地理空间信息2025，Vol.23Issue(6)：8-12,60,6.DOI:10.3969/j.issn.1672-4623.2025.06.002
中老铁路沿线InSAR监测几何畸变判识与灵敏度建模
Geometric Distortion Discrimination and Sensitivity Modeling of InSAR Monitoring Along the China-Laos Railway
摘要
Abstract
In plateau and mountainous areas,the complex terrain will interact with the side-looking imaging of InSAR technology to produce geo-metric distortion,which makes it difficult to obtain effective observations and affects the sensitivity of deformation monitoring.In this study,combined with Sentinel-1 satellite data and topographic data,we realized the quantitative analysis of geometric distortion along the China-Laos Railway by the discriminant method considering the change rate of local incident angle,and constructed the InSAR monitoring sensitivity model based on ground geometry and imaging geometry.The results show that the main geometric distortion along the China-Laos Railway is perspec-tive shrinkage,accounting for 49.2%and 49.5%of the area in the lifting and lowering rail data,respectively,and the area of overlapping and shading area is only 1.6%and 1.3%in the lifting and lowering rail data.Most of the sensitivity values in the lifting and lowering rail data are between 0.2～0.6,accounting for 43.8%and 43.9%of the area,and the sensitivity values less than 0.2 accounted for 26.8%and 26.4%,respectively.In this paper,we comprehensively considered the influence of SAR geometric distortion and sensitivity on InSAR monitoring of long linear ground objects,which could provide a scientific basis for subsequent surface deformation monitoring and the accuracy of result interpretation.关键词
中老铁路/InSAR/几何畸变/灵敏度Key words
China-Laos Railway/InSAR/geometric distortion/sensitivity分类
天文与地球科学引用本文复制引用
黄一鸣,杨梦诗,黄成,李梦华,刘朝海,赵志芳..中老铁路沿线InSAR监测几何畸变判识与灵敏度建模[J].地理空间信息,2025,23(6):8-12,60,6.基金项目
国家自然科学青年基金资助项目(42101450) （42101450）
云南省基础研究计划面上项目(202301AT070145) （202301AT070145）
云南省"兴滇英才"青年人才引进项目. （）
