机载SAR斜视区域成像研究  

Studies on Airborne Squint-Looking SAR Patch-Mapping

作　　者：朱岱寅[1] 朱兆达[1] 谢求成[1] 叶少华 张昆辉 

机构地区：[1]南京航空航天大学电子工程系,江苏南京210016 [2]雷华电子技术研究所,江苏无锡214063

出　　处：《电子学报》2002年第9期1387-1389,共3页Acta Electronica Sinica

基　　金：国家自然科学基金(No.60082002);国家863计划(No.863-308-11-03-(1))

摘　　要：本文研究机载合成孔径雷达（SAR）斜视区域成像,提出在一维距离像上对地面像素逐个进行距离对准和相位补偿的运动补偿方法.该方法在完成斜地校正的同时,还能有效地改善方位聚焦并减小几何失真.用上述运动补偿方法和线性R-D成像算法,某型机载SAR在试飞实验中成功实现了斜视区域成像.The operation and processing of airborne squint-looking SAR patch-mapping is investigated. For motion compensation, we propose to perform the range alignment and phase compensation on the one-dimensional range profile in a pixel by pixel level. By the simulation, we can see that compared with the simple method that does motion compensation only according to the center of the illuminated area, the new motion compensation method not only can improve azimuthal focusing and reduce geometric distortion, but also may simultaneously realize ground projection. With the linear R-D algorithm and the proposed motion compensation method, airborne squint-looking SAR patch-mapping has been implemented successfully in a campaign. And an X-band SAR image of mountainous area of 40 degree squint angle is presented at the end of this paper.

关 键 词：机载SAR 斜视 区域成像 运动补偿 合成孔径雷达 

分 类 号：TN959.73[电子电信—信号与信息处理] TN958[电子电信—信息与通信工程]