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http://dx.doi.org/10.7837/kosomes.2021.27.6.815

Design of Performance Monitoring System for eLoran Time Synchronization Service  

Seo, Kiyeol (Korea Research Institute of Ships & Ocean Engineering)
Son, Pyo-Woong (Korea Research Institute of Ships & Ocean Engineering)
Han, Younghoon (Korea Research Institute of Ships & Ocean Engineering)
Park, Sang-Hyun (Maritime PNT Research Office, Korea Research Institute of Ships & Ocean Engineering)
Lee, Jong-Cheol (National Maritime PNT Office, MOF)
Publication Information
Journal of the Korean Society of Marine Environment & Safety / v.27, no.6, 2021 , pp. 815-821 More about this Journal
Abstract
This study addresses on the design of performance monitoring system for the time synchronization service of the enhanced long-range navigation (eLoran) system, which has a representative ground-wave radio broadcast system capable of providing positioning, navigation, timing and data (PNT&D) services. The limitations of time-synchronized systems due to the signal vulnerabilities of the global navigation satellite system (GNSS) are explained, and the performance monitoring system for the eLoran timing service as a backup to the GNSS is proposed. The time synchronization service using eLoran system as well as system configurations and the user requirements in the differential Loran (dLoran) system are described to monitor the time synchronization performance. The results of the designed system are presented for long-term operation in the eLoran testbed environment. As the results of time performance monitoring, we were able to verify the time synchronization precision within 43.71 ns without corrections, 22.52 ns with corrections. Based on these results, the eLoran system can be utilized as a precise time synchronization source for GPS timing backup.
Keywords
Enhanced Loran (eLoran); Time synchronization; Differential Loran (dLoran) station; Loran data channel (LDCl) corrections; Timing monitoring; GPS Backup; Coordinated Universal Time (UTC);
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