摘要
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 flame, 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.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2008年第9期1771-1775,共5页
Acta Electronica Sinica
基金
国家自然科学基金(No.40706063)
关键词
海面
雷达后向散射
二阶散射
流体动力调制
倾斜调制
ocean surface
radar backscattering
second-order scattering
hydrodynamic modulation
tilt modulation
