Investigation of Common Architectures for Land- and Sea-Based JPALS

Bruce R. Peterson, Sam Pullen, Boris Pervan, Gary McGraw, Trent Skidmore and Steve Anderson

Abstract:	The Joint Precision Approach and Landing System (JPALS) has been previously developed under two distinct, but related, paths: the Shipboard Relative Global Positioning System (SRGPS) and Local Differential GPS (LDGPS) programs. The former has been oriented toward Navy Sea-Based (SB) applications and the latter toward Land-Based (LB) applications. Currently, the envisioned architectures for the two applications have some significant differences. A recent study, reported herein, examined potential architectural changes that would make these two systems more common across all land and sea applications. An important question related to SB and LB commonality is: “If the SB architecture must meet more stringent accuracy requirements than LB, then why not use the SB architecture for both?” This paper presents results to help answer this question by examining several architectural features for potential commonality. The features are: (1) use of SB kinematic carrier phase tracking algorithms for LB operations (navigation algorithm), (2) additional capabilities or applications derived from the use of a twoway data link for LB systems, (3) deferment of civil Local Area Augmentation System (LAAS) interoperability to a future add-on capability, (4) use of common equipment, specifically the same GPS antenna, anti-jam technology, and receiver, for LB and SB JPALS, and (5) implementation of the special operations (SO) capability in the future using the fixed-base and tactical LB JPALS architecture, versus developing a separate special missions system architecture. The investigation evaluated each of those five architectural features against six criteria, three of which are included in this paper. The remainder can be found in the referenced Common Architecture Evaluation Report. The paper shows how benefits arising from commonality across the JPALS program can be optimized by making appropriate decisions regarding particular architectural features.
Published in:	Proceedings of the 18th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2005) September 13 - 16, 2005 Long Beach Convention Center Long Beach, CA
Pages:	26 - 37
Cite this article:	Peterson, Bruce R., Pullen, Sam, Pervan, Boris, McGraw, Gary, Skidmore, Trent, Anderson, Steve, "Investigation of Common Architectures for Land- and Sea-Based JPALS," Proceedings of the 18th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2005), Long Beach, CA, September 2005, pp. 26-37.
Full Paper:	ION Members/Non-Members: 1 Download Credit Sign In