB We present more than three years of observations at different frequencies, from radio to high-energy gamma-rays, of the Narrow-Line Seyfert 1 (NLS1) Galaxy PMN J0948+0022 (z = 0.585). This source is the first NLS1 detected at energies above 100 MeV and therefore can be considered the prototype of this emerging new class of gamma-ray emitting active galactic nuclei (AGN). The observations performed from 2008 August 1 to 2011 December 31 confirmed that PMN J0948+0022 generates a powerful relativistic jet, which is able to develop an isotropic luminosity at gamma-rays of the order of 10(48) erg s(-1), at the level of powerful quasars. The evolution of the radiation emission of this source in 2009 and 2010 followed the canonical expectations of relativistic jets with correlated multiwave-length variability (gamma-rays followed by radio emission after a few months), but it was difficult to retrieve a similar pattern in the light curves of 2011. The comparison of gamma-ray spectra before and including 2011 data suggested that there was a softening of the high-energy spectral slope. We selected five specific epochs to be studied by modelling the broad-band spectrum, which are characterised by an outburst at gamma-rays or very low/high flux at other wavelengths. The observed variability can largely be explained by changes in the injected power, the bulk Lorentz factor of the jet, or the electron spectrum. The characteristic time scale of doubling/halving flux ranges from a few days to a few months, depending on the frequency and the sampling rate. The shortest doubling time scale at gamma-rays is 2.3 +/- 0.5 days. These small values underline the need of highly sampled multiwavelength campaigns to better understand the physics of these sources.
C1 [Foschini, L.; Ghisellini, G.; Braito, V.; Celotti, A.; Bonnoli, G.; Maraschi, L.; Tagliaferri, G.; Tavecchio, F.] Osserv Astron Brera, INAF, I-23807 Merate, LC, Italy.
   [Angelakis, E.; Fuhrmann, L.; Komossa, S.; Pushkarev, A. B.; Kovalev, Y. Y.; Krichbaum, T. P.; Nestoras, I.; Zensus, J. A.] Max Planck Inst Radioastron, D-53121 Bonn, Germany.
   [Hovatta, T.; Max-Moerbeck, W.; Pearson, T. J.; Readhead, A. C. S.] CALTECH, Cahill Ctr Astron & Astrophys, Pasadena, CA 91125 USA.
   [Lahteenmaki, A.; Tammi, J.; Tornikoski, M.] Aalto Univ, Metsahovi Radio Observ, Kylmala, Finland.
   [Lister, M. L.; Richards, J. L.] Purdue Univ, Dept Phys, W Lafayette, IN 47907 USA.
   [Gallo, L.] St Marys Univ, Dept Phys & Astron, Halifax, NS B3H 3C3, Canada.
   [Hamilton, T. S.] Shawnee State Univ, Dept Nat Sci, Portsmouth, OH 45662 USA.
   [Kino, M.] Natl Astron Observ Japan, Mitaka, Tokyo 1818588, Japan.
   [Pushkarev, A. B.] Crimean Astrophys Observ, UA-98409 Nauchnyi, Crimea, Ukraine.
   [Pushkarev, A. B.] Pulkovo Observ, St Petersburg 196140, Russia.
   [Thompson, D. J.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
   [Tibolla, O.] Univ Wurzburg, ITPA, D-97074 Wurzburg, Germany.
   [Tramacere, A.] ISDC Data Ctr Astrophys, CH-1290 Versoix, Switzerland.
   [Carraminana, A.; Carrasco, L.; Porras, A.; Recillas, E.] Inst Nacl Astrofis Opt & Electr, Puebla 72840, Mexico.
   [Falcone, A.; Grupe, D.] Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA.
   [Giroletti, M.] Ist Radioastron, INAF, I-40129 Bologna, Italy.
   [Kovalev, Y. Y.] PN Lebedev Phys Inst, Ctr Astro Space, Moscow 117997, Russia.
   [Riquelme, D.; Sievers, A.; Ungerechts, H.] Inst Radioastron Milimetr IRAM, Granada 18012, Spain.
   [Celotti, A.] SISSA, I-34136 Trieste, Italy.
   [Doi, A.] JAXA, Inst Space & Astronaut Sci, Sagamihara, Kanagawa 2298510, Japan.
RP Foschini, L (reprint author), Osserv Astron Brera, INAF, Via E Bianchi 46, I-23807 Merate, LC, Italy.
EM luigi.foschini@brera.inaf.it
RI Kovalev, Yuri/J-5671-2013; Lahteenmaki, Anne/L-5987-2013; Pearson,
   Timothy/N-2376-2015; Pushkarev, Alexander/M-9997-2015; 
OI Kovalev, Yuri/0000-0001-9303-3263; Ghisellini,
   Gabriele/0000-0002-0037-1974; Pearson, Timothy/0000-0001-5213-6231;
   Hamilton, Timothy/0000-0002-9753-1769; Foschini,
   Luigi/0000-0001-8678-0324
FU INSU/CNRS (France); MPG (Germany); IGN (Spain); International Max Planck
   Research School (IMPRS) for Astronomy and Astrophysics at the
   Universities of Bonn and Cologne; Academy of Finland [212656, 210338,
   121148]; NASA [NNX08AW31G, NNX11A043G, NAS5-00136]; NSF [AST-0808050,
   AST-1109911, 1066293]; NASA-Fermi grant [NNX08AV67G]; Russian Foundation
   for Basic Research [11-02-00368]; basic research program "Active
   processes in galactic and extragalactic objects" of the Physical
   Sciences Division of the Russian Academy of Sciences; Dynasty
   Foundation; KAKENHI [24540240]; Japan Society for the Promotion of
   Science (JSPS) [24340042]; ASI-INAF [I/009/10/0]; Alfred P. Sloan
   Foundation; National Science Foundation; US Department of Energy;
   National Aeronautics and Space Administration; Japanese Monbukagakusho;
   Max Planck Society; Higher Education Funding Council for England;
   American Museum of Natural History; Astrophysical Institute Potsdam;
   University of Basel; University of Cambridge; Case Western Reserve
   University; University of Chicago; Drexel University; Fermilab;
   Institute for Advanced Study; Japan Participation Group; Johns Hopkins
   University; Joint Institute for Nuclear Astrophysics; Kavli Institute
   for Particle Astrophysics and Cosmology; Korean Scientist Group; Chinese
   Academy of Sciences (LAMOST); Los Alamos National Laboratory; Max Planck
   Institute for Astronomy (MPIA); Max Planck Institute for Astrophysics
   (MPA); New Mexico State University; Ohio State University; University of
   Pittsburgh; University of Portsmouth; Princeton University; United
   States Naval Observatory; University of Washington
FX We acknowledge the internal referee of the Fermi/LAT Collaboration, F.
   D'Ammando, for useful comments. This research is partly based on
   observations with the 100 m telescope of the MPIfR (Max-Planck-Institut
   fur Radioastronomie) at Effelsberg and with the IRAM 30 m telescope.
   IRAM is supported by INSU/CNRS (France), MPG (Germany), and IGN (Spain).
   I. Nestoras is funded by the International Max Planck Research School
   (IMPRS) for Astronomy and Astrophysics at the Universities of Bonn and
   Cologne. The Metsahovi team acknowledges the support from the Academy of
   Finland to our observing projects (numbers 212656, 210338, 121148, and
   others). The OVRO 40 m monitoring program is supported in part by NASA
   grants NNX08AW31G and NNX11A043G, as well as NSF grants AST-0808050 and
   AST-1109911. The National Radio Astronomy Observatory is a facility of
   the National Science Foundation operated under cooperative agreement by
   Associated Universities, Inc. This research made use of data from the
   MOJAVE database that is maintained by the MOJAVE team (Lister et al.
   2009). The MOJAVE project is supported by a NASA-Fermi grant NNX08AV67G.
   This work made use of the Swinburne University of Technology software
   correlator, developed as part of the Australian Major National Research
   Facilities Programme and operated under licence. YYK is partly supported
   by the Russian Foundation for Basic Research (project 11-02-00368), the
   basic research program "Active processes in galactic and extragalactic
   objects" of the Physical Sciences Division of the Russian Academy of
   Sciences and the Dynasty Foundation. This work is partially supported by
   Grant-in-Aid for Scientific Researches, KAKENHI 24540240 (MK) and
   24340042 (AD) from Japan Society for the Promotion of Science (JSPS).
   The Fermi/LAT Collaboration acknowledges generous ongoing support from a
   number of agencies and institutes that have supported both the
   development and operation of the LAT as well as scientific data
   analysis. These include the National Aeronautics and Space
   Administration and the Department of Energy in the United States, the
   Commissariat a l'Energie Atomique and the Centre National de la
   Recherche Scientifique/Institut National de Physique Nucleaire et de
   Physique des Particules in France, the Agenzia Spaziale Italiana, and
   the Istituto Nazionale di Fisica Nucleare in Italy, the Ministry of
   Education, Culture, Sports, Science and Technology (MEXT), High Energy
   Accelerator Research Organization (KEK) and Japan Aerospace Exploration
   Agency (JAXA) in Japan, and the K. A. Wallenberg Foundation, the Swedish
   Research Council and the Swedish National Space Board in Sweden.
   Additional support for science analysis during the operations phase is
   gratefully acknowledged from the Istituto Nazionale di Astrofisica in
   Italy and the Centre National d'Etudes Spatiales in France. Swift at PSU
   is supported by NASA contract NAS5-00136. SK would like to thank the
   Aspen Center for Physics for their hospitality. The Aspen Center for
   Physics is supported by NSF Grant #1066293. This work has been partially
   supported by ASI-INAF Grant I/009/10/0. This research made use of data
   obtained from the High Energy Astrophysics Science Archive Research
   Center (HEASARC), provided by NASA's Goddard Space Flight Center.
   Funding for the SDSS and SDSS-II was provided by the Alfred P.; Sloan
   Foundation, the Participating Institutions, the National Science
   Foundation, the US Department of Energy, the National Aeronautics and
   Space Administration, the Japanese Monbukagakusho, the Max Planck
   Society, and the Higher Education Funding Council for England. The SDSS
   Web Site is http://www.sdss.org/. The SDSS is managed by the
   Astrophysical Research Consortium for the Participating Institutions.
   Participating institutions are the American Museum of Natural History,
   Astrophysical Institute Potsdam, University of Basel, University of
   Cambridge, Case Western Reserve University, University of Chicago,
   Drexel University, Fermilab, the Institute for Advanced Study, the Japan
   Participation Group, Johns Hopkins University, the Joint Institute for
   Nuclear Astrophysics, the Kavli Institute for Particle Astrophysics and
   Cosmology, the Korean Scientist Group, the Chinese Academy of Sciences
   (LAMOST), Los Alamos National Laboratory, the Max Planck Institute for
   Astronomy (MPIA), the Max Planck Institute for Astrophysics (MPA), New
   Mexico State University, Ohio State University, University of
   Pittsburgh, University of Portsmouth, Princeton University, the United
   States Naval Observatory, and the University of Washington.
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JI Astron. Astrophys.
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SC Astronomy & Astrophysics
GA 048HF
UT WOS:000311901200106
ER

PT J
AU Lestrade, JF
   Matthews, BC
   Sibthorpe, B
   Kennedy, GM
   Wyatt, MC
   Bryden, G
   Greaves, JS
   Thilliez, E
   Moro-Martin, A
   Booth, M
   Dent, WRF
   Duchene, G
   Harvey, PM
   Horner, J
   Kalas, P
   Kavelaars, JJ
   Phillips, NM
   Rodriguez, DR
   Su, KYL
   Wilner, DJ
AF Lestrade, J. -F.
   Matthews, B. C.
   Sibthorpe, B.
   Kennedy, G. M.
   Wyatt, M. C.
   Bryden, G.
   Greaves, J. S.
   Thilliez, E.
   Moro-Martin, A.
   Booth, M.
   Dent, W. R. F.
   Duchene, G.
   Harvey, P. M.
   Horner, J.
   Kalas, P.
   Kavelaars, J. J.
   Phillips, N. M.
   Rodriguez, D. R.
   Su, K. Y. L.
   Wilner, D. J.
TI A DEBRIS disk around the planet hosting M-star GJ 581 spatially resolved
   with Herschel
SO ASTRONOMY & ASTROPHYSICS
LA English
DT Article
DE circumstellar matter; planetary systems; planets and satellites:
   formation
ID SOLAR-TYPE STARS; LOW-MASS STARS; SPITZER-SPACE-TELESCOPE; SUN-LIKE
   STARS; M-CIRCLE-PLUS; AU-MICROSCOPII; M-DWARFS; CIRCUMSTELLAR DISKS;
   HABITABLE ZONE; COLLISIONAL EVOLUTION
AB Debris disks have been found primarily around intermediate and solar mass stars (spectral types A-K) but rarely around low mass M-type stars. We have spatially resolved a debris disk around the remarkable M3-type star GJ 581 hosting multiple planets using deep PACS images at 70, 100 and 160 mu m as part of the DEBRIS Program on the Herschel Space Observatory. This is the second spatially resolved debris disk found around an M-type star, after the one surrounding the young star AU Mic (12 Myr). However, GJ 581 is much older (2-8 Gyr), and is X-ray quiet in the ROSAT data. We fit an axisymmetric model of the disk to the three PACS images and found that the best fit model is for a disk extending radially from 25 +/- 12 AU to more than 60 AU. Such a cold disk is reminiscent of the Kuiper belt but it surrounds a low mass star (0.3 M-circle dot) and its fractional dust luminosity L-dust/L-* of similar to 10(-4) is much higher. The inclination limits of the disk found in our analysis make the masses of the planets small enough to ensure the long-term stability of the system according to some dynamical simulations. The disk is collisionally dominated down to submicron-sized grains and the dust cannot be expelled from the system by r;adiation or wind pressures because of the low luminosity and low X-ray luminosity of GJ 581. We suggest that the correlation between low-mass planets and debris disks recently found for G-type stars also applies to M-type stars. Finally, the known planets, of low masses and orbiting within 0.3 AU from the star, cannot dynamically perturb the disk over the age of the star, suggesting that an additional planet exists at larger distance that is stirring the disk to replenish the dust.
C1 [Lestrade, J. -F.; Thilliez, E.] CNRS, Observ Paris, F-75014 Paris, France.
   [Matthews, B. C.; Kavelaars, J. J.] Natl Res Council Canada, Herzberg Inst Astrophys HIA, Victoria, BC, Canada.
   [Sibthorpe, B.] Royal Observ, UK Astron Technol Ctr UKATC, Edinburgh EH9 3HJ, Midlothian, Scotland.
   [Kennedy, G. M.; Wyatt, M. C.] Univ Cambridge, Inst Astron IoA, Cambridge CB3 0HA, England.
   [Bryden, G.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
   [Greaves, J. S.] Univ St Andrews, Sch Phys & Astron, St Andrews KY16 9SS, Fife, Scotland.
   [Moro-Martin, A.] Ctr Astrobiol, Dept Astrophys, Madrid 28850, Spain.
   [Matthews, B. C.; Booth, M.; Kavelaars, J. J.] Univ Victoria, Dept Phys & Astron, Victoria, BC V8P 5C2, Canada.
   [Dent, W. R. F.; Phillips, N. M.] ALMA JAO, Santiago, Chile.
   [Duchene, G.; Kalas, P.] Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA.
   [Duchene, G.] UJF Grenoble 1 CNRS INSU, IPAG, F-38041 Grenoble, France.
   [Kalas, P.] SETI Inst, Mountain View, CA 94043 USA.
   [Harvey, P. M.] Univ Texas Austin, Dept Astron, Austin, TX 78712 USA.
   [Horner, J.] Univ New S Wales, Dept Astrophys & Opt, Sch Phys, Sydney, NSW 2052, Australia.
   [Rodriguez, D. R.] Univ Chile, Dept Astron, Santiago, Chile.
   [Su, K. Y. L.] Univ Arizona, Steward Observ, Tucson, AZ 85721 USA.
   [Wilner, D. J.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
RP Lestrade, JF (reprint author), CNRS, Observ Paris, 61 Av Observ, F-75014 Paris, France.
EM jean-francois.lestrade@obspm.fr
OI Booth, Mark/0000-0001-8568-6336; Horner, Jonti/0000-0002-1160-7970; Su,
   Kate/0000-0002-3532-5580; Kennedy, Grant/0000-0001-6831-7547
FU Centre National d'Etudes Spatiales (CNES); Australian government through
   ARC Grant [DP0774000]; Space Science Enhancement Program grant from the
   Canadian Space Agency
FX The Herschel spacecraft was designed, built, tested, and launched under
   a contract to ESA managed by the Herschel/Planck Project team by an
   industrial consortium under the overall responsibility of the prime
   contractor Thales Alenia Space (Cannes), and including Astrium
   (Friedrichshafen) responsible for the payload module and for system
   testing at spacecraft level, Thales Alenia Space (Turin) responsible for
   the service module, and Astrium (Toulouse) responsible for the
   telescope, with in excess of a hundred subcontractors. We thank Ben
   Zuckerman for comments on a draft of this article. J.F.L. gratefully
   acknowledges the financial support of Centre National d'Etudes Spatiales
   (CNES). J.H. gratefully acknowledges the financial support of the
   Australian government through ARC Grant DP0774000. M.B. is funded
   through a Space Science Enhancement Program grant from the Canadian
   Space Agency.
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JI Astron. Astrophys.
PD DEC
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UT WOS:000311901200086
ER

PT J
AU Melin, JB
   Aghanim, N
   Bartelmann, M
   Bartlett, JG
   Betoule, M
   Bobin, J
   Carvalho, P
   Chon, G
   Delabrouille, J
   Diego, JM
   Harrison, DL
   Herranz, D
   Hobson, M
   Kneissl, R
   Lasenby, AN
   Le Jeune, M
   Lopez-Caniego, M
   Mazzotta, P
   Rocha, GM
   Schaefer, BM
   Starck, JL
   Waizmann, JC
   Yvon, D
AF Melin, J. -B.
   Aghanim, N.
   Bartelmann, M.
   Bartlett, J. G.
   Betoule, M.
   Bobin, J.
   Carvalho, P.
   Chon, G.
   Delabrouille, J.
   Diego, J. M.
   Harrison, D. L.
   Herranz, D.
   Hobson, M.
   Kneissl, R.
   Lasenby, A. N.
   Le Jeune, M.
   Lopez-Caniego, M.
   Mazzotta, P.
   Rocha, G. M.
   Schaefer, B. M.
   Starck, J. -L.
   Waizmann, J. C.
   Yvon, D.
TI A comparison of algorithms for the construction of SZ cluster catalogues
SO ASTRONOMY & ASTROPHYSICS
LA English
DT Article
DE cosmology: observations; galaxies: clusters: general; galaxies:
   clusters: intracluster medium; cosmic background radiation; methods:
   data analysis
ID X-RAY-PROPERTIES; SUNYAEV-ZELDOVICH CLUSTERS; STAR-FORMING GALAXIES;
   DARK-MATTER HALOES; LINEAR COMBINATION; INFRARED-EMISSION; SCALING
   RELATIONS; PLANCK MISSION; POWER SPECTRA; SKY SURVEY
AB We evaluate the construction methodology of an all-sky catalogue of galaxy clusters detected through the Sunyaev-Zel'dovich (SZ) effect. We perform an extensive comparison of twelve algorithms applied to the same detailed simulations of the millimeter and submillimeter sky based on a Planck-like case. We present the results of this "SZ Challenge" in terms of catalogue completeness, purity, astrometric and photometric reconstruction. Our results provide a comparison of a representative sample of SZ detection algorithms and highlight important issues in their application. In our study case, we show that the exact expected number of clusters remains uncertain (about a thousand cluster candidates at vertical bar b vertical bar > 20 deg with 90% purity) and that it depends on the SZ model and on the detailed sky simulations, and on algorithmic implementation of the detection methods. We also estimate the astrometric precision of the cluster candidates which is found of the order of similar to 2 arcmin on average, and the photometric uncertainty of about 30%, depending on flux.
C1 [Melin, J. -B.; Yvon, D.] CEA Saclay, DSM Irfu SPP, F-91191 Gif Sur Yvette, France.
   [Aghanim, N.] CNRS, Inst Astrophys Spatiale, F-91400 Orsay, France.
   [Aghanim, N.] Univ Paris 11, Ctr Univ Orsay, F-91400 Orsay, France.
   [Bartelmann, M.; Waizmann, J. C.] Heidelberg Univ, Zentrum Astron, Inst Theoret Astrophys, D-69120 Heidelberg, Germany.
   [Bartlett, J. G.; Betoule, M.; Delabrouille, J.; Le Jeune, M.] APC, F-75205 Paris 13, France.
   [Bartlett, J. G.] Univ Paris 07, F-75205 Paris 13, France.
   [Bartlett, J. G.; Rocha, G. M.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
   [Bobin, J.; Starck, J. -L.] CEA Saclay, DSM Irfu SAp, F-91191 Gif Sur Yvette, France.
   [Carvalho, P.; Hobson, M.; Lasenby, A. N.] Univ Cambridge, Cavendish Lab, Astrophys Grp, Cambridge CB3 0HE, England.
   [Chon, G.] Max Planck Inst Extraterr Phys, D-85748 Garching, Germany.
   [Diego, J. M.; Herranz, D.; Lopez-Caniego, M.] Inst Fis Cantabria CSIC UC, Santander 39005, Spain.
   [Harrison, D. L.; Lasenby, A. N.] Kavli Inst Cosmol Cambridge, Cambridge CB3 OHA, England.
   [Harrison, D. L.; Lasenby, A. N.] Inst Astron, Cambridge CB3 OHA, England.
   [Kneissl, R.] ALMA JAO, Santiago, Chile.
   [Kneissl, R.] ESO, Santiago, Chile.
   [Mazzotta, P.] Univ Roma Tor Vergata, I-00133 Rome, Italy.
   [Schaefer, B. M.] Astron Rech Inst, D-69120 Heidelberg, Germany.
   [Waizmann, J. C.] Univ Bologna, Dipartimento Astron, I-40127 Bologna, Italy.
RP Melin, JB (reprint author), CEA Saclay, DSM Irfu SPP, F-91191 Gif Sur Yvette, France.
EM jean-baptiste.melin@cea.fr
RI Lopez-Caniego, Marcos/M-4695-2013; Bartelmann, Matthias/A-5336-2014;
   Herranz, Diego/K-9143-2014; Bobin, Jerome/P-3729-2014; Yvon,
   Dominique/D-2280-2015; Mazzotta, Pasquale/B-1225-2016; 
OI Herranz, Diego/0000-0003-4540-1417; Bobin, Jerome/0000-0003-1457-7890;
   Mazzotta, Pasquale/0000-0002-5411-1748; Lopez-Caniego,
   Marcos/0000-0003-1016-9283; Bartelmann, Matthias/0000-0001-6951-3582;
   Starck, Jean-Luc/0000-0003-2177-7794
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JI Astron. Astrophys.
PD DEC
PY 2012
VL 548
AR A51
DI 10.1051/0004-6361/201015689
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ER

