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Creating Accurate Geoid for Arctic Region using GRACE Data

This study by C.C. Tscherning at University of Copenhagen focuses on creating a new geoid model for the Arctic region based on GRACE satellite observations. The parameters and error estimation techniques are discussed, with emphasis on mean sea surface height and bias correction. The research also covers data gridding for efficient computations using spherical FFT (GEOCOL) methodology. (Word count: 55) 8

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Creating Accurate Geoid for Arctic Region using GRACE Data

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  1. ARCGICE WP 2.1 Leader: DSPC Make new geoid of afrctic region based on GRACE C.C.Tscherning, University of Copenhagen, 2005-03-01 1

  2. Parameter and error-estimation Observations: • Parameter is equal to N0 mean sea surface height • Ai = 1 if bias only • for all values of i which are associated with geoid heights. C.C.Tscherning, University of Copenhagen, 2005-01-13 2

  3. Parameter estimate • Then an estimate of T and of the parameters X are obtained as • where W is the a-priori weight matrix for the parameters (Generally the zero matrix). C.C.Tscherning, University of Copenhagen, 2005-01-13 3

  4. Data gridding Data may be gridded, so that spherical FFT can be used. (GEOCOL). C.C.Tscherning, University of Copenhagen, 2005-01-13 4

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