中文摘要：

在利用实测一年平整冰厚数据和同步全极化RADARSAT-2 SAR影像、全面分析不同SAR极化参数对海冰厚度敏感度的基础上,发现Alpha角最高;从理论上证实利用两者相关性反演冰厚的可行性,将所得经验方程用于冰厚反演,其结果与实测数据吻合较好;与现有常用方法的反演结果进行对比表明,新方法误差较小;Alpha角可以用于一年平整冰厚度反演,证明全极化SAR海冰信息反演冰厚确有优势.

英文摘要：

Polarimetric scattering characteristics of synthetic aperture radar （SAR） have been recently applied to sea-ice thickness retrieval,however some features implicit in the quad-polarization SAR data have not been fully utilized.Therefore,the ability of the polarimetric characteristics responding to sea-ice thickness was explored using first-year level sea-ice thickness measurements and synchronous quad-polarization RADARSAT-2 SAR images.It is found that the alpha angle is sensitive to sea-ice thickness.Their correlation is validated theoretically,and the sea-ice thickness inverted using the empirical relations agrees well with the measurements.The errors using this approach are small compared with those by commonly used methods.The study results confirm the role of the alpha angle in year round level sea-ice thickness retrieval,and the advantage of sea-ice thickness retrieval using the information derived from quad-polarization SAR data.