The Tracking and Data Relay Satellite System (TDRSS) uses a groundbased attitude determination algorithm to open loop point the satellite's high data rate antennas. The spacecraft is able to measure its pitch and roll attitude, but its yaw attitude is periodically unobservable. The ground software uses a state-space estimator, an adaptation of a Luenberger observer, to predict the spacecraft yaw angle during these unobservable periods. It contains states associated with the roll/yaw dynamics and the on-board control law. The accuracy is limited by the modeling fidelity of the disturbance torques acting on the spacecraft. After initial operating problems were cleared up, the operation of the estimator has converged to predicted performance.


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    Title :

    Yaw Attitude Estimation for the Tracking and Data Relay Satellite System


    Contributors:
    Staich, S. (author) / Cohen, A. L. (author) / Berkery, E. A. (author)

    Conference:

    Fluid Dynamics, Plasma Dynamics, and Lasers Conference ; 1984 ; Snowmass, CO, United States


    Publication date :

    1984-06-25


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English




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