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Precise Range And Range-Rate Equipment (PRARE) was a microwave tracking system on board the ERS-2 mission. It operated at centimetre accuracy levels for the measurement of satellite to ground range and range rate. The concept was based on an autonomous spaceborne two-way and dual frequency microwave tracking system with its own telemetry, telecommand, data storage, timing and data transmission capabilities. This allowed data analysis on a global basis within a very short time delay. Due to the microwave transmission concept, the system operated independently from weather and daylight conditions.

The initial PRARE system development started in 1982 in Germany as a response to ESA's announcement of opportunity for exploitation of Europe's new Earth-remote sensing satellite series starting with ERS-1. The project was funded by BMFT and DARA, defined/designed by Ph. Hartl (University of Stuttgart) and Ch. Reigber of DGFI (German Geodetic Research Institute), Munich and since 1992 of GFZ (GeoForschungsZentrum), Potsdam. 


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blue arrow DATA DOWNLOAD

Download data from the ERS-2 mission through the ESA Online Dissemination System. The data is freely available to registered users.



All ERS-2 PRARE products, in accordance with ESA Earth Observation Data Policy, are freely available to users. Read more about the available PRARE products: