Physics
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsm13d2109i&link_type=abstract
American Geophysical Union, Fall Meeting 2011, abstract #SM13D-2109
Physics
[2720] Magnetospheric Physics / Energetic Particles: Trapped, [2774] Magnetospheric Physics / Radiation Belts, [2788] Magnetospheric Physics / Magnetic Storms And Substorms
Scientific paper
We analyze long-term variation of electric current generated by Akebono solar cell panels (SCPI) and investigate how solar cell panels have been affected by space radiation. SCPI decreased slowly to about 7A in 2009 from 13A in 1989. The long-term decrease is probably due to various space radiations (Total Dose Effect). Therefore, we compare the decrease of solar cell output with solar proton flux measured by GOES satellites on GEO and with flux of trapped radiation from NASA's models (AP8 and AE8). We find a fair correlation between the decrease rate of solar cell output and trapped proton flux (above 10MeV) from the radiation model. However, we also find a few intervals of poor correlation, for an example, after a large geomagnetic storm occurred in March 1991, which suggests that stable proton radiation belt can be changed drastically for some special occasions.
Ishikawa Hiroshi
Matsuoka Ayako
Miyake Wataru
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