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A time-series difference radar interferometry method suitable for large-gradient surface subsidence monitoring

A differential interferometry and surface subsidence technology, applied in measuring devices, using re-radiation, radio wave measurement systems, etc., can solve the problems that TS-DInSAR is difficult to meet the needs of rapid or large gradient surface deformation monitoring, and achieve the effect of effective extraction

Active Publication Date: 2020-02-07
SOUTHWEST PETROLEUM UNIV
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Problems solved by technology

[0004] In view of this, this application aims at the problem that TS-DInSAR is difficult to meet the needs of rapid or large-gradient surface deformation monitoring, and provides a time-series differential radar interferometry method suitable for large-gradient surface subsidence monitoring

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  • A time-series difference radar interferometry method suitable for large-gradient surface subsidence monitoring
  • A time-series difference radar interferometry method suitable for large-gradient surface subsidence monitoring
  • A time-series difference radar interferometry method suitable for large-gradient surface subsidence monitoring

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[0029] The implementation of the present application will be described in detail below with reference to the accompanying drawings and examples, so as to fully understand and implement the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects.

[0030] A time-series differential radar interferometry method suitable for large-gradient surface subsidence monitoring, as shown in the attached figure 1 As shown, the specific steps are as follows:

[0031] Step 1. Arbitrarily interferometrically combine all the screened SAR images and calculate the time baseline and space baseline;

[0032] After screening suitable SAR images (excluding SAR images affected by rain, snow and other weather and snow accumulation), any interference combination pairing is performed. Assuming that there are N+1 SAR images, N(N+1 ) / 2 interference pairs. Each interference pair consists of two SAR images, master and slave. Then...

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Abstract

The invention discloses a temporal difference radar interference method applicable to large-gradient ground surface settlement monitoring. According to the whole technical scheme, the method comprises the steps of short-time base line difference interference pattern screening, discrete point phase unwrapping, shape changing component modeling and calculation based on short-time base line difference interference patterns, shape changing component reliability testing, difference interference pattern phase gradient correction, iteration of the processes so as to ensure correctness of shape changing component calculation, and shape changing time sequence modeling and calculation based on corrected difference interference patterns. The problem that shape changing phase ambiguity calculation is difficult or fails due to the fact that shape changes and phase gradients are large in an original temporal difference radar interference technology is solved, finally the purpose of correctly extracting the large-gradient ground surface shape changing speed and the shape changing time sequence is achieved, the effect of decreasing the number of synthetic aperture radar images needed by large-gradient shape changing modeling and calculation is achieved, and the temporal difference radar interference application economic cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of surface subsidence monitoring, and in particular relates to a time-series difference radar interference method suitable for large-gradient surface subsidence monitoring. Background technique [0002] Surface subsidence (deformation vertically to the surface, for the convenience of expression, "deformation" is used to represent "subsidence") is one of the most widespread geological disasters, which has the characteristics of long duration, and occurs mostly in economically developed cities and their suburbs. It will cause lasting harm to economic development, urban construction and people's life. my country is one of the countries with the most serious land subsidence disasters in the world. The area with cumulative subsidence greater than 200 mm exceeds 150,000 square kilometers, mainly concentrated in economically developed areas such as the North China Plain, the Yangtze River Delta, and the Fenwei Basi...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/08
CPCG01S13/08
Inventor 于冰马德英肖东升杨莹辉刘福臻贾宏亮苏勇王继燕
Owner SOUTHWEST PETROLEUM UNIV
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