GBAS Implementation Challenges: Positive Elevation Angle Multipath and More

Gerhard Berz, Maurizio Scaramuzza, Björn Ott and Alain Geiger

Abstract:	With the ICAO Annex 10 SARPs for GNSS/GBAS published and certified systems becoming available soon, GBAS is now moving from the research environment into the realization phase. However, only limited experience exists with the implementation of GBAS in the constrained environment of a developed airport, where the ideal GBAS site – a large, open, grassy field – is practically nonexistent. In addition, GBAS presents various new levels of complexity to an Air Navigation Service Provider (ANSP) in the provision of navigation and landing services, which all need to be understood in order to successfully and safely integrate GBAS with established ANSP processes. Skyguide, the Swiss ANSP, in cooperation with local partners, is introducing operational GBAS service at Zurich International Airport (ZRH). Consequently, skyguide is considering various GBAS implementation issues, with an explicit focus on those that are immediately relevant, such as GBAS site identification, site protection and compatibility with existing airport infrastructure. This paper reports on the findings of various test campaigns with a focus on the subjects of multipath and VDB airport coverage, including an evaluation of the tools required to deal with these issues.
Published in:	Proceedings of the 15th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2002) September 24 - 27, 2002 Oregon Convention Center Portland, OR
Pages:	51 - 59
Cite this article:	Berz, Gerhard, Scaramuzza, Maurizio, Ott, Björn, Geiger, Alain, "GBAS Implementation Challenges: Positive Elevation Angle Multipath and More," Proceedings of the 15th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2002), Portland, OR, September 2002, pp. 51-59.
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