A Performance Analysis of a Tightly Coupled GPS/Inertial System for Two Integrity Monitoring Methods

Young C. Lee, Daniel G. O’Laughlin

Abstract:	Use of an integrated GPS/inertial system can be effective in mitigating the effects of GPS signal interference such as intentional jamming. Currently the GPS/Inertial Working Group of RTCA SC-159 is developing requirements and test procedures for a tightly coupled GPS/inertial system. To support this Working Group, this paper investigates two of the key issues being addressed by the Working Group. The first issue is how well a tightly coupled GPS/inertial system can detect slowly growing errors. This paper investigates this issue for two integrity monitoring methods. The other issue relates to how long the system can coast upon complete loss of GPS signals caused by interference. Using analytic formulas, this paper determines maximum coasting times possible under various scenarios.
Published in:	Proceedings of the 12th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1999) September 14 - 17, 1999 Nashville, TN
Pages:	1187 - 1200
Cite this article:	Updated citation: Published in NAVIGATION: Journal of the Institute of Navigation
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