北京大学学报（自然科学版）2025，Vol.61Issue(1)：111-120,10.DOI:10.13209/j.0479-8023.2024.122
Sentinel-1卫星InSAR干涉图大气校正方法对比
Comparison of Atmospheric Correction Methods for InSAR Interferograms of Sentinel-1 Satellite:Taking the Central Tibet as an Example
摘要
Abstract
In order to evaluate the applicability of different atmospheric correction methods to the deformation rate of interferometric synthetic aperture radar(InSAR)technology,especially in the time series deformation calculation,the principles of two typical InSAR atmospheric correction methods,namely the Generic Atmospheric Correction Online Service for InSAR(GACOS)and common-scene-stacking,are introduced.Taking the central Tibet as the study area,the two methods are applied to the atmospheric correction of InSAR interferograms to evaluate their performance in time series.The atmospheric correction effect on long-term baseline interferograms of more than one year is presented,and finally,the equivalent cumulative deformations in central Tibet are derived.The results show that for a single interferogram,the atmospheric correction effect of the common-scene-stacking method is signifi-cantly better than that of GACOS with unstable results,and the common-scene-stacking method can reduce the standard deviation by more than 60%.In terms of time series,the atmospheric delay trends provided by the two methods are similar,but the specific values differ greatly.GACOS can improve the time series results of InSAR.It is recommended to choose one or a combination of the two methods according to actual needs,based on their advantages and disadvantages.关键词
InSAR/大气校正/GACOS/公共影像堆叠法/西藏中部Key words
InSAR/atmospheric correction/GACOS/common-scene-stacking/central Tibet引用本文复制引用
樊文智,王腾..Sentinel-1卫星InSAR干涉图大气校正方法对比[J].北京大学学报（自然科学版）,2025,61(1):111-120,10.基金项目
国家自然科学基金(42021003)资助 （42021003）
