利用Sentinel-1A数据监测地表形变案例分析  

A case study of how to measure surface deformation using Sentinel-1A data

作　　者：李东[1,2] 侯西勇[1,2] LI Dong;HOU Xiyong(Yantai Institute of Coastal Zone Research,Chinese Academy of Sciences,Yantai 264003,China;Key Laboratory of Coastal Environmental Processes and Ecological Remediation,Chinese Academy of Sciences,Yantai 264003,China)

机构地区：[1]中国科学院烟台海岸带研究所,山东烟台264003 [2]中国科学院海岸带环境过程与生态修复重点实验室,山东烟台264003

出　　处：《测绘通报》2020年第3期118-122,共5页Bulletin of Surveying and Mapping

基　　金：中国博士后科学基金资助项目(2019M652487);中国科学院海岸带环境过程与生态修复重点实验室(烟台海岸带研究所)开放基金(2018KFJJ05);中国科学院战略性先导科技专项(XDA19060205)。

摘　　要：雷达卫星结合InSAR技术已广泛应用于高精度地表形变监测领域。本文选取2017年九寨沟地震为研究案例,利用Sentinel-1A地震前后的单视复数影像,基于D-InSAR技术获取该次地震的同震形变场。结果显示:震中西北侧表现出相对均匀的下沉现象,沉降漏斗区雷达视线向最大沉降量达25.1 cm;东南侧呈现不均匀抬升状态,地表破碎较为明显,最大抬升量为11.6 cm。研究表明基于Sentinel-1A数据的D-InSAR技术可以为地震形变场的定量分析提供一种快速有效的手段,为阐释地震发震机理及评估受灾情况提供必要的数据支撑,具有广阔的应用前景。Radar satellites combined with In SAR technology have been widely used in the field of high-precision surface deformation monitoring. In this paper,Sentinel-1A single look complex images,before and after the Jiuzhaigou Ms 7. 0 earthquake are chosen to derive the seismic deformation field using the D-InSAR method. The results show that the northwest side of the epicenter displays a relatively uniform subsidence. In the subsidence funnel area,the maximum settlement is 25.1 cm in the line of sight direction. While in the southeast side of the epicenter,the broken surface shows an uneven uplift,and the maximum lifting amount is 11. 6 cm. The research shows that based on Sentinel-1A data,the D-InSAR technology can provide a fast and effective means for the quantitative analysis of seismic deformation field. It can provide necessary information for explaining the earthquake mechanism and assessing the disaster situation. There would be broad application prospects in the field of surface deformation survey in the future.

关 键 词：Sentinel-1A D-INSAR 地表形变 九寨沟 地震 

分 类 号：P22[天文地球—大地测量学与测量工程]