The authors present the results of an investigation of ground antenna pointing errors which are caused by fluctuations of the receiver automatic gain control signal due to thermal noise and a spinning spacecraft. Transient responses, steady-state errors and losses are estimated using models of the digital conscan (conical scan) loop, the fast Fourier transform (FFT), and antenna characteristics. Simulation results are given for the Voyager mission and for the Galileo mission, which uses a spinning spacecraft. The simulation for the Galileo spacecraft predicts 1 mdeg of error with a 1280-s scan and 4 mdeg with a 32-s scan assuming an AGC loop signal-to-noise ratio of 35 to 30 dB.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Pointing a ground antenna at a spinning spacecraft using conical scan-simulation results


    Additional title:

    Forschungsergebnisse zu Übertragungsfehlern bei der Weltraum-Nachrichtenübertragung


    Contributors:
    Mileant, A. (author) / Peng, T. (author)


    Publication date :

    1989


    Size :

    7 Seiten, 3 Quellen


    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    CONICAL SCANNING PROCESS FOR SPACECRAFT SUN POINTING

    SHOER JOSEPH / SINGH LEENA / LIM SUNGYUNG et al. | European Patent Office | 2017

    Free access

    Conical scanning process for spacecraft sun pointing

    SHOER JOSEPH / SINGH LEENA / LIM SUNGYUNG et al. | European Patent Office | 2019

    Free access

    Pointing Budgets for Spinning Spacecraft - Planck Mission

    Dungate, D. / European Space Agency | British Library Conference Proceedings | 2003


    Velocity Pointing Errors Associated with Spinning Thrusting Spacecraft

    Daniel Javorsek / James M. Longuski | AIAA | 2000