Question about erroneous phase

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?

update: it seems that this is due to a download issue. Will verify.

ok it has been verified. some data (not all) from SciHub has crc errors. Causing problems in the interferometry process.