This paper addresses the problem of estimating the masses of Phobos and Deimos from Doppler and onboard optical measurements during the Viking extended mission. A Kalman filter is used to analyze the effects of gravitational uncertainties and nongravitational accelerations. These accelerations destroy the dynamical integrity of the orbit and multi-batch or limited memory filtering is preferred to single batch processing. Optical tracking is essential to improve the relative orbit geometry. The masses can be determined to about 10% and 25% respectively for Phobos and Deimos, assuming satellite densities of about 3 g per cu cm.


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    Title :

    Accuracy of estimating the masses of Phobos and Deimos from multiple Viking orbiter encounters


    Contributors:

    Conference:

    Astrodynamics Specialist Conference ; 1975 ; Nassau, Bahamas


    Publication date :

    1975-07-01


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English




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    The Mass of Mars, Phobos, and Deimos, from the Analysis of the Mariner 9 and Viking Orbiter Tracking Data

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