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High-spectrum-resolution total atmospheric spectral transmittance measuring method

A technology of atmospheric transmittance and measurement method, which is applied in the field of real-time measurement of atmospheric transmittance with high spectral resolution, can solve the problems of high resolution and portable measurement time, and overcome the problems of high resolution and portability. , resolution improvement, overcoming the effect of long measurement time

Inactive Publication Date: 2016-09-07
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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Problems solved by technology

This method overcomes the shortcomings of traditional Fourier transform spectrometers that cannot take into account high resolution, portability and long measurement time; compared with solar radiometers, the resolution has been greatly improved, and it can achieve fast response, real-time online measurement and hyperspectral Full-layer Atmospheric Transmittance Measurements with High Resolution

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  • High-spectrum-resolution total atmospheric spectral transmittance measuring method
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  • High-spectrum-resolution total atmospheric spectral transmittance measuring method

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Embodiment Construction

[0040] see Figure 2-Figure 3 .

[0041] The method for measuring the transmittance of the entire layer of the atmosphere with high spectral resolution is characterized in that: using a target tracking device to obtain sunlight or starlight passing through the atmosphere as signal light, and using a highly coherent narrow linewidth laser as a local oscillator laser, the transmitted The signal light passing through the atmosphere and the local oscillator laser are optically mixed in the heterodyne detector, and after passing through the intermediate frequency filter and the square law detector in turn, they are sent to the bandpass filter to filter out noise, and finally collected by the computer Obtain the heterodyne signal generated by combining the signal light through the atmosphere and the local oscillator laser beam. The heterodyne signal contains the transmittance information of sunlight or starlight through the entire atmosphere, and the Langley method is used to calibr...

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Abstract

The invention discloses a high-spectrum-resolution total atmospheric spectral transmittance measuring method. The method includes: using a target tracking device for acquiring sunlight or starlight penetrating the atmosphere as signal light, taking a high-coherence narrow linewidth laser as local oscillation laser, subjecting the signal light penetrating the atmosphere and the local oscillation laser to optical mixing in a heterodyne detector prior to passing through an intermediate-frequency filter and a square-law detector, sending to a band-pass filter to remove noise, enabling a computer to collect for obtaining a heterodyne signal generated by combination of the signal light penetrating the atmosphere and the local oscillation laser, and processing the heterodyne signal to obtain a high-resolution spectrum of weak signal light penetrating the atmosphere. The high-spectrum-resolution total atmospheric spectral transmittance measuring method is used for real-time measurement of total atmospheric spectral transmittance and applicable to fields of atmospheric optics, meteorological research, atmospheric pollution monitoring, detection and the like, and quick response and real-time measurement of high-spectrum-resolution total atmospheric spectral transmittance can be realized according to the method.

Description

technical field [0001] The invention relates to the field of high-resolution full-layer atmospheric transmittance measurement, and relates to a method for realizing real-time measurement of high-spectral resolution full-layer atmospheric transmittance based on a laser heterodyne measurement method combined with starlight tracking. The method belongs to the field of optics. Background technique [0002] The whole-layer atmospheric transmittance is an important parameter reflecting the characteristics of atmospheric radiation transfer, which is of great significance in the research of atmospheric radiation, remote sensing of earth resources, air quality monitoring, and target recognition. In particular, the measurement of high-resolution full-layer atmospheric transmittance, in addition to the above research, can also be applied to long-distance or full-layer atmospheric transmittance, multi-component greenhouse gas profile inversion and other fields. Common whole-layer atmos...

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Application Information

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IPC IPC(8): G01N21/39
CPCG01N21/39
Inventor 曹振松谈图吴庆川马宏亮黄印博刘强黄宏华朱文越高晓明饶瑞中
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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