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http://dx.doi.org/10.5394/KINPR.2019.43.6.429

Development of the Simulation Tool to Predict a Coverage of the R-Mode System  

Son, Pyo-Woong (Korea Research Institute of Ships and Ocean Engineering)
Han, Younghoon (Korea Research Institute of Ships and Ocean Engineering)
Lee, Sangheon (Korea Research Institute of Ships and Ocean Engineering)
Park, Sanghyun (Korea Research Institute of Ships and Ocean Engineering)
Publication Information
Journal of Navigation and Port Research / v.43, no.6, 2019 , pp. 429-436 More about this Journal
Abstract
The eLoran system is considered the best alternative because the vulnerability of satellite navigation systems cannot be resolved as perfect. Thus, South Korea is in the process of establishing a testbed of the eLoran system in the West Sea. To provide resilient navigation services to all waters, additional eLoran transmitters are required. However, it is difficult to establish eLoran transmitters because of various practical reasons. Instead, the positioning with NDGNSS/AIS source can expand the coverage and its algorithm with applying continuous waves is under development. Using the already operating NDGNSS reference station and the AIS base station, it is possible to operate the navigation system with higher accuracy than before. Thus, it is crucial to predict the performance when each system is integrated. In this paper, we have developed a simulation tool that can predict the performance of terrestrial integrated navigation system using the eLoran system, maritime NDGNSS station and the AIS station. The esitmated phase error of the received signal is calculated with the Cramer-Rao Lower Bound factoring the transmission power and the atmospheric noise according to the transmission frequency distributed by the ITU. Additionally, the simulation results are more accurate by estimating the annual mean atmospheric noise of the 300 kHz signal through the DGPS signal information collected from the maritime NDGNSS station. This approach can further increase the reliability of simulation results.
Keywords
eLoran System; MF-DGNSS; Terrestrial Navigation System; Coverage Simulation; R-mode System;
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