Abstract Satellite gravity gradiometry has been applied in GOCE mission to obtain higher harmonics of the Earth’s gravity mapping. In-orbit results showed that the precision of GOCE gradiometry achieved a level of 10–20mE/Hz1/2 in the bandwidth of 38–100mHz, and the major error source came from the intrinsic noise of the core sensor electrostatic accelerometer. Two schemes for improving sensitivity of such accelerometer are presented by optimizing the parameters to reduce the dynamic range and choosing the heavier proof mass to suppress the thermal noise limited by the discharging gold wire. As a result, an accelerometer with a better resolution of 6.6 × 10−13 m/s2/Hz1/2 could be developed, and then a precision of 3mE/Hz1/2, corresponding to a spatial resolution of about 78km half wavelength, is achievable for the future satellite gradiometric mission.


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    Title :

    Electrostatic gravity gradiometer design for the future mission


    Contributors:
    Zhu, Z. (author) / Zhou, Z.B. (author) / Cai, L. (author) / Bai, Y.Z. (author) / Luo, J. (author)

    Published in:

    Advances in Space Research ; 51 , 12 ; 2269-2276


    Publication date :

    2013-01-31


    Size :

    8 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English