Geo-correction Algorithm Based on Equivalent RD Model for ScanSAR of HJ-1-C Satellite
Liu Jia-yin①③④ Wen Shuang-yan①③ Zhang Hong-yi①③④ Hong Wen①②③
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)
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.
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.
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. JOURNAL OF RADARS, 2014, 3(3): 361-367.
