Physics
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufmsa21a0344l&link_type=abstract
American Geophysical Union, Fall Meeting 2004, abstract #SA21A-0344
Physics
0310 Airglow And Aurora, 0340 Middle Atmosphere: Composition And Chemistry, 0342 Middle Atmosphere: Energy Deposition, 0355 Thermosphere: Composition And Chemistry
Scientific paper
On 22 and 23 November 1997, ultraviolet imagers and spectrographic imagers on the Midcourse Space Experiment (MSX) observed the aurora at sub-kilometer spatial resolution at wavelengths from 114 nm to 385 nm. At the same time, the Polar Ultraviolet Imager (UVI) observed the aurora at similar wavelengths, but at spatial resolutions two orders of magnitude larger. UVI measurements in certain far-UV bands are often used to determine auroral energy deposition, characteristic energy, and composition, but only on a gross spatial scale. For two polar passes in November, this paper compares key auroral radiances (130.4 nm, 135.6 nm, and the LBHS and LBHL bands) at high spatial resolution from MSX with those at low spatial resolution from UVI. As might be expected, the high resolution data exhibit considerably more structure than the low resolution data, both spatially and temporally. Degradation of the high spatial resolution radiances to low resolution will determine if the latter accurately can represent auroral energetics and composition.
Carbary J.
Liou Kan
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