ATS-5 and ATS-6 potentials during eclipse

Details ATS-5 and ATS-6 potentials during eclipse ATS-5 and ATS-6 potentials during eclipse

Sep 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979aifo.reptr....r&link_type=abstract

Interim Report Air Force Geophysics Lab., Hanscom AFB, MA.

Physics

Geophysics

Ats 5, Ats 6, Eclipses, Spacecraft Charging, Electric Potential, Electron Energy, Magnetometers, Space Charge

Scientific paper

ATS-5 and ATS-6 data for spacecraft charging during eclipse conditions are analyzed. ATS-5 and ATS-6 charged to voltages greater than 100 volts for about 55% of the eclipse periods examined. The mean spacecraft potential during eclipse was 2 keV for ATS-5, and the highest potential measured was 10 kilovolts. For ATS-6, the mean potential during eclipse was 4 keV, the highest potential measured being 20 keV. The average measured spacecraft potentials for both ATS-5 and 6 depend, approximately linearly, upon K sub p. This relationship is due mainly to the dependence of electron current density on K sub p near midnight. Spacecraft potentials at geosynchronous orbit may, to a rough approximation, thus be inferred from ground-based measurements of K sub p, the planetary 3 hour index.

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