Attitude Determination of the HIPPARCOS Satellite
In a first part, the measurements by the star-mapper that permit an accurate attitude determination are described. Every observation gives a condition equation that is used to determine the attitude variations. In the second part, the torques acting on the satellite are given and the construction of a first order analytical theory of the rotation of the satellite is sketched. Finally, the form of the solution is given. Two simpler representations that are actually adopted in the HIPPARCOS data reduction Consortia are also described and justified.
KeywordsFocal Plane Attitude Determination Main Grid Star Image Gravity Gradient Torque
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