Sensitivity of Category I Precision Approach Availability to Ionospheric Monitoring

James DiLellio, Phuong Peggy Tran and John Angus

Abstract:	The performance of a GPS augmentation system supporting Category I (CAT I) Precision Approach (PA) service availability is highly dependent on the selection of Ionospheric Grid Points (IGPs) and satellite mask. By defining the IGP grid mask and minimum satellite elevation angle, this paper provides the criteria necessary to achieve various levels of PA CAT I availability. Together with bounds on User Differential Range Error (UDRE) and User Ionospheric Vertical Error (UIVE) developed in [2], these criteria provide a useful foundation in GPS augmentation system design.
Published in:	Proceedings of the 2000 National Technical Meeting of The Institute of Navigation January 26 - 28, 2000 Pacific Hotel Disneyland Anaheim, CA
Pages:	66 - 72
Cite this article:	DiLellio, James, Tran, Phuong Peggy, Angus, John, "Sensitivity of Category I Precision Approach Availability to Ionospheric Monitoring," Proceedings of the 2000 National Technical Meeting of The Institute of Navigation, Anaheim, CA, January 2000, pp. 66-72.
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