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http://dx.doi.org/10.5394/KINPR.2022.46.6.525

Analysis of LDC Message Reception Performance of Korean eLoran Pilot Service according to Modulation Methods  

Pyo-Woong, Son (Korea Research Institute of Ocean and Ships Engineering, University of Science and Technology)
Sak, Lee (National Maritime PNT Office)
Tae Hyun, Fang (Korea Research Institute of Ocean and Ships Engineering)
Kiyeol, Seo (Korea Research Institute of Ocean and Ships Engineering)
Publication Information
Journal of Navigation and Port Research / v.46, no.6, 2022 , pp. 525-529 More about this Journal
Abstract
In the eLoran system, the Loran Data Channel (LDC) is used to provide precise timing and positioning. The LDC message can be modulated with the Eurofix method, which modulates the transmission time of the 3rd-8th pulse not used for navigation, and the 9th pulse method, which modulates data using the 9th additional pulse after the existing 8 Loran pulses. In this paper, we analyzed the reception performance of the LDC message transmitted from the eLoran transmitter according to the modulation method. The eLoran testbed transmitter in Incheon was set to transmit LDC messages simultaneously with the 9th pulse modulation method and the Eurofix modulation method. Then, the LDC messages stored in the databases of the eLoran differential stations in Incheon and Pyeongtaek were analyzed in terms of the message reception rate according to the modulation method. Using the navigation aid management ship Inseong No. 1, the range of LDC message reception of actual sea users near Incheon Port was also analyzed. The results of this study are expected to be utilized in the full operational capability service after the eLoran pilot service.
Keywords
eLoran; LDC; Eurofix; $9^{th}$ pulse modulation; PNT;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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