Satellite or Space Geodesy covers the complete spectrum of techniques related to space. It includes Very Long Baseline Interferometry (VLBI), Satellite-Laser Ranging (SLR) and satellite gravity missions. Main topic at PSG in the last years are Global Satellite Navigation Systems (GNSS) due to their importance in many fields and altimetry. They are a focus area since the 1980’. Altimetry is studied since the 1990’ and the special topics of PSG are the coastal zone applications, combination of tide gauges and altimetry for sea-level change. Presently the development of re-tracking algorithms for the new SAR-satellites like Cryosat-2 and Sentinel 3 are the main interest.