@con20or Oh, nice! In this way it works, thank you!
@lveci Thank you for your answer! The fractional water mask operator works fine for me as you said ! The question about exporting full data (backscatter + wind vectors) in the same file seems to be open, nevertheless… I looked through the forum topics on wind estimation function and got that the only solution now is shell scripting (to access the wind vectors from /.snap/log/ directory) and GDAL (to deal with data outside of SNAP furthermore), right? Personally, I would prefer to have an option of saving everything in one netcdf (just as idea for future releases).