Change Detection in Dual Polarization Sentinel-1 Data with Wilks’ Lambda

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When the covariance matrix formulation is used for multi-look polarimetric synthetic aperture radar (SAR) data, Wilks’ Lambda can be used for change detection between acquisitions at two time points. We briefly describe the theory for dual polarization, diagonal only data. A case study illustrates the
technique on Sentinel-1 C-band data covering the international Frankfurt Airport. We successfully detect change including direction of change in the sense that Wilks’ Lambda shows whether radar signal increases or decreases over time.
Original languageEnglish
JournalIEEE Geoscience and Remote Sensing Letters
Number of pages5
Publication statusPublished - 2021

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  • Complex covariance matrices
  • Generation of complex Wishart distributed matrices
  • Beta distribution approximation
  • Dual polarization
  • Remote sensing change detection
  • Sentinel-1


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