【摘要】 针对单一轨道合成孔径雷达差分干涉测量技术(Different Interferometric Synthetic Aperture Radar,DInSAR)技术仅能获取雷达视线向(Line of Sight,LoS)的变形问题,提出了一种基于多轨道SAR影像的矿区地表三维变形动态监测与分析方法。该方法以覆盖邯郸市峰峰九龙矿区的TerraSAR、RadarSAT-2、Sentienl-1卫星3个轨道多景SAR影像数据为基础,首先采用D-InSAR技术获取3组地表视线向变形,利用插值方法将地表视线向变形规划到相同的时间间隔,获得时间间隔为6 d、17 d、39 d、50 d的3组视线向的变形值;然后根据最小二乘原理将视线向变形分解到竖直、东西、南北等方向上进行三维分析。研究表明:①与实测水准数据对比,该方法得到的竖直向沉降均方根误差仅为±2 mm,表明利用矿区地表三维变形特征分析开采沉陷规律具有可行性;②时序累积的三维变形场能够直观展示地面沉降的时空变化过程,可以进一步分析沉降中心随着观测时间推进的变化过程。更多还原

【Abstract】 In order to solve the problem that the deformation of the line of sight(LoS)can only be obtained by singletrack D-InSAR(different interferometric synthetic aperture radar)technology,a three-dimensional dynamic monitoring and analysis method of surface deformation in mining area based on multi-orbit SAR image is studied. Based on TerraSAR,RadarSAT-2 and Sentienl-1 satellite multi-view SAR image data covering Fengfeng Jiulong mining area in Handan City,this method adopts traditional D-InSAR technology to acquire three groups of ground line-of-sight deformation,and uses the interpolation to plan the ground line-of-sight deformation to the same time interval,to obtain three groups of line-of-sight deformations with a time interval of 6,17,39 and 50 days.Then,the line-of-sight deformation is decomposed into vertical,east-west and northsouth deformation by using the least square principle.The study results show that:①the root mean square error of vertical subsidence obtained by this method is only +2 mm by compared with the measured level data,meanwhile,the feasibility of mining subsidence law analyzed by using three-dimensional surface deformation of mining area is verified;②the time-series cumulative three-dimensional deformation field can visually show the spatial and temporal change process of land subsidence,and the change process of the subsidence center along with the observation time in the mining area can be clearly analyzed.更多还原