Insar time-series 3D deformation monitoring method for winding phase

A three-dimensional deformation and timing technology, applied in the direction of electric/magnetic solid deformation measurement, measurement devices, electromagnetic measurement devices, etc., can solve problems such as phase unwrapping difficulties, achieve the effect of enriching the method system, avoiding unwrapping steps, and simple operation
CN112797886BActive Publication Date: 2022-04-22CENT SOUTH UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CENT SOUTH UNIV
Publication Date
2022-04-22

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Abstract

The invention belongs to the technical field of interference synthetic aperture radar, and in particular relates to an InSAR time-series three-dimensional deformation monitoring method oriented to winding phase. Including: collecting multi-track time-series SAR images, obtaining interferometric pair data sets and time-series high-coherence point data sets, constructing a Dirony triangulation network, and establishing the relationship between multi-track time-series InSAR winding phase and time-series three-dimensional surface deformation gradient based on the surface stress-strain model. The functional relationship between them; the iterative weighted least squares method is used to solve the time series 3D surface deformation gradient, and the time series 3D surface deformation of the target arc is obtained, and the time series 3D surface deformation at each high coherence point is obtained by spatial integration. The interferogram unwrapping step in the solution process reduces the influence of gross errors and observations with large errors on the calculation of unknown parameters. The InSAR three-dimensional surface deformation monitoring process is efficient and accurate.
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Description

technical field

[0001] The invention belongs to the technical field of interference synthetic aperture radar, and in particular relates to an InSAR time-series three-dimensional deformation monitoring method oriented to winding phase. Background technique

[0002] Interferometric Synthetic Aperture Radar (SAR, InSAR) technology uses two SAR images to quickly obtain large-scale, high-resolution surface deformation results. However, the InSAR data of a single orbit can only obtain the one-dimensional projection of the real three-dimensional deformation along the line of sight of the radar satellite, and it is difficult to accurately reveal the characteristics of the real surface motion, which can easily lead to misjudgment and misjudgment. With the increasing number of SAR satellites, InSAR time-series deformation observation data in different directions from multiple orbits / different technologies can be obtained in the same research area, which provides an opportunity for the...

Claims

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