Fuel efficient methods for satellite stationkeeping and...

Details Fuel efficient methods for satellite stationkeeping and... Fuel efficient methods for satellite stationkeeping and...

B - Operations, Transporting

64

G

B64G 1/26 (2006.01) B64G 1/40 (2006.01) G05D 1/08 (2006.01)

Patent

CA 2255257

Satellite stationkeeping and momentum-dumping methods are facilitated by the use of diagonally-arranged thruster pairs which are positioned on a selected one of a nadir and an antinadir satellite face. A first one of the thruster pairs is directed so that its thruster forces are spaced by moment arms from the satellite's center of mass. Firings of this thruster pair are separated by a momentum-dumping right ascension difference that is chosen to enhance momentum authority. These firings generate momentum-dumping torques and contribute to stationkeeping velocity changes. A second one of the thruster pairs is directed so that its thruster forces substantially pass through the center of mass. Firings of this thruster pair are separated by a stationkeeping right ascension difference chosen to minimize fuel consumption while providing a major portion of stationkeeping velocity changes.

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