Medium and low altitude air composition limb detecting method

A detection method and atmospheric technology, applied in the field of atmospheric physical detection, can solve the influence and limitation of surface albedo, generally only reach the bottom of the stratosphere, etc., and achieve the effect of high sensitivity and improved resolution

Inactive Publication Date: 2011-07-27
JILIN UNIV
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  • Application Information

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Problems solved by technology

Due to the limitations of conventional atmospheric composition spectrum detection technology, even if an airship or other low-altitude aircraft is used as a platform, it only uses the ascent process of the airship for one-time observation. At a height of about 10km at the bottom of the stratosphere, it is obviously affected by the surface albedo in the atmospheric profile inversion

Method used

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  • Medium and low altitude air composition limb detecting method
  • Medium and low altitude air composition limb detecting method
  • Medium and low altitude air composition limb detecting method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The imaging spectrometer is fixed on the airship platform equipped with a stepping motor through bolts, and the airship flies according to the predicted route. When the airship rises to the height of detecting the target atmosphere, the ground computer system remotely controls the stepping motor through wireless communication, and the imaging spectrometer is on the ground. Driven by the stepping motor, the imaging spectrometer is continuously rotated at 0-360° in the horizontal direction at the altitude of the airship, and the atmospheric backscattered light is continuously collected and imaged;

[0035] The imaged spectral signal is stored in the ground computer system through wireless transmission, after A / D conversion, the spectral data is analyzed and processed, and the atmospheric composition information in the horizontal direction at the corresponding height is obtained through atmospheric composition inversion calculation, and then the detection range is obtained. ...

Embodiment 2

[0037] The imaging spectrometer is fixed on the airship platform equipped with a stepping motor through bolts, and the airship flies according to the predicted route. When the airship rises to the height of detecting the target atmosphere, the ground computer system remotely controls the stepping motor through wireless communication, and the imaging spectrometer is on the ground. Under the control of the stepping motor, the imaging spectrometer is positioned in the horizontal direction of the altitude of the airship, and the center axis of the imaging spectrometer lens is the center line of the 30° included angle range to collect atmospheric backscattered light and form an image;

[0038] The imaged spectral signal is stored in the ground computer system through wireless transmission, after the A / D conversion, the spectral data is analyzed and processed, and the corresponding altitude is obtained through the inversion calculation of the atmospheric composition. Atmospheric comp...

Embodiment 3

[0040]The imaging spectrometer is fixed on the airship platform equipped with a stepping motor through bolts, and the airship flies according to the predicted route. When the airship rises to the height of detecting the target atmosphere, the ground computer system remotely controls the stepping motor through wireless communication, and the imaging spectrometer is on the ground. Under the control of the stepping motor, make the imaging spectrometer discontinuously collect and image the atmospheric backscattered light at intervals of 10° in the horizontal direction of the altitude of the airship, with the imaging spectrometer as the center;

[0041] The imaged spectral signal is stored in the ground computer system through wireless transmission, after A / D conversion, the spectral data is analyzed and processed, and the atmospheric composition at the horizontal direction of the corresponding height is obtained every 10° through the inversion calculation of the atmospheric composit...

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Abstract

The invention relates to atmospheric physical sounding, in particular to a limb sounding method for low-to-medium altitude atmospheric compositions. An imaging spectrometer is carried through an airship platform with a stepping motor; a ground computer system remotely controls the imaging spectrometer through wireless communication to perform continuous or discontinuous atmosphere acquisition in horizontal direction or vertical direction according to the resident height of an airship, scatter the light backward and image after the airship rises to a height for sounding target atmosphere; and a spectral signal after the imaging is stored to the ground computer system through wireless transmission further to obtain atmospheric chemical compositions within the sounding range through spectraldata analysis and treatment. The method can reduce the influence of surface albedo on the section inversion of the atmospheric compositions, improve the surface coverage range in the horizontal surface and the resolution in vertical direction, can also flexibly select the height range of section sounding of the atmospheric compositions, and realize continuous, large-area, and high-accuracy sounding of sections of the atmospheric compositions.

Description

Technical field: [0001] The invention relates to atmospheric physical detection, in particular to limb detection of atmospheric components in middle and low altitudes. Background technique: [0002] The detection of the vertical distribution of atmospheric components is of great significance to the study of atmospheric components, especially the spatial distribution, transport and evolution of pollution or greenhouse gases. [0003] The existing detection of low-altitude atmospheric components from satellite remote sensing can be geometrically divided into three methods: vertical detection, limb detection and occultation detection. From the detection mechanism, it can be divided into multi-beam spectral remote sensing and single laser source harmonic remote sensing. Spectral remote sensing that is being used and developed includes Fourier transform infrared spectroscopy, differential optical absorption spectroscopy, differential absorption lidar and laser long-range absorpt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/25
Inventor 陈圣波汪自军
Owner JILIN UNIV
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