A Method of Surface Deformation Monitoring Based on Multi-polarization Time Series SAR Data

A surface deformation and time series technology, applied in the direction of electric/magnetic solid deformation measurement, measurement devices, electromagnetic measurement devices, etc., can solve the problems that the law of surface deformation cannot be fully revealed, the application of InSAR technology is limited, and the number of time series monitoring points is scarce, etc., to achieve Increase the density of timing monitoring points, wide range of deformation monitoring, and improve the effect of interferometric phase quality

Active Publication Date: 2022-01-25
CHINA UNIV OF MINING & TECH
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Problems solved by technology

However, when SAR images are affected by various decoherence factors, whether it is differential InSAR or multi-sequence InSAR technology, in the case of long temporal and spatial baselines or vegetation coverage areas, low interferometric phase quality and low interferometric phase will inevitably occur. The effect is poor, which leads to problems such as a small number of time-series monitoring points and a decrease in monitoring accuracy. It is impossible to fully reveal the law of surface deformation, which limits the application of InSAR technology in surface deformation monitoring.

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  • A Method of Surface Deformation Monitoring Based on Multi-polarization Time Series SAR Data
  • A Method of Surface Deformation Monitoring Based on Multi-polarization Time Series SAR Data
  • A Method of Surface Deformation Monitoring Based on Multi-polarization Time Series SAR Data

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[0070] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0071] A method for monitoring surface deformation based on multi-polarization time-series SAR data proposed by the present invention will be described below with reference to the accompanying drawings.

[0072] refer to figure 1 , a method for monitoring surface deformation based on multi-polarization time-series SAR data, specifically includes the following steps:

[0073] (1) Acquire full-polarization time-series SAR images and dual-polarization time-series SAR images of the monitored area, and identify homogeneous pixels according to the statistical test algorithm, and obtain permanent scatterer targets and distributed scattering objects corresponding to full-polarization time-series SAR images Volume targets and permanent scatterer targets and distributed scatterer targets corresponding to dual-polarization time-series S...

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Abstract

The invention discloses a surface deformation monitoring method based on multi-polarization time-series SAR data, which utilizes the difference in response of surface scatterers to electromagnetic wave echo signals of different polarizations, and performs interferogram phase optimization based on multi-polarization data containing more abundant information. , improve the quality of the interferometric phase, increase the density of time-series monitoring points, and improve the accuracy of deformation monitoring; the method of the present invention can not only effectively weaken the influence of decoherence on surface deformation monitoring, but also realize deformation detection in lower coherence regions, and at the same time, it is better than monopole The time-series InSAR technology has a higher density of deformation monitoring points and a wider range of deformation monitoring.

Description

technical field [0001] The invention belongs to the field of geological monitoring, and in particular relates to a method for monitoring surface deformation based on multi-polarization time-series SAR data. Background technique [0002] Affected by natural factors and human activities, the earth's surface can deform to varying degrees, causing damage to structures on the earth's surface, threatening people's lives and causing economic losses. Rapid and accurate monitoring of surface deformation is essential for the prevention and control of ground deformation disasters, and the health and safety assessment of surface structures. [0003] At this stage, the conventional means of surface deformation monitoring mainly include leveling survey and GNSS (Global Navigation Satellite System) survey. Among them, leveling measurement is the main means of deformation monitoring. Although the monitoring accuracy is very high, when carrying out large-scale deformation monitoring, the pr...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B7/24G01S13/90G01S13/88
CPCG01B7/24G01S13/9004G01S13/88
Inventor 赵峰汪云甲冯瀚闫世勇范洪冬张念斌王腾张雷昕
Owner CHINA UNIV OF MINING & TECH
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