PT J
AU Molina, M
   Landi, R
   Bassani, L
   Malizia, A
   Stephen, JB
   Bazzano, A
   Bird, AJ
   Gehrels, N
AF Molina, M.
   Landi, R.
   Bassani, L.
   Malizia, A.
   Stephen, J. B.
   Bazzano, A.
   Bird, A. J.
   Gehrels, N.
TI Flat-spectrum radio sources as likely counterparts of unidentified
   INTEGRAL sources (Research Note)
SO ASTRONOMY & ASTROPHYSICS
LA English
DT Article
DE gamma rays: galaxies; X-rays: galaxies; galaxies: active; quasars:
   general
ID IBIS/ISGRI SURVEY SOURCES; NRAO PMN SURVEYS; X-RAY TELESCOPE; ALL-SKY
   SURVEY; SOURCE CATALOG; FIND COUNTERPARTS; GHZ SURVEY; BLAZARS; MISSION;
   OBJECTS
AB Many sources in the fourth INTEGRAL/IBIS catalogue are still unidentified since they lack an optical counterpart. An important tool that can help in identifying and classifying these sources is the cross-correlation with radio catalogues, which are very sensitive and positionally accurate. Moreover, the radio properties of a source, such as the spectrum or morphology, could provide further insight into its nature. In particular, flat-spectrum radio sources at high Galactic latitudes are likely to be AGN, possibly associated to a blazar or to the compact core of a radio galaxy. Here we present a small sample of 6 sources extracted from the fourth INTEGRAL/IBIS catalogue that are still unidentified or unclassified, but which are very likely associated with a bright, flat-spectrum radio object. To confirm the association and to study the source X-ray spectral parameters, we performed X-ray follow-up observations with Swift/XRT of all objects. We report in this note the overall results obtained from this search and discuss the nature of each individual INTEGRAL source. We find that 5 of the 6 radio associations are also detected in X-rays; furthermore, in 3 cases they are the only counterpart found. More specifically, IGR J06073-0024 is a flat-spectrum radio quasar at z = 1.08, IGR J14488-4008 is a newly discovered radio galaxy, while IGR J18129-0649 is an AGN of a still unknown type. The nature of two sources (IGR J07225-3810 and IGR J19386-4653) is less well defined, since in both cases we find another X-ray source in the INTEGRAL error circle; nevertheless, the flat-spectrum radio source, likely to be a radio loud AGN, remains a viable and, in fact, a more convincing association in both cases. Only for the last object (IGR J11544-7618) could we not find any convincing counterpart since the radio association is not an X-ray emitter, while the only X-ray source seen in the field is a G star and therefore unlikely to produce the persistent emission seen by INTEGRAL.
C1 [Molina, M.; Landi, R.; Bassani, L.; Malizia, A.; Stephen, J. B.] IASF INAF, I-40129 Bologna, Italy.
   [Bazzano, A.] IAPS INAF, I-00133 Rome, Italy.
   [Bird, A. J.] Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, Hants, England.
   [Gehrels, N.] NASA Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
RP Molina, M (reprint author), IASF INAF, Via Gobetti 101, I-40129 Bologna, Italy.
EM molina@iasfbo.inaf.it
FU ASI [ASI/033/10/0, ASI/INAFI/009/10/0]
FX This research has made use of data obtained from the SIMBAD database
   operated at the CDS, Strasbourg, France and from the High Energy
   Astrophysics Science Archive Research Center (HEASARC), provided by
   NASA's Goddard Space Flight Center NASA/IPAC Extragalactic Database
   (NED). The authors acknowledge financial support from the ASI under
   contracts ASI/033/10/0 and ASI/INAFI/009/10/0.
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SN 1432-0746
J9 ASTRON ASTROPHYS
JI Astron. Astrophys.
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PT J
AU Mosser, B
   Goupil, MJ
   Belkacem, K
   Marques, JP
   Beck, PG
   Bloemen, S
   De Ridder, J
   Barban, C
   Deheuvels, S
   Elsworth, Y
   Hekker, S
   Kallinger, T
   Ouazzani, RM
   Pinsonneault, M
   Samadi, R
   Stello, D
   Garcia, RA
   Klaus, TC
   Li, J
   Mathur, S
   Morris, RL
AF Mosser, B.
   Goupil, M. J.
   Belkacem, K.
   Marques, J. P.
   Beck, P. G.
   Bloemen, S.
   De Ridder, J.
   Barban, C.
   Deheuvels, S.
   Elsworth, Y.
   Hekker, S.
   Kallinger, T.
   Ouazzani, R. M.
   Pinsonneault, M.
   Samadi, R.
   Stello, D.
   Garcia, R. A.
   Klaus, T. C.
   Li, J.
   Mathur, S.
   Morris, R. L.
TI Spin down of the core rotation in red giants
SO ASTRONOMY & ASTROPHYSICS
LA English
DT Article
DE stars: oscillations; stars: interiors; stars: rotation; stars: late-type
ID SOLAR-LIKE OSCILLATIONS; ANGULAR-MOMENTUM TRANSPORT; INTERMEDIATE-MASS
   STARS; HORIZONTAL-BRANCH STARS; PRE-MAIN-SEQUENCE; 1ST 4 MONTHS;
   MIXED-MODES; KEPLER DATA; GRAVITY-WAVES; ASTEROSEISMOLOGY
AB Context. The space mission Kepler provides us with long and uninterrupted photometric time series of red giants. We are now able to probe the rotational behaviour in their deep interiors using the observations of mixed modes.
   Aims. We aim to measure the rotational splittings in red giants and to derive scaling relations for rotation related to seismic and fundamental stellar parameters.
   Methods. We have developed a dedicated method for automated measurements of the rotational splittings in a large number of red giants. Ensemble asteroseismology, namely the examination of a large number of red giants at different stages of their evolution, allows us to derive global information on stellar evolution.
   Results. We have measured rotational splittings in a sample of about 300 red giants. We have also shown that these splittings are dominated by the core rotation. Under the assumption that a linear analysis can provide the rotational splitting, we observe a small increase of the core rotation of stars ascending the red giant branch. Alternatively, an important slow down is observed for red-clump stars compared to the red giant branch. We also show that, at fixed stellar radius, the specific angular momentum increases with increasing stellar mass.
   Conclusions. Ensemble asteroseismology indicates what has been indirectly suspected for a while: our interpretation of the observed rotational splittings leads to the conclusion that the mean core rotation significantly slows down during the red giant phase. The slow-down occurs in the last stages of the red giant branch. This spinning down explains, for instance, the long rotation periods measured in white dwarfs.
C1 [Mosser, B.; Goupil, M. J.; Belkacem, K.; Barban, C.; Ouazzani, R. M.; Samadi, R.] Univ Paris 07, Univ Paris 06, CNRS, Observ Paris,LESIA, F-92195 Meudon, France.
   [Marques, J. P.] Univ Gottingen, Inst Astrophys, D-37077 Gottingen, Germany.
   [Beck, P. G.; Bloemen, S.; De Ridder, J.; Kallinger, T.] Katholieke Univ Leuven, Inst Sterrenkunde, B-3001 Louvain, Belgium.
   [Deheuvels, S.] Yale Univ, Dept Astron, New Haven, CT 06520 USA.
   [Elsworth, Y.; Hekker, S.] Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England.
   [Hekker, S.] Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1098 XH Amsterdam, Netherlands.
   [Ouazzani, R. M.] Univ Liege, Inst Astrophys & Geophys, B-4000 Liege, Belgium.
   [Pinsonneault, M.] Ohio State Univ, Dept Astron, Columbus, OH 43210 USA.
   [Stello, D.] Univ Sydney, Sch Phys, Sydney Inst Astron, Sydney, NSW 2006, Australia.
   [Garcia, R. A.] Univ Paris 07, IRFU, SAp, Lab AIM,CEA,DSM,CNRS, F-91191 Gif Sur Yvette, France.
   [Klaus, T. C.] NASA, Ames Res Ctr, Orbital Sci Corp, Moffett Field, CA 94035 USA.
   [Li, J.; Morris, R. L.] NASA, Ames Res Ctr, SETI Inst, Moffett Field, CA 94035 USA.
   [Mathur, S.] NCAR, High Altitude Observ, Boulder, CO 80307 USA.
RP Mosser, B (reprint author), Univ Paris 07, Univ Paris 06, CNRS, Observ Paris,LESIA, F-92195 Meudon, France.
EM benoit.mosser@obspm.fr
OI Kallinger, Thomas/0000-0003-3627-2561; Garcia,
   Rafael/0000-0002-8854-3776
FU NASA's Science Mission Directorate; NASA grant [NNX12AE17G]; National
   Science Foundation; European Research Council under the European
   Community's Seventh Framework Programme (FP7)/ERC grant; Netherlands
   Organisation for Scientific research (NWO); UK STFC; European Communitys
   Seventh Framework Program (FP7) [269194]
FX Funding for this Discovery mission is provided by NASA's Science Mission
   Directorate. This work partially used data analyzed under the NASA grant
   NNX12AE17G. NCAR is supported by the National Science Foundation. P.G.B.
   has received funding from the European Research Council under the
   European Community's Seventh Framework Programme (FP7/2007-2013)/ERC
   grant agreement No. PROSPERITY. SH acknowledges financial support from
   the Netherlands Organisation for Scientific research (NWO). Y.E.
   acknowledges financial support from the UK STFC. R.A.G. acknowledges the
   support of the European Communitys Seventh Framework Program
   (FP7/2007-2013) under grant agreement No. 269194 (IRSES/ASK).
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PT J
AU Murgia, M
   Markevitch, M
   Govoni, F
   Parma, P
   Fanti, R
   de Ruiter, HR
   Mack, KH
AF Murgia, M.
   Markevitch, M.
   Govoni, F.
   Parma, P.
   Fanti, R.
   de Ruiter, H. R.
   Mack, K. -H.
TI Chandra observations of dying radio sources in galaxy clusters
SO ASTRONOMY & ASTROPHYSICS
LA English
DT Article
DE X-rays: galaxies: clusters; galaxies: active; galaxies: clusters:
   general
ID X-RAY CAVITIES; SKY SURVEY; RADIATION; EVOLUTION; BUBBLES; PROFILE;
   SEARCH; PLASMA; SAMPLE; CORES
AB Context. The dying radio sources represent a very interesting and largely unexplored stage of the active galactic nucleus (AGN) evolution. They are considered to be very rare, and almost all of the few known ones were found in galaxy clusters. However, considering the small number detected so far, it has not been possible to draw any firm conclusions about their X-ray environment.
   Aims. We present X-ray observations performed with the Chandra satellite of the three galaxy clusters Abell 2276, ZwCl 1829.3+6912, and RX J1852.1+5711, which harbor at their center a dying radio source with an ultra-steep spectrum that we recently discovered.
   Methods. We analyzed the physical properties of the X-ray emitting gas surrounding these elusive radio sources. We determined the global X-ray properties of the clusters, derived the azimuthally averaged profiles of metal abundance, gas temperature, density, and pressure. Furthermore, we estimated the total mass profiles.
   Results. The large-scale X-ray emission is regular and spherical, suggesting a relaxed state for these systems. Indeed, we found that the three clusters are also characterized by significant enhancements in the metal abundance and declining temperature profiles toward the central region. For all these reasons, we classified RX J1852.1+5711, Abell 2276, and ZwCl 1829.3+6912 as cool-core galaxy clusters.
   Conclusions. We calculated the non-thermal pressure of the radio lobes assuming that the radio sources are in the minimum energy condition. For all dying sources we found that this is on average about one to two orders of magnitude lower than that of the external gas, as found for many other radio sources at the center of galaxy groups and clusters. We found marginal evidence for the presence of X-ray surface brightness depressions coincident with the fossil radio lobes of the dying sources in A2276 and ZwCl 1829.3+691. We estimated the outburst age and energy output for these two dying sources. The energy power from the AGN outburst is significantly higher than the X-ray luminosity in both clusters. Indeed, it is sufficient that a small fraction of this power is dissipated in the intra-cluster medium to reheat the cool cores.
C1 [Murgia, M.; Govoni, F.] INAF Osservatorio Astron Cagliari, I-09012 Capoterra, CA, Italy.
   [Markevitch, M.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
   [Parma, P.; Fanti, R.; de Ruiter, H. R.; Mack, K. -H.] INAF Ist Radioastron, I-40129 Bologna, Italy.
RP Murgia, M (reprint author), INAF Osservatorio Astron Cagliari, Str 54, I-09012 Capoterra, CA, Italy.
EM matteo@oa-cagliari.inaf.it
OI Murgia, Matteo/0000-0002-4800-0806; Govoni, Federica/0000-0003-3644-3084
FU National Science Foundation; National Aeronautics and Space
   Administration; Alfred P. Sloan Foundation; U.S. Department of Energy;
   Japanese Monbukagakusho; Max Planck Society; Higher Education Funding
   Council for England; American Museum of Natural History; Astrophysical
   Institute Potsdam; University of Basel; University of Cambridge; Case
   Western Reserve University; University of Chicago; Drexel University;
   Fermilab; Institute for Advanced Study; Japan Participation Group; Johns
   Hopkins University; Joint Institute for Nuclear Astrophysics; Kavli
   Institute for Particle Astrophysics and Cosmology; Korean Scientist
   Group; Chinese Academy of Sciences (LAMOST); Los Alamos National
   Laboratory; Max-Planck-Institute for Astronomy (MPIA);
   Max-Planck-Institute for Astrophysics (MPA); New Mexico State
   University; Ohio State University; University of Pittsburgh; University
   of Portsmouth; Princeton University; United States Naval Observatory;
   University of Washington; National Aeronautics and Space
   Administration's Earth Science Technology Office, Computation
   Technologies Project [NCC5-626]; NASA; California Institute of
   Technology;  [ASI-INAF I/009/10/0]
FX We acknowledge the referee for helpful and constructive comments that
   improved the paper. F. G. and M. M. are grateful for the hospitality of
   the Harvard-Smithsonian Center for Astrophysics, where part of this
   research was done. Support was provided by Chandra grant GO9-0133X, NASA
   contract NAS8-39073, and the Smithsonian Institution. We acknowledge
   financial contribution from the agreement ASI-INAF I/009/10/0. The
   National Radio Astronomy Observatory is operated by Associated
   Universities, Inc., under contract with the National Science Foundation.
   This research made use of the NASA/IPAC Extragalactic Database (NED)
   which is operated by the Jet Propulsion Laboratory, California Institute
   of Technology, under contract with the National Aeronautics and Space
   Administration. The optical DSS2 red images were taken from:
   http://archive.eso.org/dss/dss. Funding for the SDSS and SDSS-II has
   been provided by the Alfred P. Sloan Foundation, the Participating
   Institutions, the National Science Foundation, the U.S. Department of
   Energy, the National Aeronautics and Space Administration, the Japanese
   Monbukagakusho, the Max Planck Society, and the Higher Education Funding
   Council for England. The SDSS Web Site is http://www.sdss.org/. The SDSS
   is managed by the Astrophysical Research Consortium for the
   Participating Institutions. The Participating Institutions are the
   American Museum of Natural History, Astrophysical Institute Potsdam,
   University of Basel, University of Cambridge, Case Western Reserve
   University, University of Chicago, Drexel University, Fermilab, the
   Institute for Advanced Study, the Japan Participation Group, Johns
   Hopkins University, the Joint Institute for Nuclear Astrophysics, the
   Kavli Institute for Particle Astrophysics and Cosmology, the Korean
   Scientist Group, the Chinese Academy of Sciences (LAMOST), Los Alamos
   National Laboratory, the Max-Planck-Institute for Astronomy (MPIA), the
   Max-Planck-Institute for Astrophysics (MPA), New Mexico State
   University, Ohio State University, University of Pittsburgh, University
   of Portsmouth, Princeton University, the United States Naval
   Observatory, and the University of Washington. This research made use of
   Montage, funded by the National Aeronautics and Space Administration's
   Earth Science Technology Office, Computation Technologies Project, under
   Cooperative Agreement Number NCC5-626 between NASA and the California
   Institute of Technology. Montage is maintained by the NASA/IPAC Infrared
   Science Archive.
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PT J
AU Rambaux, N
   Castillo-Rogez, JC
   Le Maistre, S
   Rosenblatt, P
AF Rambaux, N.
   Castillo-Rogez, J. C.
   Le Maistre, S.
   Rosenblatt, P.
TI Rotational motion of Phobos
SO ASTRONOMY & ASTROPHYSICS
LA English
DT Article
DE celestial mechanics; planets and satellites: dynamical evolution and
   stability; planets and satellites: individual: Phobos
ID ORBITAL MOTION; MARTIAN MOONS; MOLTEN CORE; LIBRATION; GRAVITY; LAWS;
   EXPRESSIONS; PRECESSION; MERCURY; ESAPHO
AB Context. Phobos is in synchronous spin-orbit resonance around Mars, like our Moon around the Earth. As a consequence, the rotational period of Phobos is equal in average to its orbital period. The variations of its rotational motion are described by oscillations, called physical librations, which yield information of its interior structure. The largest libration of Phobos rotational motion was first detected in 1981 and the determination of this libration has recently been improved using Mars EXpress observations.
   Aims. The objective of this paper is to present the spectrum of Phobos' librations by using recent orbital ephemerides and geophysical knowledge of this Martian satellite. The analysis of the librational spectrum highlights the relationship between dynamical and geophysical properties of the body, but is also useful for cartographic and geodetic purposes for future space missions dedicated to Phobos.
   Methods. We developed a numerical model of Phobos' rotation that includes the point-mass Mars acting on the dynamical shape of Phobos, expanded to the third degree, and the effect of Mars' oblateness. The forced librations spectrum is extracted through a frequency analysis.
   Results. We find that the libration in longitude presents a quadratic term that coincides with the secular acceleration of Phobos falling onto Mars. The primary libration in longitude has a period equal to the anomalistic mean motion, whereas the primary libration in latitude has a period equal to the draconic mean motion (node to node). Both librations have amplitudes of about one degree leading to a surface displacement of about 200 m. These two components dominate the libration spectrum by a factor one hundred. Phobos' third degree gravity harmonics and Mars' oblateness affect the librations amplitude at 10 4 degree. This is small but detectable from long-term tracking of a lander. The determination of the librational spectrum would bring strong constraints on the principal torques acting on the Martian moon, as well as on the possible presence of lateral variations in density predicted by certain geophysical models of the Stickney crater formation. We also investigate the obliquity variations of Phobos and find that their amplitudes are larger than the mean value of the obliquity.
   Conclusions. Phobos exhibits a rich and varied set of librational oscillations. The main librations and the librations close to the proper frequencies are the most sensitive to the interior structure. On the other hand, the superimposed effect of large amplitude oscillations is likely to make the determination of the mean obliquity challenging.
C1 [Rambaux, N.] Univ Paris 06, Paris 06, France.
   [Rambaux, N.] CNRS, UMR 8028, Observ Paris, IMCCE, F-75014 Paris, France.
   [Castillo-Rogez, J. C.] CALTECH, Jet Prop Lab, Pasadena, CA USA.
   [Le Maistre, S.; Rosenblatt, P.] Royal Observ Belgium, B-1180 Brussels, Belgium.
RP Rambaux, N (reprint author), Univ Paris 06, Paris 06, France.
EM Nicolas.Rambaux@imcce.fr; julie.c.castillo@jpl.nasa.gov;
   s.maistre@oma.be; rosenb@oma.be
FU Belgian PRODEX program; EC [263466]
FX Part of this work has been conducted at the Jet Propulsion Laboratory,
   California Institute of Technology, under contract to NASA. Government
   sponsorship acknowledged. Part of this work was financially supported by
   the Belgian PRODEX program managed by the European Space Agency in
   collaboration with the Belgian Federal Science Policy Office. Part of
   this work is financially supported by the EC FP7 Grant Agreement 263466.
   We thank Bruce Bills for his review. N.R. thanks Philippe Robutel on the
   discussion to determine the initial conditions of Phobos and Michele
   Chapront-Touze, who kindly provided her analytical tables.
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PT J
AU Ziegler, M
   Rauch, T
   Werner, K
   Koppen, J
   Kruk, JW
AF Ziegler, M.
   Rauch, T.
   Werner, K.
   Koeppen, J.
   Kruk, J. W.
TI BD-22 degrees 3467, a DAO-type star exciting the nebula Abell 35
SO ASTRONOMY & ASTROPHYSICS
LA English
DT Article
DE stars: abundances; stars: atmospheres; stars: evolution; stars:
   individual: BD-22 3467; white dwarfs; planetary nebulae: individual: A66
   35
ID MODEL STELLAR ATMOSPHERES; HOT WHITE-DWARFS; ACCELERATED
   LAMBDA-ITERATION; TO-OXYGEN RATIO; PLANETARY-NEBULAE;
   INTERSTELLAR-MEDIUM; SPECTROSCOPIC ANALYSIS; RADIATIVE LEVITATION;
   SPECTRAL-ANALYSIS; MASS-LOSS
AB Context. Spectral analyses of hot, compact stars with non-local thermodynamical equilibrium (NLTE) model-atmosphere techniques allow the precise determination of photospheric parameters such as the effective temperature (T-eff), the surface gravity (log g), and the chemical composition. The derived photospheric metal abundances are crucial constraints for stellar evolutionary theory.
   Aims. Previous spectral analyses of the exciting star of the nebula A35, BD-22 degrees 3467, were based on He+C+N+O+Si+Fe models only. For our analysis, we use state-of-the-art fully metal-line blanketed NLTE model atmospheres that consider opacities of 23 elements from hydrogen to nickel. We aim to identify all observed lines in the ultraviolet (UV) spectrum of BD-22 degrees 3467 and to determine the abundances of the respective species precisely.
   Methods. For the analysis of high-resolution and high signal-to-noise ratio (S/N) far-ultraviolet (FUSE) and UV (HST/STIS) observations, we combined stellar-atmosphere models and interstellar line-absorption models to fully reproduce the entire observed UV spectrum.
   Results. The best agreement with the UV observation of BD-22 degrees 3467 is achieved at T-eff = 80 +/- 10 kK and log g = 7.2 +/- 0.3. While T-eff of previous analyses is verified, log g is significantly lower. We re-analyzed lines of silicon and iron (1/100 and about solar abundances, respectively) and for the first time in this star identified argon, chromium, manganese, cobalt, and nickel and determined abundances of 12, 70, 35, 150, and 5 times solar, respectively. Our results partially agree with predictions of diffusion models for DA-type white dwarfs. A combination of photospheric and interstellar line-absorption models reproduces more than 90% of the observed absorption features. The stellar mass is M approximate to 0.48 M-circle dot.
   Conclusions. BD-22 degrees 3467 may not have been massive enough to ascend the asymptotic giant branch and may have evolved directly from the extended horizontal branch to the white dwarf state. This would explain why it is not surrounded by a planetary nebula. However, the star, ionizes the ambient interstellar matter, mimicking a planetary nebula.
C1 [Ziegler, M.; Rauch, T.; Werner, K.] Univ Tubingen, Inst Astron & Astrophys, Kepler Ctr Astro & Particle Phys, D-72076 Tubingen, Germany.
   [Koeppen, J.] Univ Strasbourg, Observ Astron Strasbourg, F-67000 Strasbourg, France.
   [Kruk, J. W.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
RP Ziegler, M (reprint author), Univ Tubingen, Inst Astron & Astrophys, Kepler Ctr Astro & Particle Phys, Sand 1, D-72076 Tubingen, Germany.
EM rauch@astro.uni-tuebingen.de
FU NASA [NAS5-26666, NAS5-26555]; German Research Foundation (DFG)
   [WE1312/38-1]; German Aerospace Center (DLR) [05 OR 0806]; NASA Office
   of Space Science [NNX09AF08G]
FX Based on observations with the NASA/ESA Hubble Space Telescope, obtained
   at the Space Telescope Science Institute, which is operated by the
   Association of Universities for Research in Astronomy, Inc., under NASA
   contract NAS5-26666.; M.Z. was supported by the German Research
   Foundation (DFG, grant WE1312/38-1). T.R. is supported by the German
   Aerospace Center (DLR, grant 05 OR 0806). This research has made use of
   the SIMBAD database, operated at CDS, Strasbourg, France. This research
   has made use of NASA's Astrophysics Data System. This work used the
   profile-fitting procedure OWENS developed by M. Lemoine and the FUSE
   French Team. Some of the data presented in this paper were obtained from
   the Mikulski Archive for Space Telescopes (MAST). STScI is operated by
   the Association of Universities for Research in Astronomy, Inc., under
   NASA contract NAS5-26555. Support for MAST for non-HST data is provided
   by the NASA Office of Space Science via grant NNX09AF08G and by other
   grants and contracts.
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PT J
AU Evans, PA
   Fridriksson, JK
   Gehrels, N
   Homan, J
   Osborne, JP
   Siegel, M
   Beardmore, A
   Handbauer, P
   Gelbord, J
   Kennea, JA
   Smith, M
   Zhu, Q
   Aasi, J
   Abadie, J
   Abbott, BP
   Abbott, R
   Abbott, TD
   Abernathy, M
   Accadia, T
   Acernese, F
   Adams, C
   Adams, T
   Addesso, P
   Adhikari, R
   Affeldt, C
   Agathos, M
   Agatsuma, K
   Ajith, P
   Allen, B
   Allocca, A
   Ceron, EA
   Amariutei, D
   Anderson, SB
   Anderson, WG
   Arai, K
   Araya, MC
   Ast, S
   Aston, SM
   Astone, P
   Atkinson, D
   Aufmuth, P
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   Babak, S
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   Barton, MA
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   Beker, MG
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   Benacquista, M
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   Bertolini, A
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   Bhadbade, T
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   Cavalier, F
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   Cella, G
   Cepeda, C
   Cesarini, E
   Chalermsongsak, T
   Charlton, P
   Chassande-Mottin, E
   Chen, W
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   Chen, Y
   Chincarini, A
   Chiummo, A
   Cho, HS
   Chow, J
   Christensen, N
   Chua, SSY
   Chung, CTY
   Chung, S
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   Clark, DE
   Clark, JA
   Clayton, JH
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   Cohadon, PF
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   Degallaix, J
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   Dergachev, V
   DeRosa, R
   Dhurandhar, S
   Di Fiore, L
   Di Lieto, A
   Di Palma, I
   Emilio, MDP
   Di Virgilio, A
   Diaz, M
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   Donovan, F
   Dooley, KL
   Doravari, S
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   Evans, K
   Evans, M
   Evans, T
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   Fafone, V
   Fairhurst, S
   Farr, BF
   Favata, M
   Fazi, D
   Fehrmann, H
   Feldbaum, D
   Ferrante, I
   Ferrini, F
   Fidecaro, F
   Finn, LS
   Fiori, I
   Fisher, RP
   Flaminio, R
   Foley, S
   Forsi, E
   Forte, LA
   Fotopoulos, N
   Fournier, JD
   Franc, J
   Franco, S
   Frasca, S
   Frasconi, F
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   Frei, Z
   Freise, A
   Frey, R
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CA LIGO Sci Collaboration Virgo Colla
TI SWIFT FOLLOW-UP OBSERVATIONS OF CANDIDATE GRAVITATIONAL-WAVE TRANSIENT
   EVENTS
SO ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
LA English
DT Article
DE gravitational waves; ultraviolet: general; X-rays: general
ID GAMMA-RAY BURSTS; ELECTROMAGNETIC COUNTERPARTS; XMM-NEWTON; HOST
   GALAXIES; TELESCOPE; AFTERGLOW; GRBS; CALIBRATION; PHOTOMETRY; RADIATION
AB We present the first multi-wavelength follow-up observations of two candidate gravitational-wave (GW) transient events recorded by LIGO and Virgo in their 2009-2010 science run. The events were selected with low latency by the network of GW detectors (within less than 10 minutes) and their candidate sky locations were observed by the Swift observatory (within 12 hr). Image transient detection was used to analyze the collected electromagnetic data, which were found to be consistent with background. Off-line analysis of the GW data alone has also established that the selected GW events show no evidence of an astrophysical origin; one of them is consistent with background and the other one was a test, part of a "blind injection challenge." With this work we demonstrate the feasibility of rapid follow-ups of GW transients and establish the sensitivity improvement joint electromagnetic and GW observations could bring. This is a first step toward an electromagnetic follow-up program in the regime of routine detections with the advanced GW instruments expected within this decade. In that regime, multi-wavelength observations will play a significant role in completing the astrophysical identification of GW sources. We present the methods and results from this first combined analysis and discuss its implications in terms of sensitivity for the present and future instruments.
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RP Evans, PA (reprint author), Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England.
RI Marchesoni, Fabio/A-1920-2008; Costa, Cesar/G-7588-2012; CONTE,
   ANDREA/J-6667-2012; prodi, giovanni/B-4398-2010; Vicere,
   Andrea/J-1742-2012; Gemme, Gianluca/C-7233-2008; Puppo,
   Paola/J-4250-2012; Lam, Ping Koy/A-5276-2008; Ciani,
   Giacomo/G-1036-2011; Punturo, Michele/I-3995-2012; Strain,
   Kenneth/D-5236-2011; Zhao, Chunnong/C-2403-2013; Ju, Li/C-2623-2013;
   Miao, Haixing/O-1300-2013; Khazanov, Efim/B-6643-2014; Salemi,
   Francesco/F-6988-2014; Mitrofanov, Valery/D-8501-2012; Bilenko,
   Igor/D-5172-2012; Nelson, John/H-7215-2014; Losurdo,
   Giovanni/K-1241-2014; Danilishin, Stefan/K-7262-2012; Canuel,
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   Farit/D-8113-2012; McClelland, David/E-6765-2010; Vecchio,
   Alberto/F-8310-2015; Parisi, Maria/D-2817-2013; Steinlechner,
   Sebastian/D-5781-2013; Strigin, Sergey/I-8337-2012; Colla,
   Alberto/J-4694-2012; Drago, Marco/E-7134-2013; Vyatchanin,
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   Leonid/I-2953-2012; Gammaitoni, Luca/B-5375-2009; Cesarini,
   Elisabetta/C-4507-2017; Chow, Jong/A-3183-2008; Frey,
   Raymond/E-2830-2016; Di Virgilio, Angela Dora Vittoria/E-9078-2015;
   Sergeev, Alexander/F-3027-2017; Harms, Jan/J-4359-2012; Ward,
   Robert/I-8032-2014; Gehring, Tobias/A-8596-2016; Howell,
   Eric/H-5072-2014; Heidmann, Antoine/G-4295-2016; Bao,
   Yiliang/G-9848-2016; Ott, Christian/G-2651-2011; mosca,
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   Mirko/D-8531-2012; Travasso, Flavio/J-9595-2016; Bartos,
   Imre/A-2592-2017; Cella, Giancarlo/A-9946-2012; Mow-Lowry,
   Conor/F-8843-2015; Finn, Lee Samuel/A-3452-2009; Sigg,
   Daniel/I-4308-2015; Tacca, Matteo/J-1599-2015; Graef,
   Christian/J-3167-2015; Ottaway, David/J-5908-2015; Garufi,
   Fabio/K-3263-2015; Neri, Igor/F-1482-2010; Shaddock, Daniel/A-7534-2011;
   Postiglione, Fabio/O-4744-2015; Rocchi, Alessio/O-9499-2015; Martelli,
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   David/0000-0001-6210-5842; Vecchio, Alberto/0000-0002-6254-1617;
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   Martelli, Filippo/0000-0003-3761-8616; 
FU Netherlands Organisation for Scientific Research; Polish Ministry of
   Science and Higher Education; FOCUS Programme of Foundation for Polish
   Science; Royal Society; Scottish Funding Council; Scottish Universities
   Physics Alliance; National Aeronautics and Space Administration;
   Carnegie Trust; Leverhulme Trust; David and Lucile Packard Foundation;
   Research Corporation; Alfred P. Sloan Foundation; NASA [NNX09AL61G]; UK
   Space Agency
FX Foundation for Fundamental Research on Matter supported by the
   Netherlands Organisation for Scientific Research, the Polish Ministry of
   Science and Higher Education, the FOCUS Programme of Foundation for
   Polish Science, the Royal Society, the Scottish Funding Council, the
   Scottish Universities Physics Alliance, The National Aeronautics and
   Space Administration, the Carnegie Trust, the Leverhulme Trust, the
   David and Lucile Packard Foundation, the Research Corporation, and the
   Alfred P. Sloan Foundation. This work was also partially supported
   through a NASA grant/cooperative agreement number NNX09AL61G to the
   Massachusetts Institute of Technology. P. Evans and J.P. Osborne
   acknowledge financial support from the UK Space Agency.
NR 59
TC 42
Z9 43
U1 3
U2 88
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0067-0049
EI 1538-4365
J9 ASTROPHYS J SUPPL S
JI Astrophys. J. Suppl. Ser.
PD DEC
PY 2012
VL 203
IS 2
AR 28
DI 10.1088/0067-0049/203/2/28
PG 14
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 051BX
UT WOS:000312100500012
ER

