GPS Integrity: An MCS Perspective

Christopher M. Shank, John Lavrakas

Abstract:	The Master Control Station (MCS) is relied upon to monitor the integrity of the GPS constellation, and it is the sole source to effect repairs should the signal or navigation message degrade beyond specified operational tolerances. This paper defines integrity issues as “degraded performance” that the MCS cannot predict. This paper explains current error measures used by the MCS to monitor integrity, the criteria and response to satellite anomalies, and what actions have been developed and will be implemented in the next year to minimize the impact of integrity anomalies on the User Segment. This paper reviews short-term projects at the MCS to improve signal and data integrity which will be completed within the next year. Many projects are in the design phase, moving from ideas on paper to actual capability, and the user community should know to what degree the integrity of their signal is being protected.
Published in:	Proceedings of the 6th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1993) September 22 - 24, 1993 Salt Palace Convention Center Salt Lake City, UT
Pages:	465 - 474
Cite this article:	Shank, Christopher M., Lavrakas, John, "GPS Integrity: An MCS Perspective," Proceedings of the 6th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1993), Salt Lake City, UT, September 1993, pp. 465-474.
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