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Added support for both HAE and AMSL altitude inputs - ideal for DJI RTK platforms. Your device GPS now automatically calculates the local geoid correction, so you can enter drone altitudes directly without manual conversion.
This application performs geometric line-of-sight (LoS) analysis between two elevated structures using a WGS-84 Earth ellipsoid model. It calculates the required Height Above Ellipsoid (HAE) along the straight-line path between two radio masts, accounting for Earth curvature using a mid-chord spherical approximation. Inputs: Mast A base elevation (HAE) and antenna height (AGL) Mast B base elevation (HAE) and antenna height (AGL) Geodesic distance between masts Interpolation position along the path Core computation: Linear interpolation between mast tip heights Earth curvature correction using: d(D − d) / (2Rₑ), where Rₑ = 6,378,137 m (WGS-84) Required HAE at any point along the path Outputs: Required line-of-sight height at selected distance Real-time interactive profile of Earth curvature, ground surface, and LoS chord Visual indication of relative position along the path The model is purely geometric and does not include terrain elevation data or atmospheric refraction. It is intended for engineering estimation of direct geometric visibility between fixed radio infrastructure points.