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选择了新疆渭库三角洲(库车县、新和县、沙雅县)为实验区,利用Ulaby和Chapp的后向散射模型分别模拟了HV极化和HH极化的入射角为20°、24°、30°、33°、37°和40°的雷达后向散射系数图像。分析了不同入射角下图像各点后向散射系数值的散点图以及统计特征,得出由于入射角度的变化,两种极化的图像后向散射系数值变化较大,其变化趋势均符合余弦函数曲线分布,且模拟SAR图像很好的保留了地面散射信息。
We chose the Weiku delta of Xinjiang (Kuche County, Xinhe County, Shaya County) as the experimental area, using the backscattering model of Ulaby and Chapp to simulate the HV polarization and HH polarization incident angle of 20 °, 24 °, 30 °, 33 °, 37 ° and 40 ° radar backscatter images. The scatter diagrams and statistical characteristics of the backscattering coefficient at different incident angles are analyzed. The results show that the values of the backscattering coefficients of the two polarizations vary greatly with the incident angle, Cosine function curve distribution, and simulated SAR images well retain the ground scattering information.