广东工业大学学报

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Sentinel-1数据在极化时序InSAR技术中的适用性分析

黄恒威1, 吴希文2, 王华2   

  1. 1. 广东工业大学 信息工程学院, 广东 广州 510006;
    2. 广东工业大学 土木与交通工程学院, 广东 广州 510006
  • 收稿日期:2023-07-10 出版日期:2024-05-25 发布日期:2024-05-25
  • 通信作者: 吴希文(1983-),男,教授,博士生导师,主要研究方向为InSAR与地表形变监测,E-mail:hayman.ng@foxmail.com
  • 作者简介:黄恒威(1999-),男,硕士研究生,主要研究方向为InSAR与地表形变监测,E-mail:154898503@qq.com
  • 基金资助:
    国家自然科学基金资助面上项目(42274016)；广东省林业科学数据中心(2021B1212100004)；广东省自然科学基金(2021A1515011483)

An Applicability Analysis of Sentinel-1 Data in Polarization Time-series InSAR Technology

Huang Heng-wei1, Ng Alex Hay-Man2, Wang Hua2   

  1. 1. School of Information Engineering, Guangdong University of Technology, Guangzhou 510006, China;
    2. School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, China
  • Received:2023-07-10 Online:2024-05-25 Published:2024-05-25

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摘要： Sentinel-1数据已经被广泛地应用于时序InSAR(Time-series Interferometric Synthetic Aperture Radar, TS-InSAR) 技术。为了分析Sentinel-1双极化数据在极化时序InSAR (Polarimetric Persistent Scatterer Interferometry, PolPSI) 技术中的适用性,本文基于47景Sentinel-1双极化影像，利用TS-InSAR技术和PolPSI技术对深圳市和中山市进行了地表形变监测。结果表明，使用了Sentinel-1数据的PolPSI技术可以通过分析像元的极化信息(散射机制或统计特性) 得到更多永久散射体(Persistent Scatterer, PS) 候选点；PolPSI技术在参考网络弧上的平均时间相干性较低，但该技术可以提供更多的高质量弧(时间相干性大于0.6)；PolPSI技术提高了城市地表监测中PS观测点的密度。综上所述，与TS-InSAR技术相比，利用了Sentinel-1数据的极化时序InSAR技术可以在城市地表提供更详细且更精确的形变监测信息。

关键词: 沉降, PolPSI, 时序InSAR, 双极化, Sentinel-1

Abstract: Sentinel-1 data have been widely applied in the Time-series Interferometric Synthetic Aperture Radar (TS-InSAR) technology. To assess the applicability of dual-polarization data from the Sentinel-1 satellite in Polarimetric Persistent Scatterer Interferometry (PolPSI) technology, based on 47 dual-polarization Sentinel-1 images, the surface deformation of Shenzhen and Zhongshan is monitored using both the TS-InSAR technology and the PolPSI technology. The results show that the PolPSI technology using Sentinel-1 data can identify a greater number of Persistent Scatterer (PS) candidates by analyzing the polarization information (scattering mechanism or statistical characteristic) of pixels. The PolPSI technology exhibits lower average temporal coherence on the reference network arc, but it can provide a greater number of high-quality arcs (with a temporal coherence greater than 0.6) . The PolPSI technology can increase the density of PS in urban surface monitoring. In summary, PolPSI technology utilizing Sentinel-1 data can provide more detailed and accurate deformation monitoring information on urban surface compared to TS-InSAR technology.

Key words: subsidence, PolPSI, time-series InSAR, dual-polarization, Sentinel-1

中图分类号: 

  • TU196
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