Low Cost Precision INS/GPS Aided Geolocation for Real-Time Augmented Reality Systems

T. Suita

Abstract:	Augmented Reality (AR) systems that integrate real-time video with digital map data are used in many airborne surveillance applications. The availability of low-cost system components has increased the affordability of these systems for civil applications including police/fire patrol and dispatch, police pursuit, pipeline monitoring, and disaster relief. Effective airborne AR systems require accurate aircraft position and attitude data provided by a tightly-coupled INS/GPS system to achieve the geolocation objective. Urban environments present interruptions in GPS reception that drive the need for integration with inertial sensors in low flying or hovering aircraft. Aircraft motion also necessitates an integrated INS/GPS system that can provide rapid position and attitude updates needed to effectively overlay map data on an operator's constantly changing video display. The low-cost INS/GPS system solution presented here is a KVH Industries-developed continuous navigation system (CNS-5000) that incorporates proven inertial sensors and a NovAtel OEMV® GPS receiver into a rugged airborne package. The CNS-5000 utilizes GPS data to minimize errors due to drift in the inertial sensors and inertial sensor data to support the GPS by aiding in rapid position determination after satellite reacquisition. This INS/GPS system was integrated into a demonstration AR system utilizing map data that permits the identification of individual streets and other tactically significant information. The demonstration AR system was successfully operated in a helicopter providing unprecedented situational awareness to the on-board operator in an urban environment.
Published in:	Proceedings of the 2011 International Technical Meeting of The Institute of Navigation January 24 - 26, 2011 Catamaran Resort Hotel San Diego, CA
Pages:	922 - 929
Cite this article:	Suita, T., "Low Cost Precision INS/GPS Aided Geolocation for Real-Time Augmented Reality Systems," Proceedings of the 2011 International Technical Meeting of The Institute of Navigation, San Diego, CA, January 2011, pp. 922-929.
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