模拟月球浅表层雷达波传输机理研究

新近月球卫星都搭载微波探测器，我国Chang'e-3卫星也将搭载探月雷达。但是，已知月球雷达测量结果的地质解释目前还不明确。该申请拟根据月表典型岩性的岩相和产状，以及已知电性参数，通过地面火成岩类似岩相和产状的样品采集，利用等效介质模型，模拟月表典型月壤月岩组合，研究不同岩相和产状月壤月岩组合的电性参数差异及其深度上的变化梯度。由此，开展具有粗糙界面的多层月壤月岩介质中极化雷达波传输机理研究，建立多层月壤月岩介质中极化雷达波传播方程，研究其边界条件和数值解法，并分别通过试验室和野外探地雷达试验验证。最后，应用于月球典型地区雷达数据处理分析，实现月球浅表层下界面电性参数和深度反演，从而重新认识月球卫星和月面测量的特殊雷达回波特性的地质含义和月球浅表层结构特征，重新区分和评价极地永久阴影区含水冰月壤和月面粗糙度引起的强雷达回波园极化比值，也将为我国Chang'e-3探月雷达数据处理提供科学依据

Some microwave instruments have been onboard new lunar satellites, and the moon ground penetration radar will be employed on our Chang'e-3 rover. However, it is not clear to explain some lunar radar measurements for geological application. In the proposal, based on some typical lunar rockfacies and occurances and their electrical parameters, some samples with similar rockfacies and occurances of igneous rocks on the earth are collected. And some lunar regolith and rock groups with different rockfacies and occurances are built by employing effective media model. Thus, the differences and gradient of change on the depth of their electrical parameters can be evaluated. By the simulated layered lunar regolith and rocks with rough surfaces, the mechanism of radar transfer will be studied. The equation of radar transfer can be built, including its absorbing boundary conditions and numerical solution. The results will be tested an validated by ground penetration radar (GPR) in the laboratory and field. Some luanr satellite radar data will be processed and analyzed. And lunar subsurface electrical parameters and depth will be derived. Thus, some typical radar echos can be explained for their geological application. And the water-ice in the lunar polar regolith will be re-evaluated and the high circular polaration ratios by lunar surface rough will be re-analyzed. It will be significant for the process and analysis of our moon ground penetration radar onboard the Chang'e-3 rover.