基于双极化时序InSAR技术的地表形变监测

针对时序干涉测量(Time-series Interferometric Synthetic Aperture Radar,TS-InSAR)技术在相干性较差地区监测结果不佳的问题,从极化数据的角度对传统TS-InSAR方法进行改进。实验选取珠海市高栏港经济区作为研究区域,以47景含有垂直发射垂直接收模式(Vertical transmit and Vertical receive,VV)和垂直发射水平接收模式(Vertical transmit and Horizontal receive,VH)的双极化Sentinel-1A卫星影像作为数据源进行实验,并对实验结果进行验证分析。结果表明：采用双极化数据能够有效提高时序InSAR技术的监测质量;造成该地区沉降的原因是地质条件和填海工程。该研究可为地区沉降监测和防治提供理论依据。

Surface Deformation Monitoring Based on Dual-polarization Time Series InSAR Technology

To solve the problem of poor monitoring results generated by time-series Interferometric Synthetic Aperture Radar (TS-InSAR) technology in low coherence areas, the traditional TS-InSAR method is improved from the perspective of polarization data. Taking Zhuhai Gaolan Port Economic Zone as the research subject, the article examines 47 dual-polarized Sentinel-1A satellite images with vertical-transmit-and-vertical-receive mode (VV) and vertical-transmit-and-horizontal-receive mode (VH) to experiment and obtain results and do the validation analysis. Results show that the monitoring quality of the time series InSAR technology can be effectively improved by applying dual-polarization data; and that the subsidence in this area is caused by geological conditions and reclamation projects. This research can provide a theoretical basis for the monitoring and prevention of regional subsidence.