Integrity Monitoring Strategies for GNSS Applications

Stefan Vieweg, Wolfgang Lechner

Abstract:	The use of GNSS for safety-of-live operations requires the capability of integrity monitoring. Neither GPS nor GLONASS can provide warnings to their users in short periods of time. Therefore an appropriate pro- cedure has to be developed to support the integrity monitoring function at the user level. For these purposes, a number of different proposals have been made, like RAIM with GPS or GLONASS, RAIM with combined GPS and GLONASS, use of geo- stationary satellites as overlay, use of pseudolites du- ring critical phases of operation (e.g. approach phase of an aircraft). Beside these ‘satellite-only’ methods, a combination of different types of sensors, called ‘Air- craft Autonomous Integrity Monitoring (AAIM)’ has been proposed as promising alternative. Although there is a very active discussion on this to- pic, an international accepted and standardized pro- cedure has not been accepted until today. The paper describes the different methods for in& grity monitoring, the advantages and disadvantages and will directly compare the effectiveness of various approaches.
Published in:	Proceedings of the 1994 National Technical Meeting of The Institute of Navigation January 24 - 26, 1994 Catamaran Resort Hotel San Diego, CA
Pages:	145 - 153
Cite this article:	Vieweg, Stefan, Lechner, Wolfgang, "Integrity Monitoring Strategies for GNSS Applications," Proceedings of the 1994 National Technical Meeting of The Institute of Navigation, San Diego, CA, January 1994, pp. 145-153.
Full Paper:	ION Members/Non-Members: 1 Download Credit Sign In