Sodium fluorescence Doppler laser radar and method for measuring wind field and temperature of atmosphere

A technology of Doppler laser and atmospheric wind field, applied in the field of atmospheric detection, can solve the problems of complex structure of sodium atomic magneto-optical filter, limited promotion and use, stability restriction and so on

Active Publication Date: 2016-11-09
NAT SPACE SCI CENT CAS
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Problems solved by technology

Due to the complex structure of the sodium atom magneto-optical filter, its stability is restricted by various factors such as

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  • Sodium fluorescence Doppler laser radar and method for measuring wind field and temperature of atmosphere
  • Sodium fluorescence Doppler laser radar and method for measuring wind field and temperature of atmosphere
  • Sodium fluorescence Doppler laser radar and method for measuring wind field and temperature of atmosphere

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[0055] A sodium fluorescence Doppler lidar and method for measuring atmospheric wind field and temperature according to the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0056] The study found that at the laser emission wavelength of 589nm of sodium fluorescence Doppler lidar, iodine molecules have absorption spectral lines, which can be used to detect Doppler frequency shift and broadening of atmospheric scattering signals. Encapsulate a certain amount of iodine molecules in a transparent bubble and heat them to make an iodine molecular absorption spectrometer. Due to factors such as Doppler broadening and pressure broadening, the iodine molecular absorption spectrum has a certain width, such as figure 1 The iodine molecular absorption line 1 shown in , forms a "U" shape. Its transmittance to atmospheric scattering signals of different frequencies and widths is also different, so the Doppler frequency shi...

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Abstract

The invention provides a sodium fluorescence Doppler laser radar and method for measuring the wind field and temperature of the atmosphere. According to the invention, part of the scattering signals of the atmosphere that are received by the sodium fluorescence Doppler laser radar are separated and permeate an iodine molecule absorption spectrometer, and the light intensity of the Rayleigh scattering signals of the atmosphere is detected by using the absorption lines at 589 nm of the iodine molecules so as to measure the wind velocity and temperature information of the atmosphere corresponding to the Rayleigh scattering signals of the atmosphere, such that the exploration height of the sodium fluorescence Doppler laser radar is expanded from the mesopause of the atmosphere to the stratosphere and the troposphere, which expands the exploration range of the sodium fluorescence Doppler laser radar to the atmosphere.

Description

technical field [0001] The invention relates to the technical field of atmospheric detection, in particular to a sodium fluorescence Doppler lidar and a method for measuring atmospheric wind field and temperature. Background technique [0002] In the measurement of atmospheric wind field and temperature by laser, 589nm laser has been applied to sodium fluorescence Doppler lidar. The narrow-linewidth 589nm laser emitted by the sodium fluorescence Doppler lidar causes the sodium atoms in the top region of the mesosphere (about 75-105km) to generate resonance fluorescence, and the atmospheric wind field is obtained by receiving and analyzing the Doppler frequency shift and broadening of the resonance fluorescence and temperature. [0003] In 1990, Colorado State University and the University of Illinois jointly established the world's first sodium fluorescence Doppler lidar to detect the atmospheric temperature in the mesotope region (about 75-105km). In 2002, the sodium fluo...

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Application Information

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IPC IPC(8): G01S17/95
CPCG01S17/95Y02A90/10
Inventor 闫召爱胡雄郭文杰
Owner NAT SPACE SCI CENT CAS
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