| 用于HJ-1C 卫星ScanSAR 的等效RD 几何校正方法 |
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| 引用本文： | 刘佳音,温双燕,张弘毅,洪文. 用于HJ-1C 卫星ScanSAR 的等效RD 几何校正方法[J]. 雷达学报, 2014, 3(3): 361-367. DOI: 10.3724/SP.J.1300.2013.13050 |
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| 作者姓名： | 刘佳音 温双燕 张弘毅 洪文 |
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| 作者单位： | 1.(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)2.(微波成像技术国家重点实验室 北京 100190)3.(中国科学院电子学研究所 北京 100190)4.(中国科学院大学 北京 100049) |
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| 摘 要： | HJ-1C 卫星是我国第1 颗民用合成孔径雷达卫星，具有条带和扫描两种工作模式。该文根据HJ-1C 卫星ScanSAR 模式的工作特点，在ECS 成像算法和传统斜距多普勒定位方法基础上，提出一种适用于ScanSAR 的等效RD 几何校正方法。首先根据方位时刻关系进行方位拼接，然后根据斜距关系拼接各个子带，接着拟合等效参数，进行斜距多普勒定位，最后实现ScanSAR 图像的几何校正。HJ-1C 卫星的实际数据实验结果表明:HJ-1C 卫星ScanSAR 模式的定位精度可以达到100 m; 24 核CPU 并行情况下实现10 s 处理完一景图像。
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| 关 键 词： | HJ-1C 卫星 ScanSAR 模式 等效RD 模型 SAR 几何校正 |
| 收稿时间： | 2013-06-09 |
Geo-correction Algorithm Based on Equivalent RD Model for ScanSAR of HJ-1-C Satellite |
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| Liu Jia-yin,Wen Shuang-yan,Zhang Hong-yi,HONG Wen. Geo-correction Algorithm Based on Equivalent RD Model for ScanSAR of HJ-1-C Satellite[J]. Journal of Radars, 2014, 3(3): 361-367. DOI: 10.3724/SP.J.1300.2013.13050 |
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| Authors: | Liu Jia-yin Wen Shuang-yan Zhang Hong-yi HONG Wen |
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| Affiliation: | 1.(Key Laboratory of Technology on Geo-spatial Information Processing and Application System, Chinese Academy of Sciences, Beijing 100190, China)2.(National Key Laboratory of Microwave Imaging Technology, Beijing 100190, China)3.(Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China)4.(University of Chinese Academy of Sciences, Beijing 100049, China) |
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| Abstract: | HJ-1C satellite was the first synthetic aperture radar satellite for civil use in China, it had the strip and scan mode. According to the characteristics of ScanSAR of HJ-1C satellite, a geo-correct algorithm based on equivalent RD model was given in this paper on the base of ECS image processing algorithm and traditional Range-Doppler location method. First azimuth mosaic was presented by time serial relationship, then the different burst was stitched by range, the equivalent parameters were fitted to location on RD model. At last the ScanSAR image was geo-corrected. The HJ-1C satellite data results showed that the location accuracy of ScanSAR of HJ-1C satellite less than 100 m and the geo-correct algorithm was realized in 10 s under 24 cores parallel. |
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