差分干涉合成孔径雷达技术在广域滑坡动态辨识上的实验研究  

Experiment research of D-InSAR technique on identifying landslide moving in a wide area

作　　者：王桂杰[1,2] 谢谟文[1] 邱骋[1] 吴维伦[1] 黄洁慧[1] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083 [2]中国地质环境监测院,北京100081

出　　处：《北京科技大学学报》2011年第2期131-141,共11页Journal of University of Science and Technology Beijing

基　　金：国家自然科学基金资助项目(No.4972229)

摘　　要：通过ALOS卫星PALSAR传感器获得的三景合成孔径雷达(SAR)数据,利用合成孔径雷达差分干涉(D-InSAR)技术对金沙江下游乌东德水电站库区内的滑坡活动进行了详细的研究,获得研究区域内地表高精度形变位移值.将其按滑动速率及位移大小进行分级显示,清晰地表明了研究区内不同区域的地面活动位移状态,辨识出研究区内可能发生滑动和发生滑动较大的区域,从而确定了滑坡活动的风险区.对库区内正处活动状态的L1R--6号滑坡进行了详细的研究.结果表明:D-InSAR技术与全球定位系统GPS在监测整体形变和运动趋势上基本一致.对D-InSAR结果存在的单点误差进行了分析,提出了D-InSAR与GPS相融合的栅格函数误差插值消减法,提高了D-InSAR技术的监测精度.Based on three-frame synthetic aperture radar （SAR） data derived from ALOS satellite sensor PALSAR, a three-pass differential SAR interferometry （D-InSAR） technique was used to analyze landslide activities in the Wudongde Hydropower Reservoir area at lower Jinsha River, and high accuracy ground displacement values were acquired by this method. The classification of these ground displacement values by sliding velocity and displacement clearly illustrated the ground activity deformation states of various zones in the studied area were clearly obtained, determined some potential moving landslides and active landslides and identified the dangerous zones of landslides. For an active landslide numbered No.L1R-6, the deformation detected by D-InSAR analysis shows an accordance tendency with the one by global positioning system （GPS） monitoring. In the end, single-point errors which existed in the result of D-InSAR technique were analyzed and a grid function error interpolation method of D-InSAR and GPS was proposed to improve the monitoring accuracy of D-InSAR technique.

关 键 词：合成孔径雷达(SAR) 滑坡 遥感 监测 全球定位系统(GPS) 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]