形变监测高分辨率InSAR数据的精度分析

Accuracy analysis of high resolution InSAR data for deformation monitoring

收集江苏高分辨率InSAR地面沉降监测结果及兴化、淮安同期水准测量资料和基岩标同期监测资料,利用79个水准点测量数据、7个基岩标(分别选取不同时段)测量数据共98个数据样本,将InSAR技术与水准测量及基岩标测量技术的监测结果进行对比发现,监测结果一致性率为86.73%,平均差值为2.08 mm,标准差为2.50 mm,最大差值为18.64 mm,表明InSAR可进行半定量形变监测,但在高层建筑、排水管线、大坝、桥梁等需高精度形变监测的工程方面仍不能替代水准测量。

By collecting the InSAR monitoring data of land subsidence in Jiangsu and the levelling data and the monitoring data of bedrock markers of Xinghua and Huai′an in the same period,this paper obtained a total of 98 data samples originating from 79 levelling points and 7 bedrock markers(selected in different periods respectively).By comparing InSAR monitoring data with levelling and bedrock marker data,this paper finds that the consistency rate is 86.73%,the mean difference is 2.08 mm,the standard deviation is 2.50 mm,and the maximum difference is 18.64 mm,indicating that InSAR can be used for semi-quantitative deformation monitoring,but it cannot replace traditional levelling for high-rise buildings,water drainage pipelines,dams,bridges and other projects requiring high-precision deformation monitoring.