由于使用的SAR图像较少,缺乏多余观测,传统的DInSAR测得的形变可靠性较差。此外,受InSAR观测周期以及空间和时间基线的限制,多数情况下很难将离散的DInSAR观测连接起来,获得时间上连续的沉降场,从而揭示研究区域的沉降演化情况。运用小基线集(SBAS)技术,通过虚拟观测值的方法,对DInSAR获取的相位进行后处理,以获取冷水江矿区的沉降序列图,揭示矿区沉降漏斗的发展和演化情况。空间基线的约束有效地减弱DEM误差的影响,同时观测量的增加又提高监测结果的精度和可靠性。 更多还原
【Abstract】 It is difficult to get robust deformation results using conventional differential InSAR method,due to lack of enough SAR images jointly used in SAR interferometry.Small baseline subset(SBAS) DInSAR algorithm is used to monitor the temporal evolution of surface deformation in mining area.A temporal deformation sequence of Lengshuijiang mining area of Hunan province is retrieved from DInSAR phase based on virtual observation method and SBAS algorithm.The retrieved deformation sequence reveals the ... 更多还原