Improvements in height datum transfer expected from the GOCE mission |
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| Authors: | D Arabelos C C Tscherning |
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| Institution: | (1) Department of Geodesy and Surveying, University of Thessaloniki, 540 06 Thessaloniki, Greece, GR;(2) Department of Geophysics, University of Copenhagen, Juliane Maries Vej 30, 2100 Copenhagen, Denmark, DK |
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| Abstract: | One of the aims of the Earth Explorer Gravity Field and Steady-State Ocean Circulation (GOCE) mission is to provide global
and regional models of the Earth's gravity field and of the geoid with high spatial resolution and accuracy. Using the GOCE
error model, simulation studies were performed in order to estimate the accuracy of datum transfer in different areas of the
Earth. The results showed that with the GOCE error model, the standard deviation of the height anomaly differences is about
one order of magnitude better than the corresponding value with the EGM96 error model. As an example, the accuracy of the
vertical datum transfer from the tide gauge of Amsterdam to New York was estimated equal to 57 cm when the EGM96 error model
was used, while in the case of GOCE error model this accuracy was increased to 6 cm. The geoid undulation difference between
the two places is about 76.5 m. Scaling the GOCE errors to the local gravity variance, the estimated accuracy varied between
3 and 7 cm, depending on the scaling model.
Received: 1 March 2000 / Accepted: 21 February 2001 |
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| Keywords: | : Height Datum Transfer – GOCE Mission |
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