华北水利水电大学学报（自然科学版）2025，Vol.46Issue(2)：13-22,10.DOI:10.19760/j.ncwu.zk.2025018
面向内陆峡谷型水库的GACOS时序InSAR大气二次改正方法研究
GACOS-based Secondary Atmospheric Correction Method for Time-series InSAR in Inland Canyon-type Reservoir
摘要
Abstract
Atmospheric delay remains a critical challenge in improving the accuracy of time-series interferometric synthetic ap-erture radar(TS-InSAR).Existing correction approaches primarily fall into two categories:self-correction based on interfero-gram characteristics and external data-assisted methods.To address the limitations of conventional methods in complex ter-rains,this study proposes a secondary atmospheric correction framework integrating regression models and the Generic Atmos-pheric Correction Online Service(GACOS)dataset,specifically tailored for inland canyon-type reservoirs.The proposed method capitalizes on the synergistic advantages of statistical regression and high-resolution atmospheric modeling.A case study at Hekoucun Reservoir demonstrates significant improvements:Compared to conventional TS-InSAR,the GACOS-only correction enhances accuracy by 5.576%,while the combined linear regression and GACOS approach achieves a 22.538%reduction in residual errors.Validation using in-situ deformation measurements confirms the method's effectiveness in mitiga-ting stratified atmospheric artifacts induced by canyon topography.These findings provide a robust technical reference for high-precision deformation monitoring of reservoir slopes in geomorphologically constrained regions using advanced InSAR so-lutions.关键词
时序InSAR/大气延迟/回归模型/GACOS/河口村水库Key words
time series InSAR/atmospheric delay correction/regression model/GACOS/Hekoucun Reservoir分类
测绘与仪器引用本文复制引用
刘浩锋,孟令奎,罗志,李靖霖,张镇,李涵曼,李林宜,张文..面向内陆峡谷型水库的GACOS时序InSAR大气二次改正方法研究[J].华北水利水电大学学报（自然科学版）,2025,46(2):13-22,10.基金项目
国家重点研发计划项目(2021YFB3900603). （2021YFB3900603）
