An Experimental Health Monitoring Unit for GPS and GLONASS

Bernd Eissfeller, A. Jansche, M. Haunschild and N. Niklasch

Abstract:	An Experimental Health Monitoring Unit (HMU) for GPS and GLONASS is developed in contract to the European Space Agency. The purpose of the HMU is to provide timely warnings to the navigation users if the satellite navigation systems should not be used for navigation. The monitoring unit is a key element in the integrity channel concept of a civil overlay NAVSAT (Refs. 1, 2) to GPS and GLONASS. The most stringent requirements are those of civil aviation: In the nonpre- cision approach phase horizontal position errors ex- ceeding the 600m SPE threshold have to be reported within 10 seconds. The concept of the HMU is to use a GPS receiver as well as a GLONASS receiver in a known location in order to detect large pseudorange errors and to identify the malfunctioning satellites. This means that the station is able to work autonomous. But it will also provide pseudorange errors compatible with the american RTCA SC-159 approach and for a future wide area DGPS system. Keywords: Integrity monitoring, NAVSAT, GPS and GLONASS
Published in:	Proceedings of the 5th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1992) September 16 - 18, 1992 Albuquerque, NM
Pages:	207 - 212
Cite this article:	Eissfeller, Bernd, Jansche, A., Haunschild, M., Niklasch, N., "An Experimental Health Monitoring Unit for GPS and GLONASS," Proceedings of the 5th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1992), Albuquerque, NM, September 1992, pp. 207-212.
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