Because of repeated GPS jamming attacks from North Korea, the Republic of Korea has had many problems in telecommunications and transports. The Republic of Korean government realizes the necessity of a complementary radio navigation service and recently decides to operate the Korean eLoran system. eLoran system is a low frequency and a high-power terrestrial radio navigation system based on a number of transmission stations. The eLoran system is an independent, dissimilar, complement to GNSS(Global Navigation Satellite System). The General Lighthouse Authorities of the UK and Ireland(GLAs) have been providing their prototype eLoran trial service since 2007 and plan to install FOC(Full Operational Capability) services covering all major ports in UK and Ireland.
The paper studies the optimized location of eLoran stations based on the coverage and accuracy simulation results, which is the best configuration in the Republic of Korea. According to the configuration of 5 stations Pohang, Kwangju, Ulleung, Baengnyeong, and Jeju, the paper also calculates GRI(Group Repetition Interval) to operate eLoran system without the interference of neighboring country’s Loran signal.