基于VV⁃VH哨兵⁃1数据的桥梁区域形变监测研究  

Research of Bridge Deformation Monitoring by Sentinel⁃1 VV⁃VH Polarized SAR Data

作　　者：杨海波 王燕 薛勇 YANG Haibo;WANG Yan;XUE Yong(Jiangsu Provincial Transportation Engineering and Construction Bureau,Nanjing Jiangsu 210000,China;Jiangsu Baisheng Information Technology Co.Ltd.,Nanjing Jiangsu 210000,China)

机构地区：[1]江苏省交通工程建设局,江苏南京210000 [2]江苏百盛信息科技股份有限公司,江苏南京210000

出　　处：《铁道建筑技术》2023年第12期90-95,共6页Railway Construction Technology

摘　　要：长时间序列永久散射体干涉合成孔径雷达(PS⁃InSAR)能高精度监测地物形变,并具有全天时、全天候的探测能力。Sentinel⁃1数据的可用性强且时间序列数据丰富,在桥梁形变监测的精细化处理中具有极大优势。由于桥梁结构的复杂性,如何提高桥梁体上的散射体点的数量、质量及计算效率是其应用过程关键问题。本文评估和比较哨兵⁃1双极化数据在提高PS⁃InSAR监测方面的能力和潜力。研究发现:相比于单极化,在引入极化信息后能更高效提取有效PS点,且计算速度快,能有效去除低散射区杂点。因此,双极化不仅能增加点密度,可观测到更多形变细节信息,而且也验证了交叉极化对于形变监测的潜力。Long time series permanent scatterer interferometric synthetic aperture radar(PS⁃InSAR)can monitor ground deformation accurately with all⁃time and all⁃weather.Sentinel⁃1 data has strong availability and rich data in time series,which has great advantages in fine monitoring of bridge deformation.Due to the complexity of bridge structures,how to improve the number,quality,and computational efficiency of scattering points on the bridge body is a key issue in its application.This article evaluates and compares the ability and potential of Sentinel⁃1 dual⁃pol data in improving the monitoring of PS⁃InSAR.The study found that compared to single polarization,the polarization information can more efficiently extract effective PS points with fast calculation speed,which can effectively remove noises in low scattering areas.Therefore,dual⁃pol not only increases point density,allowing for more detailed deformation information,but also demonstrates the potential of cross polarization for deformation monitoring.

关 键 词：哨兵⁃1数据 桥梁形变监测 极化干涉SAR PS⁃InSAR 

分 类 号：P237[天文地球—摄影测量与遥感] TN958[天文地球—测绘科学与技术]