I processed a couple of slc images for interferometry. I used the TOPSAR IW all swath graph. However, i noticed that there was only IW1 and IW2 with valid phase data while IW3 was NaN. I noted that both swaths had the same coverage area.
Could someone please explain to me why only IW1 and IW2 contained valid interferometric data?
These are the two products:
Thank you in advance
- UPDATE: Looking back on the i and q bands, i realise that they are zero. why is this so?