1. 中国科学院电子学研究所微波成像技术国家重点实验室,北京,100190
2. 中国科学院研究生院,北京,100190
3. 中国科学院电子学研究所微波成像技术国家重点实验室北京,100190
4. 中国科学院研究生院北京,100190
网络出版:2008-09-25,
纸质出版:2008
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余 颖, 王小青, 朱敏慧, 等. 基于二阶散射的海面三尺度雷达后向散射模型[J]. 电子学报, 2008,36(9):1771-1775.
YU Ying, WANG Xiao-qing, ZHU Min-hui, et al. Three-Scale Radar Backscattering Model of the Ocean Surface Based on Second-Order Scattering[J]. Acta Electronica Sinica, 2008, 36(9): 1771-1775.
基于二阶组合表面模型和随机多尺度散射模型
本文提出一种既包含大尺度、中小尺度散射又包含二阶布拉格散射的海面雷达后向散射模型.在本模型框架下
我们推导了二阶布拉格散射的表达式
并根据弱流体动力作用理论推导出流体动力调制函数解析表达式.另外
我们通过全局和本地坐标系中观测角度的转换实现了倾斜调制.仿真结果表明该模型结果与实测数据相符
并优于前两者的模型结果.
Based on the second-order composite surface and stochastic multi-scale models
an ocean surface backscattering model was proposed
including both the large-/intermediate-/small- scale scattering and the second-order Bragg scattering.Within this frame
we derived a second-order Bragg scattering expression
and developed an analytic solution of hydrodynamic modulation function according to weak hydrodynamic interaction theory.In addition
tilt modulation was simulated through the observation angle transform between nominal and local coordinate systems.The result shows that reasonable agreement between measured and simulated data is obtained
and this model is better than the two models mentioned above.
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