A study of the charging and discharging characteristics of a typical geosynchronus satellite experiencing time-varying geomagnetic substorms, in sunlight, is conducted. The NASA Charging Analyzer Programm (NASCAP) is used. An electric field criteria of 1.5x10 (exp5) volts/cm to initiate discharges and transfer of 67% of the stored charge is used in this study, based on ground results. The substorm characteristics are arbitrarily chosen to evaluate effects of electron temperature and particle density (which) is equivalent to current density). It has been found that while there is a minimum electron temperature for discharges to occur, the rate of discharges is dependent on particle density and duration times of the encounter. Hence, it is important to define the temporal variations in the substorm environments.


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    Title :

    NASCAP modelling of environmental-charging-induced discharges in satellites


    Additional title:

    NASCAP Model zur Beschreibung von Aufladungseffekten in Satelltiten


    Contributors:

    Published in:

    Publication date :

    1979


    Size :

    9 Seiten, 7 Bilder, 22 Quellen



    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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