Real-time refinement method of spacecraft star tracker alignment estimates

摘要

A method of estimating the alignment of a star sensor ( 20 ) for a vehicle ( 12 ) includes generating star tracker data. A vehicle attitude and a star sensor attitude are determined in response to the star tracker data. A current alignment sample is generated in response to the vehicle attitude and the star sensor attitude. A current refined estimate alignment signal is generated in response to the current alignment sample and a previously refined estimate alignment signal via a vehicle on-board filter ( 38 ).