Physics
Scientific paper
May 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agusm..sa41a02h&link_type=abstract
American Geophysical Union, Spring Meeting 2001, abstract #SA41A-02 INVITED
Physics
0310 Airglow And Aurora, 0355 Thermosphere--Composition And Chemistry
Scientific paper
Satellite remote sensing of the atmosphere is an excellant technique for detecting large scale phenomena affecting the atmosphere. However, because of the restricted spatial or temporal resolution this technique does not reveal small scale atmospheric processes. Ground-based or rocket-based remote sensing techniques complement satellite techniques by providing a more detailed view of the atmosphere in a restricted geographic region. Over the past fifteen years photometric techniques have been utilized in conjunction with electron transport models in order to measure the average energies of precipitating electrons and the changes in the atomic oxygen to molecular nitrogen ratio in the lower thermosphere at auroral zone latitudes. Here we review the basis for this technique and its application from the ground and from rockets at Poker Flat, Alaska and at Kangerlussuaq and Narsarsuaq, Greenland. Recent results showing a comparison between results from this technique as used on the ground and related techniques from space are also discussed. The data sets obtained to date suggest rapid, and as yet unexplained changes, in the atomic oxygen to molecular nitrogen ratio during certain periods of auroral precipitaion. Some of these changes appear to be due to local sources
Hecht James H.
Strickland Douglas J.
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