Abstract
A dynamical global ocean model is used to determine the general circulation and its associated transports from data. As a reference a surface geostrophic velocity can be calculated from the slope of the sea surface height, which is measured by satellite altimetry. To get absolute values for the sea surface elevation relative to the equipotential surface we want to assimilate not only altimeter data but also geoid heights into our global ocean model. Until nowadays the assimilation of geoid heights has been done only in few cases, because the accuracy of the available gravity models is not sufficient. With the CHAMP satellite and future satellite missions we will get highly improved gravity models. Since these data are not available yet we use the EGM96 geoid models for our recent experiments. It is planned to esitmate corrections not only for the ocean model but also for the geoid models. We want to present the technique which will be used to assimilate the geoid data into the global ocean model.
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