RTCA Special Committee 159 Definition of the GNSS Integrity Channel (GIC) and Wide Area Differential GNSS (WADGNSS)

A.J. Van Dierendonck and Per Enge

Abstract:	The GNSS Integrity Channel (GIC) uses a network of ground stations at known locations to determine the status of every Global Navigation Satellite System (GNSS) satellite in view of the network. Satellite health is then broadcast to GNSS users in real time via a geosta- tionary satellite. This broadcast can also include differ- ential error estimates (or corrections) for the same GNSS satellites that are valid over a region, which may include one or more countries or continents, or an entire geosta- tionary satellite ocean region. This concept is called Wide Area Differential GNSS (WADGNSS). In addi- tion, the broadcast signal is modulated with a pseudo random noise (PRN) code that is synchronized with NAVSTAR Global Positioning System (GPS) time, so that it can be used for ranging to be part of the GNSS system. This signal design has been developed by the RTCA Special Committee 159 (SC 159) Working Group 2, whose task it is to derive the Minimum Operation Per- formance Standards (MOPS) for airborne navigational equipment using GPS augmented with the GIC. This design is being solidified and the data content and format have mostly been defined. It is the purpose of this paper to present the results of this development.
Published in:	Proceedings of the 6th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1993) September 22 - 24, 1993 Salt Palace Convention Center Salt Lake City, UT
Pages:	495 - 505
Cite this article:	Van Dierendonck, A.J., Enge, Per, "RTCA Special Committee 159 Definition of the GNSS Integrity Channel (GIC) and Wide Area Differential GNSS (WADGNSS)," Proceedings of the 6th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1993), Salt Lake City, UT, September 1993, pp. 495-505.
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