Dear Sir, I have a question about the coherence threshold used to define ‘poor coherence’ areas. In my GMTSAR processing, the default threshold for poor coherence seems to be as low as 0.001, while in other InSAR software such as ICEye tools or SNAP, a coherence value below about 0.3 is usually considered poor.
Could you please explain why the threshold is set to 0.001 in GMTSAR/GMT? Is this related to how coherence is computed or scaled in this workflow, and how should this value be interpreted compared to the more common 0.2–0.3 thresholds used in other software? Any clarification on how to correctly identify and mask low‑coherence areas in GMTSAR would be very helpful for my analysis.
Dear Sir, I have a question about the coherence threshold used to define ‘poor coherence’ areas. In my GMTSAR processing, the default threshold for poor coherence seems to be as low as 0.001, while in other InSAR software such as ICEye tools or SNAP, a coherence value below about 0.3 is usually considered poor.
Could you please explain why the threshold is set to 0.001 in GMTSAR/GMT? Is this related to how coherence is computed or scaled in this workflow, and how should this value be interpreted compared to the more common 0.2–0.3 thresholds used in other software? Any clarification on how to correctly identify and mask low‑coherence areas in GMTSAR would be very helpful for my analysis.