提高海丝一号SAR影像定位精度的图像配准方法  

Image registration method for improving the positioning accuracy of HISEA-1 SAR image

作　　者：朱林红 钟若飞[1,2] 王亚 李清扬 ZHU Linhong;ZHONG Ruofei;WANG Ya;LI Qingyang(Key Laboratory of 3D Information Acquisition and Application Ministry of Education,Capital Normal University,Beijing 100048,China;College of Resource Environment and Tourism,Capital Normal University,Beijing 100048,China;College of Information Engineering,Zunyi Normal University,Zunyi 563099,China)

机构地区：[1]首都师范大学三维信息获取与应用教育部重点实验室,北京100048 [2]首都师范大学资源环境与旅游学院,北京100048 [3]遵义师范学院信息工程学院,贵州遵义563099

出　　处：《测绘通报》2023年第5期62-66,共5页Bulletin of Surveying and Mapping

基　　金：国家自然科学基金面上项目(42071444);北京成像理论与技术高精尖创新中心专项。

摘　　要：海丝一号(HISEA-1)是国内首颗对标国际先进指标的C波段商业SAR卫星,最高成像分辨率为1 m,整颗星质量小于185 kg,具有轻小型、低成本、调度灵活等优点,但是其影像产品的定位精度相对于国内外高几何精度的卫星影像,如哨兵一号(Sentinel-1)干涉宽幅模式影像产品仍有差距。本文提出了一种利用图像配准技术提高SAR影像几何精度的方法,将已知高精度地理坐标的Sentinel-1数据作为参考基准,HISEA-1 SAR数据作为待配准图像,通过完成两者之间的精确匹配,以纠正HISEA-1 SAR影像的定位精度。HISEA-1 is the first domestic C-band commercial SAR satellite bench marking with international advanced indicators.The highest imaging resolution is 1 m,and the whole satellite mass is less than 185 kg.It has the advantages of light,small,low cost and flexible scheduling.However,the positioning accuracy of the image products is still far behind that of domestic and foreign satellite images with high geometric accuracy,such as Sentinel-1 interferometric wide band mode image products.This paper presents a method to improve the geometric accuracy of SAR image by using image registration technology.Sentinel-1 data with known high-precision geographical coordinates is used as the reference datum,and HISEA-1 SAR data is used as the image to be registered.By completing the accurate matching between the two images,the positioning accuracy of HISEA-1 SAR image is corrected.

关 键 词：海丝一号 定位精度 哨兵一号 相位一致性 图像配准 

分 类 号：P237[天文地球—摄影测量与遥感]