Ben
#1
I understand that SAR processing is best in areas with high coherence. I have 3 questions:
-
In SNAP, which step should the mask be applied in? Is it right after coherence map generation?
-
When it comes to masking, do i simply use something like:
if (coherence >= 0.6) then 1 else NaN ? Is 0.6 a good threshold or is it too strict?
- For unwrapping in the masked areas, is the result of the unwrapped phase also ‘NaN’ for masked areas?
Thanks!
lveci
#2
You could mask as you have done just before unwrapping although I think snaphu already handles it when you pass in a coherence band.
Ben
#3
Thank lveci, for DEM generation, do I need to apply the range-doppler terrain correction after unwrapping?
Dear Ben
Where do you use from below sentences? in Bandmath? Can you tell me how?
if (coherence >= 0.6) then 1 else NaN ?