masking based on coherency before phase unwrapping

[ABraun]

@siman

1- masking interferogram based on coherency; is same (in terms of phase unwrapping quality; not processing time) before and after phase unwrapping?

coherence stays the same, but if you manage to exclude the low coherence areas before unwrapping, there will be less unwrapping errors induced by noisy interferogram parts.

@siman

2- if we want to mask low coherence regions before phase unwrapping; what is the best method?How can we do it in SNAP or any other approved solution?

Please check here: Is it the right way to create mask for phase unwrapping?