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GPS Radio Occultation with TerraSAR-X

German radar satellite TerraSAR-X

TerraSAR-X is a German satellite for Earth Observation, which was launched on July 14, 2007. The mission duration was foreseen to be 5 years. TerraSAR-X carries an innovative high resolution x-band sensor for imaging with resolution up to 1 m.

TerraSAR-X carries as secondary payload an IGOR GPS receiver with GPS RO capability. GFZ provided the IGOR and is responsible for the related TOR experiment (Tracking, Occultation and Ranging). TerraSAR-X provides continuously atmospheric GPS data in near-real time. These data from GFZ are continuously assimilated in parallel with those from GRACE-A by the world-leading weather centers to improve their global forecasts. TerraSAR-X, together with TanDEM-X also forms a twin-satellite constellation for atmosphere sounding and generates a unique data set for the evaluation of the accuracy of the GPS-RO technique.  


[1] Zus, F., G. Beyerle, L. Grunwaldt, S. Heise, G. Michalak, T. Schmidt and J. Wickert, Sensitivity of GPS radio occultation atmospheric soundings w.r.t. open loop signal tracking parameters, submitted to Advances in Space Research, 2013.  

[2] Beyerle, G., L. Grunwaldt, S. Heise, W. Koehler, R. Koenig, G. Michalak, M. Rothacher, T. Schmidt, J. Wickert, B. Tapley, B. Giesinger, First results from the GPS atmosphere sounding experiment TOR aboard the TerraSAR-X satellite. Atmospheric Chemistry and Physics, 11, 13, 6687-6699, 2011.  

[3] Wickert, J.; Schmidt, T.; Michalak, G.; Heise, S.; Arras, C.; Beyerle, G.; Falck, C.; König, R.; Pingel, D.; Rothacher, M., GPS Radio Occultation with CHAMP, GRACE-A, SAC-C, TerraSAR-X, and FORMOSAT-3/COSMIC: Brief Review of Results from GFZ. - In: Steiner, A.; Pirscher, B.; Foelsche, U.; Kirchengast, G. (Eds.), New Horizons in Occultation Research Studies in Atmosphere and Climate, Springer, 3-16, 2009.

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