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Andrew B. Christensen
Researcher at The Aerospace Corporation
Publications - 100
Citations - 3198
Andrew B. Christensen is an academic researcher from The Aerospace Corporation. The author has contributed to research in topics: Thermosphere & Ionosphere. The author has an hindex of 29, co-authored 99 publications receiving 2903 citations. Previous affiliations of Andrew B. Christensen include Northrop Grumman Corporation & Dixie State University.
Papers
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Journal ArticleDOI
Initial observations with the Global Ultraviolet Imager (GUVI) in the NASA TIMED satellite mission
Andrew B. Christensen,Larry J. Paxton,Susan K. Avery,John D. Craven,G. Crowley,David C. Humm,Hyosub Kil,R. R. Meier,C.-I. Meng,Daniel Morrison,B. Ogorzalek,Paul R. Straus,D. J. Strickland,R. M. Swenson,Richard L. Walterscheid,Brian C. Wolven,Yongliang Zhang +16 more
TL;DR: The Global Ultraviolet Imager (GUVI) was used by the NASA TIMED satellite to measure the spectral radiance of the Earth's far ultraviolet airglow in the spectral region from 120 to 180 nm using a cross-track scanning spectrometer design as discussed by the authors.
Proceedings ArticleDOI
Global ultraviolet imager (GUVI): measuring composition and energy inputs for the NASA Thermosphere Ionosphere Mesosphere Energetics and Dynamics (TIMED) mission
Larry J. Paxton,Andrew B. Christensen,David C. Humm,Bernard S. Ogorzalek,C. T. Pardoe,Daniel Morrison,M. Weiss,W. R. Crain,Patricia H. Lew,D. J. Mabry,John O. Goldsten,Stephen A. Gary,David F. Persons,Mark J. Harold,E. Brian Alvarez,Carl J. Ercol,D. J. Strickland,Ching-I. Meng +17 more
TL;DR: The Global Ultraviolet Imager (GUVI) on the NASA Thermosphere Ionosphere Mesosphere Energetics and Dynamics (TIMED) mission will determine the variability in thermospheric composition, and its response to auroral inputs as well as measuring those inputs as mentioned in this paper.
Journal ArticleDOI
Deducing composition and incident electron spectra from ground-based auroral optical measurements: Theory and model results
TL;DR: In this article, the problem of monitoring composition and the behavior of precipitating electron spectra in aurora using N2+ 4278 A (blue), O I 6300 A (red), OI 7774 A (narrow, e+O), and O I 8446 A (broad, e +O2) as observed from the ground was examined.
Journal ArticleDOI
Equion, an Equatorial Ionospheric Irregularity Experiment
F. A. Morse,B. C. Edgar,Harry C. Koons,C. J. Rice,W. J. Heikkila,J. H. Hoffman,Brian A. Tinsley,J. D. Winningham,Andrew B. Christensen,Ronald F. Woodman,J. Pomalaza,Nelson R. Teixeira +11 more
TL;DR: In this paper, a coordinated rocket and ground-based study was conducted to investigate Equatorial Spread-F irregularities and found that very high positive and negative electron density gradients are responsible for the enhanced radar echoes, and that Energetic particles are not part of the spread-F phenomena.
Journal ArticleDOI
Remote Sensing of Earth's Limb by TIMED/GUVI: Retrieval of thermospheric composition and temperature
R. R. Meier,J. M. Picone,Douglas P. Drob,J. Bishop,J. T. Emmert,Judith Lean,Andrew W. Stephan,D. J. Strickland,Andrew B. Christensen,Larry J. Paxton,Daniel Morrison,H. Kil,Brian C. Wolven,Thomas N. Woods,G. Crowley,Stephen Gibson +15 more
TL;DR: The Global Ultraviolet Imager (GUVI) onboard the Thermosphere-Ionosphere-Mesosphere Energetics and Dynamics (TIMED) satellite senses far ultraviolet emissions from O and N2 in the thermosphere.