SkyQuantLOS

SkyQuant LOS answers one question fast: from this point, at this height, what can I see? Tap anywhere on a flat map, satellite imagery or a 3D globe to place an origin. Give it an altitude, either above ground level (an antenna on a mast, an observer on a ridge) or above mean sea level (an aircraft at a fixed altitude). Choose the altitude of what you are looking for the same way: a target following the terrain, or a flight level. Set the range, up to 500 km, and compute. The visible area is drawn on the map as a 360-degree viewshed computed from 30-metre elevation data, with shadowed valleys left dark and distant peaks lit, exactly as the terrain dictates. Then tap any point inside or outside it to get a point-to-point terrain profile along the great circle: a clear or blocked verdict, the distance, where the blocking ridge is and by how much, and an interactive chart of terrain lifted by earth curvature against the straight sight line. Drag across the chart to read terrain height, line-of-sight altitude and clearance at any distance. Built for the people who need real answers: radio and RF engineers siting links and repeaters, amateur radio operators, drone and aviation planners, surveyors, search and rescue, and anyone who wants to know whether that summit is really in view.