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为了研究弹道导弹助推段起始阶段的散射特性并分析各要素造成的影响,需要建立目标与环境耦合散射模型。通过引入锥形波克服粗糙面的边缘衍射;采用Dobson土壤介电模型结合高斯粗糙面来模拟土壤环境;建立目标与尾焰散射模型,根据不同温度场的等离子体浓度分析其散射特性,并给出等效模型。推导了导弹与粗糙面耦合的表面积分方程,将UV/SMCG算法拓展,求解表面积分方程,并验证了其准确性。在此基础上,研究了极化方式、导弹离地高度、土壤湿度等要素对助推段导弹双站散射系数的影响,为天波超视距雷达对弹道导弹预警提供了理论参考。
In order to study the scattering characteristics at the initial stage of the ballistic missile’s boosting section and analyze the influence of each element, a coupled model of target-environment coupling needs to be established. Dobson soil dielectric model combined with Gaussian rough surface was used to simulate the soil environment. A target and tail flame scattering model was established. The scattering characteristics were analyzed according to the plasma concentration in different temperature fields. The equivalent model. The surface integral equation coupled with the missile surface is derived. The UV / SMCG algorithm is extended to solve the surface integral equation, and its accuracy is verified. Based on this, the influence of the polarization mode, the ground clearance of the missile and the soil moisture on the scattering coefficient of the boosting stage missile is studied, which provides a theoretical reference for the early warning of the ballistic missile.