HR: 0830h
AN: SA41B-0431    [PDF]
TI: Retrieval of thermospheric temperature and N2, O, and O2 concentrations from GUVI limb scans
AU: * Meier, R R
EM: meier@uap2.nrl.navy.mil
AF: E. O. Hulburt Center for Space Research Naval Research Laboratory, Code 7606, Washington, DC 20375 United States
AU: Strickland, D J
AF: Computational Physics, Inc., 8001 Braddock Rd., Suite 210, Springfield, VA 22151 United States
AU: Picone, J M
AF: E. O. Hulburt Center for Space Research Naval Research Laboratory, Code 7606, Washington, DC 20375 United States
AU: Christensen, A B
AF: The Aerospace Corporation, PO Box 92957, Los Angeles, CA 90009 United States
AU: Paxton, L J
AF: Johns Hopkins University Applied Physics Laboratory, 11100 Johns Hopkins Rd, Laurel, MD 20723 United States
AU: Morrison, D
AF: Johns Hopkins University Applied Physics Laboratory, 11100 Johns Hopkins Rd, Laurel, MD 20723 United States
AU: Kil, H
AF: Johns Hopkins University Applied Physics Laboratory, 11100 Johns Hopkins Rd, Laurel, MD 20723 United States
AU: Bishop, J
AF: E. O. Hulburt Center for Space Research Naval Research Laboratory, Code 7606, Washington, DC 20375 United States
AU: Drob, D
AF: E. O. Hulburt Center for Space Research Naval Research Laboratory, Code 7606, Washington, DC 20375 United States
AU: Craven, J D
AF: Geophysical Institute and Dept. of Physics, University of Alaska Fairbanks, Fairbanks, AK 99775 United States
AU: Crowley, G
AF: Southwest Research Institute, Space Physics Department, 6220 Culebra Rd, San Antonio, TX 78238 United States
AU: Walterscheid, R L
AF: The Aerospace Corporation, PO Box 92957, Los Angeles, CA 90009 United States
AU: Avery, S
AF: CIRES, 216 University of Colorado Boulder, Boulder, CO 80309 United States
AU: Meng, C I
AF: Johns Hopkins University Applied Physics Laboratory, 11100 Johns Hopkins Rd, Laurel, MD 20723 United States
AB: The atomic oxygen 135.6 nm and the molecular nitrogen LBHS (140 - 150 nm) channels of the Global Ultraviolet Imager (GUVI) investigation can be used to remotely sense the state of the thermosphere. Observation of these emissions on the Earth limb are inverted using discrete inverse theory to retrieve altitude profiles of the N2, O, and O2 concentrations and temperature. The O/N2 column concentrations so obtained are found to be in excellent agreement with those derived independently from downward viewing of the Earth disk by GUVI. Low O/N2 regions during geomagnetic storms are found to have elevated temperatures. These composition and temperature correlations are consistent with the view that low O/N2 originates at high latitudes due to upwelling caused by Joule and particle heating. The molecular rich air then moves equatorward at night and migrates into the day where it can be observed by GUVI before cooling. Examples of this behavior from several geomagnetic storms will be presented.
DE: 0310 Airglow and aurora
DE: 0355 Thermosphere--composition and chemistry
DE: 7549 Ultraviolet emissions
SC: SPA - Aeronomy [SA]
MN: 2003 Fall Meeting