| Summary: | Fast delivery of CHAMP occultation data products to weather services for assimilation into numerical weather prediction models makes a very fast access to the CHAMP tracking and radio occultation raw data necessary as well as an ultra-rapid production of the GPS and CHAMP orbit ephemerides and the processing of atmospheric profiles. In the course of a special research programme of the German Helmholtz Association entitled GPS atmosphere sounding project (GASP) an S-band downlink station at Ny-Alesund in Spitzbergen has been established for accessing CHAMP science data every 100 minutes. With the low latency CHAMP GPS groundstation network, the fast orbit as well atmosphere processors being operated within the CHAMP Science Data System infrastructure, orbit and occultation products can be generated within a few hours. The presentation will describe the data flow and processing procedures and will provide results on achievable turn around times and quality of derived data products.
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