After cropping an Sentinel-1, GRD-IW tile and applying common pre-processing steps (Orbit Correction, calibration … train correction) on it, I want to export the final result as a GeoTiff file and then read it with QGIS for other purposes.
I can read the .tif file without problem and overlay it on top of other possible layers (in this case a Sentinel-2 image) .
I wonder, what is the best way to replace those zero (black) values in a way that they become transparent (which means that Instead of a black rectangle containing the tile subset, I rather see the underlying Sentinel-2 pixels)
In particular, the question is that is there an option in SNAP during the export procedure where I can indicate that all zero values to be saved as “nan” so that I can make them transparent in QGIS?
I would appreciate any hint in this regards