I want to do viewshed analysis in QGIS.
My observer points are gps satellites the actual elevations are scaled down from 35000 kms to 1500m but the positions are accurate i,e elevation and azimuth.
This I am able to do in ArcGIS Desktop with not much difficulty by defining input raster, observation points(gps satellites), surfface offset (offsetB), observer elevation i,e 1500m and offsetA (1).
How do I define the similar parameters in QGIS and what shall be the search radius (default shown as 5000)?
No output is coming in QGIS.