PT J
AU Cook, BI
   Wolkovich, EM
   Davies, TJ
   Ault, TR
   Betancourt, JL
   Allen, JM
   Bolmgren, K
   Cleland, EE
   Crimmins, TM
   Kraft, NJB
   Lancaster, LT
   Mazer, SJ
   McCabe, GJ
   McGill, BJ
   Parmesan, C
   Pau, S
   Regetz, J
   Salamin, N
   Schwartz, MD
   Travers, SE
AF Cook, Benjamin I.
   Wolkovich, Elizabeth M.
   Davies, T. Jonathan
   Ault, Toby R.
   Betancourt, Julio L.
   Allen, Jenica M.
   Bolmgren, Kjell
   Cleland, Elsa E.
   Crimmins, Theresa M.
   Kraft, Nathan J. B.
   Lancaster, Lesley T.
   Mazer, Susan J.
   McCabe, Gregory J.
   McGill, Brian J.
   Parmesan, Camille
   Pau, Stephanie
   Regetz, James
   Salamin, Nicolas
   Schwartz, Mark D.
   Travers, Steven E.
TI Sensitivity of Spring Phenology to Warming Across Temporal and Spatial
   Climate Gradients in Two Independent Databases
SO ECOSYSTEMS
LA English
DT Article
DE phenology; climate responders; NECTAR; PEP725; sensitivity; climate
   change
ID GROWING DEGREE-DAYS; SPECIES DISTRIBUTIONS; FLOWERING TIME;
   CENTRAL-EUROPE; CHANGE IMPACTS; PLANTS; VARIABILITY; MECHANISMS;
   PATTERNS; EARLIER
AB Disparate ecological datasets are often organized into databases post hoc and then analyzed and interpreted in ways that may diverge from the purposes of the original data collections. Few studies, however, have attempted to quantify how biases inherent in these data (for example, species richness, replication, climate) affect their suitability for addressing broad scientific questions, especially in under-represented systems (for example, deserts, tropical forests) and wild communities. Here, we quantitatively compare the sensitivity of species first flowering and leafing dates to spring warmth in two phenological databases from the Northern Hemisphere. One-PEP725-has high replication within and across sites, but has low species diversity and spans a limited climate gradient. The other-NECTAR-includes many more species and a wider range of climates, but has fewer sites and low replication of species across sites. PEP725, despite low species diversity and relatively low seasonality, accurately captures the magnitude and seasonality of warming responses at climatically similar NECTAR sites, with most species showing earlier phenological events in response to warming. In NECTAR, the prevalence of temperature responders significantly declines with increasing mean annual temperature, a pattern that cannot be detected across the limited climate gradient spanned by the PEP725 flowering and leafing data. Our results showcase broad areas of agreement between the two databases, despite significant differences in species richness and geographic coverage, while also noting areas where including data across broader climate gradients may provide added value. Such comparisons help to identify gaps in our observations and knowledge base that can be addressed by ongoing monitoring and research efforts. Resolving these issues will be critical for improving predictions in understudied and under-sampled systems outside of the temperature seasonal mid-latitudes.
C1 [Cook, Benjamin I.] NASA, Goddard Inst Space Studies, New York, NY 10025 USA.
   [Cook, Benjamin I.] Lamont Doherty Earth Observ, Palisades, NY USA.
   [Wolkovich, Elizabeth M.; Cleland, Elsa E.] Univ Calif San Diego, Div Biol Sci, La Jolla, CA 92093 USA.
   [Wolkovich, Elizabeth M.; Kraft, Nathan J. B.] Univ British Columbia, Biodivers Res Ctr, Vancouver, BC V5Z 1M9, Canada.
   [Davies, T. Jonathan] McGill Univ, Dept Biol, Montreal, PQ H3A 1B1, Canada.
   [Ault, Toby R.] Natl Ctr Atmospher Res, Boulder, CO 80307 USA.
   [Betancourt, Julio L.] US Geol Survey, Tucson, AZ USA.
   [Allen, Jenica M.] Univ Connecticut, Dept Ecol & Evolutionary Biol, Storrs, CT USA.
   [Bolmgren, Kjell] Lund Univ, Dept Biol, Theoret Populat Ecol & Evolut Grp, Lund, Sweden.
   [Crimmins, Theresa M.] USA Natl Phenol Network, Tucson, AZ USA.
   [Lancaster, Lesley T.; Pau, Stephanie; Regetz, James] Natl Ctr Ecol Anal & Synth, Santa Barbara, CA USA.
   [Mazer, Susan J.] Univ Calif Santa Barbara, Dept Ecol Evolut & Marine Biol, Santa Barbara, CA 93106 USA.
   [McCabe, Gregory J.] US Geol Survey, Denver Fed Ctr, Denver, CO 80225 USA.
   [McGill, Brian J.] Univ Maine, Orono, ME USA.
   [Parmesan, Camille] Univ Texas Austin, Austin, TX 78712 USA.
   [Parmesan, Camille] Univ Plymouth, Marine Sci Inst Portland Sq, Plymouth PL4 8AA, Devon, England.
   [Salamin, Nicolas] Univ Lausanne, Dept Ecol & Evolut, Lausanne, Switzerland.
   [Schwartz, Mark D.] Univ Wisconsin, Dept Geog, Milwaukee, WI 53201 USA.
   [Travers, Steven E.] N Dakota State Univ, Dept Biol Sci, Fargo, ND 58105 USA.
   [Bolmgren, Kjell] Swedish Univ Agr Sci, Swedish Natl Phenol Network, Asa, Sweden.
RP Cook, BI (reprint author), NASA, Goddard Inst Space Studies, New York, NY 10025 USA.
EM benjamin.i.cook@nasa.gov
RI Cook, Benjamin/H-2265-2012; Kraft, Nathan/A-2817-2012; Bolmgren,
   Kjell/E-1459-2016; McGill, Brian/A-3476-2008; 
OI Kraft, Nathan/0000-0001-8867-7806; Bolmgren, Kjell/0000-0001-9552-9684;
   McGill, Brian/0000-0002-0850-1913; Crimmins, Theresa/0000-0001-9592-625X
FU National Center for Ecological Analysis and Synthesis; National Science
   Foundation (NSF) [EF- 0553768]; University of California, Santa Barbara;
   State of California; NSF [IOS-0639794, DBI-0905806]; NSERC CREATE
FX Primary data collections were made possible through the support of many
   granting agencies; please see ESM for complete information and grant
   numbers. This work was conducted as a part of the "Forecasting
   Phenology" Working Group supported by the National Center for Ecological
   Analysis and Synthesis, a center funded by the National Science
   Foundation (NSF) (Grant #EF- 0553768), the University of California,
   Santa Barbara, and the State of California. Special thanks to the many
   data holders and data managers who assisted us throughout the process
   including K. Vanderbilt and K. Wetherill (SEV), Chris Nytch and Jess
   Zimmerman (LUQ), George Aldridge and David Inouye (GTH), John O'Keefe
   (HVD), and Paul Huth, Shanan Smiley, and John Thompson from the Mohonk
   Preserve (MHK). Some data used in this publication were obtained by
   scientists of the Hubbard Brook Ecosystem Study; this publication has
   not been reviewed by those scientists. The Hubbard Brook Experimental
   Forest is operated and maintained by the Northeastern Research Station,
   U.S. Department of Agriculture, Newtown Square, Pennsylvania. Additional
   support was also provided by the USA National Phenology Research
   Coordination Network, supported by NSF grant #IOS-0639794. NJBK was
   supported by the NSERC CREATE Training Program in Biodiversity Research.
   PEP725 data were provided by the members of the PEP725 project. Special
   thanks to E. Koch and W. Lipa for providing the PEP725 data and the
   accompanying climate data. Support for EMW came from the NSF
   Postdoctoral Fellow program (Grant #DBI-0905806). Thanks to the editors,
   two anonymous reviewers, Jonathan Hanes, and David Inouye for providing
   valuable comments that significantly improved the quality of this
   manuscript. LDEO contribution number #7580.
NR 45
TC 26
Z9 27
U1 12
U2 161
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 1432-9840
J9 ECOSYSTEMS
JI Ecosystems
PD DEC
PY 2012
VL 15
IS 8
BP 1283
EP 1294
DI 10.1007/s10021-012-9584-5
PG 12
WC Ecology
SC Environmental Sciences & Ecology
GA 051QY
UT WOS:000312143300006
ER

PT J
AU Tabakov, D
   Rozier, KY
   Vardi, MY
AF Tabakov, Deian
   Rozier, Kristin Y.
   Vardi, Moshe Y.
TI Optimized temporal monitors for SystemC
SO FORMAL METHODS IN SYSTEM DESIGN
LA English
DT Article
DE SystemC; Assertion checkers; Monitors; Testing
ID SAFETY PROPERTIES; MODEL CHECKING; AUTOMATA; VERIFICATION;
   SPECIFICATIONS
AB SystemC is a modeling language built as an extension of C++. Its growing popularity and the increasing complexity of designs have motivated research efforts aimed at the verification of SystemC models using assertion-based verification (ABV), where the designer asserts properties that capture the design intent in a formal language such as PSL or SVA. The model then can be verified against the properties using runtime or formal verification techniques. In this paper we focus on automated generation of runtime monitors from temporal properties. Our focus is on minimizing runtime overhead, rather than monitor size or monitor-generation time. We identify four issues in monitor generation: state minimization, alphabet representation, alphabet minimization, and monitor encoding. We conduct extensive experimentation and identify a combination of settings that offers the best performance in terms of runtime overhead.
C1 [Tabakov, Deian] Schlumberger Informat Solut, Houston, TX 77056 USA.
   [Rozier, Kristin Y.] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
   [Vardi, Moshe Y.] Rice Univ, Houston, TX 77005 USA.
RP Tabakov, D (reprint author), Schlumberger Informat Solut, 5599 San Felipe Str 100, Houston, TX 77056 USA.
EM dtabakov@slb.com; Kristin.Y.Rozier@nasa.gov; vardi@cs.rice.edu
FU NSF [CCF-0613889, CCF-0728882, EIA-0216467]; BSF [9800096]; Shared
   University Grid at Rice (SUG@R); NASA's Airspace Systems Program
FX Work supported in part by NSF grants CCF-0613889, CCF-0728882, and Grant
   EIA-0216467, BSF grant 9800096, the Shared University Grid at Rice
   (SUG@R), NASA's Airspace Systems Program, a gift from Intel, and a
   partnership between Rice University, Sun Microsystems, and Sigma
   Solutions. A preliminary version of this work was reported by D. Tabakov
   and M. Y. Vardi in "Optimized temporal monitors for SystemC," Proc. 1st
   Int'l Conf. on Runtime Verification, Lecture Notes in Computer Science
   6418, Springer, pp. 436-451, 2010.
NR 43
TC 4
Z9 4
U1 0
U2 4
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0925-9856
EI 1572-8102
J9 FORM METHOD SYST DES
JI Form. Methods Syst. Des.
PD DEC
PY 2012
VL 41
IS 3
SI SI
BP 236
EP 268
DI 10.1007/s10703-011-0139-8
PG 33
WC Computer Science, Theory & Methods
SC Computer Science
GA 054DX
UT WOS:000312325300002
ER

PT J
AU Seyster, J
   Dixit, K
   Huang, XW
   Grosu, R
   Havelund, K
   Smolka, SA
   Stoller, SD
   Zadok, E
AF Seyster, Justin
   Dixit, Ketan
   Huang, Xiaowan
   Grosu, Radu
   Havelund, Klaus
   Smolka, Scott A.
   Stoller, Scott D.
   Zadok, Erez
TI InterAspect: aspect-oriented instrumentation with GCC
SO FORMAL METHODS IN SYSTEM DESIGN
LA English
DT Article
DE Program instrumentation; Aspect-oriented programming; GCC; Monitoring;
   Tracecut
AB We present the InterAspect instrumentation framework for GCC, a widely used compiler infrastructure. The addition of plug-in support in the latest release of GCC makes it an attractive platform for runtime instrumentation, as GCC plug-ins can directly add instrumentation by transforming the compiler's intermediate representation. Such transformations, however, require expert knowledge of GCC internals. InterAspect addresses this situation by allowing instrumentation plug-ins to be developed using the familiar vocabulary of Aspect-Oriented Programming: pointcuts, join points, and advice functions. Moreover, InterAspect uses specific information about each join point in a pointcut, possibly including results of static analysis, to support powerful customized instrumentation. We describe the InterAspect API and present several examples that illustrate its practical utility as a runtime-verification platform. We also introduce a tracecut system that uses InterAspect to construct program monitors that are formally specified as regular expressions.
C1 [Seyster, Justin; Dixit, Ketan; Huang, Xiaowan; Grosu, Radu; Smolka, Scott A.; Stoller, Scott D.; Zadok, Erez] SUNY Stony Brook, Dept Comp Sci, Stony Brook, NY 11794 USA.
   [Havelund, Klaus] CALTECH, Jet Prop Lab, Pasadena, CA USA.
RP Seyster, J (reprint author), SUNY Stony Brook, Dept Comp Sci, Stony Brook, NY 11794 USA.
EM jseyster@cs.sunysb.edu
FU AFOSR [FA9550-09-1-0481]; NSF [CCF-0926190, CCF-0613913, CNS-0831298,
   CNS-0509230]; ONR [N00014-07-1-0928, N00014-09-1-0651]
FX We thank the anonymous reviewers for their valuable comments. Part of
   the research described herein was carried out at the Jet Propulsion
   Laboratory (JP), California Institute of Technology, under a contract
   with the National Aeronautics and Space Administration. Research
   described here was supported in part by AFOSR Grant FA9550-09-1-0481,
   NSF Grants CCF-0926190, CCF-0613913, CNS-0831298, and CNS-0509230, and
   ONR Grants N00014-07-1-0928 and N00014-09-1-0651.
NR 20
TC 4
Z9 5
U1 0
U2 1
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0925-9856
J9 FORM METHOD SYST DES
JI Form. Methods Syst. Des.
PD DEC
PY 2012
VL 41
IS 3
SI SI
BP 295
EP 320
DI 10.1007/s10703-012-0171-3
PG 26
WC Computer Science, Theory & Methods
SC Computer Science
GA 054DX
UT WOS:000312325300004
ER

