一种机载冰川厚度探测雷达波数域成像算法  

Imaging Algorithm Based on RMA for Air Borne Glacier Penetrating Radar System

作　　者：赵博[1,2] 刘小军[1] 方广有[1] 

机构地区：[1]中国科学院电子学研究所,北京100190 [2]中国科学院研究生院,北京100049

出　　处：《数据采集与处理》2010年第3期283-288,共6页Journal of Data Acquisition and Processing

基　　金：国家"八六三"高技术研究发展计划(2008AA12Z114)资助项目;国家自然科学基金(60551002)资助项目

摘　　要：针对机载冰川厚度探测雷达传统成像方法计算量大的问题,提出了一种适用于两层传播媒质的正下视波数域(RM A)成像算法。该算法能自动补偿电磁波的折射效应,校正不同媒质中电磁波传播速度的变化。基于空间几何模型和回波信号形式,推导了雷达回波信号的二维频谱,并在此基础上给出了成像算法实现步骤及相位补偿因子,分析了运动误差的影响及其补偿方法。最后通过仿真分析验证了该算法的有效性。Based on the problem that the traditional imaging method for air borne glacier penetrating radar is time consuming,a nadir-looking range migration imaging algorithm（RMA） for two mediums is studied.The algorithm can automatically compensate the refraction of the electromagnetic wave and the propagation velocity changes in different mediums.According to the spatial geometry and the model of echo signal,the 2-D spectrum of the radar echo is proposed and the realized steps of algorithm and phase compensation factors are given.The effect of motion errors and the compensating way are presented.The imaging quality of simulation results is consistent with the theoretical value and the validity of the algorithm is demonstrated.

关 键 词：冰川探测雷达 波数域算法 机载雷达 冰川厚度 正下视 

分 类 号：TN957.5[电子电信—信号与信息处理]