星球次表层探测雷达回波仿真

Simulation of radar echo from sounder for planet subsurface

在中国未来的深空探测计划中,将采用天基雷达探测技术,以实现对整个星球表面次表层结构的探测。星载高频雷达探测仪通过月球表面天底点和次表面天底点的回波时延差与强度探测月球分层结构。为了获取次表层结构信息,研究了电磁波在月球分层结构内散射与传播的建模与模拟,对利用KA近似方法计算表层及次表层回波的方法进行了研究,分析了不同参数对回波的影响,最后通过仿真进行了验证。

In order to detect the subsurface structure of the entire planet surface, the space-based radar detection technolo- gy will be used in future deep space exploration program of China. Space-borne high frequency （HF） radar sounder detects the layered structure of the moon through the echoes delay inequality and intensity of the nadir from the lunar surface and subsur- face. In order to obtain the subsurface structure information, it is significative to research the modeling and simulation of the electromagnetic wave scattering and propagation in lunar layered structure. The method of calculating the surface and subsurface echo by using KA approximate method is studied, the effects of different parameters on the echo are analyzed, which finally proved by simulation.