PT J
AU Molod, A
AF Molod, Andrea
TI Constraints on the Profiles of Total Water PDF in AGCMs from AIRS and a
   High-Resolution Model
SO JOURNAL OF CLIMATE
LA English
DT Article
ID ATMOSPHERIC INFRARED SOUNDER; LARGE-SCALE MODELS; CLOUD COVER; IN-SITU;
   VAPOR; VALIDATION; SATELLITE; SCHEME
AB Atmospheric general circulation model (AGCM) cloud parameterizations generally include an assumption about the subgrid-scale probability distribution function (PDF) of total water and its vertical profile in the present study, the Atmospheric Infrared Sounder (AIRS) monthly-mean cloud amount and relative humidity fields are used to compute a proxy for the second moment of an AGCM total water PDF called the "RH01 diagnostic," which is the AIRS mean relative humidity for cloud fractions of 0.1 or less. The dependence of the second moment on horizontal grid resolution is analyzed using results from a high-resolution global model simulation.
   The AIRS-derived RH01 diagnostic is generally larger near the surface than aloft, indicating a narrower PDF near the surface, and varies with the type of underlying surface. High-resolution model results show that the vertical structure of profiles of the AGCM PDF second moment is unchanged as the grid resolution changes from 200 to 100 to 50 km, and that the second-moment profiles shift toward higher values with decreasing grid spacing. Several Goddard Earth Observing System, version 5 (GEOS-5), AGCM simulations were performed with several choices for the profile of the PDF second moment. The resulting cloud and relative humidity fields were shown to be quite sensitive to the prescribed profile, and the use of a profile based on the AIRS-derived proxy results in improvements relative to observational estimates. The AIRS-guided total water PDF profiles, including their dependence on underlying surface type and on horizontal resolution, have been implemented in the version of the GEOS-5 AGCM used for publicly released simulations.
C1 [Molod, Andrea] Univ Maryland, Earth Syst Sci Interdisciplinary Ctr, College Pk, MD 20740 USA.
   [Molod, Andrea] NASA, Goddard Space Flight Ctr, Global Modeling & Assimilat Off, Greenbelt, MD 20771 USA.
RP Molod, A (reprint author), Univ Maryland, Earth Syst Sci Interdisciplinary Ctr, 5825 Univ Res Court,Suite 4001, College Pk, MD 20740 USA.
EM andrea.m.molod@nasa.gov
FU NASA [WBS 802678.02.17.01.11]
FX The author gratefully acknowledges the helpful discussions about the
   work presented here with Max Suarez. Interactions with J. Susskind about
   AIRS data were useful in choosing the correct products and gaining a
   sense of their reliability. The author also wishes to acknowledge W.
   Putman for performing the high-resolution model simulations with GEOS-5
   and making them available. This research was supported by the NASA
   Modeling, Analysis, and Prediction program under WBS 802678.02.17.01.11.
   Computational support was provided by the NASA Center for Climate
   Simulation (and/or the NASA Advanced Supercomputing Division).
NR 21
TC 10
Z9 10
U1 0
U2 11
PU AMER METEOROLOGICAL SOC
PI BOSTON
PA 45 BEACON ST, BOSTON, MA 02108-3693 USA
SN 0894-8755
EI 1520-0442
J9 J CLIMATE
JI J. Clim.
PD DEC
PY 2012
VL 25
IS 23
BP 8341
EP 8352
DI 10.1175/JCLI-D-11-00412.1
PG 12
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 051EF
UT WOS:000312107300019
ER

PT J
AU McKinney, P
   Holt, B
   Matsumoto, K
AF McKinney, Paul
   Holt, Benjamin
   Matsumoto, Katsumi
TI Small eddies observed in Lake Superior using SAR and sea surface
   temperature imagery
SO JOURNAL OF GREAT LAKES RESEARCH
LA English
DT Article
DE Great Lakes; Lake Superior; Remote sensing; AVHRR; SAR
ID SYNTHETIC-APERTURE RADAR; KEWEENAW CURRENT; GREAT-LAKES; FRONTS; MODEL;
   WIND
AB Making use of the fine resolution of satellite SAR imagery, we observe small eddies during the spring and summer months in several locations in Lake Superior. During these months there is a thermal gradient between warmer nearshore waters and colder offshore waters which enhances cyclonic coastal currents. Using spaceborne SAR imagery from the European Space Agency's ERS-1 and ERS-2 missions from 1992 to 1998, we observe small eddies, identifying and mapping basic eddy characteristics including diameter, location, and rotational sense. In total, 45 eddies were located, of which 41 were cyclonic and 4 anticyclonic. Average diameter was 9.8 km and average distance to shore was 8.1 km. Based on sea surface temperature data from AVHRR, the eddies are located within the region of sharp thermal gradients of order 3-5 degrees C per 3 km. Spatial and temporal coverage was uneven, however, more eddies were seen in SAR images taken in late summer along the southern and eastern shores as well as areas where the boundary current interacts with topographic features including islands and promontories. (C) 2012 International Association for Great Lakes Research. Published by Elsevier B.V. All rights reserved.
C1 [McKinney, Paul; Matsumoto, Katsumi] Univ Minnesota, Dept Earth Sci, Minneapolis, MN 55455 USA.
   [Holt, Benjamin] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
RP McKinney, P (reprint author), Univ Minnesota, Dept Earth Sci, 310 Pillsbury Dr SE, Minneapolis, MN 55455 USA.
EM p-mcki@umn.edu; benjamin.m.holt@jpl.nasa.gov; katsumi@umn.edu
OI Matsumoto, Katsumi/0000-0002-5832-9592
FU UM Department of Earth Sciences; NSF [OCE-0825576]; McKnight Land Grant
   Professorship; National Aeronautics and Space Administration; Jet
   Propulsion Laboratory, California Institute of Technology
FX Support for this research was provided by student fellowships of the UM
   Department of Earth Sciences to PM and by NSF grant OCE-0825576 and
   McKnight Land Grant Professorship awarded to KM. BH was supported by the
   National Aeronautics and Space Administration through a contract with
   the Jet Propulsion Laboratory, California Institute of Technology. All
   SAR images were provided by the European Space Agency through an
   approved Envisat principal investigator study (BH).
NR 33
TC 4
Z9 4
U1 0
U2 15
PU ELSEVIER SCI LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
SN 0380-1330
J9 J GREAT LAKES RES
JI J. Gt. Lakes Res.
PD DEC
PY 2012
VL 38
IS 4
BP 786
EP 797
DI 10.1016/j.jglr.2012.09.023
PG 12
WC Environmental Sciences; Limnology; Marine & Freshwater Biology
SC Environmental Sciences & Ecology; Marine & Freshwater Biology
GA 052FM
UT WOS:000312183100019
ER

PT J
AU Lawson, JW
   Daw, MS
   Squire, TH
   Bauschlicher, CW
AF Lawson, John W.
   Daw, Murray S.
   Squire, Thomas H.
   Bauschlicher, Charles W., Jr.
TI Computational Modeling of Grain Boundaries in ZrB2: Implications for
   Lattice Thermal Conductivity
SO JOURNAL OF THE AMERICAN CERAMIC SOCIETY
LA English
DT Article
ID ZIRCONIUM DIBORIDE; MOLECULAR-DYNAMICS; CERAMICS; TRANSPORT; HAFNIUM;
   ALUMINA; SYSTEMS; HFB2
AB A combination of ab initio, atomistic, and finite element methods (FEM) was used to investigate fundamental properties of grain boundaries and grain boundary networks and their impact on lattice thermal conductivity in the ultra high-temperature ceramic ZrB2. The structure, energetics, and lattice thermal conductance of certain low energy grain boundaries were studied. Atomic models of these boundaries were relaxed using density functional theory. Information about bonding across the interfaces was determined from the electron localization function. Interfacial thermal conductances were computed using nonequilibrium molecular dynamics. Microstructural models were used to determine the reduction in lattice thermal conductivity due grain boundary networks where FEM meshes were constructed on top of microstructural images.
C1 [Lawson, John W.; Squire, Thomas H.] NASA, Ames Res Ctr, Thermal Protect Mat Branch, Moffett Field, CA 94035 USA.
   [Daw, Murray S.] Clemson Univ, Dept Phys & Astron, Clemson, SC 29631 USA.
   [Bauschlicher, Charles W., Jr.] NASA, Ames Res Ctr, Entry Syst & Technol Div, Moffett Field, CA 94035 USA.
RP Lawson, JW (reprint author), NASA, Ames Res Ctr, Thermal Protect Mat Branch, Mail Stop 234, Moffett Field, CA 94035 USA.
EM john.w.lawson@nasa.gov
FU NASA
FX M.S.D. was supported under a NASA prime contract to ELORET Corporation.
   We benefited from discussions with Pawel Keblinski and Tapan Desai.
NR 24
TC 2
Z9 2
U1 3
U2 52
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0002-7820
J9 J AM CERAM SOC
JI J. Am. Ceram. Soc.
PD DEC
PY 2012
VL 95
IS 12
BP 3971
EP 3978
DI 10.1111/jace.12037
PG 8
WC Materials Science, Ceramics
SC Materials Science
GA 051RT
UT WOS:000312145600045
ER

PT J
AU Christiansen, JL
   Jenkins, JM
   Caldwell, DA
   Burke, CJ
   Tenenbaum, P
   Seader, S
   Thompson, SE
   Barclay, TS
   Clarke, BD
   Li, J
   Smith, JC
   Stumpe, MC
   Twicken, JD
   Van Cleve, J
AF Christiansen, Jessie L.
   Jenkins, Jon M.
   Caldwell, Douglas A.
   Burke, Christopher J.
   Tenenbaum, Peter
   Seader, Shawn
   Thompson, Susan E.
   Barclay, Thomas S.
   Clarke, Bruce D.
   Li, Jie
   Smith, Jeffrey C.
   Stumpe, Martin C.
   Twicken, Joseph D.
   Van Cleve, Jeffrey
TI The Derivation, Properties, and Value of Kepler's Combined Differential
   Photometric Precision
SO PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC
LA English
DT Article
ID PLANETS; STARS; STELLAR
AB The Kepler Mission is searching for Earth-size planets orbiting solar-like stars by simultaneously observing > 160, 000 stars to detect sequences of transit events in the photometric light curves. The Combined Differential Photometric Precision (CDPP) is the metric that defines the ease with which these weak terrestrial transit signatures can be detected. An understanding of CDPP is invaluable for evaluating the completeness of the Kepler survey and inferring the underlying planet population. This paper describes how the Kepler CDPP is calculated, and introduces tables of rms CDPP on a per-target basis for 3-, 6-, and 12-hr transit durations, which are now available for all Kepler observations. Quarter 3 is the first typical set of observations at the nominal length and completeness for a quarter, from 2009 September 18 to 2009 December 16, and we examine the properties of the rms CDPP distribution for this data set. Finally, we describe how to employ CDPP to calculate target completeness, an important use case.
C1 [Christiansen, Jessie L.; Jenkins, Jon M.; Caldwell, Douglas A.; Burke, Christopher J.; Tenenbaum, Peter; Seader, Shawn; Thompson, Susan E.; Barclay, Thomas S.; Clarke, Bruce D.; Li, Jie; Smith, Jeffrey C.; Stumpe, Martin C.; Twicken, Joseph D.; Van Cleve, Jeffrey] NASA, Ames Res Ctr, SETI Inst, Moffett Field, CA 94035 USA.
RP Christiansen, JL (reprint author), NASA, Ames Res Ctr, SETI Inst, M-S 244-30, Moffett Field, CA 94035 USA.
EM jessie.l.christiansen@nasa.gov
RI Caldwell, Douglas/L-7911-2014; 
OI Caldwell, Douglas/0000-0003-1963-9616; Barclay,
   Thomas/0000-0001-7139-2724
FU NASA's Science Mission Directorate; Association of Universities for
   Research in Astronomy, Inc., under NASA [NAS5-26555]; NASA Office of
   Space Science [NNX09AF08G]
FX Funding for the Kepler Discovery Mission is provided by NASA's Science
   Mission Directorate. We thank the thousands of people whose efforts made
   Kepler's grand voyage of discovery possible. Some/all of the data
   presented in this article were obtained from the Mikulski Archive for
   Space Telescopes (MAST). STScI is operated by the Association of
   Universities for Research in Astronomy, Inc., under NASA contract
   NAS5-26555. Support for MAST for non-HST data is provided by the NASA
   Office of Space Science via grant NNX09AF08G and by other grants and
   contracts.
NR 26
TC 58
Z9 58
U1 0
U2 0
PU UNIV CHICAGO PRESS
PI CHICAGO
PA 1427 E 60TH ST, CHICAGO, IL 60637-2954 USA
SN 0004-6280
J9 PUBL ASTRON SOC PAC
JI Publ. Astron. Soc. Pac.
PD DEC
PY 2012
VL 124
IS 922
BP 1279
EP 1287
DI 10.1086/668847
PG 9
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 054ZQ
UT WOS:000312384800006
ER

PT J
AU Williams, JG
   Efroimsky, M
AF Williams, James G.
   Efroimsky, Michael
TI Bodily tides near the 1:1 spin-orbit resonance: correction to
   Goldreich's dynamical model
SO CELESTIAL MECHANICS & DYNAMICAL ASTRONOMY
LA English
DT Article
DE Bodily tides; Land tides; Moon; Libration; Spin-orbit resonance;
   Planetary satellites
ID TIDAL DISSIPATION; MERCURYS CAPTURE; EVOLUTION; SATELLITES; FRICTION;
   EXOPLANETS; PLANETS; STATES; CORE
AB Spin-orbit coupling is often described in an approach known as "the MacDonald torque", which has long become the textbook standard due to its apparent simplicity. Within this method, a concise expression for the additional tidal potential, derived by MacDonald (Rev Geophys 2:467-541, 1994), is combined with a convenient assumption that the quality factor Q is frequency-independent (or, equivalently, that the geometric lag angle is constant in time). This makes the treatment unphysical because MacDonald's derivation of the said formula was, very implicitly, based on keeping the time lag frequency-independent, which is equivalent to setting Q scale as the inverse tidal frequency. This contradiction requires the entire MacDonald treatment of both non-resonant and resonant rotation to be rewritten. The non-resonant case was reconsidered by Efroimsky and Williams (Cel Mech Dyn Astron 104:257-289, 2009), in application to spin modes distant from the major commensurabilities. In the current paper, we continue this work by introducing the necessary alterations into the MacDonald-torque-based model of falling into a 1-to-1 resonance. (The original version of this model was offered by Goldreich (Astron J 71:1-7, 1996). Although the MacDonald torque, both in its original formulation and in its corrected version, is incompatible with realistic rheologies of minerals and mantles, it remains a useful toy model, which enables one to obtain, in some situations, qualitatively meaningful results without resorting to the more rigorous (and complicated) theory of Darwin and Kaula. We first address this simplified model in application to an oblate primary body, with tides raised on it by an orbiting zero-inclination secondary. (Here the role of the tidally-perturbed primary can be played by a satellite, the perturbing secondary being its host planet. A planet may as well be the perturbed primary, its host star acting as the tide-raising secondary). We then extend the model to a triaxial primary body experiencing both a tidal and a permanent-figure torque exerted by an orbiting secondary. We consider the effect of the triaxiality on both circulating and librating rotation near the synchronous state. Circulating rotation may evolve toward the libration region or toward a spin faster than synchronous (the so-called pseudosynchronous spin). Which behaviour depends on the orbit eccentricity, the triaxial figure of the primary, and the mass ratio of the secondary and primary bodies. The spin evolution will always stall for the oblate case. For libration with a small amplitude, expressions are derived for the libration frequency, damping rate, and average orientation. Importantly, the stability of pseudosynchronous spin hinges upon the dissipation model. Makarove and Efroimsky (Astrophys J, 2012) have found that a more realistic tidal dissipation model than the corrected MacDonald torque makes pseudosynchronous spin unstable. Besides, for a sufficiently large triaxiality, pseudosynchronism is impossible, no matter what dissipation model is used.
C1 [Efroimsky, Michael] USN Observ, Washington, DC 20392 USA.
   [Williams, James G.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
RP Efroimsky, M (reprint author), USN Observ, Washington, DC 20392 USA.
EM james.g.williams@jpl.nasa.gov; efroimsk@ima.umn.edu
OI Efroimsky, Michael/0000-0003-1249-9622
FU National Aeronautics and Space Administration
FX We are indebted to Sylvio Ferraz-Mello for numerous fruitful discussions
   on the theory of bodily tides and for referring us to the paper by
   Rodriguez et al. (2008). We also express our deep thanks to Anthony
   Dobrovolskis whose review of our manuscript was very comprehensive and
   extremely helpful. A portion of the research described in this paper was
   carried out at the Jet Propulsion Laboratory of the California Institute
   of Technology, under a contract with the National Aeronautics and Space
   Administration. Government sponsorship acknowledged.
NR 42
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U1 0
U2 7
PU SPRINGER
PI DORDRECHT
PA VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
SN 0923-2958
EI 1572-9478
J9 CELEST MECH DYN ASTR
JI Celest. Mech. Dyn. Astron.
PD DEC
PY 2012
VL 114
IS 4
BP 387
EP 414
DI 10.1007/s10569-012-9446-7
PG 28
WC Astronomy & Astrophysics; Mathematics, Interdisciplinary Applications
SC Astronomy & Astrophysics; Mathematics
GA 050RL
UT WOS:000312071600005
ER

PT J
AU Jiang, N
   Bruzzese, J
   Patton, R
   Sutton, J
   Yentsch, R
   Gaitonde, DV
   Lempert, WR
   Miller, JD
   Meyer, TR
   Parker, R
   Wadham, T
   Holden, M
   Danehy, PM
AF Jiang, N.
   Bruzzese, J.
   Patton, R.
   Sutton, J.
   Yentsch, R.
   Gaitonde, D. V.
   Lempert, W. R.
   Miller, J. D.
   Meyer, T. R.
   Parker, R.
   Wadham, T.
   Holden, M.
   Danehy, P. M.
TI NO PLIF imaging in the CUBRC 48-inch shock tunnel
SO EXPERIMENTS IN FLUIDS
LA English
DT Article
ID LASER-INDUCED FLUORESCENCE; HIGH-SPEED FLOW; NITRIC-OXIDE; EINSTEIN
   COEFFICIENTS; VELOCIMETRY; DIAGNOSTICS
AB Nitric oxide planar laser-induced fluorescence (NO PLIF) imaging is demonstrated at a 10-kHz repetition rate in the Calspan University at Buffalo Research Center's (CUBRC) 48-inch Mach 9 hypervelocity shock tunnel using a pulse burst laser-based high frame rate imaging system. Sequences of up to ten images are obtained internal to a supersonic combustor model, located within the shock tunnel, during a single similar to 10-millisecond duration run of the ground test facility. Comparison with a CFD simulation shows good overall qualitative agreement in the jet penetration and spreading observed with an average of forty individual PLIF images obtained during several facility runs.
C1 [Jiang, N.; Bruzzese, J.; Patton, R.; Sutton, J.; Yentsch, R.; Gaitonde, D. V.; Lempert, W. R.] Ohio State Univ, Dept Mech Engn, Columbus, OH 43201 USA.
   [Jiang, N.; Bruzzese, J.; Patton, R.; Sutton, J.; Yentsch, R.; Gaitonde, D. V.; Lempert, W. R.] Ohio State Univ, Dept Aerosp Engn, Columbus, OH 43201 USA.
   [Miller, J. D.; Meyer, T. R.] Iowa State Univ, Dept Mech Engn, Ames, IA 50011 USA.
   [Parker, R.; Wadham, T.; Holden, M.] CUBRC, Buffalo, NY 14225 USA.
   [Danehy, P. M.] NASA Langley Res Ctr, Hampton, VA 23681 USA.
RP Lempert, WR (reprint author), Ohio State Univ, Dept Mech Engn, Columbus, OH 43201 USA.
EM lempert.1@osu.edu
FU Air Force Office of Scientific Research; NASA [NNX10CE89P]
FX This work was supported by the Air Force Office of Scientific Research
   (John Schmisseur-program monitor) and a NASA Phase I Small Business
   Innovative Research grant (Contract No. NNX10CE89P) to Spectral
   Energies, Inc. The Air Force Research Laboratory (James Gord) is also
   acknowledged for its ongoing contributions to the development of the
   laser technology essential to this work. The simulations have been
   performed on Department of Defense High-Performance Computing
   Modernization Program machines at AFRL and ERDC.
NR 28
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Z9 8
U1 3
U2 28
PU SPRINGER
PI NEW YORK
PA 233 SPRING ST, NEW YORK, NY 10013 USA
SN 0723-4864
J9 EXP FLUIDS
JI Exp. Fluids
PD DEC
PY 2012
VL 53
IS 6
BP 1637
EP 1646
DI 10.1007/s00348-012-1381-6
PG 10
WC Engineering, Mechanical; Mechanics
SC Engineering; Mechanics
GA 050SQ
UT WOS:000312074700001
ER

PT J
AU Tian, HQ
   Lu, CQ
   Chen, GS
   Tao, B
   Pan, SF
   Del Grosso, SJ
   Xu, XF
   Bruhwiler, L
   Wofsy, SC
   Kort, EA
   Prior, SA
AF Tian, Hanqin
   Lu, Chaoqun
   Chen, Guangsheng
   Tao, Bo
   Pan, Shufen
   Del Grosso, Stephen J.
   Xu, Xiaofeng
   Bruhwiler, Lori
   Wofsy, Steven C.
   Kort, Eric A.
   Prior, Stephen A.
TI Contemporary and projected biogenic fluxes of methane and nitrous oxide
   in North American terrestrial ecosystems
SO FRONTIERS IN ECOLOGY AND THE ENVIRONMENT
LA English
DT Review
ID MULTIFACTOR ENVIRONMENTAL-CHANGES; UNITED-STATES; BIOGEOCHEMISTRY MODEL;
   TEMPORAL PATTERNS; CLIMATE-CHANGE; N2O EMISSIONS; CARBON; WETLANDS;
   BUDGET; CH4
AB Accurately estimating biogenic methane (CH4) and nitrous oxide (N2O) fluxes in terrestrial ecosystems is critical for resolving global budgets of these greenhouse gases (GHGs) and continuing to mitigate climate warming. Here, we assess contemporary biogenic CH4 and N2O budgets and probable climate-change-related impacts on CH4 and N2O emissions in terrestrial North America. Multi-approach estimations show that, during 1990-2010, biogenic CH4 emissions ranged from 0.159 to 0.502 petagrams of carbon dioxide (CO2) equivalents per year (Pg CO(2)eq yr(-1), where 1 Pg = 1 x 10(15) g) and N2O emissions ranged from 0.802 to 1.016 Pg CO(2)eq yr(-1), which offset 47-166% of terrestrial CO2 sequestration (0.915-2.040 Pg CO(2)eq yr(-1), as indicated elsewhere in this Special Issue). According to two future climate scenarios, CH4 and N2O emissions are projected to continue increasing by 137-151% and 157-227%, respectively, by the end of this century, as compared with levels during 2000-2010. Strategies to mitigate climate change must account for non-CO2 GHG emissions, given their substantial warming potentials. Front Ecol Environ 2012; 10(10): 528-536, doi:10.1890/120057
C1 [Tian, Hanqin; Lu, Chaoqun; Chen, Guangsheng; Tao, Bo; Pan, Shufen] Auburn Univ, Int Ctr Climate & Global Change Res, Auburn, AL 36849 USA.
   [Del Grosso, Stephen J.] ARS, Soil Plant Nutrient Res Unit, USDA, Ft Collins, CO USA.
   [Xu, Xiaofeng] Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37831 USA.
   [Bruhwiler, Lori] NOAA, Earth Syst Res Lab, Boulder, CO USA.
   [Wofsy, Steven C.] Harvard Univ, Dept Earth & Planetary Sci, Cambridge, MA 02138 USA.
   [Kort, Eric A.] CALTECH, Jet Prop Lab, Pasadena, CA USA.
   [Prior, Stephen A.] ARS, USDA, Natl Soil Dynam Lab, Auburn, AL USA.
RP Tian, HQ (reprint author), Auburn Univ, Int Ctr Climate & Global Change Res, Auburn, AL 36849 USA.
EM tianhan@auburn.edu
RI Kort, Eric/F-9942-2012; Tian, Hanqin/A-6484-2012; TAO, BO/I-4166-2014;
   Xu, Xiaofeng/B-2391-2008
OI Kort, Eric/0000-0003-4940-7541; Tian, Hanqin/0000-0002-1806-4091; Xu,
   Xiaofeng/0000-0002-6553-6514
FU US Department of Energy's National Institute for Climatic Change
   Research (NICCR) Program [DUKE-UN-07-SC-NICCR-1014]; National
   Aeronautics and Space Administration (NASA) [NNX10AU06G, NNX11AD47G];
   Alabama Agricultural Experiment Station (AAES) Hatch/Multistate Funding
   Program
FX This study was supported by the US Department of Energy's National
   Institute for Climatic Change Research (NICCR) Program
   (DUKE-UN-07-SC-NICCR-1014), the National Aeronautics and Space
   Administration (NASA) Atmospheric Chemistry Modeling and Analysis
   Program, the NASA Terrestrial Ecology Program, the NASA
   Interdisciplinary Science Program (NNX10AU06G, NNX11AD47G), and the
   Alabama Agricultural Experiment Station (AAES) Hatch/Multistate Funding
   Program. Portions of this work were performed at the Jet Propulsion
   Laboratory, California Institute of Technology, under contract with
   NASA. This study contributes to the North American Carbon Program (NACP)
   Non-CO<INF>2</INF> Greenhouse Gases Synthesis.
NR 49
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U1 5
U2 72
PU ECOLOGICAL SOC AMER
PI WASHINGTON
PA 1990 M STREET NW, STE 700, WASHINGTON, DC 20036 USA
SN 1540-9295
J9 FRONT ECOL ENVIRON
JI Front. Ecol. Environ.
PD DEC
PY 2012
VL 10
IS 10
SI SI
BP 528
EP 536
DI 10.1890/120057
PG 9
WC Ecology; Environmental Sciences
SC Environmental Sciences & Ecology
GA 049KT
UT WOS:000311982600004
ER

