Trade-Offs in the Implementation of Integrated GPS Inertial Systems

Jerome S. Lipman

Abstract:	Is there an optimum way to tie together an inertial system with a GPS receiver? There are many proponents from various schools of thought. Some say that the receiver should only be a module embedded in the Inertial Naviga- tion System (INS) where, they claim, thebestaccuracies and certain enhancements can be obtained. Others say that it is better to have a standard Global Positioning System (GPS) receiver that can accept aiding if and when it is available. Still others say that both the receiver and the INS should be separate units and all the navigation data should be gathered and optimized with other sensor data in a mission computer. It would seem that beauty is still in the eye of the beholder. Selection of the best architecture/implementation configu- ration of the GPS-inertial system depends upon numerous issues. The final choice to be most desired by the ultimate user will depend in his weighting of these issues. This paper defines/configures different architectures which encompass these issues, particularly for military aircraft. It then constructs a tradeoff matrix which provides the framework from which the designer can select the most attractive cost- effective approach, given a specific application. The elements of the matrix cover issues ranging from size, weight, cost elements, mission performance/environment, jamming resistance, logistics, technology growth, impact of products in the military marketplace, and the ability to ime- grate with other navigation sensors.
Published in:	Proceedings of the 5th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1992) September 16 - 18, 1992 Albuquerque, NM
Pages:	1125 - 1133
Cite this article:	Lipman, Jerome S., "Trade-Offs in the Implementation of Integrated GPS Inertial Systems," Proceedings of the 5th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1992), Albuquerque, NM, September 1992, pp. 1125-1133.
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