天线扫描对TOPSAR辐射影响的校正方法  

Calibration method to the impact of antenna scanning on TOPSAR

作　　者：尹迪 韩冰 孙吉利[1,3] 赵良波 洪文 胡玉新 YIN Di;HAN Bing;SUN Jili;ZHAO Liangbo;HONG Wen;HU Yuxin(Aerospace Information Research Institute, Chinese Academy of Sciences,Beijing 100190, China;Key Laboratory of Technology in Geo-Spatial Information Processing and Application Systems, Chinese Academy of Sciences, Beijing 100190, China;University of Chinese Academy of Sciences,Beijing 100049, China;BeijingInstitute of Spacecraft System Engineering, Beijing 100094, China)

机构地区：[1]中国科学院空天信息创新研究院,北京100190 [2]中国科学院空间信息处理与应用系统技术重点实验室,北京100190 [3]中国科学院大学,北京100049 [4]北京空间飞行器总体设计部,北京100194

出　　处：《中国科学院大学学报（中英文）》2021年第6期791-799,共9页Journal of University of Chinese Academy of Sciences

基　　金：国家自然科学基金(4197060692)资助。

摘　　要：TOPSAR模式是合成孔径雷达的一种宽幅成像观测模式,其产品被广泛应用于海洋风场反演、洋流反演等定量化遥感。根据TOPSAR模式成像的特点,对经典雷达方程表达式进行适应性修正,并在此基础上提出一套适用于TOPSAR模式的辐射校正处理方法,给出一套完整的处理流程图。最后,利用国产高分三号SAR卫星的TOPSAR试验模式实测数据对文中提出的校正方法进行有效性的验证工作。TOPSAR is an earth-imaging technique which can provide wide swath coverage.Its products have been widely applied in quantitative remote sensing applications such as ocean wind inversion and ocean current inversion.Depending on TOPSAR characteristics,this paper made several adaptive corrections to the expression of classical radar equation.Based on this,several radiation calibration methods for TOPSAR were proposed,and a complete processing flowchart was given.In the end,the effectiveness of the methods was verified by using the measured data of GF-3 TOPSAR test-mode.

关 键 词：TOPSAR 辐射校正 合成孔径雷达 高分三号 处理器增益校正 

分 类 号：TN959.74[电子电信—信号与信息处理]