不同分辨率DEM对InSAR变形监测精度的影响分析  

Analysis of the Effect of Different Resolution DEM on InSAR Deformation Monitoring Accuracy

作　　者：卢莹 颜惠庆 杨俊凯 段晓晔[3] LU ging;YAN Huiqing;YANG Junkai;DUAN Xiaoye(School of Geodesy and Geomatics,Wuhan University,Wuhan 430079,China;Shanghai Waterway Engineering Design and Consuiting Co.,Ltd.,Shanghai 200120,China;School of Environment Science and Spatial Informaties,China University of Mining and Technology,Xuzhou 221008,China)

机构地区：[1]武汉大学测绘学院,湖北武汉430079 [2]中交上海航道勘察设计研究院有限公司,上海200120 [3]中国矿业大学环境与测绘学院,江苏徐州221008

出　　处：《测绘地理信息》2018年第6期106-109,共4页Journal of Geomatics

基　　金：测绘地理信息公益性行业科研专项资助项目(201412016)

摘　　要：合成孔径雷达差分干涉测量技术具有全天时、全天候、高分辨率等优势,已经发展成为矿区开采沉陷的新型监测手段,其中以二轨差分干涉处理方法最为常见,由于该方法需借助外部数字高程模型(digital elevation model,DEM),DEM的精度将直接影响地表形变的监测精度。因此,有必要研究不同分辨率、不同精度DEM对地表变形监测的影响。实验以河北某矿为例,对比分析了不同分辨率DEM对合成孔径雷达差分干涉监测精度的影响。实验结果表明,SRTM-1比其他3种外部DEM具有更高的可靠性,更适合作为外部参考DEM。Differential-InSAR(DfnSAR)technology has the advantages of being all-day,all-weather and high resolution, etc.Now DInSAR has been a means of mining subsidence. Two pass differential interferometry methods are currently the most widely used in monitoring'mining subsidence.Be- cause the method needs external DEM,the accuracy of DEM would directly affect the monitoring accuracy of surface de- formation.Therefore,it is necessary to study the effects of different resolution and different precision DEMs of surface deformation monitoring.The experiment is based on a mine in Hebei province.The influence of different resolution DEMs on the monitoring accuracy of DInSAR is analyzed. The results show that SRTM 1has better application effect than the other three DEMs and SRTM 1is more suitable as an external reference DEM.

关 键 词：二轨合成孔径雷达差分干涉测量 数字高程模型 精度 变形监测 

分 类 号：P237[天文地球—摄影测量与遥感] P258[天文地球—测绘科学与技术]