HR: 0830h
AN: SA41B-0433    [PDF]
TI: Products Derived From GUVI Auroral Data and Comparisons With Ground-Based Results From Poker Flat and Ft. Yukon, AK
AU: * Strickland, D J
EM: dstrick@cpi.com
AF: Computational Physics, Inc., 8001 Braddock Rd, Springfield, VA 22151 United States
AU: Hecht, J H
EM: James.H.Hecht@aero.org
AF: Aerospace Corp., PO Box 92957, Los Angeles, CA 90009 United States
AU: Meier, R R
EM: meier@uap2.nrl.navy.mil
AF: Naval Research Laboratory, 4555 Overlook Ave, Washington, DC 20375 United States
AU: Conde, M
EM: mark.conde@gi.alaska.edu
AF: Geophysical Institute and Dept. of Physics, University of Alaska Fairbanks, Fairbanks, AK 99775 United States
AU: Christensen, A B
EM: Andrew.B.Christensen@aero.org
AF: Aerospace Corp., PO Box 92957, Los Angeles, CA 90009 United States
AU: Morrison, D
EM: Danny.Morrison@jhuapl.edu
AF: Applied Physics Laboratory, 11100 Johns Hopkins Rd, Laurel, MD 20723 United States
AB: The TIMED/GUVI experiment has been making routine auroral/airglow far ultraviolet measurements since January 2002. Routine auroral measurements at visible/near IR wavelengths from the ground sites identified in the title have also been made that offer the opportunity to compare derived data products when GUVI is making coincident observations. The products of interest are characteristic energy E$_{o}$ and energy flux Q of precipitating electrons along with a scaling factor f$_{O}$ of the atomic oxygen number density (referenced to a specific MSIS atmosphere) that addresses composition changes arising from auroral heating. Comparisons of these products will be presented as derived from TIMED/GUVI Earth-disk data (using the 135.6, LBH$_{S}$ and LBH$_{L}$ spectral channels) and coincident ground-based data recorded at Poker Flat and Ft. Yukon, AK (photometer zenith observations of OI 844.6 nm, OI 630.0 nm, N$_{2}$$^{+}$ 427.8 nm, and N$_{2}$ 1PG 871.0 nm). Primary attention will be directed to GUVI data from a single orbit on April 17 2002 that recorded significant aurora emission over Alaska and elsewhere. The above products from coincident measurements of the two observing systems are in reasonable agreement and show significant reductions in f$_{O}$ compared to undisturbed values. Similar comparisons will also be presented from other times during 2002 and 2003.
DE: 0310 Airglow and aurora
DE: 0355 Thermosphere--composition and chemistry
DE: 0358 Thermosphere--energy deposition
SC: SPA - Aeronomy [SA]
MN: 2003 Fall Meeting