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A Method for Estimating Land Subsidence in Low Coherence Areas

A land subsidence and low-coherence technology, which is applied in the direction of measuring devices, height/level measurement, instruments, etc., can solve the problem that the ground subsidence in low-correlation areas cannot be accurately extracted

Active Publication Date: 2021-06-15
TAIYUAN UNIV OF TECH
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  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for estimating land subsidence in low-coherence areas to overcome the inability of traditional InSAR technology to accurately extract ground subsidence in low-correlation areas

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  • A Method for Estimating Land Subsidence in Low Coherence Areas
  • A Method for Estimating Land Subsidence in Low Coherence Areas

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Embodiment Construction

[0024] The specific implementation of the present invention will be further described below through the application case of the method for estimating the land subsidence in the low coherence area of ​​the Xuangang coal mining subsidence area.

[0025] Step 1. Order remote sensing images of Xuangang coal mining subsidence area

[0026] Order and download 26 Sentinel-1A remote sensing images covering the Xuangang coal mining subsidence area from November 2015 to June 2017 from the remote sensing image ordering website of professional institutions. The Sentinel-1A data was converted into the internal format of SARSscape, and the vector boundary of the Xuangang coal mining subsidence area was used for data clipping to obtain the multi-temporal SLC data of 26 scenes in the Xuangang coal mining subsidence area.

[0027] Step 2. Remote sensing image processing of Xuangang coal mining subsidence area

[0028] Baseline estimation and small baseline set generation, image matching, inte...

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Abstract

A method for estimating land subsidence in a low-coherence area, the estimation method is remote sensing image ordering in the study area, remote sensing image processing in the study area, inversion of land subsidence in the study area, data inspection of land subsidence in the study area, low coherence in the study area The regional land subsidence interpolation method is determined, and the ground subsidence in the low coherence area of ​​the research area is estimated. The present invention provides a new method for timely and accurately estimating the low coherence area ground subsidence, and realizes low coherence based on geographic information space technology. Rapid and accurate monitoring of land subsidence in critical areas.

Description

technical field [0001] The invention relates to a method for estimating the amount of ground subsidence in a low coherence area, in particular to a method for estimating the amount of ground subsidence in a low coherence area efficiently and accurately by using geographic information space interpolation technology. Background technique [0002] Spaceborne synthetic aperture radar interferometry (InSAR) has become one of the widely used land subsidence measurement techniques due to its high resolution, high precision, and all-weather advantages. The phase difference of radar images is used to obtain land subsidence values, mainly including D-InSAR method, PS-InSAR method, SBAS-InSAR method, DS-InSAR method and MAI method. [0003] However, due to factors such as the change of scatterers in the resolution unit of the imaging moment, the change of sensor attitude, and the radar wave transmittance, the radar echo signal is affected by space-time decoherence to varying degrees, r...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C5/00
CPCG01C5/00
Inventor 任鸿瑞张世雅薛娟娟
Owner TAIYUAN UNIV OF TECH