The Goddard Space Flight Center is currently developing autonomous navigation systems for satellites in high-Earth orbits where acquisition of the GPS signals is severely limited This paper discusses autonomous navigation improvements for high-Earth orbiters and assesses projected navigation performance for these satellites using Global Positioning System (GPS) Standard Positioning Service (SPS) measurements. Navigation performance is evaluated as a function of signal acquisition threshold, measurement errors, and dynamic modeling errors using realistic GPS signal strength and user antenna models. These analyses indicate that an autonomous navigation position accuracy of better than 30 meters root-mean-square (RMS) can be achieved for high-Earth orbiting satellites using a GPS receiver with a very stable oscillator. This accuracy improves to better than 15 meters RMS if the GPS receiver's signal acquisition threshold can be reduced by 5 dB-Hertz to track weaker signals.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Autonomous Navigation Improvements for High-Earth Orbiters Using GPS


    Contributors:

    Conference:

    Spaceflight Dynamics ; 2000 ; Biarritz, France


    Publication date :

    2000-01-01


    Type of media :

    Preprint


    Type of material :

    No indication


    Language :

    English




    Autonomous Navigation Improvements for High-Earth Orbiters Using GPS

    A. Long / D. Kelbel / T. Lee et al. | NTIS | 2000



    Spacecraft Autonomous Navigation for Formation Flyng Earth Orbiters Using GPS

    Guinn, J. / Boain, R. / American Institute of Aeronautics and Astronautics et al. | British Library Conference Proceedings | 1996