System and method for measuring constant of atmospheric refractive index imaginary part structure

A technique of atmospheric refractive index and structure constant, which is applied in the measurement of phase influence characteristics, etc., can solve the problems such as the inability to objectively give the value of the structure constant of the imaginary part of the refractive index, the fluctuation of the spectral density, and the inability to objectively determine the position of the transition frequency.

Active Publication Date: 2014-12-24
UNIV OF SCI & TECH OF CHINA
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Problems solved by technology

Due to the limitation of the sampling time length, the spectral density has large fluctuations in the low frequency part, and the position of the transiti...

Method used

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  • System and method for measuring constant of atmospheric refractive index imaginary part structure
  • System and method for measuring constant of atmospheric refractive index imaginary part structure
  • System and method for measuring constant of atmospheric refractive index imaginary part structure

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Embodiment Construction

[0067] like figure 1 As shown, the system for measuring the structural constant of the imaginary part of the atmospheric refractive index implemented in the present invention includes a transmitting end, a receiving end and a data acquisition, storage and processing unit.

[0068] The transmitting end includes a modulator, a driving power supply, a light-emitting diode and an emitting lens. The modulator modulates the driving power. The driving power supplies power to the light-emitting diodes, and the light beams emitted by the light-emitting diodes are emitted into the atmosphere through the emitting lens, such as figure 2 shown. The transmitting end of the present invention adopts a group of LED lamps as the light source, and the power supply part of the LED lamps is modulated so that the emitted light beam avoids the interference of the background light. The modulation frequency can be 2-120KHz. The light emitted by the LED lamp is converged by the emitting lens for t...

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Abstract

The invention relates to a system and a method for measuring the constant of an atmospheric refractive index imaginary part structure. The system comprises a transmitting terminal, a receiving terminal and a data acquisition, storage and processing unit, wherein the transmitting terminal comprises a modulator, a driving power, a light-emitting diode and a divergent lens, and the modulator is used for modulating the driving power; the receiving terminal comprises a receiving lens, a photodiode, a temperature stabilizing liner, a pre-amplifier, a detector and a low-frequency amplifier; the data acquisition, storage and processing unit comprises a data acquisition unit, a storage device and a data processing module. The system and the method are capable of accurately and objectively measuring the constant of the atmospheric refractive index imaginary part structure.

Description

technical field [0001] The invention relates to atmospheric detection equipment, in particular to a measurement system and method for the structural constant of the imaginary part of the refractive index of the atmosphere. Background technique [0002] The structural constant of the imaginary part of the atmospheric refractive index is mainly used to understand the spatial variation of the imaginary part of the atmospheric refractive index, and is further used to measure the transport flux of atmospheric components (gases and aerosols). [0003] The value of the effective refractive index of the atmosphere is related to the wavelength of the light source and the composition in the atmosphere. Atmospheric effective refractive index includes two parts: real part and imaginary part. In addition to gas components, the atmosphere also contains clouds and other aerosol particles. When light waves propagate in the atmosphere, they are scattered and absorbed by gas molecules, clou...

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Application Information

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IPC IPC(8): G01N21/41
Inventor 袁仁民曾宗泳傅云飞
Owner UNIV OF SCI & TECH OF CHINA
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