基于次表层雷达技术的小天体结构层析成像  

Internal Structure Tomography of Asteroid Based on Subsurface Penetrating Radar

作　　者：王玉军 刘涛 宋晓骥 黄春琳[1] 郑适 何志华 刘瑞冬[2] WANG Yujun;LIU Tao;SONG Xiaoji;HUANG Chunlin;ZHENG Shi;HE Zhihua;LIU Ruidong(College of Electronic Science and Technology,National University of Defense Technology,Changsha 410073,China;Xi’an Branch,China Academy of Space Technology,Xi’an 710100,China)

机构地区：[1]国防科技大学电子科学学院,湖南长沙410073 [2]中国空间技术研究院西安分院,陕西西安710100

出　　处：《雷达科学与技术》2023年第2期184-188,198,共6页Radar Science and Technology

基　　金：国家自然科学基金(No.61901501,62001488)。

摘　　要：小天体内部结构探测是深空探测的重要课题,利用次表层探测雷达技术可以实现小天体浅表层探测和全球内部结构探测。本文面向轨道器环绕小行星进行次表层雷达穿透成像探测的场景,提出一种次表层雷达环绕扫描层析成像方法,针对洋葱状分层结构小天体模型,通过对不同地质层面结构交界的反射波进行滤波反投影重建,实现了对小天体内部结构的成像。文章基于时域有限差分方法的数值仿真和微波暗室测量数据进行了实验,验证了反射式层析方法的有效性。Detecting the internal structure of asteroid is an important subject of deep space exploration,subsurface penetrating radar technology can be applied to detect subsurface and global interior structure of asteroid.Aiming at the scene of detecting the internal structure of asteroid by orbiter⁃based subsurface penetrating radar,a tomography method is proposed.For onion shell asteroid,applying the filtered back⁃projection(FBP)algorithm to the reflected waves from the interfaces of different internal layers can reconstruct the internal structure of asteroid.The results of numerical simu⁃lation based on finite difference time domain(FDTD)and microwave anechoic chamber experiment verify the effectiveness of reflective tomography method.

关 键 词：次表层探测雷达 小天体 层析成像 暗室实验 

分 类 号：TN958[电子电信—信号与信息处理]