超宽带穿透成像雷达及其在探月工程中的应用

Ultra wideband penetrating imaging radar and its application in China's lunar exploration project

月球次表层结构记录了月球形成和演化的关键信息,对月球次表层结构的精细探测是我国探月工程的重要科学目标.超宽带穿透成像雷达是获取月球次表层结构的最有效技术,我国探月工程的嫦娥三号和四号探测器在国际上率先采用超宽带穿透成像雷达开展了地外天体的探测实践,并取得了重大进展.本文对超宽带穿透成像雷达采用的不同信号进行对比分析和选择,归纳探月工程中应用的超宽带穿透成像雷达的特点及其关键技术突破,并对月球次表层结构探测结果进行分析与总结,为后续任务的仪器设计和科学研究提供有益参考.

The subsurface structure of the Moon has recorded key information about the Moon's formation and evolution,therefore,precise exploration of the subsurface structure of the Moon is an important scientific goal of China's lunar exploration project.Ultra-wideband(UWB)penetrating imaging radar is the most effective technology for acquiring the subsurface structure of the Moon.China's lunar probes,Chang'e-3 and Chang'e-4,have been pioneers in employing UWB penetrating imaging radar for the exploration of extraterrestrial bodies,achieving significant advancements.This paper conducts a comparative analysis and selection of signal used by UWB penetrating imaging radar,summarizes the features of the penetrating imaging radar systems used in the Lunar exploration project and their key technological breakthroughs,and provides an analysis and summary of the subsurface detection results of the Moon.It provides valuable references for the instrument design and scientific research of subsequent missions.