SAR sight line direction deformation and slope direction sensitivity calculation method

A calculation method and sensitivity technology, which can be used in complex mathematical operations, radio wave measurement systems, and radio wave reflection/re-radiation. It can solve problems such as unrealistic slope deformation detection results and achieve correct understanding and interpretation. The effect of judgment and accurate calculation

Active Publication Date: 2021-10-22
CHENGDU UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

[0004] Aiming at the above-mentioned deficiencies in the prior art, a method for calculating SAR line-of-sight deformation and slope as

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  • SAR sight line direction deformation and slope direction sensitivity calculation method
  • SAR sight line direction deformation and slope direction sensitivity calculation method
  • SAR sight line direction deformation and slope direction sensitivity calculation method

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[0040] The specific embodiments of the present invention are described below so that those skilled in the art can understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes Within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are included in the protection list.

[0041] Such as figure 1 As shown, the SAR line-of-sight deformation and slope aspect sensitivity calculation method includes the following steps:

[0042] S1. Obtain the SAR data covering the slope, and extract the parameter information of the SAR satellite ascending orbit, descending orbit parameter information and satellite height from the SAR data through radiometric calibration and geocoding;

[0043] S2. Obtain the DE...

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Abstract

The invention discloses a synthetic aperture radar (SAR) sight line direction deformation and gradient direction sensitivity calculation method, which comprises the following steps of: acquiring SAR data and DEM data covering a slope body, and extracting an image local incident angle by utilizing a satellite side-looking imaging principle; carrying out geometric distortion judgment on the ascending rail and the descending rail of the slope body through the local incidence angle, and obtaining the specific positions of geometric distortion areas of orbit rising and orbit falling; according to the collected parameter information of SAR satellite orbit rising and the satellite height, caculating the detection sensitivity of orbit rising when the gradient and the slope direction change, and according to the collected parameter information of SAR satellite orbit falling and the satellite height, calculating the detection sensitivity of orbit falling when the gradient and the slope direction change; and dividing sensitivity distribution by combining the specific position and sensitivity of the geometric distortion area. The method can determine the sensitivity of different slope directions under different track InSAR detection in large-range landslide hidden danger identification in alpine and canyon areas, and has orbit rising and falling detection applicability when the gradient and the slope direction change.

Description

technical field [0001] The invention relates to the field of space-to-earth observation, in particular to a method for calculating SAR line-of-sight deformation and slope aspect sensitivity. Background technique [0002] Landslide is one of the most serious natural disasters that endanger human survival and development. It has four characteristics: wide distribution, huge scale, complex mechanism and serious harm. And the landslide not only has great harm itself, but also causes secondary disasters such as mudslides and barrier lakes, which is a highly harmful natural disaster. Landslide disasters occur frequently in the southwest mountainous area of ​​Sichuan Province, causing huge losses such as river blockage, road blockage, and submerged villages. The landslides in this area are famous for their frequent disasters, large scale, complex mechanism, and great harm. It is typical and representative all over the world. Traditional geological survey methods have limited cove...

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Application Information

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IPC IPC(8): G01S13/90G01S13/86G01S7/40G06F17/16
CPCG01S13/90G01S13/86G01S13/9023G01S7/40G06F17/16G01C5/005G01S13/885G01S13/9017
Inventor 史先琳戴可人邓晋
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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