Status of the Loran Recapitilization Project (the Four Horsemen and TOC)

G. K. Weeks Jr. and Mike Campbell

Abstract:	An enhanced Loran system, with Loran Data Channel, will provide increasingly accurate and available, independent 2-D positioning and Stratum 1 timing as well as GPS augmentation information packaged in a Wide Area Augmentation System (WAAS) format. Unlike WAAS, the Local Area Augmentation System (LAAS) or Nationwide/Maritime DGPS, during planned or unplanned GPS outages, enhanced Loran will continue to provide crucial positioning and timing information to the nation’s critical transportation, telecommunications and timing infrastructure. The Loran "upgrade and modernization" efforts began in 1997 at the U.S. Coast Guard Loran Support Unit following the signing of a Federal Aviation Administration (FAA)/U.S. Coast Guard (USCG) Interagency Agreement. The Loran Recapitilization Project (LRP) effort, which formally began in FY 2000, will modernize the North American Loran-C radionavigation infrastructure in order to reduce total ownership costs and better meet critical availability, accuracy, integrity and continuity requirements. Manpower intensive legacy systems are making way for systems that may enable the Coast Guard to reduce or completely eliminate personnel at the Loran Transmitting Stations, and will greatly reduce all required equipment maintenance, and eventually outsource all maintenance, operations, training, and depot repair of the entire Loran System. This paper presents the LRP’s goals of increased maintainability, lowering total ownership costs, all while better meeting required availability, accuracy, continuity and integrity. The status of major LRP subtasks is outlined below.
Published in:	Proceedings of the 58th Annual Meeting of The Institute of Navigation and CIGTF 21st Guidance Test Symposium (2002) June 24 - 26, 2002 Hyatt Regency Hotel Albuquerque, NM
Pages:	169 - 174
Cite this article:	Weeks, G. K., Jr., Campbell, Mike, "Status of the Loran Recapitilization Project (the Four Horsemen and TOC)," Proceedings of the 58th Annual Meeting of The Institute of Navigation and CIGTF 21st Guidance Test Symposium (2002), Albuquerque, NM, June 2002, pp. 169-174.
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