Assessment of EGNOS integrity from position to range domain

X. Derambure, H. Delfour, J.M. Pieplu, D. Flament and J.C. Levy

Abstract:	The EGNOS system is being developed in Europe to provide GPS and GLONASS regional augmentation services to aviation, maritime and land users. EGNOS is a major element of the European Satellite Navigation Program, which is jointly being implemented by the Commission of the European Union, the European Space Agency and EUROCONTROL. The EGNOS system, as any other Wide Area Augmentation System, relies on the broadcast of correction and integrity information in the pseudo-range domain, which are then used to provide a solution in the position domain service. The EGNOS System Performance Requirements, and in particular the integrity of the Service, are specified in the position domain. A key process in the allocation and verification of EGNOS system and sub-systems performances is therefore the relationship between the integrity of the service and the characteristics of the broadcast corrections and integrity information. This paper describes a theoretical approach on this issue and associated simulation results, as currently achieved in the frame of the EGNOS implementation phase. In particular, it identifies the major sources of non- integrity in the EGNOS service and describes in probabilistic terms the impact of non integrity in EGNOS messages on the User level integrity of Service.
Published in:	Proceedings of the 13th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2000) September 19 - 22, 2000 Salt Palace Convention Center Salt Lake City, UT
Pages:	246 - 254
Cite this article:	Derambure, X., Delfour, H., Pieplu, J.M., Flament, D., Levy, J.C., "Assessment of EGNOS integrity from position to range domain," Proceedings of the 13th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2000), Salt Lake City, UT, September 2000, pp. 246-254.
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