Process and system for discharging a test mass free-floating in a satellite
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United States of America Patent
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Sep 27, 2011
Grant Date -
May 7, 2009
app pub date -
Oct 30, 2008
filing date -
Oct 31, 2007
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In a process for discharging a test mass that is free-floating in a surrounding electrode casing on board a satellite, the electrode casing is enclosed by a vacuum tank, and has one or more first electrodes for the application of electrostatic forces and/or moments to the test mass. In addition, the electrode casing also has one or more second electrodes for modulating alternating voltages (particularly, high frequency voltages) for measuring purposes onto the test mass as well as one or more light-emitting elements, which irradiate the test mass, the electrode casing and/or the electrodes particularly with ultraviolet light for generating a photoelectric effect. Automatically and iteratively, a test mass charge of the test mass is determined. A control operation for eliminating the determined test mass charge is carried out until the test mass charge has reached a defined target value.
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