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Method for improving spaceborne double station difference InSAR extraction deformation precision

A differential and space-borne technology, applied in the field of synthetic aperture radar interferometry, can solve the problems that do not involve the phase model of the two-station differential InSAR, and achieve the effect of reducing the estimation error

Active Publication Date: 2017-08-11
INST OF REMOTE SENSING & DIGITAL EARTH CHINESE ACADEMY OF SCI
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Problems solved by technology

However, this method does not involve the phase model of the two-station differential InSAR, and it believes that the deformation phase is only related to the elevation change. For the repeated orbit differential interference of the single-station SAR: φ dint (i,j)=-4πΔr(i,j) / λ, the assumption is established

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  • Method for improving spaceborne double station difference InSAR extraction deformation precision
  • Method for improving spaceborne double station difference InSAR extraction deformation precision
  • Method for improving spaceborne double station difference InSAR extraction deformation precision

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[0031] Taking the Gela Dandong glacier area at the source of the Yangtze River as an example, the present invention will be described in detail in conjunction with the accompanying drawings, so that the advantages and characteristics of the present invention can be more easily understood by those skilled in the art, thereby making a more detailed description of the protection scope of the present invention Clearly and clearly defined.

[0032] refer to figure 1 , the invention discloses a method for improving the deformation accuracy of space-borne dual-station differential InSAR extraction, comprising the following steps:

[0033] Step 1. Based on the spaceborne bistatic SAR data and the external terrain, the differential interferometric phase of the bistatic differential InSAR is obtained using conventional interferometric processing techniques.

[0034] 1. Data selection

[0035] Select the space-borne dual-station TanDEM-X / TerraSAR-X data covering the working area. The d...

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Abstract

The invention discloses a method for improving spaceborne double station difference InSAR extraction deformation precision. For a problem that no corresponding phase model is for spaceborne double station difference InSAR deformation monitoring, a spaceborne double station difference InSAR phase model is established, and a method utilizing a spaceborne double station difference interference phase to acquire surface elevation deformation is further established. The method is advantaged in that compared with spaceborne double station difference InSAR in the prior art, a transformation factor between the space-variant spaceborne double station difference InSAR phase and surface deformation is acquired through the spaceborne double station difference InSAR phase model, accuracy of deformation estimation of a deformation region is improved; monitoring efficiency is high, the method is convenient for enforcement, the result is visual and clear, and the method further has great practical values and wide application prospects in the surface deformation monitoring application field of large-area deformation regions of glacier change and mining subsidence.

Description

technical field [0001] The invention belongs to the technical field of synthetic aperture radar interference application, and relates to a method for improving the deformation accuracy of space-borne dual-station differential InSAR extraction. Background technique [0002] The earth's surface is the interface between various circles and the universe. The phenomenon of surface elevation change or displacement caused by natural or human factors is called surface deformation. If the surface deformation exceeds a certain limit, it will evolve into a geological disaster, which is harmful to human life. serious damage to property safety. Understanding the law of surface deformation is an important basis for preventing and mitigating natural disasters, and it is also a key constraint of geodynamic models. Therefore, monitoring surface deformation has important scientific value and practical significance. [0003] Traditional surface deformation measurement methods include leveling...

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Application Information

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IPC IPC(8): G01S13/90
CPCG01S13/9023G01S13/9058
Inventor 刘广张露闫世勇
Owner INST OF REMOTE SENSING & DIGITAL EARTH CHINESE ACADEMY OF SCI
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