延安新区地表垂直形变时空演化的经验正交函数分析  

Spatial and Temporal Evolution of Vertical Deformation of the Ground Surface in Yan’an New Area Using Empirical Orthogonal Function

作　　者：孙宇超 魏长寿 张明刚 李志进 周立人 SUN Yuchao;WEI Changshou;ZHANG Minggang;LI Zhijin;ZHOU Liren(College of Geodesy and Geomatics,Shandong University of Science and Technology,579 Qianwangang Road,Qingdao 266590,China;School of Mining and Coal,Inner Mongolia University of Science and Technology,7 Arding Street,Baotou 014010,China;State Grid Shandong Zaozhuang Electric Power Company,999 Huanghe Road,Zaozhuang 277800,China)

机构地区：[1]山东科技大学测绘与空间信息学院,青岛市266590 [2]内蒙古科技大学矿业与煤炭学院,内蒙古自治区包头市014010 [3]国网山东省电力公司枣庄供电公司,山东省枣庄市277800

出　　处：《大地测量与地球动力学》2022年第8期813-817,共5页Journal of Geodesy and Geodynamics

摘　　要：采用SBAS-InSAR技术对43景Sentinel-1A影像进行处理,获取延安新区(北区)地表形变信息,并运用经验正交函数对结果进行分解,得到研究区域的时间系数和空间分布。结果表明,延安新区(北区)的最大沉降速率为-56 mm/a,最大抬升速率为32 mm/a。从第1模态可以看出,挖方、填方是造成地表抬升和沉降的主要原因;第2模态则反映了工程建设不同时期对应的不同地表形变状态,即加速、减缓、平稳3个阶段。Using SBAS-InSAR technology to process the 43-view Sentinel-1A images to obtain the surface deformation of Yan’an New Area(north zone),we decompose the monitoring results with empirical orthogonal function analysis to obtain the time coefficients and spatial distribution of the study area.The results show that the maximum settlement rate of Yan’an New Area(north zone)is-56 mm/a and the maximum uplift rate is 32 mm/a.From the mode 1,the excavation and filling are the main causes of surface uplift and settlement.The mode 2 reflects that different periods of construction correspond to different states of surface deformation,i.e.,three stages of acceleration,slowdown,and smoothness.

关 键 词：SBAS-InSAR EOF分析 地表形变 时空变化特征 

分 类 号：P237[天文地球—摄影测量与遥感]