雷达探测仪对月球次表层结构的探测模拟方法

发布时间：2018-03-25 18:11

本文选题：雷达探测仪　切入点：月表层结构　出处：《中国科学:地球科学》2010年04期

【摘要】：在月球探测中,星载高频雷达探测仪(HF Radar Sounder)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.电磁波在月球分层结构内散射与传播的建模与模拟,对于从雷达探测仪回波中提取微弱的次表面天底点回波,获取次表层结构信息等有重要的意义.本文基于粗糙面散射的Kirchhoff近似与几何光学射线追踪,提出月球分层结构雷达探测回波的模拟方法.根据月球表面地形特征,由规则三角形网格对月表面地形进行数值剖分,数值计算月球表面与次表层面的雷达回波,模拟绕月飞行的星载雷达探测仪对月球表面与次表层结构的探测图像,分析月球表面特征性物理参数对回波的影响.本文所述方法也可以应用到火星等其他外星球次表层结构的探测中.
[Abstract]:In lunar exploration, HF Radar Sounder, a spaceborne high frequency radar detector, detects the layered structure of the moon by the echo delay difference and intensity of the bottom point and the subsurface point of the lunar surface. The modeling and simulation of the scattering and propagation of electromagnetic waves in the layered structure of the moon. It is of great significance to extract weak subsurface bottom-point echo from radar detector echo and obtain subsurface structure information. The Kirchhoff approximation based on rough surface scattering and geometric optical ray tracing are used in this paper. In this paper, a simulation method for lunar layered radar to detect echo is proposed. According to the characteristics of lunar surface topography, the lunar surface topography is numerically dissected by regular triangular meshes, and the radar echo of lunar surface and sub-surface is numerically calculated. Images of the lunar surface and subsurface structures detected by a spaceborne radar detector that simulates lunar flight, The influence of the characteristic physical parameters of the lunar surface on the echo is analyzed. The method presented in this paper can also be applied to the exploration of the subsurface structure of other outer planets such as Mars.
【作者单位】：复旦大学波散射与遥感信息教育部重点实验室;
【基金】：国家自然科学基金重点项目(批准号:40637033)资助
【分类号】：P184.5

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