Polarimetric signatures of different ice types were analyzed at four radar incidence angles. The results were compared with previous studies to examine the variation of signatures with varying geophysical and SAR parameters. The study was further extended to investigate the potential of polarimetric parameters for ice type discrimination. This was done by analyzing the polarimetric signatures in one and twodimensional feature spaces and also through a combination of adopted classification algorithms.
University of Calgary
In this study, developed by PhD candidates at the University of Calgary, the classification potential of polarimetric parameters derived after Cloude–Pottier decomposition, Touzi decomposition, Freeman–Durden decomposition, normalized radar cross section measurements, phase differences, and statistical synthetic aperture radar correlation measures is evaluated by relating them to three pre-identifi ed sea ice types and wind-roughened open water.
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A combined approach that constitutes a visual inspection of estimated probability densities of the polarimetric parameters and quantitative analysis using supervised classifications is adopted. Polarimetric parameters are iteratively combined in pairs and triplets to test for their ice type discrimination potential. Sensitivity of polarimetric parameters to radar incidence angle is also examined.