高分三号卫星聚束SAR误差补偿成像处理技术研究  

Research on Sliding Spotlight SAR Data Imaging Technology with Error Compensation for GF-3 Satellite

作　　者：陈琦[1] 喻文勇[1] 刘国栋[1] 侯明辉[1] 王爱春[1] 姚玉林[1] 张恒 闫丽丽 

机构地区：[1]中国资源卫星应用中心,北京100094

出　　处：《航天器工程》2017年第6期80-86,共7页Spacecraft Engineering

摘　　要：从高分三号(GF-3)卫星滑动聚束成像模型和回波信号特性出发,针对滑动聚束米级高分辨率SAR聚焦对回波信号误差敏感的特点,重点对滑动聚束高分辨率成像处理算法进行了深入研究,在此基础上提出了一种结合内定标信号幅相误差补偿的滑动聚束高分辨率去斜频率变标(DCS)成像处理算法,给出了算法详细实现步骤和技术流程。利用GF-3卫星实测数据进行了处理效果验证,结果表明:结合内定标信号幅相误差补偿的DCS成像处理算法,能有效改善滑动聚束高分辨率SAR成像的图像质量,可获得更好的成像处理和聚焦效果,验证了算法的有效性。Based on the GF-3 satellite sliding spotlight imaging model and echo signal characteris-tics,according to the characteristics of the sliding spotlight meter level high resolution and highly sensitive to echo signal error,SAR focusing on the sliding spotlight high-resolution imaging algo-rithm into the deep research,this paper presents a combination of internal calibration signal am-plitude and phase error compensation of the sliding spotlight high resolution DCS imaging algo-rithm,and presents the algorithm detailed implementation steps and technical process.The measured data by using the high GF-3 satellite is processed to verify the effectiveness,the results show that the combination of internal calibration signal amplitude and phase error compensation of DCS imaging algorithm can effectively improve the image quality of sliding spotlight high-resolution SAR imaging,and imaging processing can be obtained better focusing effect and algo-rithm than traditional methods.

关 键 词：合成孔径雷达 滑动聚束 内定标 

分 类 号：TN957.52[电子电信—信号与信息处理]