I am new to Snap and to this forum. I am attempting to use SNAP from the GUI for interferometric processing, but ultimately I will implement it to Python using Snappy. I have been using this tutorial as a test: https://media.asf.alaska.edu/uploads/pdf/current_data_recipe_pdfs/generate_insar_with_s1tbx_v4.1.pdf
This problem looks similar: Error in phase and coherence band at TOPSAR Correg Interferogram
However, the for me the zero phase image only appears after interferometry:
The intensity image after interferometry also looks wrong:
The coregistration looks just fine:
Only I find the phase image in the coregistered product odd, as one can clearly distinguish land from see and it should be a noisy image.
I also see a processing artefact. I have debursted and multilooked the coregistered image and the interferogram to be able to view it on my notebook.
I have tried this with two different data sets, first not following the exact instructions and then with the tutorial. I have also updated SNAP to the newest version 7. My OS is Ubuntu 18.04 LTS.