摘要
嫦娥三号卫星于2013年12月2日发射,并成功着陆月球,其巡视器上搭载的测月雷达实现了首次雷达就位探测月球。基于测月雷达的探测机制,给出了两种计算月壤相对介电常数的方法,标定件标定法和双天线时延法,并通过仿真验证了两种计算方法的有效性,文中同时给出了两种计算方法存在的局限性,为后期基于嫦娥三号雷达数据进行月球次表层的介电特性反演提供了重要依据。
The Chang＇ E-3 lunar probe was launched on December 2, 2013 and successfully landed on the moon. One of its important scientific payloads, the Lunar Penetrating Radar （LPR） , is equipped on the lunar rover （Yutu） released by the Chang＇ E-3. The LPR has accomplished a first-ever on-spot radar survey of the lunar surface. In this paper we introduce the calibration method and the method of signal-delay measurement with the LPR dual-antenna receiver to measure the relative permittivity of the lunar regolith. The methods are based on the detection principle of the LPR, Using simulations we have verified the validity of the two methods. We also discuss the limitations of the two methods in the paper. Our work should serve as important basis for research of dielectric properties of the lunar subsurface based on LPR data.
出处
《天文研究与技术》
CSCD
2015年第3期306-311,共6页
Astronomical Research & Technology
基金
国家自然科学基金(11173038)资助
关键词
射电天文学
测月雷达
相对介电常数
月球
Radio astronomy
Lunar Penetrating Radar
Relative Permittivity
Moon
