Global Gravity Fields from Simulated Level-1 GRACE Data

  • Ulrich MeyerEmail author
  • Björn Frommknecht
  • Frank Flechtner
Part of the Advanced Technologies in Earth Sciences book series (ATES)


The GRACE satellites deliver high quality GPS code and phase, inter-satellite range and range-rate, non-gravitational acceleration, and star camera observations that can be used to estimate the static and time variable gravity field of the Earth with unprecedented accuracy. Nevertheless, the baseline accuracy that was determined in a pre-launch simulation study could not yet be reached. To find out possible reasons and to give recommendations for an improved data processing, another simulation study using the software, standards and processing strategy actually applied at GFZ in the routine processing of GRACE data is performed. The results point to inaccuracies in present ocean tide models. Additionally, it was found that the accelerometer noise cannot be absorbed sufficiently by the instrument parameters estimated so far and a shortening of the arcs seems to be necessary. Finally, an observed bias in the C20-coefficient of the GRACE gravity field models could be related to a GPS antenna phase centre bias in along-track direction.


GRACE Simulation study Gravity field Baseline accuracy 



This is publication no. GEOTECH-1269 of the GEOTECHNOLOGIEN programme of BMBF, grant 03F0423A.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • Ulrich Meyer
    • 1
    • 2
  • Björn Frommknecht
    • 3
    • 4
    • 5
  • Frank Flechtner
    • 6
  1. 1.Helmholtz-Zentrum Potsdam, Deutsches GeoForschungsZentrum (GFZ)WeβlingGermany
  2. 2.Astronomical Institute, University of BernBernSwitzerland
  3. 3.RHEA S.A.Louvain La NeuveBelgium
  4. 4.ESA/ESRINFrascatiItaly
  5. 5.Institut für Astronomische und Physikalische Geodäsie (IAPG), Technische Universität MünchenMünchenGermany
  6. 6.Department 1: Geodesy and Remote SensingHelmholtz Centre Potsdam, GFZ German Research Centre for GeosciencesPotsdamGermany

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