PT J
AU McCabe, GJ
   Ault, TR
   Cook, BI
   Betancourt, JL
   Schwartz, MD
AF McCabe, Gregory J.
   Ault, Toby R.
   Cook, Benjamin I.
   Betancourt, Julio L.
   Schwartz, Mark D.
TI Influences of the El Nino Southern Oscillation and the Pacific Decadal
   Oscillation on the timing of the North American spring
SO INTERNATIONAL JOURNAL OF CLIMATOLOGY
LA English
DT Article
DE spring; phenology; ENSO; PDO
ID WESTERN UNITED-STATES; ENSO TELECONNECTIONS; ATLANTIC OSCILLATION;
   CLIMATE INDEXES; VARIABILITY; PHENOLOGY; IMPACTS; WINTER; WEATHER;
   PRECIPITATION
AB Detrended, modelled first leaf dates for 856 sites across North America for the period 19002008 are used to examine how the El Nino Southern Oscillation (ENSO) and the Pacific Decadal Oscillation (PDO) separately and together might influence the timing of spring. Although spring (mean March through April) ENSO and PDO signals are apparent in first leaf dates, the signals are not statistically significant (at a 95% confidence level (p < 0.05)) for most sites. The most significant ENSO/PDO signal in first leaf dates occurs for El Nino and positive PDO conditions. An analysis of the spatial distributions of first leaf dates for separate and combined ENSO/PDO conditions features a northwestsoutheast dipole that is significantly (at p < 0.05) different than the distributions for neutral conditions. The nature of the teleconnection between Pacific SST's and first leaf dates is evident in comparable composites for detrended sea level pressure (SLP) in the spring months. During positive ENSO/PDO, there is an anomalous flow of warm air from the southwestern US into the northwestern US and an anomalous northeasterly flow of cold air from polar regions into the eastern and southeastern US. These flow patterns are reversed during negative ENSO/PDO. Although the magnitudes of first leaf date departures are not necessarily significantly related to ENSO and PDO, the spatial patterns of departures are significantly related to ENSO and PDO. These significant relations and the long-lived persistence of SSTs provide a potential tool for forecasting the tendencies for first leaf dates to be early or late. Copyright (c) 2011 Royal Meteorological Society
C1 [McCabe, Gregory J.] US Geol Survey, Denver Fed Ctr, Denver, CO 80225 USA.
   [Ault, Toby R.] Univ Arizona, Dept Geosci, Tucson, AZ 85721 USA.
   [Cook, Benjamin I.] NASA, Goddard Inst Space Studies, New York, NY 10025 USA.
   [Betancourt, Julio L.] US Geol Survey, Tucson, AZ USA.
   [Schwartz, Mark D.] Univ Wisconsin, Dept Geog, Milwaukee, WI 53201 USA.
RP McCabe, GJ (reprint author), US Geol Survey, Denver Fed Ctr, MS 412, Denver, CO 80225 USA.
EM gmccabe@usgs.gov
RI Cook, Benjamin/H-2265-2012
FU National Center for Ecological Analysis and Synthesis; NSF [EF-0553768];
   University of California, Santa Barbara; State of California;
   USA-National Phenology Network; Research Coordination Network grant from
   the National Science Foundation (NSF) [IOS-0639794]
FX This work was conducted as a part of the 'Forecasting Phenology:
   Integrating Ecology, Climatology, and Phylogeny to Understand Plant
   Responses to Climate Change' Working Group supported by the National
   Center for Ecological Analysis and Synthesis, which is funded by NSF
   (Grant #EF-0553768), the University of California, Santa Barbara, and
   the State of California. Additional support was also provided by the
   USA-National Phenology Network, supported by a Research Coordination
   Network grant from the National Science Foundation (NSF Grant
   IOS-0639794).
NR 44
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U1 5
U2 59
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0899-8418
J9 INT J CLIMATOL
JI Int. J. Climatol.
PD DEC
PY 2012
VL 32
IS 15
BP 2301
EP 2310
DI 10.1002/joc.3400
PG 10
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 050DU
UT WOS:000312033900004
ER

PT J
AU Gross, RS
   Schuh, H
   Huang, CL
AF Gross, Richard S.
   Schuh, Harald
   Huang, C. L.
TI Observing and Understanding Earth Rotation Preface
SO JOURNAL OF GEODYNAMICS
LA English
DT Editorial Material
C1 [Gross, Richard S.] CALTECH, Jet Prop Lab, Pasadena, CA 91125 USA.
   [Schuh, Harald] Vienna Univ Technol, A-1040 Vienna, Austria.
   [Huang, C. L.] Shanghai Astron Observ, Shanghai, Peoples R China.
RP Gross, RS (reprint author), CALTECH, Jet Prop Lab, Pasadena, CA 91125 USA.
EM Richard.S.Gross@jpl.nasa.gov
NR 0
TC 0
Z9 0
U1 1
U2 8
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0264-3707
J9 J GEODYN
JI J. Geodyn.
PD DEC
PY 2012
VL 62
SI SI
BP 1
EP 1
DI 10.1016/j.jog.2012.04.011
PG 1
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 052AK
UT WOS:000312169900001
ER

PT J
AU Nastula, J
   Gross, R
   Salstein, DA
AF Nastula, Jolanta
   Gross, Richard
   Salstein, David A.
TI Oceanic excitation of polar motion: Identification of specific oceanic
   areas important for polar motion excitation
SO JOURNAL OF GEODYNAMICS
LA English
DT Article
DE Oceanic excitation; Non-atmospheric excitation
ID ATMOSPHERIC ANGULAR-MOMENTUM; CHANDLER-WOBBLE; EARTH; VARIABILITY;
   MODELS
AB In this paper regional values of the oceanic excitation function of polar motion are computed from bottom pressure and oceanic current fields from the ECCO/JPL data-assimilating model kf080 for the period 1993-2009. The influence of different geographic regions of the ocean on the excitation of polar motion is determined by calculating correlations and covariances between these regional excitations and either the global non-atmospheric excitation or the global oceanic excitation. The non-atmospheric excitation is estimated by subtracting the atmospheric signal from the excitation computed from geodetic observations of polar motion; the global oceanic excitation function is equivalent to the sum of the oceanic excitation function computed in every grid point. Our attention focuses on the regional distribution of the oceanic polar motion excitation for two time scales: the seasonal spectral band and the band around the Chandler period. We identified the southern Indian Ocean and the South Pacific Ocean as important regions for non-atmospheric polar motion excitation. The maximum of variability over the southern Indian Ocean is especially important in the case of annual oscillation. The Atlantic Ocean makes less significant contribution to the non-atmospheric polar motion excitation than the Pacific and Indian Ocean in both considered spectral ranges. Inland seas like the Mediterranean and the Sea of Japan have high covariance with the global signals. (C) 2012 Elsevier Ltd. All rights reserved.
C1 [Nastula, Jolanta] Polish Acad Sci, Space Res Ctr, PL-01237 Warsaw, Poland.
   [Gross, Richard] CALTECH, Jet Prop Lab, Pasadena, CA USA.
   [Salstein, David A.] Atmospher & Environm Res Inc, Lexington, MA USA.
RP Nastula, J (reprint author), Polish Acad Sci, Space Res Ctr, Bartycka 18A, PL-01237 Warsaw, Poland.
EM nastula@cbk.waw.pl
FU National Science Centre [N526157040]; US National Science Foundation
   [ATM-0913780]
FX The research reported here was supported by the National Science Centre,
   through project N526157040. The work of RG described in this paper was
   performed at the Jet Propulsion Laboratory, California Institute of
   Technology, under contract with the National Aeronautics and Space
   Administration. DS is sponsored by the US National Science Foundation
   under grant ATM-0913780.
NR 31
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U1 2
U2 14
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0264-3707
J9 J GEODYN
JI J. Geodyn.
PD DEC
PY 2012
VL 62
SI SI
BP 16
EP 23
DI 10.1016/j.jog.2012.01.002
PG 8
WC Geochemistry & Geophysics
SC Geochemistry & Geophysics
GA 052AK
UT WOS:000312169900004
ER

PT J
AU Kacprzak, T
   Zuntz, J
   Rowe, B
   Bridle, S
   Refregier, A
   Amara, A
   Voigt, L
   Hirsch, M
AF Kacprzak, Tomasz
   Zuntz, Joe
   Rowe, Barnaby
   Bridle, Sarah
   Refregier, Alexandre
   Amara, Adam
   Voigt, Lisa
   Hirsch, Michael
TI Measurement and calibration of noise bias in weak lensing galaxy shape
   estimation
SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
LA English
DT Article
DE gravitational lensing: weak; methods: data analysis; methods:
   statistical; techniques: image processing; cosmology: observations
ID IMAGE-ANALYSIS COMPETITION; COSMIC SHEAR; GRAVITATIONAL SHEAR; GREAT08
   CHALLENGE; POLAR SHAPELETS; REQUIREMENTS; LIMITATIONS; GRADIENTS;
   REDSHIFT; IMPACT
AB Weak gravitational lensing has the potential to constrain cosmological parameters to high precision. However, as shown by the Shear Testing Programmes and Gravitational lensing Accuracy Testing challenges, measuring galaxy shears is a non-trivial task: various methods introduce different systematic biases which have to be accounted for. We investigate how pixel noise on the image affects the bias on shear estimates from a maximum likelihood forward model-fitting approach using a sum of co-elliptical Sersic profiles, in complement to the theoretical approach of an associated paper. We evaluate the bias using a simple but realistic galaxy model and find that the effects of noise alone can cause biases of the order of 1-10 per cent on measured shears, which is significant for current and future lensing surveys. We evaluate a simulation-based calibration method to create a bias model as a function of galaxy properties and observing conditions. This model is then used to correct the simulated measurements. We demonstrate that, for the simple case in which the correct range of galaxy models is used in the fit, the calibration method can reduce noise bias to the level required for estimating cosmic shear in upcoming lensing surveys.
C1 [Kacprzak, Tomasz; Zuntz, Joe; Rowe, Barnaby; Bridle, Sarah; Voigt, Lisa; Hirsch, Michael] UCL, Dept Phys & Astron, London WC1E 6BT, England.
   [Zuntz, Joe] Univ Oxford, Astrophys Grp, Oxford OX1 3RH, England.
   [Zuntz, Joe] Univ Oxford, Oxford Martin Sch, Oxford OX1 3BD, England.
   [Rowe, Barnaby] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
   [Rowe, Barnaby] CALTECH, Pasadena, CA 91125 USA.
   [Refregier, Alexandre; Amara, Adam] ETH, Inst Astron, CH-8093 Zurich, Switzerland.
   [Hirsch, Michael] Max Planck Inst Intelligent Syst, Dept Empir Inference, D-72076 Tubingen, Germany.
RP Kacprzak, T (reprint author), UCL, Dept Phys & Astron, Gower St, London WC1E 6BT, England.
EM tomasz.kacprzak.09@ucl.ac.uk
OI Rowe, Barnaby/0000-0002-7042-9174
FU European Research Council [240672]; NASA
FX TK, SB, MH, BR and JZ acknowledge support from the European Research
   Council in the form of a Starting Grant with number 240672. Part of BR's
   work was done at the Jet Propulsion Laboratory, California Institute of
   Technology, under contract with NASA. We thank Gary Bernstein for
   suggesting the calibration approach and for many fruitful discussions.
   We acknowledge the use of the UCL Legion High Performance Computing
   Facility, and associated support services, in the completion of this
   work. We thank Dugan Witherick for help with Legion Cluster. We also
   thank Mike Jarvis, Catherine Heymans, Cris Sabiu and Caroline Pung for
   helpful discussions.
NR 44
TC 40
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U1 0
U2 2
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0035-8711
J9 MON NOT R ASTRON SOC
JI Mon. Not. Roy. Astron. Soc.
PD DEC
PY 2012
VL 427
IS 4
BP 2711
EP 2722
DI 10.1111/j.1365-2966.2012.21622.x
PG 12
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 050ZI
UT WOS:000312093200002
ER

PT J
AU Hobbs, G
   Coles, W
   Manchester, RN
   Keith, MJ
   Shannon, RM
   Chen, D
   Bailes, M
   Bhat, NDR
   Burke-Spolaor, S
   Champion, D
   Chaudhary, A
   Hotan, A
   Khoo, J
   Kocz, J
   Levin, Y
   Oslowski, S
   Preisig, B
   Ravi, V
   Reynolds, JE
   Sarkissian, J
   van Straten, W
   Verbiest, JPW
   Yardley, D
   You, XP
AF Hobbs, G.
   Coles, W.
   Manchester, R. N.
   Keith, M. J.
   Shannon, R. M.
   Chen, D.
   Bailes, M.
   Bhat, N. D. R.
   Burke-Spolaor, S.
   Champion, D.
   Chaudhary, A.
   Hotan, A.
   Khoo, J.
   Kocz, J.
   Levin, Y.
   Oslowski, S.
   Preisig, B.
   Ravi, V.
   Reynolds, J. E.
   Sarkissian, J.
   van Straten, W.
   Verbiest, J. P. W.
   Yardley, D.
   You, X. P.
TI Development of a pulsar-based time-scale
SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
LA English
DT Article
DE time; pulsars: general
ID TIMING PACKAGE; ATOMIC TIME; TEMPO2; MASS
AB Using observations of pulsars from the Parkes Pulsar Timing Array (PPTA) project we develop the first pulsar-based time-scale that has a precision comparable to the uncertainties in International Atomic Time-scales (TAI). Our ensemble of pulsars provides an Ensemble Pulsar Scale (EPS) analogous to the free atomic time-scale Echelle Atomique Libre. The EPS can be used to detect fluctuations in atomic time-scales and therefore can lead to a new realization of Terrestrial Time, TT(PPTA11). We successfully follow features known to affect the frequency of the TAI, and we find marginally significant differences between TT(PPTA11) and TT(BIPM11). We discuss the various phenomena that lead to a correlated signal in the pulsar timing residuals and therefore limit the stability of the pulsar time-scale.
C1 [Hobbs, G.; Manchester, R. N.; Keith, M. J.; Shannon, R. M.; Chaudhary, A.; Hotan, A.; Khoo, J.; Oslowski, S.; Preisig, B.; Ravi, V.; Reynolds, J. E.; Sarkissian, J.; Yardley, D.] CSIRO Astron & Space Sci, Australia Telescope Natl Facil, Epping, NSW 1710, Australia.
   [Coles, W.] Univ Calif San Diego, La Jolla, CA 92093 USA.
   [Chen, D.] Chinese Acad Sci, Natl Space Sci Ctr, Beijing, Peoples R China.
   [Bailes, M.; Kocz, J.; Oslowski, S.; van Straten, W.] Swinburne Univ Technol, Ctr Astrophys & Supercomp, Hawthorn, Vic 3122, Australia.
   [Bhat, N. D. R.] Curtin Univ Technol, Int Ctr Radio Astron Res, Bentley, WA 6102, Australia.
   [Burke-Spolaor, S.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
   [Champion, D.; Verbiest, J. P. W.] Max Planck Inst Radioastron, D-53121 Bonn, Germany.
   [Levin, Y.] Monash Univ, Sch Phys, Clayton, Vic 3800, Australia.
   [Ravi, V.] Univ Melbourne, Sch Phys, Melbourne, Vic 3010, Australia.
   [Yardley, D.] Univ Sydney, Sch Phys A29, Sydney Inst Astron, Sydney, NSW 2006, Australia.
   [You, X. P.] Southwest Univ, Sch Phys Sci & Technol, Chongqing 400715, Peoples R China.
RP Hobbs, G (reprint author), CSIRO Astron & Space Sci, Australia Telescope Natl Facil, POB 76, Epping, NSW 1710, Australia.
EM george.hobbs@csiro.au
RI Bhat, Ramesh/B-7396-2013; 
OI Champion, David/0000-0003-1361-7723; Shannon, Ryan/0000-0002-7285-6348;
   Kocz, Jonathon/0000-0003-0249-7586; Oslowski, Stefan/0000-0003-0289-0732
FU Commonwealth of Australia; RNM's Australian Research Council (ARC)
   Federation Fellowship [FF0348478]; National Natural Science Foundation
   of China (NSFC) [10803006, 11010250]; Australian Research Council
   [DP0878388]; European Union under Marie-Curie Intra-European Fellowship
   [236394]
FX The Parkes radio telescope is part of the Australia Telescope which is
   funded by the Commonwealth of Australia for operation as a National
   Facility managed by CSIRO. The PPTA project was initiated with support
   from RNM's Australian Research Council (ARC) Federation Fellowship
   (FF0348478). GH acknowledges support from the National Natural Science
   Foundation of China (NSFC) #10803006 and #11010250 and the Australian
   Research Council #DP0878388. JPWV was supported by the European Union
   under Marie-Curie Intra-European Fellowship 236394. We thank the
   referee, Gerard Petit, for extremely useful comments on the paper.
NR 26
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PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0035-8711
J9 MON NOT R ASTRON SOC
JI Mon. Not. Roy. Astron. Soc.
PD DEC
PY 2012
VL 427
IS 4
BP 2780
EP 2787
DI 10.1111/j.1365-2966.2012.21946.x
PG 8
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 050ZI
UT WOS:000312093200007
ER

PT J
AU Enoto, T
   Nakagawa, YE
   Sakamoto, T
   Makishima, K
AF Enoto, T.
   Nakagawa, Y. E.
   Sakamoto, T.
   Makishima, K.
TI Spectral comparison of weak short bursts to the persistent X-rays from
   the magnetar 1E 1547.0-5408 in its 2009 outburst
SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
LA English
DT Article
DE stars: magnetars; pulsars: individual: 1E 1547.0-5408; pulsars:
   individual: SGRJ1550-5418; pulsars: individual: PSR J1550-5418; pulsars:
   individual: G327.24-013; ISM: supernova remnant
ID SOFT GAMMA REPEATER; HIGH-ENERGY EMISSION; SGR 0501+4516; NEUTRON-STARS;
   XTE J1810-197; PULSAR XTE-J1810-197; SUZAKU DISCOVERY; 4U 0142+61;
   SGR-1900+14; SGR-1806-20
AB In 2009 January, the 2.1-s anomalous X-ray pulsar 1E 1547.0-5408 evoked intense burst activity. A follow-up Suzaku observation on January 28 recorded enhanced persistent emission in both soft and hard X-rays. Through a reanalysis of the same Suzaku data, 18 short bursts were identified in the X-ray events recorded by the Hard X-ray Detector (HXD) and the X-ray Imaging Spectrometer (XIS). Their spectral peaks appear in the HXD-PIN band, and their 10-70 keV X-ray fluences range from similar to 2 x 10(-9) to 10(-7) erg cm(-2). Thus, the 18 events define a significantly weaker burst sample than has ever been obtained previously, similar to 10(-8)-10(-4) erg cm(-2). In the similar to 0.8 to similar to 300 keV band, the spectra of the three brightest bursts can be represented successfully by a two-blackbody model, or a few alternative models. A spectrum that is constructed by stacking 13 weaker short bursts with fluences in the range (0.2-2) x 10(-8) erg s(-1) is less curved, and its ratio to the persistent emission spectrum becomes constant at similar to 170 above similar to 8 keV. As a result, the two-blackbody model was able to reproduce the stacked weaker-burst spectrum only after adding a power-law model, for which the photon index is fixed at 1.54 as measured by the persistent spectrum. These results imply that there is a possibility that the spectrum composition that employs an optically thick component and a hard power-law component can describe the wide-band spectra of both the persistent and weak-burst emissions, despite the fact that their fluxes differ by two orders of magnitude. Based on the spectral similarity, we discuss a possible connection between the unresolved short bursts and the persistent emission.
C1 [Enoto, T.; Makishima, K.] Inst Phys & Chem Res RIKEN, High Energy Astrophys Lab, Wako, Saitama 3510198, Japan.
   [Enoto, T.; Sakamoto, T.] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA.
   [Nakagawa, Y. E.] Waseda Univ, Res Inst Sci & Engn, Shinjuku Ku, Tokyo 1620044, Japan.
   [Makishima, K.] Univ Tokyo, Dept Phys, Bunkyo Ku, Tokyo 1130033, Japan.
RP Enoto, T (reprint author), Inst Phys & Chem Res RIKEN, High Energy Astrophys Lab, Wako, Saitama 3510198, Japan.
EM teru.enoto@riken.jp
RI XRAY, SUZAKU/A-1808-2009
FU Japan Society for the Promotion of Science (JSPS)
FX We thank the members of the Suzaku magnetar Key Project and the Suzaku
   operation teams for the successful Target of Opportunity observation
   (ToO). TE is supported as a Research Fellow of the Japan Society for the
   Promotion of Science (JSPS).
NR 84
TC 10
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U1 0
U2 2
PU OXFORD UNIV PRESS
PI OXFORD
PA GREAT CLARENDON ST, OXFORD OX2 6DP, ENGLAND
SN 0035-8711
EI 1365-2966
J9 MON NOT R ASTRON SOC
JI Mon. Not. Roy. Astron. Soc.
PD DEC
PY 2012
VL 427
IS 4
BP 2824
EP 2840
DI 10.1111/j.1365-2966.2012.22086.x
PG 17
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 050ZI
UT WOS:000312093200011
ER

