Question about erroneous phase

Microwave Toolbox
#1

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:

S1A_IW_SLC__1SDV_20151224T103309_20151224T103339_009183_00D39A_1C3B
S1A_IW_SLC__1SDV_20151212T103310_20151212T103340_009008_00CEA9_624B

Thank you in advance

Regards
Corse

  • UPDATE: Looking back on the i and q bands, i realise that they are zero. why is this so?
#2

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

#3

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