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Inversion method for transmittance of whole atmosphere

A technology of atmospheric transmittance and inversion, applied in the field of atmospheric optics, can solve the problems of less research on atmospheric transmittance

Inactive Publication Date: 2012-07-11
NO 63655 TROOPS OF THE CHINESE PEOPLES LIBERATION ARMY
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Problems solved by technology

The domestic Anhui Institute of Optics and Fine Mechanics, the National Meteorological Administration and other units have conducted a large number of studies on the optical parameters of atmospheric aerosols using ground-based solar radiometers. The main research direction is the measurement of atmospheric aerosol optical thickness and the related inversion of specific bands of instruments. , but there are few studies on the measurement of the atmospheric transmittance of the whole layer and the inversion of the atmospheric transmittance of a specific wavelength

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  • Inversion method for transmittance of whole atmosphere

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Embodiment Construction

[0018] According to Bouguer's law, the direct solar radiation E(W / m 2 )for:

[0019] E(λ)=E 0 (λ)·R·exp(-m(θ)·τ(λ))·T g (1)

[0020] where E 0 (λ) is the direct solar spectral irradiance at the last wavelength λ of the atmosphere at a distance of one astronomical unit (AU); R is the sun-earth distance correction factor at the measurement moment (R=(r m / r) 2 , r is the actual distance between the sun and the earth at the time of observation; r m is the average distance between the sun and the earth); m(θ) is the relative air mass (also known as the atmospheric mass number), θ is the solar zenith angle at the observation time; τ(λ) is the total optical thickness of the atmosphere in the vertical direction at the wavelength λ; T g In order to absorb the gas transmittance, in the actual measurement, the measurement wavelength of the general solar pyranometer is selected at the wavelength where the absorption of gas molecules can be ignored, and all T g =1.

[0021] ...

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Abstract

The invention discloses an inversion method for the laser transmittance of the whole atmosphere. The method comprises the following steps of: measuring an aerosol optical depth of the whole atmosphere by selecting a specific wavelength, and performing inversion to obtain the aerosol optical depth of the whole atmosphere of other wavelengths; and inverting the transmittance of the whole atmosphere. The method has the advantages that: inversion of the transmittance of the whole atmosphere in ultraviolet, visible and infrared bands is realized by using a multi-band solar radiometer and atmospheric model or local atmospheric measured data and high-resolution atmospheric absorption optical depth computation software; and the problem about measurement of the laser transmittance of the whole atmosphere in a broad spectrum is solved.

Description

technical field [0001] The invention relates to atmospheric optics, in particular to a method for inversion of the entire layer of atmospheric transmittance by using a multi-wavelength solar radiometer and high-resolution atmospheric transmittance calculation software. Background technique [0002] The solar radiometer uses the sun as the light source to measure the direct solar radiation transmitted through the entire atmosphere, and is mainly used for the detection of atmospheric aerosols. NASA of the United States established the automatic atmospheric aerosol observation network AERONET by using the CE318 solar pyranometer produced by the French CIMEL company, and deployed more than 180 ground-based solar pyranometers around the world, mainly for atmospheric aerosol radiation climate research, and also for satellites. The system remote sensing analysis results provide support and verification. The China Meteorological Administration has built a national monitoring networ...

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Application Information

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IPC IPC(8): G01N21/59
Inventor 强希文李志朝刘晶儒吴敏常金勇李岩罗振莹
Owner NO 63655 TROOPS OF THE CHINESE PEOPLES LIBERATION ARMY
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