Trade Study of Improvements to the WAAS Ionospheric Integrity Function for GNSS Landing System (GLS)

Roland Lejeune, M. Bakry El-Arini, Eric Altshuler and Todd Walter

Abstract:	When first commissioned, the Wide Area Augmentation System (WAAS) will support enroute navigation, terminal area navigation, nonprecision approaches and Lateral Navigation/Vertical Navigation (LNAV/VNAV) approaches. An analysis was made to examine the feasibility of an additional service that is closer to Category (CAT) I Precision Approach called GNSS Landing System (GLS) service. This paper is focused on one part of this analysis, which dealt with possible enhancements to the ionospheric integrity function, i.e., the function that generates Grid Ionospheric Vertical Errors (GIVEs). Four design options corresponding to two system architectures and two GIVE algorithms will be briefly discussed. The initial performance results obtained for these four options will be presented.
Published in:	Proceedings of the 57th Annual Meeting of The Institute of Navigation (2001) June 11 - 13, 2001 Albuquerque, NM
Pages:	514 - 521
Cite this article:	Lejeune, Roland, El-Arini, M. Bakry, Altshuler, Eric, Walter, Todd, "Trade Study of Improvements to the WAAS Ionospheric Integrity Function for GNSS Landing System (GLS)," Proceedings of the 57th Annual Meeting of The Institute of Navigation (2001), Albuquerque, NM, June 2001, pp. 514-521.
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