I’ve been processing S1GRD data and faced with a problem. I used an external DEM saved in my PC for terrain correction. When I run it, it pops out a window looking as follows:
The external DEM is a-90m SRTM-DEM with Geographic (Latitude/Longitude), WGS84, and EPSG:4326. The DEM data is not a zip file. It’s in its Geotiff (.tif) file format.
I’ve tried to use the DEM auto-download option for both the 30m and 90m DEMs; in fact, it was my first option to use the auto-download DEM option. However, when it completes downloading the DEM, it redownloads it indefinitely again and again without completing the output of the terrain-corrected S1 GRD. I don’t know the reason why it became like this.
I’ve tried it. It popped out the same error message, as in my first post, after I ran the RDTC module.
Recently, the SNAP development team has released a new SNAP version (SNAP v8.0). I’ll try to download and install this latest version of SNAP. The problem might be fixed in this version.