College of Earth Sciences, Guilin University of Technology, Guilin, Guangxi, China.
Pingyang Branch of Wenzhou Ecological Environment Bureau, Wenzhou, Zhejiang, China.
Environ Monit Assess. 2022 Jul 28;194(9):615. doi: 10.1007/s10661-022-10311-5.
Land subsidence problems have become increasingly prominent. Traditional monitoring methods, such as level measurements, have high costs and low efficiency. Permanent scatterer interferometric synthetic aperture radar (PS-InSAR) has several advantages for land subsidence monitoring based on technological innovations. Aimed at resolving the key problems associated with PS-InSAR technology, the accuracy of three external digital elevations models (DEMs, namely, SRTM, ASTER GDEM, and PleiadesDEM) was analysed and compared. We found that the introduction of ground control points can significantly improve the elevation accuracy of DEMs. Herein, we introduce the specific processing steps and selection of the key parameters for IN-SAR data using the StaMPS software. We discuss the differences between IN-SAR technology and levelling measurements as well as the influence that the different external DEMs have on IN-SAR data. Based on 36 scenes of TerraSAR-X images, we obtained results for land deformation monitoring in Taiyuan City using PS-InSAR technology, which provided satisfactory monitoring results.
地面沉降问题日益突出。传统的监测方法，如水准测量，成本高、效率低。基于技术创新，永久散射体合成孔径雷达干涉测量（PS-InSAR）在地面沉降监测方面具有诸多优势。针对 PS-InSAR 技术的关键问题，分析并比较了三种外部数字高程模型（DEM，即 SRTM、ASTER GDEM 和 PleiadesDEM）的精度。我们发现引入地面控制点可以显著提高 DEM 的高程精度。本文介绍了使用 StaMPS 软件进行 IN-SAR 数据处理的具体步骤和关键参数的选择。我们讨论了 IN-SAR 技术与水准测量的区别，以及不同外部 DEM 对 IN-SAR 数据的影响。基于 36 景 TerraSAR-X 图像，使用 PS-InSAR 技术对太原市的地面变形进行了监测，得到了令人满意的监测结果。
