A Study on a New EGNOS V2 Release with Enhanced System Performances

F. Bauer, G. Greze, F. Haddad, A. Tourtier, B. Rols, K. Urbanska

Abstract:	The European Geostationary Navigation Overlay Service (EGNOS) is the European SBAS satellite navigation system that currently augments the US Global Positioning System (GPS) and provides its service over most of Europe and beyond. Since EGNOS Safety of Live service has been officially declared available for aviation in March 2011, the system is useable for the safety-critical task of guiding aircraft vertically and horizontally during landing approaches. For aeronautical users EGNOS currently offers both En Route / Non Precision Approach and APV-1/LPV200 Precision Approach services. Apart from the suitability for safety critical applications such as aviation or maritime users, the system also provides accuracy service for nonsafety of life applications such as farming. The EGNOS augments GPS with geostationary satellites that broadcast GPS-like signals containing integrity information and wide area differential corrections, derived in a ground segment of the system and applicable to the navigation signals of the GPS satellites. EGNOS integrity corrections allow aircrafts to perform safe landing approaches with horizontal and vertical guidance without airports ground equipment need and improve current GPS services accuracy from about 15m to less than 1m in the service zone. A study has been carried out for a new EGNOS V2 system release with significant evolutions among which new RIMS generation for improved signal quality monitoring capabilities, deployment of additional RIMS sites and major navigation algorithms improvement are planned in near future. These evolutions should allow to significantly enhance the performance and the robustness of the EGNOS services. This paper describes first the main design evolutions assessed in the frame of this study: update and increase of the ground station (RIMS) network and navigation algorithms robustness improvement. Then, a focus is made on the performance improvements expected both under nominal and severe ionosphere conditions with these system evolutions.
Published in:	Proceedings of the 32nd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2019) September 16 - 20, 2019 Hyatt Regency Miami Miami, Florida
Pages:	902 - 919
Cite this article:	Bauer, F., Greze, G., Haddad, F., Tourtier, A., Rols, B., Urbanska, K., "A Study on a New EGNOS V2 Release with Enhanced System Performances," Proceedings of the 32nd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2019), Miami, Florida, September 2019, pp. 902-919. https://doi.org/10.33012/2019.16944
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