A Common View Analysis of Data Collected from DMA GPS Monitor Stations

David Muion, Clayton Coker, Tom Creel

Abstract:	We present results from an analysis of data collected at the Defense Mapping Agency (DMA) Global Positioning System monitor station network. The goal of this study is to make an assessment about the viability of using common-view time transfer as an operational mechanism for monitoring the behavior of the HP 5071 A frequency standards at each of these stations. This behavior can be related to the DOD master clocks through the data collected at the monitor station located at the U.S. Naval Observatory. In order to understand the behavior of the MS frequency standards we have examined the psuedorange data collected by a subset of the DMA monitor stations over a period of six weeks beginning in late December, 1995. The collected 15 minute smoothed psuedorange data, weather data, and broadcast navigation messages were then used to compute the time differences between stations with satellite vehicles (SVs) in common view. These results were then used to compute frequency offsets and drifts, a six week error budget, as well as Allan variances for the frequency standards. These results will be presented, along with conclusions about the usefulness of using common-view techniques.
Published in:	Proceedings of the 9th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1996) September 17 - 20, 1996 Kansas City, MO
Pages:	297 - 305
Cite this article:	Muion, David, Coker, Clayton, Creel, Tom, "A Common View Analysis of Data Collected from DMA GPS Monitor Stations," Proceedings of the 9th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1996), Kansas City, MO, September 1996, pp. 297-305.
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