Physics – Plasma Physics
Scientific paper
May 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agusmsm52a..12l&link_type=abstract
American Geophysical Union, Spring Meeting 2002, abstract #SM52A-12
Physics
Plasma Physics
7800 Space Plasma Physics, 7815 Electrostatic Structures, 7853 Spacecraft/Atmosphere Interactions, 7855 Spacecraft Sheaths, Wakes, Charging
Scientific paper
This is to update the statistical analysis of critical temperature for the onset of spacecraft charging at geosynchronous altitudes. We begin with a brief review of the theory of critical temperature in a Maxwellian space plasma. Below the critical temperature for a surface material, no spacecraft charging occurs. The spacecraft charging potential data are obtained from the ion line of the ion energy spectrum. If the ion line can not be clearly identified, the data point is flagged and we discarded it for our analysis. Since the critical temperature depends on the surface material and since each satellite has its own surface material or materials, each satellite is expected to have its own critical temperature. By using the spacecraft charging data measured in eclipse on several geosynchronous satellites over years, we have obtained the critical temperatures of each satellite with statistical deviations.
Lai Shan T.
Tautz Maurice
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