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

Active Publication Date: 2022-04-22
CENT SOUTH UNIV
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Problems solved by technology

[0004] Based on this, the present invention aims at the difficulty of phase unwrapping in the traditional method of InSAR three-dimensional surface deformation monitoring, based on the surface stress-strain model, by using iterative weighted least squares method to solve the three-dimensional deformation gradient, to realize InSAR three-dimensional surface deformation monitoring

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

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[0054] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0055] Such as figure 1 As shown, in the embodiment of the present invention, a winding phase-oriented InSAR time-series three-dimensional deformation monitoring method is proposed, which specifically includes the following steps:

[0056] Step S1: Obtain multi-track time-series SAR images, perform registration and differential interferometry on the same track SAR images, and obtain a multi-track InSAR interferometry pair dataset with preset spatio-temporal baseline thresholds.

[0057] In the embodiment of the present invention, the multi-track time-series SAR image of a specific research area is...

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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.

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...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B7/16G01S7/41G01S13/90
CPCG01B7/16G01S7/41G01S13/9023
Inventor 刘计洪胡俊李志伟朱建军
Owner CENT SOUTH UNIV
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