Impact Of GOCE On The Nordic Gravity Field Modelling

Hasan Yidiz, René Forsberg, C. C. Tscherning, Gabriel Strykowski

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GOCE level-2 Tzz and Txx gravity gradients at satellite altitude are used in combination as input data to predict surface free air gravity anomalies over the Nordic region using Least Square Collocation. We test the performance of using covariance functions created
separately from Tzz gradients and surface free air gravity anomalies to predict terrestrial gravity anomalies with a direct comparison of 19 mgal level and much better (7-8 mgal) when surface data are filtered at the GOCE resolution. We found that the results are slightly
dependent of covariance function. Combined with DTU10 Mean Sea Surface model, both the NKG-2004 quasi-geoid model of the Nordic and Baltic Area and the one obtained using second generation GOCE spherical harmonic coefficients based on time-wise method can successfully reproduce the higher level of the Baltic Sea relative to the Atlantic Ocean.
Original languageEnglish
Title of host publicationProceedings of 4th International GOCE User Workshop
Number of pages6
PublisherEuropean Space Agency
Publication date2011
ISBN (Print)978-92-9092-260-5
Publication statusPublished - 2011
Event4th International GOCE User Workshop - Technische Universität München (TUM), Münich, Germany
Duration: 31 Mar 20111 Apr 2011
Conference number: 4


Conference4th International GOCE User Workshop
LocationTechnische Universität München (TUM)
Internet address

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