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Title: Recent Mcs Improvements To Gps Timing
Author: Capt Steven T. Hutsell
Source: 1995 Measurement Science Conference
Year Published: 1995
Abstract: With the completion of a 24 operational satellite constellation, GPS is well capable of providing the timing accuracy and stability performance required by system specitications. Now that weve successfully reached this major milestone, the GPS community will need to address future timing enhancement proposals with extra prudence. This paper demonstrates how the Master Control Station @ES) recently improved four operational aspects of GPS timing. These advancements include a re-stmctore of the MCS Kahnan Filter partitions, a change to the GPS time steering magnimde, a software change allowing greater flexibiIity when utilizing United States Naval Observatory (USNO) data, and a long-awaited refinement to Rubidium clock drill rate estimation. The above enhancements have all significantly improved GPS accuracy and stability figures. As a by-product, this tine tuning has increased the MC% ability to evaluate the performance of individual atomic frequency standards and of MCS Kahnan Filter estimation.

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