一种复杂地物目标近垂直后向散射系数反演方法  

A near-vertical backscattering coefficient inversion method for complex ground object based on Range-Doppler image

作　　者：刘小红 经文 江舸[1] 唐高弟[1] LIU Xiaohong;JING Wen;JIANG Ge;TANG Gaodi(Institute of Electronic Engineering,China Academy of Engineering Physics,Mianyang Sichuan 621999,China)

机构地区：[1]中国工程物理研究院电子工程研究所,四川绵阳621999

出　　处：《太赫兹科学与电子信息学报》2023年第12期1423-1428,共6页Journal of Terahertz Science and Electronic Information Technology

摘　　要：复杂地物目标的近垂直后向散射特征是影响雷达高度表回波波形的重要因素之一。对近垂直后向散射系数的获取主要采用基于参数模型的实测数据拟合方法,但一般只适用于地势平坦且介质相对单一的地海面目标。本文基于机载雷达高度表,针对复杂地物目标的距离-多普勒图像仿真实验数据和实测数据,利用距离-多普勒域和地球空间域的映射关系,提出一种后向散射系数的反演算法,并对得到的后向散射系数进行定量分析。实验验证了提出的反演算法具有一定的适用性和参考性。The near-vertical backscatter characteristics of complex ground objects are one of the important factors affecting the echo waveform of radar altimeter.The measured data fitting method is adopted based on the parameter model to acquire the near-vertical backscattering coefficient,but it is only suitable for the ground and sea surface targets with flat terrain and relatively single medium.In this paper,with the mapping between Range-Doppler domain and geospatial domain,aiming to the simulation experiment data and the measured real data for airborne radar altimeter's Range-Doppler image of complex ground objects,a backscatter coefficient inversion algorithm is proposed and the obtained backscatter coefficients are quantitatively analyzed.It is verified that the proposed inversion algorithm has certain applicability and reference value.

关 键 词：后向散射系数 反演方法 距离多普勒图像 雷达高度表 

分 类 号：TN957.51[电子电信—信号与信息处理]