利用机载双天线毫米波InSAR生成四川高山区DOM及DSM  

DOM and DSM generation using airborne dual-antenna millimeter-wave InSAR in high mountain area of Sichuan

作　　者：李永杰 孙中昶 韦立登[4] 高建 杨红磊[1] LI Yongjie;SUN Zhongchang;WEI Lideng;GAO Jian;YANG Honglei(China University of Geosciences,Beijing 100083,China;Aerospace Information Research Institute,Chinese Academy of Science,Beijing 100094,China;Key Laboratory of Earth Observation of Hainan Province,Sanya 572029,China;Beijing Institute of Radio Measurement,Beijing 100854,China;Nanjing University of Posts and Telecommunications,Nanjing 210003,China)

机构地区：[1]中国地质大学,北京100083 [2]中国科学院空天信息创新研究院,北京100094 [3]海南省地球观测重点实验室,海南三亚572029 [4]北京无线电测量研究所,北京100854 [5]南京邮电大学,江苏南京210003

出　　处：《测绘通报》2020年第10期31-37,共7页Bulletin of Surveying and Mapping

摘　　要：机载双天线毫米波InSAR系统具有机动灵活、轨道可变、相干性高、分辨率高、实时获取等特点,可以快速、高效、精确地获取地势陡峭、地形复杂的困难山区地带的DSM,已成为获取DSM的重要手段之一。但由于机载InSAR数据量很大,当前的数据处理能力和效率相对较低,针对这些问题,本文采用图形处理器(GPU)并行处理技术,快速、精确地进行干涉处理,提高了干涉批处理效率;采用最小平衡树的解缠算法,快速地进行相位解缠;采用尺度不变特征变换(SIFT)算法自动、快速提取条带内相邻影像之间的连接点,提高了连接点选取的精度和效率。本文选取四川省邛崃市西部高山区地带13景机载InSAR数据进行分析,生成的DOM、DSM在X、Y、H 3个方向的RMSE分别为1.839、1.464、1.997 m,满足1∶5000地形图测绘需求。The airborne dual-antenna millimeter-wave InSAR system is able to acquire DSM over difficult mountainous areas with steep or complicated topography efficiently and accurately for its flexible maneuverability,variable track,high coherence,high resolution,real-time acquisition,et al,which is one of the significant means for obtaining DSM.However,due to the large amount of airborne InSAR data,the current data processing capability and efficiency are relatively low.In response to these problems,the GPU parallel processing technology is adopted in this paper to carry out interference processing quickly and accurately,thus improving the efficiency of batch interference processing.The phase unwrapping is performed quickly based on the minimum balanced trees unwrapping algorithm.The SIFT algorithm is used to extract the tie points between adjacent images in the strip automatically and quickly,which improves the accuracy and efficiency of tie points selection.In this paper,13 scenes of airborne InSAR data in the high mountainous area of Qionglai city,Sichuan province are taken as examples for analysis.The RMSE of the generated DOM and DSM in the three directions of X,Y and H are 1.839,1.464 and 1.997 m respectively,which satisfies requirements of 1∶5000 topographic mapping.

关 键 词：机载InSAR 毫米波 高山区 数字正射影像图 数字表面模型 

分 类 号：P237[天文地球—摄影测量与遥感]