G - Physics – 05 – D
Patent
G - Physics
05
D
341/97
G05D 1/10 (2006.01) B64G 1/24 (2006.01) B64G 1/36 (2006.01) G01C 21/24 (2006.01) G05D 1/08 (2006.01) B64G 1/26 (2006.01)
Patent
CA 2000214
TEXT OF THE ABSTRACT A stationkeeping method for a satellite in geostationary orbit comprises the steps of : - determining at the same time the angle .alpha.1 between the satellite-Sun direction and the satellite-Earth direction and the angle .alpha.2 between the satellite-Pole Star direction and the satellite-Earth direction, - deducing therefrom a state vector E consis- ting in orbital parameters by the formula: Z = H.E + C.B where: . Z is a measurment vector the components of which are deduced from the angles .alpha.1 and .alpha.2, . H is a measuring matrix, . C is a bias sensitivity matrix, . B is a bias vector determined beforehand by comparison of the measured vector Z and measurements made on the ground, - determining stationkeeping manoeuvres and applying same by means of thrusters.
Aerospatiale Societe Nationale Industrielle
Riches Mckenzie & Herbert Llp
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