An atmospheric error correction method and system applied to wide-area synthetic aperture radar interferometry

By using mathematical models and spatiotemporal filters to gradually remove atmospheric errors in wide-area synthetic aperture radar interferometry, the problems of separating and reducing vertical stratification, turbulence, and systematic errors were solved, thereby improving phase accuracy and the reliability of deformation monitoring.

CN122362383APending Publication Date: 2026-07-10BEIJING MUNICIPAL ENG RES INST +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIJING MUNICIPAL ENG RES INST
Filing Date
2026-04-13
Publication Date
2026-07-10

AI Technical Summary

Technical Problem

Existing technologies in wide-area synthetic aperture radar interferometry struggle to effectively separate and reduce vertically stratified atmospheric phase, turbulent atmospheric phase, and residual systematic trend errors, leading to decreased phase accuracy and consistency, and affecting the reliability of deformation monitoring results.

Method used

By adopting a technical approach of component-based, layer-based, and link-based stripping, atmospheric errors are gradually removed through the establishment of mathematical models and spatiotemporal joint filters. This includes establishing a linear function model based on the correlation between phase and terrain elevation, spatiotemporal joint filtering, and polynomial surface model fitting and correction to achieve coordinated error processing.

Benefits of technology

It improves the accuracy and consistency of the phase after atmospheric correction, reduces the impact of long-wavelength drift and random noise on deformation calculation, and enhances the reliability and stability of deformation monitoring results.

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Abstract

This invention discloses an atmospheric error correction method and system for wide-area synthetic aperture radar interferometry, relating to the field of synthetic aperture radar technology. The method includes: acquiring unwrapped differential interferograms generated from multiple SAR images; establishing and applying a first mathematical model based on the phase values ​​of each pixel in the differential interferogram and the corresponding terrain elevation values ​​to remove terrain-related vertically layered atmospheric phases, obtaining a first intermediate result; applying a spatiotemporal joint filter to the first intermediate result to separate and remove random atmospheric phases caused by atmospheric turbulence, obtaining a second intermediate result; and establishing and applying a second mathematical model to the second intermediate result for fitting correction to remove residual systematic error phases, obtaining the atmospherically corrected phase. Through the technical solution of this invention, the accuracy, spatial consistency, and temporal stability of the atmospherically corrected phase are improved, enhancing the reliability of subsequent deformation monitoring results.
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