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GOCE and Its Use for a High-Resolution Global Gravity Combination Model

  • Richard ShakoEmail author
  • Christoph Förste
  • Oleg Abrikosov
  • Jürgen Kusche
Chapter
Part of the Advanced Technologies in Earth Sciences book series (ATES)

Abstract

The recently launched GOCE mission will set a new milestone in gravity field determination. Due to the high accuracy of its gradiometry observations, the resulting satellite-only Earth gravity models will have a resolution of up to degree/order 250, with an expected accuracy of 1–2 cm in terms of geoid heights. In order to increase this resolution up to at least 360, a combination with surface data is necessary. In the following article the strategies for this combination developed at GFZ, Helmholtz-Zentrum Potsdam, are outlined and discussed. Basically two approaches for the combination exist; the first uses complete and block-diagonal normal equations, while the other uses complete normal equations only. In this article, both approaches are explained with their pros and cons, and the GFZ-strategy is presented at its current stage for the combination of GOCE with GRACE and surface data.

Keywords

Earth gravity field model Global gravity field recovery GRACE GOCE Satellite gradiometry Surface gravity field data Combined gravity field model 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • Richard Shako
    • 1
    Email author
  • Christoph Förste
    • 1
  • Oleg Abrikosov
    • 1
  • Jürgen Kusche
    • 2
  1. 1.Department 1: Geodesy and Remote SensingHelmholtz Centre Potsdam, GFZ German Research Centre for GeosciencesPotsdamGermany
  2. 2.University of Bonn, Institute of Geodesy and GeoinformationBonnGermany

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