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SAR data and GNSS data-based infrastructure settlement monitoring method and system

A technology for infrastructure and subsidence monitoring, applied in radio wave measurement systems, satellite radio beacon positioning systems, measurement devices, etc., can solve problems such as InSAR data cannot be eliminated, InSAR image misinterpretation, etc., and achieve the effect of improving the level of microscopic monitoring

Active Publication Date: 2019-07-23
上海颖川佳固信息工程股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] InSAR as a space geodetic method, due to the influence of atmospheric delay, satellite orbit error, surface conditions and time-varying decorrelation, it is easy to cause wrong interpretation of InSAR images, and InSAR data itself cannot eliminate or weaken these effects

Method used

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  • SAR data and GNSS data-based infrastructure settlement monitoring method and system
  • SAR data and GNSS data-based infrastructure settlement monitoring method and system
  • SAR data and GNSS data-based infrastructure settlement monitoring method and system

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Embodiment 1

[0028] As a kind of active microwave remote sensing, synthetic aperture radar has the characteristics of all-day, all-weather, strong penetrating ability, no need to set up ground observation stations, etc. The specific information that remote sensing can provide is an important technical guarantee for promoting remote sensing and geographic information industries, and it can provide greater data protection for data acquisition in areas with variable climates (cloudy, rainy, foggy, etc.) and complex terrain in China , which can be used as a supplement when the optical data is vacant.

[0029] The radar satellites currently in operation are mainly X, C, and L bands. Radar satellites in different bands have different penetration capabilities, and the parameters of different satellites are different, resulting in different scopes of application.

[0030] Based on the following considerations, this embodiment adopts the high-resolution SAR data provided by the Italian COSMO-SkyMe...

Embodiment 2

[0074] Please refer to figure 2 , an infrastructure settlement monitoring system based on SAR data and GNSS data, including: a number of Beidou GNSS monitoring, 1, a number of InSAR monitoring stations 2 and a server 3, wherein Beidou GNSS monitoring station 1 and InSAR monitoring station 2 are connected to the server 3 respectively Electrical connection; Beidou GNSS monitoring station 1 obtains GNSS data and sends it to the server; InSAR monitoring station 2 obtains SAR data and sends it to the server; server 3 calculates based on the method of embodiment 1 based on SAR data and GNSS data The deformation rate of the infrastructure.

[0075] In the above invention embodiment, the phase information in the radar image data in different periods in the same area is used to extract the measurement technology of infrastructure elevation information and deformation information. Compared with traditional infrastructure settlement monitoring methods, such as precision leveling and Bei...

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Abstract

The invention discloses an SAR data and GNSS data-based infrastructure settlement monitoring method and system. The method comprises the steps of carrying out calculation on the basis of SAR data to obtain a first deformation speed in a slope distance direction; carrying out calculation on the basis of GNSS data to obtain a second deformation speed; and carrying out calculation on the basis of thefirst deformation speed and the second deformation speed so as to obtain a third deformation speed. According to the method and system, an InSAR technology is combined with a Beidou GNSS technology,so that the settlement displacement data corresponding to a imaging period in a whole covering range can be obtained, the monitoring precision can be up to a millimeter level, and the precision requirement for squirmy disaster monitoring can be satisfied.

Description

technical field [0001] The present application relates to the field of surface deformation monitoring, in particular to a method and system for infrastructure settlement monitoring based on SAR data and GNSS data. Background technique [0002] Infrastructure settlement is one of the important contents of urban management. It is a reflection of the internal compression of the soil layer on the surface. Although the disaster is slow to cause, once formed, it is extremely difficult to recover. Since the first discovery of land subsidence in Shanghai in 1921, with the acceleration of urbanization, the economic losses and other hazards caused by land subsidence have gradually become prominent, and the more developed the urban economy, the more serious the damage of land subsidence. [0003] As a space geodetic method, InSAR is affected by factors such as atmospheric delay, satellite orbit error, surface conditions, and time-varying decorrelation, which can easily lead to misinter...

Claims

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Application Information

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IPC IPC(8): G01C5/00G01S13/90G01S19/14
CPCG01C5/00G01S13/90G01S19/14G01S13/9027
Inventor 王翔
Owner 上海颖川佳固信息工程股份有限公司