摘要
针对快速城市化进程中填海区域地表形变监测精度不足的问题,提出基于GNSS与合成孔径雷达干涉测量融合技术的地表形变监测方法。研究结果表明:融合PS-InSAR与SBAS-InSAR技术后,填海区沉降监测空间分辨率提升至20 m×20 m,垂直方向精度达±6.6 mm;填海区域沉降速率超过-10 mm/a的异常点占比达12.2%,较非填海区高15.3倍,且与地铁线路空间分布呈现显著相关性。该方法通过多源遥感数据互补,解决了传统测量技术在大范围动态形变监测中的时空分辨率矛盾,为海岸带工程安全评估和城市地质灾害预警提供了毫米级精度的技术支撑,具有显著工程应用价值。
A surface deformation monitoring method based on the fusion technology of GNSS and synthetic aperture radar interferometry is proposed to address the issue of insufficient accuracy in monitoring surface deformation in reclaimed land areas during the rapid urbanization process.The research results show that after integrating PS-InSAR and SBAS-InSAR technologies,the spatial resolution of settlement monitoring in reclaimed areas has been improved to 20 m×20 m and the vertical accuracy has reached±6.6 mm.The proportion of abnormal points with an average annual settlement rate exceeding-10 mm/year in the reclaimed area is 12.2%,which is 15.3 times higher than that in non-reclaimed areas.It shows a significant correlation with the spatial distribution of subway lines.This method solves the spatio-temporal resolution contradiction of traditional measurement techniques in large-scale dynamic deformation monitoring by complementing multi-source remote sensing data,provides millimeter level precision technical supports for coastal engineering safety assessment and urban geological hazard warning and has significant engineering application value.
作者
李炜宏
LI Weihong(Natural Resources Surveying and Mapping Institute of Shantou City,Shantou 515000,China)
出处
《经纬天地》
2025年第4期96-100,共5页
Survey World
关键词
导航卫星系统
地表形变监测
精度估算
PSI
SBAS
navigation satellite system
land surface deformation monitoring
accuracy estimation
PSI
SBAS
