ITG-GRACE: Global Static and Temporal Gravity Field Models from GRACE Data

  • Torsten Mayer-Gürr
  • Annette Eicker
  • Enrico Kurtenbach
  • Karl-Heinz Ilk
Chapter
Part of the Advanced Technologies in Earth Sciences book series (ATES)

Abstract

More than 4 years of GRACE data were used to determine the gravity field model ITG-Grace03 s. The solution consists of three parts: a static high resolution model up to a spherical harmonic degree of 180, temporal variations up to degree 40 and the full variance-covariance matrix for the static solution. The temporal gravity field variations are parameterized by continuous basis functions in the time domain. The physical model of the gravity field recovery technique is based on Newton’s equation of motion, formulated as a boundary value problem in the form of a Fredholm type integral equation. The principal characteristic of this method is the use of short arcs of the satellite’s orbit in order to avoid the accumulation of modeling errors and a rigorous consideration of correlations between the range observations in the subsequent adjustment procedure.

Keywords

GRACE ITG-GRACE 03 Splines Full covariance-matrix Static and temporal gravity field 

Notes

Acknowledgments

The support by BMBF (Bundesministerium fuer Bildung und Forschung) and DFG (Deutsche Forschungsgemeinschaft) within the frame of the Geotechnologien-Programm is gratefully acknowledged.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • Torsten Mayer-Gürr
    • 1
  • Annette Eicker
    • 1
  • Enrico Kurtenbach
    • 1
  • Karl-Heinz Ilk
    • 1
  1. 1.Institute of Geodesy and Geoinformation, University of BonnBonnGermany

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