Physics
Scientific paper
Dec 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agufmsa43a1081w&link_type=abstract
American Geophysical Union, Fall Meeting 2005, abstract #SA43A-1081
Physics
7538 Solar Irradiance, 7549 Ultraviolet Emissions, 7969 Satellite Drag (1241), 7974 Solar Effects
Scientific paper
The Solar EUV Experiment (SEE) aboard the TIMED spacecraft nominally measures the solar irradiance from 0.1-193 nm and has been operating from January 2002 to the present. The orientation of TIMED provides a stable, nearly constant view factor to the ram direction. Together, the TIMED orientation and SEE measurements provide a unique opportunity to determine the influence of the solar radiation on satellite drag. This paper presents the first results of this high altitude upper atmospheric satellite drag study including: determining precision orbital changes of the TIMED spacecraft using the on-board GPS navigation system, validation of the drag estimate, identifying the key wavelength ranges in the solar spectrum that affect the orbit changes, and creation of a solar irradiance index from those wavelengths that is representative of the atmospheric drag experienced by TIMED.
Eparvier Francis G.
Woodraska Donald L.
Woods Thomas N.
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