高分三号卫星影像制作DEM的试验The experiment of making DEM by GF3 Satellite Images
杨珍;孙鹏超;谢青;张文军;叶凯;
摘要(Abstract)：
针对很多地区受天气影响无法采用国产光学立体像对制作DEM的问题,基于高分三号(GF3)卫星西安地区的影像,利用InSAR技术,采用"基于块的自适应于不同相干性特性的滤波方法""大规模并行单基线相位解缠",获取高精度的DEM,并从LiDAR点云中提取检测点,对DEM的精度进行检测。理论分析和处理结果表明:针对QPSI模式的GF3影像,相干系数约大于0.8的大范围区域才可满足生产1∶25 000、1∶50 000 DEM的要求;研究区山地起伏较大,影像获取时间是2017年的5—6月,植被比较茂盛,有较大的干涉相位噪声,DEM的精度受到很大影响。"基于块的自适应于不同相干性特性的滤波方法"对不同相干性区域均有较好的滤波效果;"大规模并行单基线相位解缠"保证了局部解和全局解的一致性,并行比例高。针对高分三号影像的特点,制定流程化的生产方案,为后续DEM的批量生产提供了作业依据。
关键词(KeyWords)： 高分三号;InSAR;DEM;相干系数;精度
基金项目(Foundation): 地理信息工程国家重点实验室开放基金项目（SKLGIE2015-M-2-4）
作者(Authors): 杨珍;孙鹏超;谢青;张文军;叶凯;
DOI: 10.16251/j.cnki.1009-2307.2020.03.009
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