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Method and system for measuring atmospheric temperature based on Doppler broadening

A technology of Doppler broadening and atmospheric temperature, which is applied in radio wave measurement systems, thermometer applications, thermometers, etc., can solve the problem of low vertical distance resolution, inability to continuously and accurately monitor changes in atmospheric temperature, and low temporal and spatial resolution to achieve accurate measurement results, suitable for large-scale space observation, and simple operation

Pending Publication Date: 2019-10-01
NANJING UNIV OF INFORMATION SCI & TECH
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of the low temporal and spatial resolution of conventional air temperature in-situ measurement and the low vertical distance resolution of satellite remote sensing detection, which cannot continuously and accurately monitor atmospheric temperature changes. The present invention utilizes laser radar to emit 355nm The laser, the laser interacts with atmospheric molecules, and atmospheric scattering will cause Doppler broadening of the laser spectrum. The laser radar receiving system adds a Fabry-Perot (FP) interferometer to measure the spectral line broadening of the scattered echo signal of the laser radar. The technique measures spectral broadening, and according to the correlation between atmospheric temperature and spectral broadening, the atmospheric temperature at different heights can be obtained

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  • Method and system for measuring atmospheric temperature based on Doppler broadening
  • Method and system for measuring atmospheric temperature based on Doppler broadening
  • Method and system for measuring atmospheric temperature based on Doppler broadening

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Embodiment Construction

[0041] In order to better illustrate the specific solutions and algorithms involved in the present invention, the present invention will be described in detail below with reference to the accompanying drawings.

[0042] The present invention adopts the following technical solutions for solving the above-mentioned technical problems:

[0043]A lidar system for measuring atmospheric temperature profile mainly includes a lidar transmitting system, a lidar receiving system and a main control system. Among them, the laser radar transmitting system includes a laser 1, a beam expander 2, and a 45° total reflection mirror 3; the laser radar receiving system includes a telescope 4, a small aperture plate 5, a 45° total reflection mirror 6, a filter 7, and an FP interferometer. 8. Beam reducer 9, convergent lens 10, 16-channel photodetector 11, signal acquisition module and main control system; the photoelectric detector is connected with the signal acquisition module, and the signal ac...

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Abstract

The invention discloses a method for measuring atmospheric temperature based on Doppler broadening, and the method emits laser, receives an atmospheric scattered echo signal, images by FP interferometer stripe, measures spectral broadening, and calculates the atmosphere temperature at different heights by using the spectral broadening. The method for measuring atmospheric temperature based on Doppler broadening provided by the invention is simple in operation and small in calculation amount, can realize the temperature measurement from low altitude to high altitude, and is stable in echo signals and accurate in measurement results.

Description

technical field [0001] The invention belongs to the field of atmospheric science, in particular to the field of laser radar detection technology, and uses the broadening of the laser spectrum by atmospheric scattering to detect the atmospheric temperature profile. Background technique [0002] Air temperature is the most basic element of the atmosphere, and its temporal and spatial distribution and changes have an important impact on atmospheric pressure, wind, humidity, weather, and climate. As one of the important meteorological elements, temperature is an important parameter for current weather diagnostic analysis, weather forecast and atmospheric monitoring. Atmospheric temperature profiles can not only be used to initialize and evaluate numerical forecast models, but also to judge atmospheric stability and forecast short-term strong convective weather. At the same time, the temperature fluctuations and fluctuations directly affect the interaction between solar radiatio...

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Application Information

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IPC IPC(8): G01S17/95G01K13/02G01K11/00G01K13/024
CPCG01S17/95G01K13/02G01K11/006G01K13/024Y02A90/10
Inventor 卜令兵林雪飞
Owner NANJING UNIV OF INFORMATION SCI & TECH
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