Four-Component Decomposition Method of Polarimetric SAR Interferometry Using Refined Volume Scattering Models

In this letter, a four-component decomposition method of polarimetric synthetic aperture radar interferometry (PolInSAR) using refined volume scattering models is proposed. In the proposed algorithm, the volume scattering models under the assumption of reflection symmetry are refined by employing the orientation angles. In addition, the polarimetric interferometric similarity parameter (PISP) parameter is introduced to modify the refined volume scattering models. Airborne L-band PolInSAR data are used to evaluate the performance of the method. The experimental results demonstrate that the proposed method can effectively overcome the overestimation of the volume scattering and characterize the scattering mechanisms of various terrain types.