Inversion method for aerosol extinction coefficient horizontally detected by laser radar

A technology of extinction coefficient and laser radar, which is applied in the direction of radio wave measurement system, measurement device, climate sustainability, etc., can solve problems such as inability to invert horizontal aerosol extinction coefficient, lack of reference point extinction coefficient, etc.

Active Publication Date: 2019-03-29
天津珞雍空间信息研究院有限公司
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Problems solved by technology

[0012] The purpose of the present invention is to aim at the technical defects of the prior art, and to provide a laser radar horizontal detection aerosol extinction coefficient inversion method to solve the problem that the traditional method cannot invert the horizontal aerosol extinction coefficient due to the lack of reference points and corresponding extinction coefficients The problem

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  • Inversion method for aerosol extinction coefficient horizontally detected by laser radar
  • Inversion method for aerosol extinction coefficient horizontally detected by laser radar
  • Inversion method for aerosol extinction coefficient horizontally detected by laser radar

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Embodiment 1

[0024] A laser radar horizontal detection aerosol extinction coefficient inversion method, comprising: using the slope method to calculate the average value of the extinction coefficient of a relatively uniform segment of the laser radar echo signal; using the average value of the extinction coefficient as the initial value of the extinction coefficient, taking The midpoint of a relatively uniform section of the signal is taken as a reference point into the backward integration formula of the Fernald method to invert the horizontal extinction coefficient of the atmospheric aerosol.

[0025] Wherein, described Femald method backward integration formula is as shown in following formula (1):

[0026]

[0027] In formula (1), α a (r) is the extinction coefficient of atmospheric aerosol; a m (r) is the extinction coefficient of atmospheric molecules; S a is the atmospheric aerosol extinction backscattering ratio; S m is the extinction backscattering ratio of atmospheric molec...

Embodiment 2

[0030] A laser radar horizontal detection aerosol extinction coefficient inversion method, comprising: using the slope method to calculate the average value of the extinction coefficient of a relatively uniform segment of the laser radar echo signal; using the average value of the extinction coefficient as the initial value of the extinction coefficient, taking The midpoint of the relatively uniform section of the signal is taken as a reference point into the backward integration formula of the Femald method to invert the horizontal extinction coefficient of the atmospheric aerosol.

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Abstract

The invention discloses an inversion method for the aerosol extinction coefficient horizontally detected by laser radar. The method is combined with a slope method and a classical Fernald algorithm, and can achieve accurate inversion of horizontally detecting the extinction coefficient of aerosol. The method comprises the steps of: calculating extinction coefficient mean value of a uniform segmentin a laser radar echo signal by using the slope method; taking the extinction coefficient calculated by the slope method as an extinction coefficient initial value, substituting the midpoint of the uniform segment of the echo signal as a reference point into a Fernald method integral formula, and calculating an aerosol horizontal extinction coefficient profile. According to the inversion method for the aerosol extinction coefficient horizontally detected by laser radar, by combining with the slope method and the classical Fernald algorithm, the horizontal distribution aerosol extinction coefficient can be inversed, the problem that the conventional Fernald algorithm cannot invert the horizontal aerosol extinction coefficient can be solved due to lack of reference points and a corresponding extinction coefficient, therefore, distribution of near-surface aerosol and pollutants can be detected by the laser radar.

Description

technical field [0001] The invention relates to the technical field of atmospheric laser radar, in particular to a method for inversion of aerosol extinction coefficient for horizontal detection of laser radar. Background technique [0002] In recent years, with the rapid development of my country's economy, the expansion of urban scale and the large increase in urban population, the problem of regional compound air pollution caused by dust from construction sites, vehicle exhaust, industrial waste gas and cooking fumes has become increasingly prominent, seriously restricting the sustainable development of social economy. Lidar is an effective means of remote sensing to observe atmospheric particulate matter pollution. It has the characteristics of wide detection range, continuous monitoring, and high temporal and spatial resolution. It is widely used in the field of atmospheric aerosol and environmental pollution monitoring. The algorithm of vertical detection aerosol retri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S17/95G01S7/48
CPCG01S7/4802G01S17/95Y02A90/10
Inventor 马昕史硕龚威徐宝李治平张玲玲
Owner 天津珞雍空间信息研究院有限公司
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