Abstract
The POTSDAM-5 program system is based on the numerical integration of the perturbation equations. As a quasi-intertial system the mean astronomical system for the reference epoch J 2000.0 is chosen. The realization of the reference system and the force model is provided for the cm-level. Especially, the latest theories of nutation and tides are implemented for station positioning and orbit dynamics. On the basis of the highly accurate orbit calculations station coordinates, earth-rotation parameters, bias parameters, and some geodynamic parameters can be determined by means of photographical, laser, positional, doppler, and satellite-interferometric measurements. Applications are mainly related to satellite laser ranging data of LAGEOS. Precise station coordinates and earth-rotation parameters were derived using the data of the MERIT Campaign.
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