Solar array degradation on geostationary communications satellites: the quantification of annual degradation and degradation over solar proton events
| Autor: | Whitney Lohmeyer, Raichelle Aniceto, Kerri Cahoy, Ashley Carlton |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
integumentary system
business.industry Photovoltaic system Aerospace Engineering Space weather Fluence Computer Science Applications law.invention Gallium arsenide chemistry.chemical_compound chemistry Space and Planetary Science Control and Systems Engineering law Solar cell Geostationary orbit Optoelectronics Environmental science Degradation (geology) business Space environment |
| Zdroj: | International Journal of Space Science and Engineering. 5:61 |
| ISSN: | 2048-8467 2048-8459 |
| Popis: | Solar array telemetry from eleven geostationary communication satellites, launched between 1990 and 1998, was analysed and used to quantify solar array degradation of gallium arsenide (GaAs) and silicon (Si) solar cells. GaAs cells had an average annual percent degradation ranging between 0.44% and 1.03%, while Si cells had an average annual percent degradation ranging between 0.71% and 1.69%. The decrease in Si cells degradation rates, based on telemetry of Isc and Voc levels, ~1,210% over a ten years mission suggests an update to the Si solar cell degradation design rule of thumb 25% over a ten year mission. Degradation during solar particle events (SPEs) of 10 MeV proton flux > 10,000 pfu was analysed and used to create an initial functional relationship between degradation experienced over SPEs and the accumulated fluence of these SPEs. |
| Databáze: | OpenAIRE |
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