GPS Anomaly Resolution and the Satellite Reference Station (SRS)

Andy Chasko, and David A. Garay

Abstract:	The GPS Joint Program Office (JPO) developed the SRS to monitor military P(Y) code signals during the testing of Block I, II, IIA, and IIR satellites and User Equipment (UE). The SRS provides an independent monitor of the signal-in-space (SIS) error, and has been operated by the 746 TS at Holloman AFB since 1991. The GPS JPO and Air Force Operational Test and Evaluation Center (AFOTEC) have used SRS tracking data to comprehensively evaluate both military and civilian signals during on-orbit tests of the GPS satellites. The 746 TS has also used the SRS in support of the GPS JPO by conducting anomaly resolution studies to isolate the causes of multiple GPS run-offs and anomalies observed over the past decade. This paper presents the SRS background, methodology, and accuracy and discusses results from two anomaly resolution case studies.
Published in:	Proceedings of the 2004 National Technical Meeting of The Institute of Navigation January 26 - 28, 2004 The Catamaran Resort Hotel San Diego, CA
Pages:	598 - 606
Cite this article:	Chasko, Andy, Garay, David A., "GPS Anomaly Resolution and the Satellite Reference Station (SRS)," Proceedings of the 2004 National Technical Meeting of The Institute of Navigation, San Diego, CA, January 2004, pp. 598-606.
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