Detection and Analysis of Integrity Disturbances in Satellite Navigation Systems

Pawel Michalak

Abstract:	The performance requirements expected from the global navigation satellite systems (GNSS) are very high. One of the most important demands is effective integrity monitoring. The problem of integrity monitoring is very often discussed, although the complex, efficient solution still does not exist. The aim of this research was to design a system, which would be able to cope with the real-time integrity monitoring and provide a warning of any malfunction. The latter technology was created mainly to fulfill the requirements of geodetic marine surveys where high, sub decimeter, world wide precision is required in real time. Commonly used quality control algorithms can detect signal interruptions if the change in data characteristic is sudden, but often fail when interference changes the signal slowly. The proposed solution is based on a statistic quality control running in parallel with the processing algorithms which check the actual information carried by the GNSS signal. The described mechanism is supposed to be implemented at a reference station, and is based on single satellite data. This approach allows to maintain sufficient integrity level even when the number of observed satellites does not allow to compute a position. A number of practical tests proved that such a mechanism, implemented at a single reference station can successfully warn the user if the detected malfunction affects estimation of the position.
Published in:	Proceedings of the 2009 International Technical Meeting of The Institute of Navigation January 26 - 28, 2009 Disney's Paradise Pier Hotel Anaheim, CA
Pages:	986 - 992
Cite this article:	Michalak, Pawel, "Detection and Analysis of Integrity Disturbances in Satellite Navigation Systems," Proceedings of the 2009 International Technical Meeting of The Institute of Navigation, Anaheim, CA, January 2009, pp. 986-992.
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