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Three-dimensional wind field inversion method based on non-uniform sampling correction VAD technology

A non-uniform sampling, wind field inversion technology, applied in the direction of radio wave reflection/re-radiation, climate sustainability, instruments, etc. Not established, etc.

Active Publication Date: 2020-08-07
北京理工大学重庆创新中心 +1
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  • Application Information

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Problems solved by technology

[0005] The 3D wind field inversion method based on the non-uniform sampling correction VAD technology provided by the present invention mainly solves the technical problems that the traditional linear wind field assumption is not valid, and uniform sampling at equal azimuth intervals cannot be guaranteed, resulting in low inversion accuracy

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  • Three-dimensional wind field inversion method based on non-uniform sampling correction VAD technology
  • Three-dimensional wind field inversion method based on non-uniform sampling correction VAD technology
  • Three-dimensional wind field inversion method based on non-uniform sampling correction VAD technology

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Embodiment 1

[0047] In this embodiment, taking the airship platform in the near space as an example, the effectiveness of the present invention for inverting the three-dimensional wind field is verified by using the typhoon three-dimensional wind field data obtained through numerical simulation. The airship movement information and typhoon data information are shown in the following table:

[0048] Table 1

[0049]

[0050] For the 3D wind field inversion method based on non-uniform sampling correction VAD technology in this embodiment, please refer to figure 1 , including the following steps:

[0051] Step 1. Establish the geometric relationship and three-dimensional coordinate system of the downward-looking cone scanning, obtain the radial Doppler velocity at different azimuth angles, and obtain the relationship between the radial Doppler velocity and the three-dimensional wind speed, specifically including:

[0052] Such as figure 2 Shown is the downward-looking conical scanning ...

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Abstract

The invention provides a three-dimensional wind field inversion method based on a non-uniform sampling correction VAD technology. According to the method, a nonlinear spatial distribution model of a complex wind field is built; an omnibearing non-uniform sampling data model of a radial Doppler speed caused by platform jitter and other factors is built; a nonlinear wind field hypothesis can betterrepresent a real complex wind field structure; non-uniform sampling is carried out on the radial Doppler speed, and therefore, method is more suitable for the conditions that external disturbance conditions such as platform jitter and data abnormal points exist; and therefore, compared with the traditional VAD technology requiring a linear wind field hypothesis and equidirectional interval uniformsampling, the method of the invention has a better inversion effect.

Description

technical field [0001] The invention relates to the technical field of meteorological radar wind field inversion, in particular to a three-dimensional wind field inversion method based on non-uniform sampling correction VAD technology. Background technique [0002] The emergence, development and evolution of convective storms are closely related to the three-dimensional wind field. The three-dimensional wind field can indicate the dynamic characteristics of the environment before the storm, such as convergence, deformation, and wind shear, and to a certain extent determine the storm and the strong convective force it produces. type of weather. Therefore, how to obtain a three-dimensional wind field with high temporal and spatial resolution to study its refined characteristics is particularly important for small and medium-scale atmospheric information and nowcasting and early warning of strong convective weather processes such as typhoons and tornadoes. Doppler weather rada...

Claims

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Application Information

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IPC IPC(8): G01S7/41G01S13/95
CPCG01S7/41G01S13/95Y02A90/10
Inventor 董锡超田卫明胡佳琪曾涛胡程
Owner 北京理工大学重庆创新中心
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