Preliminary Results of Polarimetric Characteristics for C-band Quad-Polarization GB-SAR Images Using H/A/alpha Polarimetric Decomposition Theorem

The main objective of this study is to analyse the polarimetric characteristics of the various terrain targets by ground-based polarimetric SAR system and to confirm the compatible and effective polarimetric analysis method to reveal the polarization properties of different terrain targets by the GB-SAR. The fully polarimetric GB-SAR data with HH, HV, VH, and VV components were focused using the Deramp-FFT (DF) algorithm. The focused GB-SAR images were processed by the H/A/alpha polarimetric decomposition and the combined H/alpha or H/A/alpha and Wisahrt classification method. The segmented image and distribution graphs in H/alpha plane using Cloude and Pottier's method showed a reliable result that this quad-polarization GB-SAR data could be useful to classified corresponding scattering mechanism. The H/alpha-Wishart and H/A/alpha-Wishart classification results showed that a natural media and an artificial target were discriminated by the combined classification, in particular, after applying multi-looking and the Lee refined speckle filter.