Test Results and Modeling of Military GPS Landing System Guidance Quality and Availability

Ian Gallimore and Joseph Hansen

Abstract:	The Joint Precision Approach and Landing System (JPALS) program will develop two variants of GPS-based landing systems, designated Local Differential GPS (LDGPS), and Shipboard Relative GPS (SRGPS). These systems will use different GPS relative positioning methods in meeting the JPALS Guidance Quality (GQ) requirements. Each method exhibits different GQ and availability characteristics. Prior results published in the ION literature for military precision approach provide an initial evaluation of expected LDGPS and SRGPS availability as a function of guidance quality and system architecture. This paper builds on those initial evaluations and presents simulation data to support validation of modeling assumptions and conclusions; test data was anticipated but not obtained in time for publication. Further, prior results presented for kinematic methods examined only availability of the system after ambiguity selection. The relevant discussions in this paper address the availability of correct ambiguity selection for the purpose of comparing different methods.
Published in:	Proceedings of the 57th Annual Meeting of The Institute of Navigation (2001) June 11 - 13, 2001 Albuquerque, NM
Pages:	661 - 668
Cite this article:	Gallimore, Ian, Hansen, Joseph, "Test Results and Modeling of Military GPS Landing System Guidance Quality and Availability," Proceedings of the 57th Annual Meeting of The Institute of Navigation (2001), Albuquerque, NM, June 2001, pp. 661-668.
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