PT J
AU Umana, G
   Ingallinera, A
   Trigilio, C
   Buemi, CS
   Leto, P
   Agliozzo, C
   Noriega-Crespo, A
   Flagey, N
   Paladini, R
   Molinari, S
AF Umana, G.
   Ingallinera, A.
   Trigilio, C.
   Buemi, C. S.
   Leto, P.
   Agliozzo, C.
   Noriega-Crespo, A.
   Flagey, N.
   Paladini, R.
   Molinari, S.
TI Identifying Type IIn supernova progenitors in our Galaxy: the
   circumstellar environment of the Galactic luminous blue variable
   candidate Gal 026.47+0.02
SO MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
LA English
DT Article
DE stars: early-type; stars: individual: Gal 026.47+0.02; stars: winds,
   outflows; infrared: stars; continuum: stars
ID WIDE-ANGLE OUTFLOWS; MASSIVE STARS; CEPHEUS-E; SPITZER OBSERVATIONS;
   INFRARED SURVEY; HI-GAL; NEBULAE; RADIO; PLANE; DUST
AB New data from the Herschel Infrared Galactic Plane Survey (Hi-GAL) and the Expanded Very Large Array, together with ancillary multifrequency data from different archives, have provided a comprehensive picture of the circumstellar envelope (CSE) surrounding the Galactic luminous blue variable (LBV) candidate Gal 026.47+0.02. The high angular resolution of both the 70-mu m and 6-cm maps has allowed us to appreciate finest details of the nebula, whose morphology is consistent with a series of nested tori. The inner torus, which is close to the central object, is fully ionized, indicating events of aspherical mass loss.
   We have derived the physical properties of the CSE, including, in particular, one of the highest current-day mass losses from the central object and a very massive nebula, which consists of, at least, 17 M-circle dot of ionized gas, with 1.2-3.2 x 10(-2) M-circle dot in the form of dust. Altogether, the physical properties of Gal 026.47+0.02, including a very high stellar luminosity, point towards a very massive progenitor on the main sequence.
   According to the current models for Type IIn supernovae, the CSEs associated with possible progenitors have well constrained properties in both content and morphology. The derived physical characteristics of the nebula associated with Gal 026.47+0.02 actually satisfy all such requirements, providing some observational evidence of a direct link between a LBV and a possible Type IIn supernova.
C1 [Umana, G.; Trigilio, C.; Buemi, C. S.; Leto, P.; Agliozzo, C.] INAF Osservatorio Astrofis Catania, I-95123 Catania, Italy.
   [Ingallinera, A.] Univ Catania, Dipartimento Fis & Astron, I-95123 Catania, Italy.
   [Noriega-Crespo, A.] CALTECH, Ctr Infrared Proc & Anal, Pasadena, CA 91125 USA.
   [Flagey, N.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
   [Paladini, R.] CALTECH, NASA Herschel Sci Ctr, Pasadena, CA 91125 USA.
   [Molinari, S.] INAF Ist Astrofis & Planetol Spaziali, I-00133 Rome, Italy.
RP Umana, G (reprint author), INAF Osservatorio Astrofis Catania, Via S Sofia 78, I-95123 Catania, Italy.
EM gumana@oact.inaf.it
RI Molinari, Sergio/O-4095-2016; 
OI Molinari, Sergio/0000-0002-9826-7525; Buemi, Carla
   Simona/0000-0002-7288-4613; Leto, Paolo/0000-0003-4864-2806; Umana,
   Grazia/0000-0002-6972-8388
FU National Aeronautics and Space Administration; ASI [I/038/08/0 'HI-GAL']
FX We wish to thank an anonymous referee for suggestions that have helped
   to improve the paper. This publication makes use of data products from
   WISE, which is a joint project of the University of California, Los
   Angeles, and the Jet Propulsion Laboratory/California Institute of
   Technology, funded by the National Aeronautics and Space Administration.
   The Very Large Array of the National Radio Astronomy Observatory is a
   facility of the National Science Foundation, operated under cooperative
   agreement by Associated Universities, Inc. This research is supported by
   ASI contract I/038/08/0 'HI-GAL'.
NR 49
TC 3
Z9 3
U1 0
U2 2
PU WILEY-BLACKWELL
PI HOBOKEN
PA 111 RIVER ST, HOBOKEN 07030-5774, NJ USA
SN 0035-8711
J9 MON NOT R ASTRON SOC
JI Mon. Not. Roy. Astron. Soc.
PD DEC
PY 2012
VL 427
IS 4
BP 2975
EP 2984
DI 10.1111/j.1365-2966.2012.22018.x
PG 10
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 050ZI
UT WOS:000312093200023
ER

PT J
AU Suh, J
   Shaw, MD
   LeDuc, HG
   Weinstein, AJ
   Schwab, KC
AF Suh, J.
   Shaw, M. D.
   LeDuc, H. G.
   Weinstein, A. J.
   Schwab, K. C.
TI Thermally Induced Parametric Instability in a Back-Action Evading
   Measurement of a Micromechanical Quadrature near the Zero-Point Level
SO NANO LETTERS
LA English
DT Article
DE Back-action evasion; micromechanical resonator; superconducting
   resonator; parametric instability
ID OSCILLATOR; RESONATOR; MOTION; TEMPERATURES; METALS
AB We report the results of back-action evading experiments utilizing a tightly coupled electro-mechanical system formed by a radio frequency micromechanical resonator parametrically coupled to a NbTiN superconducting microwave resonator. Due to excess dissipation in the microwave resonator, we observe a parametric instability induced by a thermal shift of the mechanical resonance frequency. In light of these measurements, we discuss the constraints on microwave dissipation needed to perform BAE measurements far below the zero-point level.
C1 [Suh, J.; Shaw, M. D.; Weinstein, A. J.; Schwab, K. C.] CALTECH, Pasadena, CA 91125 USA.
   [Shaw, M. D.; LeDuc, H. G.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
RP Schwab, KC (reprint author), CALTECH, Pasadena, CA 91125 USA.
EM schwab@caltech.edu
OI Suh, Junho/0000-0002-0112-0499
FU DARPA [HR0011-10-1-0066]; National Science Foundation [NSF-DMR 1052647,
   NSF-IQIM 1125565]
FX We would like to acknowledge generous and essential support from DARPA
   (DARPA-QUANTUM HR0011-10-1-0066) and the National Science Foundation
   (NSF-DMR 1052647, NSF-IQIM 1125565). Fabrication was performed at the
   Microdevice Laboratory at JPL, and the Kavli Nanoscience Institute at
   Caltech.
NR 33
TC 18
Z9 18
U1 0
U2 10
PU AMER CHEMICAL SOC
PI WASHINGTON
PA 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
SN 1530-6984
J9 NANO LETT
JI Nano Lett.
PD DEC
PY 2012
VL 12
IS 12
BP 6260
EP 6265
DI 10.1021/nl303353r
PG 6
WC Chemistry, Multidisciplinary; Chemistry, Physical; Nanoscience &
   Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied;
   Physics, Condensed Matter
SC Chemistry; Science & Technology - Other Topics; Materials Science;
   Physics
GA 051JI
UT WOS:000312122100037
PM 23134089
ER

PT J
AU Topousis, DE
   Dennehy, CJ
   Lebsock, KL
AF Topousis, Daria E.
   Dennehy, Cornelius J.
   Lebsock, Kenneth L.
TI Nasa's Experiences Enabling the Capture and Sharing of Technical
   Expertise Through Communities of Practice
SO ACTA ASTRONAUTICA
LA English
DT Article
DE Communities of practice; Knowledge management; Autonomous rendezvous and
   docking; Fault management
AB Historically, engineers at the National Aeronautics and Space Administration (NASA) had few opportunities or incentives to share their technical expertise across the Agency. Its center- and project-focused culture often meant that knowledge never left organizational and geographic boundaries. The need to develop a knowledge sharing culture became critical as a result of increasingly complex missions, closeout of the Shuttle Program, and a new generation of engineers entering the workforce. To address this need, the Office of the Chief Engineer established communities of practice on the NASA Engineering Network. These communities were strategically aligned with NASA's core competencies in such disciplines as avionics, flight mechanics, life support, propulsion, structures, loads and dynamics, human factors, and guidance, navigation, and control. This paper is a case study of NASA's implementation of a system that would identify and develop communities, from establishing simple websites that compiled discipline-specific resources to fostering a knowledge-sharing environment through collaborative and interactive technologies. It includes qualitative evidence of improved availability and transfer of knowledge. It focuses on capabilities that increased knowledge exchange such as a custom-made Ask An Expert system, community contact lists, publication of key resources, and submission forms that allowed any user to propose content for the sites. It discusses the peer relationships that developed through the communities and the leadership and infrastructure that made them possible. (C) 2012 Elsevier Ltd. All rights reserved.
C1 [Topousis, Daria E.] CALTECH, Jet Prop Lab, Pasadena, CA 91125 USA.
   [Dennehy, Cornelius J.] NASA, Engn & Safety Ctr, Washington, DC USA.
   [Lebsock, Kenneth L.] Orbital Sci Tech Serv Div, Greenbelt, MD USA.
RP Topousis, DE (reprint author), CALTECH, Jet Prop Lab, Pasadena, CA 91125 USA.
EM daria.e.topousis@jpl.nasa.gov; cornelius.j.dennehy@nasa.gov;
   ken.lebsock@nasa.gov
NR 16
TC 1
Z9 1
U1 2
U2 21
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0094-5765
J9 ACTA ASTRONAUT
JI Acta Astronaut.
PD DEC
PY 2012
VL 81
IS 2
BP 499
EP 511
DI 10.1016/j.actaastro.2012.08.008
PG 13
WC Engineering, Aerospace
SC Engineering
GA 042JJ
UT WOS:000311467200012
ER

PT J
AU Cooper, MR
   Catauro, P
   Perchonok, M
AF Cooper, Maya R.
   Catauro, Patricia
   Perchonok, Michele
TI Development and evaluation of bioregenerative menus for Mars habitat
   missions
SO ACTA ASTRONAUTICA
LA English
DT Article
DE Mars; Menu; Space food system; Bioregenerative system
ID DURATION SPACEFLIGHT; LIFE-SUPPORT; FOOD SYSTEM; SPACE; STABILITY
AB Two 10-day menus were developed in preparation for a Mars habitat mission. The first was built on the assumption, as in previous menu development efforts for closed ecological systems, that the food system would be vegetarian, whereas the second menu introduced shelf-stable, prepackaged meat and entree items from the current International Space Station (ISS) food system. Both menus delivered an average of 3000 cal daily but the macronutrient proportions resulted in an excess of carbohydrates and dietary fiber per mission nutritional recommendations. Generally, the individual recipes comprising both menus were deemed acceptable by internal sensory panel (average overall acceptability=7.4). The incorporation of existing ISS entree items did not have a significant effect on the acceptability of the menus. In a final comparison, the food system upmass, or the amount of food that is shipped from the Earth, increased by 297 kg with the addition of prepackaged entrees to the menu. However, the addition of the shipped massed was counterbalanced by a 864 kg reduction in required crops. A further comparison of the crew time required for meal preparation and farming, food system power requirements, and food processing equipment mass is recommended to definitively distinguish the menus. (C) 2012 Elsevier Ltd. All rights reserved.
C1 [Perchonok, Michele] NASA, Lyndon B Johnson Space Ctr, Houston, TX 77058 USA.
   [Cooper, Maya R.; Catauro, Patricia] Lockheed Martin Explorat & Protect Solut, Houston, TX 77058 USA.
RP Perchonok, M (reprint author), NASA, Lyndon B Johnson Space Ctr, Mail Code SF4,2101 NASA Pkwy, Houston, TX 77058 USA.
EM maya.cooper@nasa.gov; michele.h.perchonok@nasa.gov
FU NASA Human Research Program; Space Human Factors and Habitability
   Element; Advanced Food Technology Project
FX This research was made possible with the tremendous support of various
   teams and individuals. We thank the NASA Human Research Program, the
   Space Human Factors and Habitability Element, and the Advanced Food
   Technology Project for support of this task. Additionally, we thank the
   entire Space Foods Systems Laboratory and interns Joseph Jones and
   Jennifer Griffin for their assistance in creating and evaluating the
   recipes in this study.
NR 27
TC 1
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U1 3
U2 19
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0094-5765
J9 ACTA ASTRONAUT
JI Acta Astronaut.
PD DEC
PY 2012
VL 81
IS 2
BP 555
EP 562
DI 10.1016/j.actaastro.2012.08.035
PG 8
WC Engineering, Aerospace
SC Engineering
GA 042JJ
UT WOS:000311467200017
ER

PT J
AU Sherwood, B
AF Sherwood, Brent
TI Decadal opportunities for space architects
SO ACTA ASTRONAUTICA
LA English
DT Article
DE Human space flight; Space exploration; Space passenger travel; Space
   resource utilization; Space industrialization; Space solar power; Space
   settlement; Space colonization; Space architecture; Habitation; Habitat;
   Crew; Passenger; Space development
AB A significant challenge for the new field of space architecture is the dearth of project opportunities. Yet every year more young professionals express interest to enter the field. This paper derives projections that bound the number, type, and range of global development opportunities that may be reasonably expected over the next few decades for human space flight (HSF) systems so those interested in the field can benchmark their goals. Four categories of HSF activity are described: human Exploration of solar system bodies; human Servicing of space-based assets; large-scale development of space Resources: and Breakout of self-sustaining human societies into the solar system. A progressive sequence of capabilities for each category starts with its earliest feasible missions and leads toward its full expression. The four sequences are compared in scale, distance from Earth, and readiness. Scenarios hybridize the most synergistic features from the four sequences for comparison to status quo, government-funded HSF program plans. Finally qualitative, decadal, order-of-magnitude estimates are derived for system development needs, and hence opportunities for space architects. Government investment towards human planetary exploration is the weakest generator of space architecture work. Conversely, the strongest generator is a combination of three market drivers: (1) commercial passenger travel in low Earth orbit; (2) in parallel, government extension of HSF capability to GEO; both followed by (3) scale-up demonstration of end-to-end solar power satellites in GEO. The rich end of this scale affords space architecture opportunities which are more diverse, complex, large-scale, and sociologically challenging than traditional exploration vehicle cabins and habitats. (C) 2012 Elsevier Ltd. All rights reserved.
C1 CALTECH, Jet Prop Lab, Pasadena, CA 91125 USA.
RP Sherwood, B (reprint author), CALTECH, Jet Prop Lab, Pasadena, CA 91125 USA.
EM brent.sherwood@jpl.nasa.gov
NR 6
TC 3
Z9 3
U1 1
U2 6
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0094-5765
J9 ACTA ASTRONAUT
JI Acta Astronaut.
PD DEC
PY 2012
VL 81
IS 2
BP 600
EP 609
DI 10.1016/j.actaastro.2012.07.021
PG 10
WC Engineering, Aerospace
SC Engineering
GA 042JJ
UT WOS:000311467200022
ER

PT J
AU Lee, YC
   Wenig, M
   Zhang, ZX
   Sugimoto, N
   Larko, D
   Diehl, T
AF Lee, Y. C.
   Wenig, Mark
   Zhang, Zhenxi
   Sugimoto, Nobuo
   Larko, Dave
   Diehl, Thomas
TI Dust episodes in Hong Kong (South China) and their relationship with the
   Sharav and Mongolian cyclones and jet streams
SO AIR QUALITY ATMOSPHERE AND HEALTH
LA English
DT Article
DE Hong Kong dust episode; Sahara dust outbreak; Sharav/Mongolian cyclones;
   Jet streams
ID SAHARAN DUST; TRANSPORT; WINTER; DEPOSITION; SATELLITE; EVENTS; SURGES;
   MODEL
AB The study presented in this paper analyses two dust episodes in Hong Kong, one occurring in March 2006 and the other on 22 March 2010. The latter is the worst dust episode on Hong Kong record. The focus is on the relationship between the dust episodes and the Sharav/Mongolian cyclones and jet streams. The 16 March 2006 episode is traceable to a continental-scale Saharan dust outbreak of 5-9 March 2006 caused by the cold front of an East Mediterranean Sharav cyclone arriving at north-west Africa on 5 March 2006. The eastward movement of the cyclone along the North African coast is clearly illustrated in the geopotential height contours. Simulations by the chemistry transport model GOCART provide a visible evidence of the transport as well as an estimate of contributions from the Sahara to the aerosol concentration levels in Hong Kong. The transport simulations suggest that the dust is injected to the polar jet north of the Caspian Sea, while it is transported eastward simultaneously by the more southerly subtropical jet. The major source of dust for Hong Kong is usually the Gobi desert. Despite the effect of remote sources, the 16 March 2006 dust episode was still mainly under the influence of the Mongolian cyclone cold fronts. In the recent episode of 22 March 2010, the influence of the Mongolian cyclone predominated as well. It appears that the concurrent influence of the Sharav and Mongolian cyclones on Hong Kong and East Asia is not a common occurrence. Besides transporting dusts from non-East Asian sources to Hong Kong and East Asia, the strong subtropical jet on 21 March 2010 (i.e. 1 day prior to the major dust episode) is believed to have strengthened an easterly monsoon surge to South China causing the transport of voluminous dusts to Taiwan and Hong Kong the following day.
C1 [Wenig, Mark; Zhang, Zhenxi] City Univ Hong Kong, Sch Energy & Environm, Hong Kong, Hong Kong, Peoples R China.
   [Lee, Y. C.] City Univ Hong Kong, Guy Carpenter Asia Pacific Climate Impact Ctr, Hong Kong, Hong Kong, Peoples R China.
   [Sugimoto, Nobuo] Natl Inst Environm Studies, Atmospher Remote Sensing Sect, Tsukuba, Ibaraki 3058506, Japan.
   [Larko, Dave] NASA, Goddard Space Flight Ctr, Atmospher Chem & Dynam Branch, Greenbelt, MD 20771 USA.
   [Diehl, Thomas] Univ Maryland Baltimore Cty, Baltimore, MD 21228 USA.
RP Wenig, M (reprint author), City Univ Hong Kong, Sch Energy & Environm, Hong Kong, Hong Kong, Peoples R China.
EM mark.wenig@cityu.edu.hk
RI Wenig, Mark/K-7279-2012; Sugimoto, Nobuo/C-5189-2015
OI Sugimoto, Nobuo/0000-0002-0545-1316
FU City University of Hong Kong [7002458]; Guy Carpenter Asia-Pacific
   Climate Impact Centre of the City University of Hong Kong
FX The work described in this paper was supported by a grant from City
   University of Hong Kong (project no. 7002458). Thanks are due to the Guy
   Carpenter Asia-Pacific Climate Impact Centre of the City University of
   Hong Kong for research grant support. The provision of air quality data
   by the Environmental Protection Department of the Hong Kong Special
   Administrative Region and the advice of Dr Roland Draxler of NOAA are
   gratefully acknowledged.
NR 30
TC 2
Z9 2
U1 3
U2 20
PU SPRINGER INTERNATIONAL PUBLISHING AG
PI CHAM
PA GEWERBESTRASSE 11, CHAM, CH-6330, SWITZERLAND
SN 1873-9318
J9 AIR QUAL ATMOS HLTH
JI Air Qual. Atmos. Health
PD DEC
PY 2012
VL 5
IS 4
BP 413
EP 424
DI 10.1007/s11869-011-0134-7
PG 12
WC Environmental Sciences
SC Environmental Sciences & Ecology
GA 042UB
UT WOS:000311495500006
ER

PT J
AU Riris, H
   Numata, K
   Li, S
   Wu, S
   Ramanathan, A
   Dawsey, M
   Mao, JP
   Kawa, R
   Abshire, JB
AF Riris, Haris
   Numata, Kenji
   Li, Steve
   Wu, Stewart
   Ramanathan, Anand
   Dawsey, Martha
   Mao, Jianping
   Kawa, Randolph
   Abshire, James B.
TI Airborne measurements of atmospheric methane column abundance using a
   pulsed integrated-path differential absorption lidar
SO APPLIED OPTICS
LA English
DT Article
ID CARBON-DIOXIDE; NITROUS-OXIDE; CO2; SPACE; SPECTROSCOPY; SYSTEM; GOSAT;
   CH4; SENSITIVITY; SATELLITE
AB We report airborne measurements of the column abundance of atmospheric methane made over an altitude range of 3-11 km using a direct detection integrated-path differential-absorption lidar with a pulsed laser emitting at 1651 nm. The laser transmitter was a tunable, seeded optical parametric amplifier pumped by a Nd:YAG laser, and the receiver used a photomultiplier detector and photon-counting electronics. The results follow the expected changes with aircraft altitude, and the measured line shapes and optical depths show good agreement with theoretical calculations. (C) 2012 Optical Society of America
C1 [Riris, Haris; Dawsey, Martha; Kawa, Randolph; Abshire, James B.] NASA, Goddard Space Flight Ctr, Sci & Explorat Directorate, Greenbelt, MD 20771 USA.
   [Numata, Kenji] Univ Maryland, Dept Astron, College Pk, MD 20742 USA.
   [Li, Steve; Wu, Stewart] NASA, Goddard Space Flight Ctr, Lasers & Electopt Branch, Greenbelt, MD 20771 USA.
   [Ramanathan, Anand] Oak Ridge Associated Univ, Oak Ridge, TN 37831 USA.
   [Mao, Jianping] NASA, Goddard Space Flight Ctr, Goddard Earth Sci Technol & Res, Greenbelt, MD 20771 USA.
RP Riris, H (reprint author), NASA, Goddard Space Flight Ctr, Sci & Explorat Directorate, Greenbelt, MD 20771 USA.
EM haris.riris@nasa.gov
RI Riris, Haris/D-1004-2013; Kawa, Stephan/E-9040-2012; Abshire,
   James/I-2800-2013; 
OI Ramanathan, Anand/0000-0002-1865-0904
FU NASA Astrobiology Technology Instrument Development program
FX This research was funded by the NASA Astrobiology Technology Instrument
   Development program. We would like to thank Dr. Michael New for his
   support throughout the program. We would also like to thank the Earth
   Science Technology Office (ESTO), and the Instrument Incubation Program,
   and the Goddard CO<INF>2</INF> Sounder team for their equipment loan and
   for their assistance.
NR 54
TC 15
Z9 15
U1 4
U2 39
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 1559-128X
EI 2155-3165
J9 APPL OPTICS
JI Appl. Optics
PD DEC 1
PY 2012
VL 51
IS 34
BP 8296
EP 8305
DI 10.1364/AO.51.008296
PG 10
WC Optics
SC Optics
GA 048DC
UT WOS:000311889400029
PM 23207402
ER

PT J
AU Le, PVV
   Kumar, P
   Drewry, DT
   Quijano, JC
AF Le, Phong V. V.
   Kumar, Praveen
   Drewry, Darren T.
   Quijano, Juan C.
TI A graphical user interface for numerical modeling of acclimation
   responses of vegetation to climate change
SO COMPUTERS & GEOSCIENCES
LA English
DT Article
DE Modeling; Multilayer canopy; MATLAB; Ecohydrology; Vegetation
ID LEAF-AREA INDEX; BIOENERGY CROPS; UNITED-STATES; CARBON; WATER;
   SWITCHGRASS; ENERGY; MISCANTHUS; ATMOSPHERE; TURBULENCE
AB Ecophysiological models that vertically resolve vegetation canopy states are becoming a powerful tool for studying the exchange of mass, energy, and momentum between the land surface and the atmosphere. A mechanistic multilayer canopy-soil-root system model (MLCan) developed by Drewry et al. (2010a) has been used to capture the emergent vegetation responses to elevated atmospheric CO2 for both C-3 and C-4 plants under various climate conditions. However, processing input data and setting up such a model can be time-consuming and error-prone. In this paper, a graphical user interface that has been developed for MLCan is presented. The design of this interface aims to provide visualization capabilities and interactive support for processing input meteorological forcing data and vegetation parameter values to facilitate the use of this model. In addition, the interface also provides graphical tools for analyzing the forcing data and simulated numerical results. The model and its interface are both written in the MATLAB programming language. Finally, an application of this model package for capturing the ecohydrological responses of three bioenergy crops (maize, miscanthus, and switchgrass) to local environmental drivers at two different sites in the Midwestern United States is presented. (C) 2012 Elsevier Ltd. All rights reserved.
C1 [Le, Phong V. V.; Kumar, Praveen; Quijano, Juan C.] Univ Illinois, Dept Civil & Environm Engn, Urbana, IL 61801 USA.
   [Drewry, Darren T.] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
   [Kumar, Praveen] Univ Illinois, Dept Atmospher Sci, Urbana, IL 61801 USA.
RP Kumar, P (reprint author), Univ Illinois, Dept Civil & Environm Engn, Urbana, IL 61801 USA.
EM kumar1@illinois.edu
RI Kumar, Praveen/D-2036-2010
OI Kumar, Praveen/0000-0002-4787-0308
FU Vietnam Education Foundation (VEF); National Science Foundation (NSF)
   [ATM 06-28687, EAR 09-11205]; National Science Foundation International
   Research Fellowship Program (IRFP) [OISE-0900556]; Jet Propulsion
   Laboratory; California Institute of Technology; National Aeronautics and
   Space Administration
FX This work was supported by Vietnam Education Foundation (VEF) and
   National Science Foundation (NSF) Grant ATM 06-28687 and EAR 09-11205.
   D.T.D. was also supported by the National Science Foundation
   International Research Fellowship Program (IRFP), award OISE-0900556.
   D.T.D. also acknowledges support of the Jet Propulsion Laboratory,
   California Institute of Technology, under a contract with the National
   Aeronautics and Space Administration,
NR 27
TC 6
Z9 6
U1 1
U2 15
PU PERGAMON-ELSEVIER SCIENCE LTD
PI OXFORD
PA THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
SN 0098-3004
J9 COMPUT GEOSCI-UK
JI Comput. Geosci.
PD DEC
PY 2012
VL 49
BP 91
EP 101
DI 10.1016/j.cageo.2012.07.007
PG 11
WC Computer Science, Interdisciplinary Applications; Geosciences,
   Multidisciplinary
SC Computer Science; Geology
GA 044WQ
UT WOS:000311656300011
ER

