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A Lidar Slope Visibility Inversion Method

A lidar and visibility technology, applied in the field of lidar atmospheric detection, can solve the problem of inaccurate measurement results of oblique visible distance during the daytime

Active Publication Date: 2021-05-25
XIAN UNIV OF TECH
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Problems solved by technology

[0005] The purpose of the present invention is to provide an inversion method of lidar slant visibility, which solves the problem of inaccurate daytime slant visible distance measurement results in the prior art

Method used

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  • A Lidar Slope Visibility Inversion Method
  • A Lidar Slope Visibility Inversion Method
  • A Lidar Slope Visibility Inversion Method

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Experimental program
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Embodiment Construction

[0052] The present invention will be described in detail below in combination with specific embodiments.

[0053] The present invention provides a method for inversion of lidar slant range visibility, such as figure 1 As shown, follow the steps below:

[0054] Step 1. Use lidar detection and inversion to obtain the profile of atmospheric aerosol extinction coefficient, the profile of atmospheric aerosol backscattering coefficient at height z, the distribution of atmospheric aerosol particle spectrum and atmospheric Profiles of scattering properties;

[0055] Step 1.1, use the Raman scattering echo signal intensity P1N(z) at the wavelength of 386nm to finely invert the atmospheric aerosol extinction coefficient profile αA(λ1,z) at the wavelength of 355nm, expressed as:

[0056]

[0057] Using the Raman scattering echo signal intensity P2N(z) at the wavelength of 607nm, the fine inversion of the atmospheric aerosol extinction coefficient profile αA(λ3,z) at the wavelength o...

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Abstract

The invention discloses an inversion method of laser radar slant visibility, and the specific steps include: 1) using laser radar detection and inversion to obtain atmospheric aerosol optical parameters, microphysical parameters and atmospheric scattering characteristics on the slant path at different wavelengths The profile of the atmospheric radiative transfer equation provides real-time and accurate atmospheric input parameters for the solution of the atmospheric radiative transfer equation; 2) input the obtained atmospheric input parameters into the SBDART calculation software to obtain the luminance of the atmospheric column on the slope path; 3) use the 4) Determine the inherent contrast between the target and the background; 5) Use the functional relationship between the contrast transfer coefficient and the slope optical thickness and the inherent relationship between the target and the background In contrast, the numerical method accurately solves the distribution of slope visibility at different heights, and determines the atmospheric slope visibility value; it solves the problem of inaccurate daytime slope visibility distance measurement results existing in the prior art.

Description

technical field [0001] The invention belongs to the technical field of laser radar atmospheric detection and the application technical field of space target detection, and relates to an inversion method of laser radar slope visibility. Background technique [0002] As an active remote sensing detection technology and tool that uses light waves as the excitation source and atmospheric molecules and aerosol particles as the medium, lidar has unique features in remote sensing detection height, spatial resolution, continuous monitoring in time, and measurement accuracy. 2) detection of atmospheric optical parameters; 3) detection of aerosol and plume; 4) detection of concentration and distribution of atmospheric gas components; 5) detection of atmospheric wind and detection of turbulence. [0003] Visibility forecasting plays an extremely important role in weather analysis, aviation and navigation, land transportation, astronomical observation and other fields. Visibility usua...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/17G01N21/65G01S17/88G01S17/95
CPCY02A90/10
Inventor 王玉峰李仕春闫庆刘晶晶狄慧鸽华灯鑫
Owner XIAN UNIV OF TECH
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