Broadening correcting method of atmospheric pressure for differential absorption atmospheric CO2 laser radar

A differential absorption and laser radar technology, applied in the field of atmospheric optics, can solve problems such as no solutions, achieve fast calculation speed, improve inversion accuracy, and eliminate uncertainties

Active Publication Date: 2013-01-16
WUHAN UNIV
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Problems solved by technology

[0011] There is no relevant solu

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  • Broadening correcting method of atmospheric pressure for differential absorption atmospheric CO2 laser radar
  • Broadening correcting method of atmospheric pressure for differential absorption atmospheric CO2 laser radar
  • Broadening correcting method of atmospheric pressure for differential absorption atmospheric CO2 laser radar

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Embodiment Construction

[0030] The technical solutions of the present invention are described in detail below through examples.

[0031] Example of a Differential Absorption of Atmospheric CO 2 The lidar atmospheric pressure broadening correction method can be calculated by computer software to realize automatic operation, including the following steps:

[0032] Step 1, calculate the Lorentz full width at half maximum using the following formula,

[0033] γ L ( P , T , λ ) = P × { b L ( air , λ ) × ( 1 - χ ) × [ T 0 T ...

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Abstract

The invention relates to a broadening correcting method of atmospheric pressure for differential absorption atmospheric CO2 laser radar. The broadening correcting method is characterized in that a correction formula which is sensitive to the wavelength is adopted to calculate Lorentz full width at half maximum (FWHM); considering both the broadening factor and the independence of temperature related index, the problem of a mixture ratio dynamic value of high altitude CO2 is solved by adopting two ideas of direct value taking and iteration solution; and the ratio x, namely differential absorption laser radar equation concentration solution, of CO2 molecule concentration and volume is transformed. With the adoption of the broadening correcting method, the uncertainty of taking values of the classical algorithm is abandoned to the maximum extent so as to avoid bringing new errors; meanwhile according to the experimental scene demands, the method of specifically adopting value taking solution or iteration has the advantage of flexibility and has good application prospect and great development potential in the field of differential absorption laser radar for detecting atmospheric CO2.

Description

technical field [0001] The invention relates to the field of atmospheric optics, in particular to a differential absorbing atmospheric CO 2 Correction method for lidar atmospheric pressure broadening. Background technique [0002] CO 2 As the main component of greenhouse gases, it has an important impact on the global climate, and changes in its concentration will have an important impact on the global climate. by CO 2 The real-time monitoring of the concentration can independently and timely obtain comprehensive and reliable regional CO 2 Source-sink dynamic information to cope with the growing pressure on carbon emissions. Differential absorption lidar in the detection of CO 2 It is an ideal detection device for observing its vertical profile distribution, which can provide continuous time and space observations and obtain high temporal and spatial resolution. For differential absorption lidar, the available signal is the absorption of laser beam energy by detected a...

Claims

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Application Information

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IPC IPC(8): G01S7/497
Inventor 龚威马昕马盈盈林宏李俊
Owner WUHAN UNIV
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