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In this paper, model-based(surface, dihedral and volume scattering) target decomposition technique is proposed to decompose the π/4 mode compact polarimetric radar data. A general relationship between fully polarimetric coherence matrix and the Stokes vector of the π/4 mode compact polarimetric data is first established. Based on the Stokes vector, a proposed algorithm to retrieve the power of three scattering mechanisms is given in details. We validate this algorithm with L-band AIRSAR, San Francisco Bay, and results of decomposition are discussed and assessed in detail by being compared with the quad-pol Freeman-Durden decomposition results. Finally, the π/4 mode decomposition is compared with the CTLR(circular transmitting and linear reeving) mode, and with the π/4 mode m- δ targets decomposition. The comparison results are analyzed and discussed in detail.
A general relationship between fully polarimetric coherence matrix and the Stokes vector of the π / 4 mode Based on the Stokes vector, a proposed algorithm to retrieve the power of three scattering mechanisms is given in details. We validate this algorithm with L-band AIRSAR, San Francisco Bay, and results of decomposition are discussed and Finally, the π / 4 mode decomposition is compared with the CTLR (circular transmitting and linear reeving) mode, and with the π / 4 mode m- δ targets decomposition. The comparison results are analyzed and discussed in detail.