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Method for optimizing laser radar detection atmospheric composition spectral line analysis

A technology of laser radar and component spectrum, which is applied in the directions of measuring devices, climate sustainability, electromagnetic wave re-radiation, etc., can solve the problems that cannot meet the detection requirements

Active Publication Date: 2017-03-22
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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Problems solved by technology

Since the protocol stipulates that surface fluxes are considered only over defined regions, a top-down inspection method that only detects total fluxes cannot meet the detection requirements without additional information

Method used

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  • Method for optimizing laser radar detection atmospheric composition spectral line analysis
  • Method for optimizing laser radar detection atmospheric composition spectral line analysis
  • Method for optimizing laser radar detection atmospheric composition spectral line analysis

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Embodiment Construction

[0109] As shown in the figure, a method for optimizing laser radar detection atmospheric component spectral line analysis is characterized in that the method comprises the following steps:

[0110] Step 1, establish the IPDA lidar equation for hard target reflection

[0111] The integrated path differential absorption (IPDA, Integrated Path Differential Absorption) laser radar detection method is used to detect the backward reflection signal from the hard target. The echo signal received by the detector comes from the pulse echo signal reflected by the hard target, such as figure 1

[0112] , the specific IPDA lidar equation is as follows:

[0113]

[0114]

[0115]

[0116] Equations (1) and (2) are based on the fact that the wavelength of each laser pulse is transmitted by CO 2 Optical depth due to absorption, used to calculate CO in the entire atmosphere 2 content. Receive the echo signal reflected by the ground surface through the detector,

[0117] Step 2, ...

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Abstract

The invention provides a method for optimizing laser radar detection atmospheric composition spectral line analysis, through building of an IPDA laser radar equation of hard target reflection, calculation of difference optical thickness of two pulses and CO2 air column mixing rate XCO2 with a weight, single spectral line broadening calculation, absorption cross section calculation, CO2 absorption optical thickness calculation, a weight function profile and a CO2 molecule number density profile, weight function-optimized spectral lines are obtained. The spectral lines obtained by the method have a higher lower-atmosphere weight ratio, and detection is closer to a true value.

Description

technical field [0001] The invention belongs to a method for analyzing and optimizing laser radar detection spectral lines, in particular to a spectral line optimization method for differential absorption detection of atmospheric components. . Background technique [0002] Before we can understand the contribution of greenhouse gases, clouds and aerosols to climate change, we first need to define radiative forcing. It is difficult to directly quantify the changes in surface temperature caused by fluctuations in gas or particle concentrations. Introducing radiative forcing as an intermediate quantity is essential for understanding whether CO 2 The greenhouse effect, or the complex cooling-dominated effect generated by the interaction between clouds and aerosols, is quantified in terms of changes in radiative forcing. Radiative forcing is the net change in the energy balance in the Earth system due to some forcing perturbation. It is usually expressed in terms of power per ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S17/95
CPCG01S17/95Y02A90/10
Inventor 刘东马晖王邦新王珍珠谢晨波钟志庆范爱媛董吉辉王英俭
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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