On the Importance of GPS Anti-Jam Capability in the Tradeoff of INS Accuracy vs. GPS Complexity

Stephen Rounds

Abstract:	In the effort to provide the most effective tactical weapon system for the lowest cost, the designers of an integrated GPWInertial Navigation System (GPWINS) must weigh the relative advantages of high accuracy inertial components with those of a GPS with high anti-jam (A/J) capability. This paper delineates the technical components of this tradeoff through the GPS satellite acquisition, mid- course, and terminal phases of typical scenarios. The existence of jamming threats poses unique problems in each of these phases, and the effect on the tradeoff with inertial system accuracy is examined for each phase individually. Simply stated, a high accuracy inertial system may not require a high A/J GPS, while the addition of such a GPS subsystem allows the use of a lower accuracy inertial set. It is found that for a given set of mission requirements, substantial relaxation in the inertial system requirements can be realized for relatively modest increases in the GPS A/J capabilities.
Published in:	Proceedings of the 1995 National Technical Meeting of The Institute of Navigation January 18 - 20, 1995 Disneyland Hotel Anaheim, CA
Pages:	693 - 698
Cite this article:	Rounds, Stephen, "On the Importance of GPS Anti-Jam Capability in the Tradeoff of INS Accuracy vs. GPS Complexity," Proceedings of the 1995 National Technical Meeting of The Institute of Navigation, Anaheim, CA, January 1995, pp. 693-698.
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