Abstract
This paper briefly describes the data and orbit analysis activities at The Johns Hopkins University Applied Physics Laboratory which support the U.S. Navy satellite Doppler system Tranet. Two topics are discussed in detail which are directly related to geodetic research, the major application of this system. These topics are the editing and archiving of the Doppler data and the generating of orbital ephemerides to an accuracy compatible with the 10 m accuracy of the experimental Doppler data.

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