GNSS Monitoring and Information Systems at Frankfurt Airport

Winfried Dunkel and Felix Butsch

Abstract:	The paper describes the various monitoring and information systems of DFS installed at Frankfurt International Airport. In a project called "SatNav Differential Station Frankfurt" a Special Category I (SCAT-I) precision landing system and a Measurement Data Recording and Data Evaluation System (MDES) were installed in 1998. The MDES is the central DFS monitoring system for the observation of GNSS related events. This system is able to send warnings to operators and maintenance staff and to provide other systems with GNSS information like satelite health information, differential cor- rections and orbital data. The almanac data for example is used by the DFS-owned RAIM Outage Prediction System. This information sys- tem provides pilots with pre-flight information on the availability of the RAIM function for the time the aircraft approaches one of about 40 German IFR airports. For some of these airports Non-Precision Approaches (NPA) based on GPS have already been established. Additionally, a GNSS Interference Monitoring System (GIMOS) is used to ensure that there are no undetected GNSS interference sources at the airport. In case of an event, an automated recording of the spectrum and the GNSS information at that time for detailed off-line analy- sis is carried out. The paper will give a short description of the three sys- tems and their main specifications. It presents the experi- ence gained so far. Furthermore, requirements for future implementation of GNSS monitoring and information sys- tems for aviation use are derived.
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:	773 - 783
Cite this article:	Dunkel, Winfried, Butsch, Felix, "GNSS Monitoring and Information Systems at Frankfurt Airport," 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. 773-783.
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