基于sbas的矿区形变监测研究.pdfVIP

40 1 Vol.40, No. 1 2011 2 Acta Geodaetica et Cartographica Sinica Feb.,2011 :1001-1595(2011) 01-0052-07 SBAS 1 1 1 2 1 尹宏杰 , 朱建军 ,李志伟 , 丁晓利 , 汪长城 1. , 410083; 2. , Ground Subsidence Monitoring in Mining Area Using InSARSBAS Algorithm 1 1 1 2 1 YIN Hongjie , ZHUJianjun , LIZhiwei , ING Xiaoli , WANG Changcheng 1. School of Info-Physics and Geomatics Engineering, Central South University, Changsha 410083, China; 2. epartment of Land Surveying and Geo-Informatics, Hong Kong Polytechnic University, Hong Kong, China Abstract : It is difficult to get robust deformation results using conventional differential InSARmethod, due to lack of enough SARimages jointly used inSAR interferometry. Small baseline subset (SBAS) InSARalgorithm is used to monitor thetemporal evolution of surface deformation in mining area. A temporal deformation sequence of Leng- shuijiang mining area of Hunan province is retrieved from InSAR phase based on virtual observation method and SBAS algorithm. The retrieved deformation sequence reveals the development and evolution of the subsidence / bowl0 of the mining area. The result demonstrates that the constraints of small spatial baseline limits the propa- gation of EMerrorand at the sametime the method of virtual observation improves theaccuracy and robustnessof deformation monitoring with InSAR. Key words : differential InSAR; small baseline subset; mining subsidence; deformation monitoring :由于使用的SAR 图像较少,缺乏多余观测,传 的 InSAR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 InSAR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 InSAR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 EM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 : InSAR; 小基线集;矿区沉降; 变形监测 :P237 :A :国家自然科学基金40974006); 湖南省国土资源厅矿