基于参数化运动补偿的地基雷达对月成像技术

地基雷达对月成像可以获得月球表面的电磁散射特性、 地形地貌特征等,可用于月球的科学研究.地基雷达对月成像技术是将合成孔径技术应用到天文探测当中,延迟多普勒技术是地基雷达天文成像应用最为广泛的技术,其关键在于运动补偿.目前,国外在地基天文雷达领域的研究上已趋于成熟,而我国正处于起步阶段.为解决地基雷达对月成像中的难点问题...

Earth-Based Radar Mapping Technology of the Moon based on parametric motion compensation

Earth-based radar mapping of the moon can obtain the electromagnetic scattering characteristics and topographic features of the lunar surface, which can be used for scientific research on the moon. Earth-based radar mapping technology of the moon is the application of synthetic aperture technology to astronomical detection. Delay Doppler technology is the most widely used technology for earth-based radar astronomical mapping, and its key lies in motion compensation. At present, foreign research in the field of earth-based astronomical radar has become mature, while my country is in its infancy. In order to solve the difficult problems in earth-based radar mapping of the moon, this paper firstly analyzes the key problems of delay Doppler mapping theory based on the geometric model of the earth-moon motion, including the mapping principle, resolution and blur problem. Next, this paper proposes a parametric motion compensation algorithm, which uses image entropy as an evaluation index to search for parameters, and uses cuckoo search algorithm to improve the efficiency of parameter search. Finally, the effectiveness of the algorithm is verified by simulation, which provides technical support for future experiments.