Testing an Integrated INS/GPS/GPWS

Keith Sheard and Blake Lenett

Abstract:	Today’s military aircraft are often required to fly at low altitudes at day or night in all weather conditions. Pilot workload in such circumstances can be very high, making reliable and accurate navigation to be extremely important in maximizing aircraft survivability. This goal can be achieved by combining the complementary aspects of the stable and accurate navigation of a tightly coupled Inertial Navigation System (INS) / Global Positioning System (GPS) with the Terrain Referenced Navigation (TRN) of a Ground Proximity Warning System (GPWS). The fusion of data from multiple sources (inertial, GPS, radar altimeter, barometric and a terrain elevation map) results in an accurate and robust navigation solution, but also presents challenges in system testing prior to flight. This paper outlines the potential benefits of an integrated INS/GPS/GPWS, and describes how simulation techniques can be employed to validate INS/GPS/GPWS functionality.
Published in:	Proceedings of the 57th Annual Meeting of The Institute of Navigation (2001) June 11 - 13, 2001 Albuquerque, NM
Pages:	579 - 585
Cite this article:	Sheard, Keith, Lenett, Blake, "Testing an Integrated INS/GPS/GPWS," Proceedings of the 57th Annual Meeting of The Institute of Navigation (2001), Albuquerque, NM, June 2001, pp. 579-585.
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