Autonomous orbit control method and system for a geostationary satellite
CA 2000214 C · Owner: Aerospatiale Societe Nationale Industrielle · Inventors: Maute, Patrick Aime Alexandre
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
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 consisting 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, - …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed October 5, 1989 and granted December 21, 1993. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 5, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 5, 2011.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.