Performance Evaluation of eLoran Spatial ASF Corrections Based on Measured ASF Map

2025/09/30 by Yu, Jaewon, Son, Pyo-Woong
#FOS: Electrical engineering #Signal Processing (eess.SP) #electronic engineering #information engineering

paper · doi:10.48550/arxiv.2509.26018

Abstract

This paper analyzes the effectiveness of spatial ASF correction methods in the Korean eLoran system using measured ASF maps. Three correction scenarios were evaluated under identical simulation settings: no correction (S0), local correction using true ASF values (S1), and wide-area correction using a single reference station value (S2). Simulation results show that S1 consistently achieved the lowest positioning errors, while S0 exhibited the largest errors with extensive high-error regions. S2 provided limited improvements near the reference station but degraded with increasing distance and ASF spatial gradients. The findings highlight that local ASF correction significantly improves eLoran positioning performance, whereas wide-area correction has only localized benefits.

Citations

• Enhancing eLoran Timing Accuracy via Machine Learning with Meteorological and Terrain Data
• Toward High Accuracy DME for Alternative Aircraft Positioning: SFOL Pulse Transmission in High-Power DME
• Seamless Accurate Positioning in Deep Urban Area based on Mode Switching Between DGNSS and Multipath Mitigation Positioning

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