A Simple Model for Marine Radar Images of the Ocean Surface
A Simple Model for Marine Radar Images of the Ocean Surface
复制标题
海面海洋雷达图像的简单模型
DOI：
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复制
发表时间：
2015
影响因子：
4.8
通讯作者：
D. Walker
中科院分区：
文献类型：
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作者：
D. Lyzenga;D. Walker
这封信描述了一个简单的模型，从海洋表面收到的后向散射信号的水平极化海洋雷达工作在低掠射角，包括传统上使用的对数放大器在这些雷达的影响。阴影是通过几何光学占。该模型预测的平均雷达信号的距离依赖性比较以及在不同的环境条件下收集的两个海洋雷达数据集观察到的。该模型还表明，雷达信号调制（从平均值归一化的平均值的偏差）是成比例的非阴影区域的表面坡度的径向分量。这表明，直接使用海洋雷达调制数据的定量波浪观测的可能性，而不需要校准。
This letter describes a simple model for the backscattered signal received from the ocean surface by a horizontal-polarization marine radar operating at low grazing angles, including the effects of the logarithmic amplifiers conventionally used in these radars. Shadowing is accounted for via geometric optics. The range dependence of the mean radar signal predicted by this model compares well with that observed in two marine radar data sets collected under different environmental conditions. The model also indicates that the radar signal modulation (the deviation from the mean normalized by the mean) is proportional to the radial component of the surface slope in unshadowed regions. This suggests the possibility of direct quantitative wave observations using marine radar modulation data, without the need for calibration.