A measurement system and method for the structural constant of the imaginary part of the atmospheric refractive index

A technology of atmospheric refractive index and structural constant, applied in the direction of phase influence characteristics measurement, etc., can solve the problems of spectral density fluctuation, the inability to objectively determine the transition frequency position, and the inability to objectively give the value of the structural constant of the imaginary part of the refractive index, etc.

Active Publication Date: 2016-07-27
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 transition frequency cannot be determined objectively, so the value of the structural constant of the imaginary part of the refractive index cannot be objectively given

Method used

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  • A measurement system and method for the structural constant of the imaginary part of the atmospheric refractive index
  • A measurement system and method for the structural constant of the imaginary part of the atmospheric refractive index
  • A measurement system and method for the structural constant of the imaginary part of the atmospheric refractive index

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Embodiment Construction

[0067] Such as 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 drive 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 ...

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Abstract

A measurement system and method for measuring the structural constant of the imaginary part of the atmospheric refractive index, comprising: a transmitting end, a receiving end, and a data acquisition storage and processing unit; the transmitting end includes: a modulator, a driving power supply, a light emitting diode, and an emitting lens; The driving power is modulated; the receiving end includes: receiving lens, photodiode, temperature stable pad, preamplifier, detector and low-frequency amplifier; the data acquisition storage and processing unit includes: data collector, storage device and data processing module. The invention can accurately and objectively measure the structure constant of the imaginary part of the atmospheric refractive index.

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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Patent Type & Authority Patents(China)
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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