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Comparison of some methods for modifying Stokes' formula in the GOCE era

Mr Jonas Aagren(1)and Professor Lars E. Sjoeberg(1)

(1) Royal Institute of Technology, Drottning Kristinas Vag 30, SE-100 44 Stockholm, Sweden


The dedicated satellite gravity mission GOCE will drastically improve our knowledge of the long to medium wavelengths of the Earth's gravity field. In order to determine the finest details, however, we still have to utilise regional gravity data. It is the purpose of this paper to study three modifications of Stokes' formula numerically, using simulated standard errors for the GOCE potential coefficients. The methods tested are the standard remove-compute-restore, the least squares and the low-degree GOCE-only modifications. In the latter it is required that only GOCE information must influence the determination of the lowest degrees.


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Keywords: ESA European Space Agency - Agence spatiale europeenne, observation de la terre, earth observation, satellite remote sensing, teledetection, geophysique, altimetrie, radar, chimique atmospherique, geophysics, altimetry, radar, atmospheric chemistry