PT J
AU Weng, FZ
   Zou, XL
   Turk, FJ
AF Weng, Fuzhong
   Zou, Xiaolei
   Turk, F. Joseph
TI Introduction to the Special Issue on the Chinese FengYun-3 Satellite
   Instrument Calibration and Applications
SO IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
LA English
DT Editorial Material
C1 [Weng, Fuzhong] NOAA, Natl Environm Satellite Data & Informat Serv, Ctr Satellite Applicat & Res, Washington, DC 20233 USA.
   [Zou, Xiaolei] Florida State Univ, Dept Earth Ocean Atmospher Sci, Tallahassee, FL 32306 USA.
   [Turk, F. Joseph] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
RP Weng, FZ (reprint author), NOAA, Natl Environm Satellite Data & Informat Serv, Ctr Satellite Applicat & Res, Washington, DC 20233 USA.
RI Weng, Fuzhong/F-5633-2010
OI Weng, Fuzhong/0000-0003-0150-2179
NR 0
TC 0
Z9 0
U1 0
U2 11
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0196-2892
J9 IEEE T GEOSCI REMOTE
JI IEEE Trans. Geosci. Remote Sensing
PD DEC
PY 2012
VL 50
IS 12
SI SI
BP 4843
EP 4844
DI 10.1109/TGRS.2012.2227591
PG 2
WC Geochemistry & Geophysics; Engineering, Electrical & Electronic; Remote
   Sensing; Imaging Science & Photographic Technology
SC Geochemistry & Geophysics; Engineering; Remote Sensing; Imaging Science
   & Photographic Technology
GA 046UY
UT WOS:000311791100001
ER

PT J
AU Lall, P
   Lowe, R
   Goebel, K
AF Lall, Pradeep
   Lowe, Ryan
   Goebel, Kai
TI Extended Kalman Filter Models and Resistance Spectroscopy for
   Prognostication and Health Monitoring of Leadfree Electronics Under
   Vibration
SO IEEE TRANSACTIONS ON RELIABILITY
LA English
DT Article
DE Extended Kalman filter; lead-free solder reliability; prognostic health
   management (PHM); remaining useful life; vibration
ID FAILURE-ENVELOPE APPROACH; SOLDER-JOINT RELIABILITY; FINE-PITCH BGAS;
   THERMOMECHANICAL LOADS; FEATURE-EXTRACTION; DROP-IMPACT; DAMAGE
   INITIATION; MECHANICAL-SHOCK; SURVIVABILITY; PROGRESSION
AB A technique has been developed for monitoring the structural damage accrued in ball grid array interconnects during operation in vibration environments. The technique uses resistance spectroscopy based state space vectors, rate of change of the state variable, and acceleration of the state variable in conjunction with extended Kalman filter, and is intended for the pre-failure time-history of the component. Condition monitoring using the presented technique can provide knowledge of impending failure in high reliability applications where the risks associated with loss-of-functionality are too high to bear. The methodology has been demonstrated on 96.5%Sn3.0%Ag0.5%Cu (SAC305) lead-free area-array electronic assemblies subjected to vibration. The future state of the system has been estimated based on a second order extended Kalman filter model and a Bayesian Framework. The measured state variable has been related to the underlying interconnect damage using plastic strain. Performance of the prognostication health management algorithm during the vibration test has been quantified using performance evaluation metrics. Model predictions have been correlated with experimental data. The presented approach is applicable to functional systems where corner interconnects in area-array packages may be often redundant. Prognostic metrics including alpha-lambda metric, beta, and relative accuracy have been used to assess the performance of the damage proxies. The presented approach enables the estimation of residual life based on level of risk averseness.
C1 [Lall, Pradeep; Lowe, Ryan] Auburn Univ, Dept Mech Engn, NSF Ctr Adv Vehicle & Extreme Environm Elect CAVE, Auburn, AL 36849 USA.
   [Goebel, Kai] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
RP Lall, P (reprint author), Auburn Univ, Dept Mech Engn, NSF Ctr Adv Vehicle & Extreme Environm Elect CAVE, Auburn, AL 36849 USA.
EM lall@eng.auburn.edu
FU NASA-IVHM Program from National Aeronautics and Space Administration
   [NNA08BA21C]
FX The research presented in this paper has been supported by NASA-IVHM
   Program Grant NNA08BA21C from the National Aeronautics and Space
   Administration. Associate Editor: Q. Miao.
NR 71
TC 26
Z9 26
U1 3
U2 38
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9529
J9 IEEE T RELIAB
JI IEEE Trans. Reliab.
PD DEC
PY 2012
VL 61
IS 4
BP 858
EP 871
DI 10.1109/TR.2012.2220698
PG 14
WC Computer Science, Hardware & Architecture; Computer Science, Software
   Engineering; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA 047MB
UT WOS:000311843900003
ER

PT J
AU Lall, P
   Gupta, P
   Goebel, K
AF Lall, Pradeep
   Gupta, Prashant
   Goebel, Kai
TI Decorrelated Feature Space and Neural Nets Based Framework for Failure
   Modes Clustering in Electronics Subjected to Mechanical Shock
SO IEEE TRANSACTIONS ON RELIABILITY
LA English
DT Article
DE Fault isolation; feature vectors; perceptron; prognostics health
   monitoring; supervised learning
ID TIME-FREQUENCY-DISTRIBUTIONS; STATISTICAL PATTERN-RECOGNITION;
   FINE-PITCH BGAS; DROP-IMPACT; RELIABILITY; CLASSIFICATION; NETWORKS;
   PERSPECTIVE; PREDICTION; CSPS
AB Electronic systems under extreme shock and vibration environments may sustain several failure modes simultaneously. Previous experience indicates that the dominant failure modes experienced by packages in a drop and shock framework are in the solder interconnects including cracks at the package and the board interface, pad cratering, copper trace fatigue, and bulk-failure in the solder joint. In this paper, a method has been presented for failure mode classification using a combination of Karhunen Loeve transform with parity-based stepwise supervised training of a perceptrons. New is the early classification of multiple failure modes in the pre-failure space using supervised neural networks in conjunction with a Karhunen Loeve transform. The feature space has been formed by joint time frequency analysis. Because the cumulative damage may be accrued under repetitive loading with exposure to multiple shock events, the area array assemblies have been exposed to shock and feature vectors constructed to track damage initiation and progression. The error back propagation learning algorithm has been used for stepwise parity of each particular failure mode. The classified failure modes and failure regions belonging to each particular failure mode in the feature space are also validated by simulation of the designed neural network used for parity of feature space. Statistical similarity and validation of different classified dominant failure modes is performed by multivariate analysis of variance and Hotelling's T-square. The results of different classified dominant failure modes are also correlated with the experimental cross sections of the failed test assemblies. The methodology adopted in this paper can perform real-time fault monitoring with identification of a specific dominant failure mode, and is scalable to system level reliability.
C1 [Lall, Pradeep; Gupta, Prashant] Auburn Univ, Dept Mech Engn, NSF Ctr Adv Vehicle & Extreme Environm Elect CAVE, Auburn, AL 36849 USA.
   [Goebel, Kai] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
RP Lall, P (reprint author), Auburn Univ, Dept Mech Engn, NSF Ctr Adv Vehicle & Extreme Environm Elect CAVE, Auburn, AL 36849 USA.
EM lall@eng.auburn.edu
FU NASA-IVHM Program from the National Aeronautics and Space Administration
   [NNA08BA21C]
FX This work was supported by NASA-IVHM Program Grant NNA08BA21C from the
   National Aeronautics and Space Administration. Associate Editor: Q.
   Miao.
NR 57
TC 4
Z9 5
U1 0
U2 11
PU IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
PI PISCATAWAY
PA 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
SN 0018-9529
EI 1558-1721
J9 IEEE T RELIAB
JI IEEE Trans. Reliab.
PD DEC
PY 2012
VL 61
IS 4
BP 884
EP 900
DI 10.1109/TR.2012.2222611
PG 17
WC Computer Science, Hardware & Architecture; Computer Science, Software
   Engineering; Engineering, Electrical & Electronic
SC Computer Science; Engineering
GA 047MB
UT WOS:000311843900005
ER

PT J
AU Feng, Z
   Dong, XQ
   Xi, BK
   McFarlane, SA
   Kennedy, A
   Lin, B
   Minnis, P
AF Feng, Zhe
   Dong, Xiquan
   Xi, Baike
   McFarlane, Sally A.
   Kennedy, Aaron
   Lin, Bing
   Minnis, Patrick
TI Life cycle of midlatitude deep convective systems in a Lagrangian
   framework
SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
LA English
DT Article
ID TRMM PRECIPITATION RADAR; WESTERN PACIFIC; CLOUD CLUSTERS; ANVIL CLOUDS;
   SATELLITE; COMPLEXES; EVOLUTION; MONSOON; FLORIDA; CELLS
AB Deep convective systems (DCSs) consist of intense convective cores (CC), large stratiform rain (SR) regions, and extensive nonprecipitating anvil clouds (AC). This study focuses on the evolution of these three components and the factors that affect system lifetime and AC production. An automated satellite tracking method is used in conjunction with a recently developed multisensor hybrid classification to analyze the evolution of DCS structure in a Lagrangian framework over the central United States. Composite analysis from 4221 tracked DCSs during two warm seasons (May-August, 2010-2011) shows that maximum system size correlates with lifetime, and longer-lived DCSs have more extensive SR and AC. For short to medium systems (lifetimes <6 h), the lifetime is mainly attributed to the intensity of the initial convection. Systems that last longer than 6 h are associated with up to 50% higher midtropospheric relative humidity and up to 40% stronger middle to upper tropospheric wind shear. Such environments allow continuous growth of detrained hydrometeors by deposition, supporting further development of the SR and AC region, as indicated by the increased staggered timing between stratiform clouds and peak convective intensity, thus prolonging the system lifetime beyond 6 h. Regression analysis shows that the areal coverage of thick AC is strongly correlated with the size of CC, updraft strength, and SR area. Ambient upper tropospheric wind speed and wind shear also play an important role for convective AC production, where for systems with large AC (radius >120 km) they are 24% and 20% higher, respectively, than those with small AC (radius = 20 km).
C1 [Feng, Zhe; McFarlane, Sally A.] Pacific NW Natl Lab, Richland, WA 99352 USA.
   [Feng, Zhe; Dong, Xiquan; Xi, Baike; Kennedy, Aaron] Univ N Dakota, Dept Atmospher Sci, Grand Forks, ND 58201 USA.
   [Lin, Bing; Minnis, Patrick] NASA, Langley Res Ctr, Hampton, VA 23665 USA.
RP Feng, Z (reprint author), Pacific NW Natl Lab, POB 999,MS K9-24, Richland, WA 99352 USA.
EM zhe.feng@pnnl.gov
RI Feng, Zhe/D-9531-2013; Feng, Zhe/E-1877-2015; Minnis,
   Patrick/G-1902-2010; 
OI Feng, Zhe/0000-0002-7540-9017; Minnis, Patrick/0000-0002-4733-6148;
   Dong, Xiquan/0000-0002-3359-6117
FU NOAA GOES-R project; DOE Atmospheric System Research (ASR) project
   [DE-SC0008468]; NASA CERES project [NNX10AI05G]; NASA EPSCoR CAN
   [NNX11AM15A]; DOE ASR program
FX The authors thank Samson Hagos for his comments and suggestions. This
   research was primarily supported by the NOAA GOES-R project managed by
   Ingrid Guch and Mark DeMaria. The University of North Dakota authors
   were also supported by the DOE Atmospheric System Research (ASR) project
   under grant DE-SC0008468, the NASA CERES project under grant NNX10AI05G,
   and NASA EPSCoR CAN under grant NNX11AM15A. The PNNL authors were
   supported by the DOE ASR program. The NASA Langley authors were
   supported by both the CERES and ASR programs.
NR 43
TC 19
Z9 19
U1 6
U2 11
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-897X
J9 J GEOPHYS RES-ATMOS
JI J. Geophys. Res.-Atmos.
PD DEC 1
PY 2012
VL 117
AR D23201
DI 10.1029/2012JD018362
PG 14
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 047ML
UT WOS:000311844900004
ER

PT J
AU Thompson, AM
   Miller, SK
   Tilmes, S
   Kollonige, DW
   Witte, JC
   Oltmans, SJ
   Johnson, BJ
   Fujiwara, M
   Schmidlin, FJ
   Coetzee, GJR
   Komala, N
   Maata, M
   Mohamad, MB
   Nguyo, J
   Mutai, C
   Ogino, SY
   Da Silva, FR
   Leme, NMP
   Posny, F
   Scheele, R
   Selkirk, HB
   Shiotani, M
   Stubi, R
   Levrat, G
   Calpini, B
   Thouret, V
   Tsuruta, H
   Canossa, JV
   Vomel, H
   Yonemura, S
   Diaz, JA
   Thanh, NTT
   Ha, HTT
AF Thompson, Anne M.
   Miller, Sonya K.
   Tilmes, Simone
   Kollonige, Debra W.
   Witte, Jacquelyn C.
   Oltmans, Samuel J.
   Johnson, Bryan J.
   Fujiwara, Masatomo
   Schmidlin, F. J.
   Coetzee, G. J. R.
   Komala, Ninong
   Maata, Matakite
   Mohamad, Maznorizan Bt
   Nguyo, J.
   Mutai, C.
   Ogino, S-Y.
   Da Silva, F. Raimundo
   Paes Leme, N. M.
   Posny, Francoise
   Scheele, Rinus
   Selkirk, Henry B.
   Shiotani, Masato
   Stuebi, Rene
   Levrat, Gilbert
   Calpini, Bertrand
   Thouret, Valerie
   Tsuruta, Haruo
   Valverde Canossa, Jessica
   Voemel, Holger
   Yonemura, S.
   Andres Diaz, Jorge
   Thanh, Nguyen T. Tan
   Ha, Hoang T. Thuy
TI Southern Hemisphere Additional Ozonesondes (SHADOZ) ozone climatology
   (2005-2009): Tropospheric and tropical tropopause layer (TTL) profiles
   with comparisons to OMI-based ozone products
SO JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
LA English
DT Article
ID INDIAN-OCEAN; VERTICAL-DISTRIBUTION; NORTHERN-HEMISPHERE; STRATOSPHERIC
   OZONE; SEASONAL-VARIATIONS; CONVECTIVE OUTFLOW; FIELD OBSERVATIONS; DEEP
   CONVECTION; REUNION ISLAND; SATELLITE DATA
AB We present a regional and seasonal climatology of SHADOZ ozone profiles in the troposphere and tropical tropopause layer (TTL) based on measurements taken during the first five years of Aura, 2005-2009, when new stations joined the network at Hanoi, Vietnam; Hilo, Hawaii; Alajuela/Heredia, Costa Rica; Cotonou, Benin. In all, 15 stations operated during that period. A west-to-east progression of decreasing convective influence and increasing pollution leads to distinct tropospheric ozone profiles in three regions: (1) western Pacific/eastern Indian Ocean; (2) equatorial Americas (San Cristobal, Alajuela, Paramaribo); (3) Atlantic and Africa. Comparisons in total ozone column from soundings, the Ozone Monitoring Instrument (OMI, on Aura, 2004-) satellite and ground-based instrumentation are presented. Most stations show better agreement with OMI than they did for EP/TOMS comparisons (1998-2004; Earth-Probe/Total Ozone Mapping Spectrometer), partly due to a revised above-burst ozone climatology. Possible station biases in the stratospheric segment of the ozone measurement noted in the first 7 years of SHADOZ ozone profiles are re-examined. High stratospheric bias observed during the TOMS period appears to persist at one station. Comparisons of SHADOZ tropospheric ozone and the daily Trajectory-enhanced Tropospheric Ozone Residual (TTOR) product (based on OMI/MLS) show that the satellite-derived column amount averages 25% low. Correlations between TTOR and the SHADOZ sondes are quite good (typical r(2) = 0.5-0.8), however, which may account for why some published residual-based OMI products capture tropospheric interannual variability fairly realistically. On the other hand, no clear explanations emerge for why TTOR-sonde discrepancies vary over a wide range at most SHADOZ sites.
C1 [Thompson, Anne M.; Miller, Sonya K.; Kollonige, Debra W.] Penn State Univ, Dept Meteorol, University Pk, PA 16802 USA.
   [Tilmes, Simone] NCAR, Div Atmospher Chem, Boulder, CO USA.
   [Witte, Jacquelyn C.] SSAI, Lanham, MD USA.
   [Witte, Jacquelyn C.] NASA Goddard Space Flight Ctr, Greenbelt, MD USA.
   [Oltmans, Samuel J.; Johnson, Bryan J.] NOAA ESRL, Global Monitoring Div, Boulder, CO USA.
   [Oltmans, Samuel J.] Univ Colorado, CIRES, Boulder, CO 80309 USA.
   [Fujiwara, Masatomo] Hokkaido Univ, Fac Environm Earth Sci, Sapporo, Hokkaido, Japan.
   [Schmidlin, F. J.] NASA Wallops Flight Facil, Wallops Isl, VA USA.
   [Coetzee, G. J. R.] S Africa Weather Serv, Pretoria, South Africa.
   [Komala, Ninong] Natl Inst Aeronaut & Space, Bandung, Indonesia.
   [Maata, Matakite] Univ S Pacific, Sch Biol & Chem Sci, Div Chem, Suva, Fiji.
   [Mohamad, Maznorizan Bt] Minist Sci Technol & Innovat, Malaysian Meteorol Dept, Petaling Jaya, Malaysia.
   [Nguyo, J.; Mutai, C.] Kenya Meteorol Dept, Nairobi, Kenya.
   [Ogino, S-Y.] Japan Agcy Marine Earth Sci & Technol, Monsoon Hydrol Cycle Res Team, Trop Climate Variat Res Program, Res Inst Global Change, Yokosuka, Kanagawa 2370061, Japan.
   [Ogino, S-Y.] Kobe Univ, Grad Sch Sci, Kobe, Hyogo 657, Japan.
   [Da Silva, F. Raimundo; Paes Leme, N. M.] INPE, Sao Jose Dos Campos, Brazil.
   [Posny, Francoise] Univ Reunion, St Denis, France.
   [Scheele, Rinus] Royal Netherlands Meteorol Inst, NL-3730 AE De Bilt, Netherlands.
   [Selkirk, Henry B.] Univ Space Res Assoc, Columbia, MD USA.
   [Shiotani, Masato] Kyoto Univ, Res Inst Sustainable Humanosphere, Kyoto, Japan.
   [Stuebi, Rene; Levrat, Gilbert; Calpini, Bertrand] Fed Off Meteorol & Climatol, MeteoSwiss Aerol Stn, Payerne, Switzerland.
   [Thouret, Valerie] Univ Toulouse, CNRS, Lab Aerol, Toulouse, France.
   [Tsuruta, Haruo] Univ Tokyo, Atmosphere & Ocean Res Inst, Div Climate Syst Res, Kashiwa, Chiba, Japan.
   [Valverde Canossa, Jessica] Univ Nacl, Dept Environm Sci, Heredia, Costa Rica.
   [Voemel, Holger] Deutsch Wetterdienst, GRUAN Lead Ctr, Lindenberg, Germany.
   [Yonemura, S.] Natl Inst Agroenvironm Sci, Tsukuba, Ibaraki 305, Japan.
   [Andres Diaz, Jorge] Univ Costa Rica, Gas Sensing Lab, CICANUM, Sch Phys, San Jose, Costa Rica.
   [Thanh, Nguyen T. Tan; Ha, Hoang T. Thuy] Minist Nat Resources & Environm, Aerometeorol Observ, Natl Hydrometeorol Serv, Hanoi, Vietnam.
RP Thompson, AM (reprint author), Penn State Univ, Dept Meteorol, 503 Walker Bldg, University Pk, PA 16802 USA.
EM amt16@psu.edu
RI Tsuruta, Haruo/M-7657-2014; Thompson, Anne /C-3649-2014
OI Thompson, Anne /0000-0002-7829-0920
FU SHADOZ [NNG05GP22G, NNX09AJ23G, NNG05G062G]; NOAA's Global Monitoring
   Division
FX This study was performed while A.M.T. was on a Fulbright Scholar grant
   to South Africa for 8 months in 2010-2011, with extraordinary support
   and hospitality from Northwest University-Potchefstroom (J. J. Pienaar
   and his group), the CSIR-Pretoria (V. Sivakumar), the University of the
   Witwatersrand Climatology Research Group (S. J. Piketh) and SHADOZ Co-I
   G. J. R. Coetzee (South African Weather Service). Helpful comments on
   the manuscript were received from H. G. J. Smit (FZ-Julich), N. V.
   Balashov (PSU), J.-L. Baray (Universite de la Reunion) and an anonymous
   reviewer. The Upper Atmosphere Research Program of NASA (special thanks
   to M. J. Kurylo and K. W. Jucks) and Aura Validation have made SHADOZ
   possible (grants NNG05GP22G, NNX09AJ23G, and NNG05G062G). Support from
   NOAA's Global Monitoring Division and WMO for the intercomparison
   activities (M. Proffit, L. Barrie, and G. Braathen) are gratefully
   acknowledged. The authors also thank operators, local agencies and
   funding organizations in more than a dozen countries for their
   dedication to SHADOZ over the past 15 years.
NR 113
TC 21
Z9 22
U1 3
U2 42
PU AMER GEOPHYSICAL UNION
PI WASHINGTON
PA 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 USA
SN 2169-897X
EI 2169-8996
J9 J GEOPHYS RES-ATMOS
JI J. Geophys. Res.-Atmos.
PD DEC 1
PY 2012
VL 117
AR D23301
DI 10.1029/2011JD016911
PG 27
WC Meteorology & Atmospheric Sciences
SC Meteorology & Atmospheric Sciences
GA 047ML
UT WOS:000311844900001
ER

