CAJ | 학술논문

HJ-1-C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-1-C 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-1-C 卫星的实际数据实验结果表明：HJ-1-C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。
HJ-1-C위성시아국제1과민용합성공경뢰체위성，구유조대화소묘량충공작모식。해문근거HJ-1-C 위성ScanSAR모식적공작특점，재ECS성상산법화전통사거다보륵정위방법기출상，제출일충괄용우ScanSAR적등효RD궤하교정방법。수선근거방위시각관계진행방위병접，연후근거사거관계병접각개자대，접착의합등효삼수，진행사거다보륵정위，최후실현 ScanSAR 도상적궤하교정。HJ-1-C 위성적실제수거실험결과표명：HJ-1-C위성ScanSAR모식적정위정도가이체도100 m；24핵CPU병행정황하실현10 s처리완일경도상。
HJ-1-C satellite is the first Synthetic Aperture Radar (SAR) satellite for civilian use in China, and it has a strip and scan mode. According to the characteristics of the ScanSAR of the HJ-1-C satellite, a geo-correction algorithm based on an equivalent RD model has been outlined in this paper on the basis of an ECS image processing algorithm and a traditional Range-Doppler location method. An azimuth mosaic was presented by a time series relationship, then the different burst was stitched by range, and the equivalent parameters were fitted to locations on the RD model. Finally, the ScanSAR image was geo-corrected. The HJ-1-C satellite data results showed that the location accuracy of ScanSAR for the HJ-1-C satellite was less than 100 m, and the geo-correction algorithm was realized in 10 s in fewer than 24 parallel cores.