Thursday 25 August 2005

GP3
1000-1200 hours

339
Mean sea surface, geoid and bathymetry from multiple satellites in the Arctic region
Andersen, Ole B.¹, Knudsen, Per¹, Barry, Philippa²
1 Danish National Space Center, Copenhagen, Denmark
2 De Montford University, Leicester, UK
Author email: oa@spacecenter.dk
The mean sea surface is one of the key parameters in geodesy and physical oceanography. Combined with an accurate model of the geoid it yield valuable information on the mean dynamic topography. The DNSC05 Mean Sea Surface is derived from a combination of newly retracked altimetry from 6 different satellites and a total of 8 different satellite missions like the T/P, T/P Tandem Mission, ERS1 ERM+GM, ERS2 ERM, ICESAT, GEOSAT GM, and GFO-ERM data. For all missions the MSS has been derived with what is believed to be the best available geophysical and range corrections. The mean sea surface can also be used to derive information about the gravity field in the Arctic region and consequently knowledge about the bathymetry. Using retracked altimetry seriously increases the coverage and accuracy of both gravity, MSS and bathymetry prediction in the Arctic ocean.

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