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GPS and eLoran Integrated Navigation for Marine Applications Using Augmented Measurement Equation Based on Range Domain

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  • Control Theory and Applications
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Abstract

Vulnerability to the interference of GPS (Global Positioning Systems) is one of the main obstacles to performing safe marine navigation. As eLoran (Enhanced Long Range Navigation), considered as the backup navigation system of GPS, has been developed specifically in several countries, the need for GPS / eLoran integrated navigation has emerged. This study represents the integrated algorithm for GPS and eLoran to overcome the vulnerability of GPS. The main research contents are as follows: a) Formula for integrated positioning of GPS / eLoran based on range domain is suggested. b) Essential ASF (Additional Secondary Factor) estimation filter to implement positioning by eLoran is presented in terms of real-time processing instead of employing ASF grid map, which should be pre-made at a local area and be distributed to marine users. c) Procedures for determining HPL (Horizontal Protection Level) are represented so that the reliability of the integrated navigation can be investigated. d) The marine test results are presented to validate the suggested methods based on the Loran-C signal. Test results show the integrated GPS and eLoran by the suggested methods can complement each other in terms of accuracy and reliability.

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Correspondence to Tae Hyun Fang.

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Recommended by Associate Editor Yingmin Jia under the direction of Editor Myo Taeg Lim. This research was supported by the project titled ‘Development of integrated R-Mode navigation system’, funded by the Ministry of Seas and Fisheries, Korea, and was supported by a grant (PES3460) from basic research program of Korea Research Institute of Ships & Ocean Engineering (KRISO)..

Tae Hyun Fang received his B.S., M.S., and Ph.D. degrees in Mechanical Engineering from Pusan National University, Busan, Korea, in 1994, 1998, and 2003, respectively. From 2004 to 2005, he was a visiting scholar at the Intelligent Transportation Research Center, Massachusetts Institute of Technology, Cambridge, United States. Since 2005, he has been with Maritime Safety and Environmental Research Division, Korea Research Institute of Ship and Ocean Engineering, Daejeon, Korea. His research interests include sensor fusion systems, PNT technology, and target tracking filter.

Youngki Kim received his B.S. and M.S. degrees from Mokpo National Maritime University, Korea, in 2008 and 2010, respectively. He is a research engineer at Korea Research Institute of Ships & Ocean Engineering (KRISO). His research interests include PNT Integrity Technology and resilient PNT systems for safety navigation.

Sul Gee Park received her B.S. and M.S. degrees from Chungnam National University, Korea, in 2008 and 2010, respectively. Her research interests include precise point positioning system and GPS/INS integrated navigation system design. Her current research interests focus on software defined radio GPS receiver and precise point positioning ambiguity resolution.

Kiyeol Seo is a principal researcher of the GNSS research center at Korea Research Institute of Ships & Ocean Engineering (KRISO). He received his B.S., M.S., and Ph.D. degrees from Mokpo National Maritime University, Korea, in 1995, 1998, and 2003, respectively. He has been involved in the development of enhance Loran (eLoran) System. His research interests include resilient PNT system and integrity monitoring, GNSS-R, and precise positioning technology for maritime applications.

Sang Hyun Park is a principal researcher of the GNSS research center at the Korea Research Institute of Ships & Ocean Engineering (KRISO). He received his B.S., M.S., and Ph.D. degrees from Chungnam National University, Korea, in 1994, 1996, and 2002, respectively. He had worked as a senior research engineer at Automotive Electronic R&D Center for Hyundai-Kia Motors. He has been involved in lots of radio navigation-related research projects such as a vessel berthing system using GPS, DGNSS reference stations and integrity monitors, and eLoran system, etc. His current research interests focus on resilient PNT systems for e-Navigation.

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Fang, T.H., Kim, Y., Park, S.G. et al. GPS and eLoran Integrated Navigation for Marine Applications Using Augmented Measurement Equation Based on Range Domain. Int. J. Control Autom. Syst. 18, 2349–2359 (2020). https://doi.org/10.1007/s12555-019-0287-y

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