The "GPS Navigation Sensor System Approach" (GNSSA) Module; A High Performance GPS Receiver for All Aircraft Precision Approach Applications Including CAT-IIIb

D. Domey, J.C. Lanoue and J. Studenny

Abstract:	The GNSSA is a GPS receiver sub-assembly composed of a single printed-circuit card (PCB) which hosts two independent RF Decks; a Pentium® class processor; numerous built-in test and self-monitoring provisions. A custom interface ASIC supports a wide assortment of data interfaces, from conventional RS-232/422 with data rates exceeding 1Mbps, 9 ARINC inputs, and 5 ARINC independent and fully monitored outputs to support all precision approach applications. The GNSSA is designed to meet and exceed the airborne performance required by DO-208, DO-229C (WAAS) and DO-253A (LAAS) and any certified ground station applications such the LAAS Ground Facility GPS Signal Quality Monitoring receiver. The software is developed in ADA according to DO-178B level A, but certified to Level B initially, upgradable to level A certification in anticipation of upcoming CAT-IIIb landing applications. This paper describes in detail the GNSSA design and development to meet the needs of all safety-critical, high-performance airborne navigation applications, specifically precision approach including anticipated LAAS CAT-IIIb requirements.
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:	667 - 676
Cite this article:	Domey, D., Lanoue, J.C., Studenny, J., "The "GPS Navigation Sensor System Approach" (GNSSA) Module; A High Performance GPS Receiver for All Aircraft Precision Approach Applications Including CAT-IIIb," Proceedings of the 15th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 2002), Portland, OR, September 2002, pp. 667-676.
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