Analyses of Integrity Monitoring Techniques for a Global Navigation Satellite System (GNSS-2)

Theodor Zink, Bernd Eissfeller, Erwin Lohnert and Robert Wolf

Abstract:	A GNSS-2 has to overcome the basic deficiencies, i.e. the lack of integrity, availability, continuity and accuracy in the Signal-In-Space (SIS), of present satellite navigation systems as the U.S. Global Positioning System (GPS) and the Russian Global Navigation Satellite System (GLONASS). Thus, the European contribution to GNSS- 2 (Galileo) with the current baseline of reusing the European Geostationary Navigation Overlay Service (EGNOS) requires that the SIS provides already integrity for Category I (CAT I) precision approach and landing. The integrity of a system refers to the assurance that all functions of this system perform within the operational limits where the integrity risk is the probability of undetected failures resulting in the loss of specified accuracy. Analyses of appropriate integrity monitoring techniques for a GNSS-2 must be performed in order to demonstrate whether or not this performance requirement can be met by the proposed GNSS-2 architectures. In addition to this, these analyses have to show the advantages and limitations of these techniques as well as the achievable service integrity monitoring levels for the different integrity monitoring concepts. The paper discusses basic integrity monitoring concepts as Receiver Autonomous Integrity Monitoring (RAIM) like methods for the Galileo users and the contribution of the Galileo ground-based integrity monitoring as well as the first results of an adapted RAIM algorithm availability simulation. This discussion takes also several Galileo hybridization techniques, e.g. the combination of Galileo with other navigation systems (GPS, LORAN-C, etc.) and/or with further sensors (barometric altimeter, etc.), into account.
Published in:	Proceedings of the IAIN World Congress and the 56th Annual Meeting of The Institute of Navigation (2000) June 26 - 28, 2000 The Catamaran Resort Hotel San Diego, CA
Pages:	117 - 127
Cite this article:	Zink, Theodor, Eissfeller, Bernd, Lohnert, Erwin, Wolf, Robert, "Analyses of Integrity Monitoring Techniques for a Global Navigation Satellite System (GNSS-2)," Proceedings of the IAIN World Congress and the 56th Annual Meeting of The Institute of Navigation (2000), San Diego, CA, June 2000, pp. 117-127.
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