Abstract
Communications and Broadcasting Engineering Test Satellite(COMETS)which was launched on February 21 in 1998 has a large movable antenna. This paper deals with a method to compensate disturbances caused by the antenna motion to the spacecraft attitude. The disturbances are calculated and compensated on-orbit based on the predicted antenna parameters. Then the parameters are estimated and modified from the results of the on-orbit compensation. The on-orbit experimental results show that the disturbance compensation is effective to reduce the spacecraft attitude error and becomes better by using the modified disturbance parameters.
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