AbstractThe German small geoscientific satellite CHAMP flies around the Earth since July 2000 in a highly inclined orbit with an altitude of initially 450 km and meanwhile at about 400 km. From the gravitational orbit perturbations, exploiting GPS-CHAMP satellite-to-satellite tracking and on-board accelerometer data over a time span of altogether six months, a new long-wavelength global gravity field model, called EIGEN-2, has been derived in a German/French effort. Thanks to CHAMP's dedicated orbit configuration, continuous GPS tracking and in-orbit measurement of non-gravitational satellite accelerations, the new CHAMP-only solution provides the geoid and gravity with an accuracy of 10 cm and 0.5 mGal, respectively, at a half wavelength resolution of 550 km. This is an improvement by almost one order of magnitude compared to any multi-satellite pre-CHAMP satellite-only gravity field model.


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    Title :

    The CHAMP-only earth gravity field model EIGEN-2


    Contributors:
    Reigber, Ch (author) / Schwintzer, P (author) / Neumayer, K.-H (author) / Barthelmes, F (author) / König, R (author) / Förste, Ch (author) / Balmino, G (author) / Biancale, R (author) / Lemoine, J.-M (author) / Loyer, S (author)

    Published in:

    Advances in Space Research ; 31 , 8 ; 1883-1888


    Publication date :

    2003-03-14


    Size :

    6 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



    The CHAMP-only Earth Gravity Field Model EIGEN-2

    Reigber, C. / Schwintzer, P. / Neumayer, K.-H. et al. | British Library Conference Proceedings | 2003


    The CHAMP-only earth gravity field model EIGEN-2

    Reigber, Ch | Online Contents | 2003



    GPS-only gravity field recovery with GOCE, CHAMP, and GRACE

    Jäggi, A. / Bock, H. / Prange, L. et al. | Elsevier | 2010