Description of Requirements Analyses to Support Development of an FAA Position on Use of GPS as a Primary Means of Navigation in Oceanic and Remote Airspace

Young Lee and James Fernow

Abstract:	The FAA recently investigated the use of GPS as a primary means of navigation in oceanic and remote airspace prior to the implementation of the Wide-Area Augmentation System (WAAS). This was done in part due to the possible anticipated shutdown of the Australian OMEGA station as well as the unreliability of the Liberia OMEGA station. The FAA goal was to use GPS equipment that complies with TSO C-129 (for supplemental use of GPS), with minimal design changes and with minimal operational restrictions imposed. The FAA and MITRE identified a candidate set of design features essential or desirable for use of GPS as a primaiy means of navigation in oceanic and remote airspace as opposed to use as a supplemental means of navigation. FAA also identified candidate operational restrictions such as dispatch requirements that could be imposed to maintain an acceptable level of safety. Within the contest of the candidate design and operational requirements. this paper analyzes risks associated with various operational scenarios based on continuity and availability of navigation and receiver autonomous integrity monitoring (RAIM) functions for oceanic operations. The analysts described in this paper were used by the FAA in their determination of a set of minimum performance and operational requirements that would permit use of GPS as a primary means of navigation for oceanic and remote operations.
Published in:	Proceedings of the 1995 National Technical Meeting of The Institute of Navigation January 18 - 20, 1995 Disneyland Hotel Anaheim, CA
Pages:	181 - 192
Cite this article:	Lee, Young, Fernow, James, "Description of Requirements Analyses to Support Development of an FAA Position on Use of GPS as a Primary Means of Navigation in Oceanic and Remote Airspace," Proceedings of the 1995 National Technical Meeting of The Institute of Navigation, Anaheim, CA, January 1995, pp. 181-192.
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