PT J
AU Holland, PR
   Kwok, R
AF Holland, Paul R.
   Kwok, Ron
TI Wind-driven trends in Antarctic sea-ice drift
SO NATURE GEOSCIENCE
LA English
DT Article
ID SOUTHERN-OCEAN; ROSS SEA; MOTION; VARIABILITY; IMAGERY; CYCLE
AB The sea-ice cover around Antarctica has experienced a slight expansion in area over the past decades(1,2). This small overall increase is the sum of much larger opposing trends in different sectors that have been proposed to result from changes in atmospheric temperature or wind stress(3-5), precipitation(6,7), ocean temperature(8), and atmosphere or ocean feedbacks(9,10). However, climate models have failed to reproduce the overall increase in sea ice(11). Here we present a data set of satellite-tracked sea-ice motion for the period of 1992-2010 that reveals large and statistically significant trends in Antarctic ice drift, which, in most sectors, can be linked to local winds. We quantify dynamic and thermodynamic processes in the internal ice pack and show that wind-driven changes in ice advection are the dominant driver of ice-concentration trends around much of West Antarctica, whereas wind-driven thermodynamic changes dominate elsewhere. The ice-drift trends also imply large changes in the surface stress that drives the Antarctic ocean gyres, and in the fluxes of heat and salt responsible for the production of Antarctic bottom and intermediate waters.
C1 [Holland, Paul R.] British Antarctic Survey, Cambridge CB3 0ET, England.
   [Kwok, Ron] CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA.
RP Holland, PR (reprint author), British Antarctic Survey, Cambridge CB3 0ET, England.
EM p.holland@bas.ac.uk
RI Holland, Paul/G-2796-2012; Kwok, Ron/A-9762-2008
OI Kwok, Ron/0000-0003-4051-5896
NR 30
TC 143
Z9 147
U1 7
U2 112
PU NATURE PUBLISHING GROUP
PI NEW YORK
PA 75 VARICK ST, 9TH FLR, NEW YORK, NY 10013-1917 USA
SN 1752-0894
J9 NAT GEOSCI
JI Nat. Geosci.
PD DEC
PY 2012
VL 5
IS 12
BP 872
EP 875
DI 10.1038/NGEO1627
PG 4
WC Geosciences, Multidisciplinary
SC Geology
GA 047JH
UT WOS:000311835800018
ER

PT J
AU Le, T
   Schowalter, SJ
   Rellergert, W
   Jeet, J
   Lin, GP
   Yu, N
   Hudson, ER
AF Thanh Le
   Schowalter, Steven J.
   Rellergert, Wade
   Jeet, Justin
   Lin, Guoping
   Yu, Nan
   Hudson, Eric R.
TI Low-threshold ultraviolet solid-state laser based on a Ce3+:LiCaAlF6
   crystal resonator
SO OPTICS LETTERS
LA English
DT Article
AB A low-threshold solid-state UV laser using a whispering gallery mode (WGM) resonator constructed from UV transparent crystalline material is demonstrated. Using a Ce3+:LiCaAlF6 resonator, we observe broad bandwidth lasing (280-330 nm) with a low threshold intensity of 7.5 x 10(9) W/m(2) and an effective slope efficiency of similar to 25%. The lasing time delay dynamics in the pulsed operation mode are also observed and analyzed. Additionally, a LiCaAlF6 WGM resonator with Q = 2 x 10(7) at 370 nm is realized. The combination of this high Q and the small WGM mode volume significantly lowers the pump power threshold compared to traditional cavity designs, opening the door for both tunable continuous-wave and mode-locked operation. (C) 2012 Optical Society of America
C1 [Thanh Le; Lin, Guoping; Yu, Nan] CALTECH, Jet Prop Lab, Pasadena, CA 91009 USA.
   [Schowalter, Steven J.; Rellergert, Wade; Jeet, Justin; Hudson, Eric R.] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA.
RP Yu, N (reprint author), CALTECH, Jet Prop Lab, Pasadena, CA 91009 USA.
EM nan.yu@jpl.nasa.gov
RI Lin, Guoping/I-3381-2015
OI Lin, Guoping/0000-0003-4007-1850
FU DARPA QuASAR program
FX Part of this work was performed at the Jet Propulsion Laboratory,
   California Institute of Technology, under a contract with NASA. UCLA
   also acknowledges support from the DARPA QuASAR program.
NR 18
TC 9
Z9 9
U1 0
U2 22
PU OPTICAL SOC AMER
PI WASHINGTON
PA 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA
SN 0146-9592
J9 OPT LETT
JI Opt. Lett.
PD DEC 1
PY 2012
VL 37
IS 23
BP 4961
EP 4963
PG 3
WC Optics
SC Optics
GA 048WM
UT WOS:000311943900052
PM 23202104
ER

PT J
AU Iwashita, Y
   Stoica, A
   Kurazume, R
AF Iwashita, Yumi
   Stoica, Adrian
   Kurazume, Ryo
TI Gait identification using shadow biometrics
SO PATTERN RECOGNITION LETTERS
LA English
DT Article
DE Shadow biometrics; Gait; Person identification; Spherical harmonics
ID ENERGY IMAGE; RECOGNITION; OBJECT
AB We propose a novel biometrics method based on shadows (shadow biometrics, SB) and introduce a SB-based person identification method for a vision-based surveillance system. Conventional biometric identification based on body movements, as is the case in gait recognition, uses cameras that provide a good view of entire human body. Aerial search and surveillance systems only see the human body from top view with a smaller cross-section and with less details than seen in side views, which is further aggravated by the lower resolution associated with this imagery. Shadows, i.e. body projections due to the Sun, or artificial lights at night, can offer body biometrics information that cannot be directly seen in body top view. In this paper we use SB for person identification, automatically extracting shadows in captured video images, and processing them to extract gait features, further analyzed by spherical harmonics. We demonstrate shadow-based person identification in experiments inside a building using artificial light and outside under the Sun. The introduced method using spherical harmonics outperforms methods based on Fourier transform, gait energy image, and active energy image. Furthermore, we show that the combination of body and shadow areas, as seen from an oblique camera on an upper floor of a building, has better performance than using body only or shadow only information. (c), 2012 Elsevier B.V. All rights reserved.
C1 [Iwashita, Yumi; Kurazume, Ryo] Kyushu Univ, Nishi Ku, Fukuoka 8190395, Japan.
   [Iwashita, Yumi; Stoica, Adrian] CALTECH, Jet Prop Lab, Pasadena, CA USA.
RP Iwashita, Y (reprint author), Kyushu Univ, Nishi Ku, 744 Motooka, Fukuoka 8190395, Japan.
EM yumi@ieee.org
OI Kurazume, Ryo/0000-0002-4219-7644
FU  [23500216]
FX This work was supported by Grant-in-Aid for Scientific Research(C)
   (23500216).
NR 25
TC 8
Z9 8
U1 0
U2 22
PU ELSEVIER SCIENCE BV
PI AMSTERDAM
PA PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
SN 0167-8655
J9 PATTERN RECOGN LETT
JI Pattern Recognit. Lett.
PD DEC 1
PY 2012
VL 33
IS 16
BP 2148
EP 2155
DI 10.1016/j.patrec.2012.07.022
PG 8
WC Computer Science, Artificial Intelligence
SC Computer Science
GA 039PW
UT WOS:000311260000012
ER

PT J
AU Horch, EP
   Howell, SB
   Everett, ME
   Ciardi, DR
AF Horch, Elliott P.
   Howell, Steve B.
   Everett, Mark E.
   Ciardi, David R.
TI OBSERVATIONS OF BINARY STARS WITH THE DIFFERENTIAL SPECKLE SURVEY
   INSTRUMENT. IV. OBSERVATIONS OF KEPLER, CoRoT, AND HIPPARCOS STARS FROM
   THE GEMINI NORTH TELESCOPE
SO ASTRONOMICAL JOURNAL
LA English
DT Article
DE astrometry; binaries: visual; techniques: high angular resolution;
   techniques: interferometric; techniques: photometric
ID PROPER-MOTION STARS; 40 SPECTROSCOPIC BINARIES; CD-ROM; WIYN TELESCOPE;
   ORBITS; CATALOG
AB We present the results of 71 speckle observations of binary and unresolved stars, most of which were observed with the DSSI speckle camera at the Gemini North Telescope in 2012 July. The main purpose of the run was to obtain diffraction-limited images of high-priority targets for the Kepler and CoRoT missions, but in addition, we observed a number of close binary stars where the resolution limit of Gemini was used to better determine orbital parameters and/or confirm results obtained at or below the diffraction limit of smaller telescopes. Five new binaries and one triple system were discovered, and first orbits are calculated for other two systems. Several systems are discussed in detail.
C1 [Horch, Elliott P.] So Connecticut State Univ, Dept Phys, New Haven, CT 06515 USA.
   [Howell, Steve B.] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
   [Everett, Mark E.] Natl Opt Astron Observ, Tucson, AZ 85719 USA.
   [Ciardi, David R.] CALTECH, Exoplanet Sci Inst, NASA, Pasadena, CA 91125 USA.
RP Horch, EP (reprint author), So Connecticut State Univ, Dept Phys, 501 Crescent St, New Haven, CT 06515 USA.
EM horche2@southernct.edu; steve.b.howell@nasa.gov; everett@noao.edu;
   ciardi@ipac.caltech.edu
OI Ciardi, David/0000-0002-5741-3047
FU Kepler Science Office at the NASA Ames Research Center; Kepler Science
   Office; NSF [AST-0908125]
FX We thank the Kepler Science Office located at the NASA Ames Research
   Center for providing partial financial support for the upgraded DSSI
   instrument. It is also a pleasure to thank Steve Hardash, Andy Adamson,
   Inger Jorgensen, and the entire summit crew for their excellent work in
   getting the instrument to the telescope and installing it. We appreciate
   the collaboration of Thierry Appourchaux in pointing out the potential
   importance of YSC 13 in the determination of stellar masses from Kepler
   data. This work was funded by the Kepler Science Office and NSF Grant
   AST-0908125. It made use of the Washington Double Star Catalog
   maintained at the U.S. Naval Observatory and the SIMBAD database,
   operated at CDS, Strasbourg, France.
NR 25
TC 29
Z9 30
U1 0
U2 2
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-6256
J9 ASTRON J
JI Astron. J.
PD DEC
PY 2012
VL 144
IS 6
AR 165
DI 10.1088/0004-6256/144/6/165
PG 10
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 038HI
UT WOS:000311165400008
ER

PT J
AU Megeath, ST
   Gutermuth, R
   Muzerolle, J
   Kryukova, E
   Flaherty, K
   Hora, JL
   Allen, LE
   Hartmann, L
   Myers, PC
   Pipher, JL
   Stauffer, J
   Young, ET
   Fazio, GG
AF Megeath, S. T.
   Gutermuth, R.
   Muzerolle, J.
   Kryukova, E.
   Flaherty, K.
   Hora, J. L.
   Allen, L. E.
   Hartmann, L.
   Myers, P. C.
   Pipher, J. L.
   Stauffer, J.
   Young, E. T.
   Fazio, G. G.
TI THE SPITZER SPACE TELESCOPE SURVEY OF THE ORION A AND B MOLECULAR
   CLOUDS. I. A CENSUS OF DUSTY YOUNG STELLAR OBJECTS AND A STUDY OF THEIR
   MID-INFRARED VARIABILITY
SO ASTRONOMICAL JOURNAL
LA English
DT Article
DE infrared: stars; ISM: individual objects (Orion A, Orion B); stars:
   formation; stars: variables: T Tauri, Herbig Ae/Be
ID MULTIBAND IMAGING PHOTOMETER; INFRARED ARRAY CAMERA; T-TAURI STARS;
   SPECTRAL ENERGY-DISTRIBUTIONS; MAIN-SEQUENCE STARS; NEBULA CLUSTER;
   CIRCUMSTELLAR DISKS; TRAPEZIUM CLUSTER; PROTOPLANETARY DISKS; ABSOLUTE
   CALIBRATION
AB We present a survey of the Orion A and B molecular clouds undertaken with the IRAC and MIPS instruments on board Spitzer. In total, five distinct fields were mapped, covering 9 deg(2) in five mid-IR bands spanning 3-24 mu m. The survey includes the Orion Nebula Cluster, the Lynds 1641, 1630, and 1622 dark clouds, and the NGC 2023, 2024, 2068, and 2071 nebulae. These data are merged with the Two Micron All Sky Survey point source catalog to generate a catalog of eight-band photometry. We identify 3479 dusty young stellar objects (YSOs) in the Orion molecular clouds by searching for point sources with mid-IR colors indicative of reprocessed light from dusty disks or infalling envelopes. The YSOs are subsequently classified on the basis of their mid-IR colors and their spatial distributions are presented. We classify 2991 of the YSOs as pre-main-sequence stars with disks and 488 as likely protostars. Most of the sources were observed with IRAC in two to three epochs over six months; we search for variability between the epochs by looking for correlated variability in the 3.6 and 4.5 mu m bands. We find that 50% of the dusty YSOs show variability. The variations are typically small (similar to 0.2 mag) with the protostars showing a higher incidence of variability and larger variations. The observed correlations between the 3.6, 4.5, 5.8, and 8 mu m variability suggests that we are observing variations in the heating of the inner disk due to changes in the accretion luminosity or rotating accretion hot spots.
C1 [Megeath, S. T.; Kryukova, E.] Univ Toledo, Dept Phys & Astron, Toledo, OH 43560 USA.
   [Gutermuth, R.] Univ Massachusetts, Dept Astron, Amherst, MA 01003 USA.
   [Muzerolle, J.] Space Telescope Sci Inst, Baltimore, MD 21218 USA.
   [Flaherty, K.] Univ Arizona, Steward Observ, Tucson, AZ 85721 USA.
   [Hora, J. L.; Myers, P. C.; Fazio, G. G.] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA.
   [Allen, L. E.] Natl Opt Astron Observ, Tucson, AZ 85719 USA.
   [Hartmann, L.] Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA.
   [Pipher, J. L.] Univ Rochester, Dept Phys & Astron, Rochester, NY 14627 USA.
   [Stauffer, J.] CALTECH, Spitzer Sci Ctr, Pasadena, CA 91125 USA.
   [Young, E. T.] NASA, SOFIA Univ Space Res Assoc, Ames Res Ctr, Moffett Field, CA 94035 USA.
RP Megeath, ST (reprint author), Univ Toledo, Dept Phys & Astron, Toledo, OH 43560 USA.
EM megeath@physics.utoledo.edu
OI Hora, Joseph/0000-0002-5599-4650
FU National Aeronautics and Space Administration [960541, 960785]; National
   Science Foundation
FX This publication makes use of data products from the Two Micron All Sky
   Survey, which is a joint project of the University of Massachusetts and
   the Infrared Processing and Analysis. Center/California Institute of
   Technology, funded by the National Aeronautics and Space Administration
   and the National Science Foundation. This work is based in part on
   observations made with the Spitzer Space Telescope, which is operated by
   the Jet Propulsion Laboratory, California Institute of Technology under
   a contract with NASA. This work received support through that provided
   to the IRAC and MIPS instruments by NASA through contracts 960541 and
   960785, respectively, issued by JPL. Support for this work was also
   provided by NASA through awards to STM and JLP issued by JPL/Caltech.
NR 85
TC 115
Z9 115
U1 0
U2 2
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 0004-6256
J9 ASTRON J
JI Astron. J.
PD DEC
PY 2012
VL 144
IS 6
AR 192
DI 10.1088/0004-6256/144/6/192
PG 27
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 038HI
UT WOS:000311165400035
ER

PT J
AU Buenzli, E
   Apai, D
   Morley, CV
   Flateau, D
   Showman, AP
   Burrows, A
   Marley, MS
   Lewis, NK
   Reid, IN
AF Buenzli, Esther
   Apai, Daniel
   Morley, Caroline V.
   Flateau, Davin
   Showman, Adam P.
   Burrows, Adam
   Marley, Mark S.
   Lewis, Nikole K.
   Reid, I. Neill
TI VERTICAL ATMOSPHERIC STRUCTURE IN A VARIABLE BROWN DWARF:
   PRESSURE-DEPENDENT PHASE SHIFTS IN SIMULTANEOUS HUBBLE SPACE
   TELESCOPE-SPITZER LIGHT CURVES
SO ASTROPHYSICAL JOURNAL LETTERS
LA English
DT Article
DE brown dwarfs; stars: atmospheres; stars: individual (2MASS
   J22282889-4310262); stars: variables: general
ID HR 8799 PLANETS; T-DWARFS; MU-M; ULTRACOOL DWARFS; CLOUDS; VARIABILITY;
   TRANSITION; SPECTROSCOPY; TEMPERATURE; GRAVITY
AB Heterogeneous clouds or temperature perturbations in rotating brown dwarfs produce variability in the observed flux. We report time-resolved simultaneous observations of the variable T6.5 brown dwarf 2MASSJ22282889-431026 over the wavelength ranges 1.1-1.7 mu m and broadband 4.5 mu m. Spectroscopic observations were taken with Wide Field Camera 3 on board the Hubble Space Telescope and photometry with the Spitzer Space Telescope. The object shows sinusoidal infrared variability with a period of 1.4 hr at most wavelengths with peak-to-peak amplitudes between 1.45% and 5.3% of the mean flux. While the light curve shapes are similar at all wavelengths, their phases differ from wavelength to wavelength with a maximum difference of more than half of a rotational period. We compare the spectra with atmospheric models of different cloud prescriptions, from which we determine the pressure levels probed at different wavelengths. We find that the phase lag increases with decreasing pressure level, or higher altitude. We discuss a number of plausible scenarios that could cause this trend of light curve phase with probed pressure level. These observations are the first to probe heterogeneity in an ultracool atmosphere in both horizontal and vertical directions, and thus are an ideal test case for realistic three-dimensional simulations of the atmospheric structure with clouds in brown dwarfs and extrasolar planets.
C1 [Buenzli, Esther; Apai, Daniel; Flateau, Davin] Univ Arizona, Dept Astron, Tucson, AZ 85721 USA.
   [Buenzli, Esther; Apai, Daniel; Flateau, Davin] Univ Arizona, Steward Observ, Tucson, AZ 85721 USA.
   [Apai, Daniel; Flateau, Davin; Showman, Adam P.; Lewis, Nikole K.] Univ Arizona, Dept Planetary Sci, Tucson, AZ 85721 USA.
   [Apai, Daniel; Flateau, Davin; Showman, Adam P.; Lewis, Nikole K.] Univ Arizona, Lunar & Planetary Lab, Tucson, AZ 85721 USA.
   [Morley, Caroline V.] Univ Calif Santa Cruz, Dept Astron & Astrophys, Santa Cruz, CA 95064 USA.
   [Burrows, Adam] Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA.
   [Marley, Mark S.] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA.
   [Lewis, Nikole K.] MIT, Dept Earth Atmospher & Planetary Sci, Cambridge, MA 02139 USA.
   [Reid, I. Neill] Space Telescope Sci Inst, Baltimore, MD 21218 USA.
RP Buenzli, E (reprint author), Univ Arizona, Dept Astron, Tucson, AZ 85721 USA.
EM ebuenzli@email.arizona.edu
RI Marley, Mark/I-4704-2013; 
OI Buenzli, Esther/0000-0003-3306-1486; Marley, Mark/0000-0002-5251-2943
FU NASA through a grant from the Space Telescope Science Institute [12314];
   Association of Universities for Research in Astronomy, Incorporated,
   under NASA [NAS5-26555]; NASA [1439915]
FX Support for Program number 12314 was provided by NASA through a grant
   from the Space Telescope Science Institute, which is operated by the
   Association of Universities for Research in Astronomy, Incorporated,
   under NASA contract NAS5-26555. This work is based on observations made
   with the Spitzer Space Telescope, which is operated by the Jet
   Propulsion Laboratory, California Institute of Technology under a
   contract with NASA. Support for this work was provided by NASA through
   award issued by JPL/Caltech (1439915).
NR 25
TC 48
Z9 48
U1 0
U2 8
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 2041-8205
J9 ASTROPHYS J LETT
JI Astrophys. J. Lett.
PD DEC 1
PY 2012
VL 760
IS 2
AR L31
DI 10.1088/2041-8205/760/2/L31
PG 6
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 037KM
UT WOS:000311103000012
ER

PT J
AU Currie, T
   Debes, J
   Rodigas, TJ
   Burrows, A
   Itoh, Y
   Fukagawa, M
   Kenyon, SJ
   Kuchner, M
   Matsumura, S
AF Currie, Thayne
   Debes, John
   Rodigas, Timothy J.
   Burrows, Adam
   Itoh, Yoichi
   Fukagawa, Misato
   Kenyon, Scott J.
   Kuchner, Marc
   Matsumura, Soko
TI DIRECT IMAGING CONFIRMATION AND CHARACTERIZATION OF A DUST-ENSHROUDED
   CANDIDATE EXOPLANET ORBITING FOMALHAUT
SO ASTROPHYSICAL JOURNAL LETTERS
LA English
DT Article
DE planetary systems; stars: individual: (Fomalhaut)
ID HR 8799 B; MU-M; PLANETARY SYSTEM; BROWN DWARFS; IMAGES; MASS;
   INCLINATION; TELESCOPE; COMPANION; MODELS
AB We present Subaru/IRCS J-band data for Fomalhaut and a (re) reduction of archival 2004-2006 HST/ACS data first presented by Kalas et al. We confirm the existence of a candidate exoplanet, Fomalhaut b, in both the 2004 and 2006 F606W data sets at a high signal-to-noise ratio. Additionally, we confirm the detection at F814W and present a new detection in F435W. Fomalhaut b's space motion may be consistent with it being in an apsidally aligned, non-debris ring-crossing orbit, although new astrometry is required for firmer conclusions. We cannot confirm that Fomalhaut b exhibits 0.7-0.8 mag variability cited as evidence for planet accretion or a semi-transient dust cloud. The new, combined optical spectral energy distribution and IR upper limits confirm that emission identifying Fomalhaut b originates from starlight scattered by small dust, but this dust is most likely associated with a massive body. The Subaru and IRAC/4.5 mu m upper limits imply M < 2 M-J, still consistent with the range of Fomalhaut b masses needed to sculpt the disk. Fomalhaut b is very plausibly "a planet identified from direct imaging" even if current images of it do not, strictly speaking, show thermal emission from a directly imaged planet.
C1 [Currie, Thayne] Univ Toronto, Dept Astron & Astrophys, Toronto, ON, Canada.
   [Currie, Thayne; Kuchner, Marc] NASA, Goddard Space Flight Ctr, Stellar & Exoplanets Lab, Greenbelt, MD 20771 USA.
   [Debes, John] Space Telescope Sci Inst, Baltimore, MD 21218 USA.
   [Rodigas, Timothy J.] Univ Arizona, Steward Observ, Tucson, AZ USA.
   [Burrows, Adam] Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA.
   [Itoh, Yoichi] Univ Hyogo, Nishi Harima Observ, Kobe, Hyogo 6500044, Japan.
   [Fukagawa, Misato] Osaka Univ, Dept Earth & Space Sci, Osaka, Japan.
   [Kenyon, Scott J.] Smithsonian Astrophys Observ, Cambridge, MA USA.
   [Matsumura, Soko] Univ Maryland, Dept Astron, College Pk, MD 20742 USA.
RP Currie, T (reprint author), Univ Toronto, Dept Astron & Astrophys, Toronto, ON, Canada.
EM currie@astro.utoronto.ca
OI Kenyon, Scott/0000-0003-0214-609X
NR 32
TC 51
Z9 51
U1 0
U2 4
PU IOP PUBLISHING LTD
PI BRISTOL
PA TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
SN 2041-8205
J9 ASTROPHYS J LETT
JI Astrophys. J. Lett.
PD DEC 1
PY 2012
VL 760
IS 2
AR L32
DI 10.1088/2041-8205/760/2/L32
PG 6
WC Astronomy & Astrophysics
SC Astronomy & Astrophysics
GA 037KM
UT WOS:000311103000013
ER

EF