Model-based target decomposition with the π/4 mode compact polarimetry data

Abstract

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. Keywords π/4 mode compact polarimetry, mode-based target decomposition, Stokes vector, RVoG model, radar polarimetry Citation Guo S L, Li Y, Hong W, et al. Model-based target decomposition with the π/4 mode compact polarimetry data.

Polarimetric Decomposition With an Urban Area Descriptor for Compact Polarimetric SAR Data

“…(2) The decomposition method for the π/4 mode In [13], Guo et al developed a polarimetric decomposition algorithm and introduced it to the CP decomposition of the π/4 mode. We use an optimization strategy similar to the CTLR mode to reduce the negative impact of the OVS.…”

“…Where , , are the special values of , , in the case when is equal to 0. When is zero, α is equal to the original α obtained by Guo's method [13].…”

“…Cloude's − decomposition method [12] is only applicable to the CTLR mode, due to the specificity of the volume-scattering SV. Guo improved the − method and proposed a new model-based decomposition method which is applicable to the π/4 mode [13] . In this paper, these two methods are used for comparison.…”

“…The change of from 0° to 90° indicates the change of the dominant scattering mechanism from surface scattering to the volume scattering and finally to the double-bounce scattering. Similar to Cloude's approach, Guo et al [13] developed a polarimetric decomposition algorithm and introduced it to the CP decomposition of the π/4 mode. Because the SVs of the π/4 mode and the CTLR mode are different, another method of equation solution is proposed.…”

Equivalent system model for the calibration of polarimetric SAR under Faraday rotation conditions

“…Spaceborne polarimetric synthetic aperture radars (SARs) operating at long wavelengths (e.g., in the L-band and P-band) provide valuable data for several earth science applications [1][2][3]. However, observations made by such systems suffer from the effects of both polarimetric system distortions and Faraday rotation (FR).…”