I am getting inconsistent results when using the Geometric --> Range Doppler Terrain Correction to obtain Gamma0 images. The input is S1A IW GRD products. Sometimes the routine works with no issues. Sometimes Gamma0 generation fails and I only get a Sigma0. No errors are reported in this case.
My internet connection is pretty good but I wonder if there is a way to check where the SRTM DEM from auto-download is stored? Is SNAP perhaps looking for a DEM file and failing once it finds that it doesn’t cover the whole scene?
Any inputs would be highly appreciated.