Compute Coherence (Image Analyst)

ArcGIS Pro 3.4 | | Help archive

Available with Image Analyst license.

Summary

Computes the similarity between the reference and secondary input complex radar data.

The output is a coherence raster with a value range of 0 to 1 in which 0 indicates no coherence and 1 indicates perfect coherence. A value of 0.3 or above is considered a good coherence value.

Usage

  • The inputs must be a pair of coregistered complex radar datasets.

  • The output coherence raster can be used for coherent change detection. The output coherence raster can be used in InSAR and DInSAR workflows to assess the reliability of the interferogram pixels.

    For InSAR and DInSAR applications, the input radar data must have the same satellite geometry.

  • In the Geoprocessing pane, the Range Window Size and Azimuth Window Size parameters include information about the estimate size required to create an approximate square pixel for the Input Radar Data parameter value.

Parameters

LabelExplanationData Type
Input Reference Radar Data

The input reference complex radar data.

Raster Dataset; Raster Layer
Input Secondary Radar Data

The input secondary complex radar data.

Raster Dataset; Raster Layer
Output Radar Data

The output coherence radar data.

Raster Dataset
Polarization Bands
(Optional)

The polarization bands that will be corrected.

The first band is selected by default.

String
Range Window Size
(Optional)

The range window size in pixels.

The default value is 10.

Long
Azimuth Window Size
(Optional)

The azimuth window size in pixels.

The default value is the minimum number of pixels required to create an approximate square window. For example, if the Range Window Size parameter value is 10, the default will be 3.

Long

Licensing information

  • Basic: Requires Image Analyst
  • Standard: Requires Image Analyst
  • Advanced: Requires Image Analyst

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