Application of DS-InSAR technology in surface settlement monitoring at Beijing Daxing International Airport

doi:10.13474/j.cnki.11-2246.2025.1206

Abstract

Abstract: Aiming at the problem that the low coherence of airport runway makes it impossible for conventional InSAR technology to extract sufficient high-quality pixels,this paper uses 61 Sentinel-1A satellite data from January 2022—December 2023 to obtain the surface settlement monitoring results of Beijing Daxing International Airport by using the distributed scatterer synthetic aperture radar interferometry (DS-InSAR)method based on two-sample KS test and covariance matrix eigenvalue decomposition.The spatio-temporal distribution characteristics and the influencing factors of deformation are analyzed.The results show that the surface settlement rate in the study area ranges from -38.9～19.0mm/a,and the density and accuracy of the monitoring points obtained by DS-InSAR is higher,which can reflect more abundant surface deformation details.There are different degrees of settlement in each runway; The settlement in the West 3 flight area is relatively serious,and there are multiple sections with large settlement rate gradient values on the West 3 runway.The overall structure of the terminal building is relatively stable,and there is no obvious deformation trend.

Key words: time series InSAR, settlement monitoring, distributed scatterers, phase optimization

CLC Number:

P237

JIN Xiao, WANG Peng, GE Licheng, WANG Yujia. Application of DS-InSAR technology in surface settlement monitoring at Beijing Daxing International Airport[J]. Bulletin of Surveying and Mapping, 2025, 0(12): 34-40.

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