SAR图像质量外场试验与评估技术

摘要

SAR图像质量评估是评判SAR系统性能的关键指标,常用SAR图像质量评估参数包括目标分辨率、峰值旁瓣比和积分旁瓣比等.首先介绍了SAR图像质量评估参数的定义；其次分析了SAR图像质量评估参数测试误差,给出了单个角反射体时积分区间对积分旁瓣比的影响,以及多个角反射体时图像质量评估参数测试误差,并进一步给出了定标场地设计要求；最后介绍了SAR图像质量评估软件系统.SAR图像质量评估技术研究已在SAR系统试验中得到应用,开发的评估软件系统在SAR图像质量评估中具有一定的推广价值.%Synthetic aperture radar(SAR) image quality evaluation is the key guideline of judging SAR system capability. The common SAR image quality evaluation parameters include target resolution, peak-side-lobe ratio(PSLR) , integral-side-lobe ratio(ISLR), etc. Firstly the definitions of SAR image quality evaluation parameters are proposed. Secondly, the testing errors of the SAR image quality evaluation parameters are analyzed. The influence of integral interval on ISLR is given for a single reflector, and testing errors of the image quality evaluation parameters are given for multiple reflectors. Then the design requirements of calibration field are presented. Lastly, the SAR image quality evaluation software system is introduced. The research of SAR image quality evaluation technique has been applied in SAR system test. The evaluation software system developed has a certain value in SAR image quality evaluation.