As one of the analysis centers of the International GNSS Service (IGS), we process thousands of GNSS observations daily to derive precise station coordinates, satellite orbits, satellite clock corrections and Earth rotation parameters. In line with the current IGS product policy, we provide geodetic products in ultra-rapid (latency 3-9h), rapid (latency (1 day) and final (latency two weeks) mode. GPS, GLONASS and Galileo are currently processed.

All three processing lines follow the same strategy. Based on a well-defined selection of IGS stations, a least squares adjustment is used to derive the unknowns to be determined. Within this network adjustment, the satellite orbits and the clock corrections (i.e. the deviation of the satellite clock with respect to the GPS time) are determined. Phase ambiguities are fixed for GPS and Galileo observations. The generation of the IGS products follows the least squares adjustment, the respective product range depends on the IGS guidelines.