In-flight investigations of geosynchronous spacecraft charging

Details In-flight investigations of geosynchronous spacecraft charging In-flight investigations of geosynchronous spacecraft charging

Sep 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003esasp.540..677n&link_type=abstract

In: Proceedings of the 9th International Symposium on Materials in a Space Environment, 16-20 June 2003, Noordwijk, The Netherla

Computer Science

Space Environment, Materials

Scientific paper

Analysis of measurement data obtained for hot magnetosphere plasma fluxes in geosynchronous orbit has enabled to establish correlation between geosynchronous spacecraft charging and the plasma parameters. The measurements were done onboard the Russian geosynchronous GORIZONT and ELECTRO spacecraft during years 1992-1993 and 1995-1997 correspondingly. Distortions the measured electron and proton spectra caused by negative spacecraft potential were registered. Spacecraft charging was observed not only in the Earth's shadow (during vernal and autumnal equinoxes), but in the sunlit orbit segments. Well-defined correlation between the spacecraft charging (potential value) and the electron flux parameters ("hardness" of the electron energy spectrum) was revealed. Negative potential values in the 0.2-8.0 kV interval were observed. Typical electron spectra and plasma parameters were determined for various spacecraft charging levels.

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