In view of the extensive scientific interest in the multi-mode X-Band SAR data from the TerraSAR-X mission and in view of the great importance the accurate orbit ephemeris information has for all application modes, it is proposed that|
- GeoForschungsZentrum Potsdam (GFZ) in collaboration with the University of Texas Center for Space Research (CSR) provides a Tracking, Occultation and Ranging (TOR) instrument package, consisting of an experimental IGOR-class high-quality GPS tracking receiver and a CHAMP-class laser retroreflector set, and the necessary support for the integration of the instrument package aboard the TSX spacecraft.
- GFZ and CSR jointly verify the in-orbit performance of the flight receiver and laser retroreflector data and compute high-precision TSX orbits from the validated TOR package data in order to enhance the efficiency of the SAR data processing and the quality of the SAR data products.
- GFZ and CSR both collect atmospheric and ionospheric radio occultation (RO) data with the same IGOR receiver for augmenting the global RO data sets as obtained from other LEO satellites (CHAMP and GRACE) to be used for improvements of numerical weather forecasts, climate change studies and space weather monitoring. Derived fundamental atmospheric and ionospheric quantities (e.g. temperature, water vapor) will be used as complementary information for SAR error correction.
- GFZ, CSR and the Technical University Berlin (TUB) Institute for Photogrammetry and Cartography use the resulting high quality orbit and atmospheric correction products in conjunction with DLR-provided TSX-X band SAR data for the regions specified in B.1.2.3 for improved scientific analyses. As mentioned before, the primary scientific applications are monitoring the evolution of city surface subsidence, to monitor and model local geologic hazards such as landslides and rock falls and to assess the impact of ice sheet and glacier system dynamics.