Hello, after performing radiometric calibration and speakle filtering of a sentinel-1 image, I running Range Doppler Terrain Correction, but I can not display image, the screen looks black. I installed snap 64, 6.0 version.
I extracted the zip and processed the manifest.safe file.
Can you help me? thank you.
Maybe your area is outside the coverage of SRTM?
source: https://www2.jpl.nasa.gov/srtm/images/bin/srtm_covmap_lo.jpg
Thanks for the quick replay! the image is in Italy, so it should be covered by the SRTM
Was the image correct after the calibration and filtering?
You can check “DEM” as an addditional output to see if it is correctly downloaded. It will be part of the output product and can be viewed after Terrain Correction (although the images are empty). If the elevation is also empty, maybe SNAP cannot access the SRTM database.