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Does anyone know what Danish Space centre DNSC08 mean sea surface model uses as the reference ellipsoid? there is no meta data on the web site:

http://www.space.dtu.dk/English/Research/Scientific_data_and_models/Global_Mean_sea_surface.aspx

There are several publications.
50% state TOPEX (the data comes from the IceSat missions) 50% state WGS84.

The difference between TOPEX and WGS is ~0.7m which is very significant.

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Topex - information given to me by someone at the danish space center

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