The coherence value ranges between 0 (incoherence or noise) and 1 (completely coherent signal).
It is a function of systematic spatial decorrelation, natural image decorrelation, and additive noise.
Therefore, pixels that are highly coherent will have nominal decorrelation and nominal noise. The
two major purposes of coherence data are:
• To determine the quality of the interferometric phase measurement. InSAR pairs with low
coherence cannot be used for deriving reliable phase measurements.
• To extract thematic information related to surface features and their temporal changes.
The purpose ...
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