A self-correcting rotating Raman lidar temperature measurement system and its inversion method

Abstract

The self-correcting rotating Raman lidar temperature measurement system and its inversion method disclosed in the present invention include sequentially connected pulse lasers and collimated beam expanders, and are sequentially arranged with beam splitters, reflectors and A photoelectric detector is arranged on the direction of the reflective light path of the spectroscopic mirror, and a telescope is also included. The output light port of the telescope is fixed with a fiber optic coupler, and the reflector is located at the barrel mouth of the telescope. The relative detection system and the system control processing platform of the first-level spectral spectroscopy, and the absolute detection system of the second-level spectral spectroscopy are also connected between the first-level spectral spectroscopy system and the system control processing platform, and the system control processing platform is respectively connected with the pulse laser and the photoelectric detector . It has the advantages of long relative detection distance and no correction for absolute detection. It has the ability to detect during the day and can realize self-correcting atmospheric temperature remote sensing detection throughout the day.

Description

technical field [0001] The invention belongs to the technical field of remote sensing temperature measurement systems, and relates to a self-correcting rotating Raman laser radar temperature measuring system, and also relates to an inversion method of the self-correcting rotating Raman laser radar temperature measuring system. Background technique [0002] Atmospheric temperature is one of the important atmospheric state parameters. At present, since the rotating Raman lidar uses the Raman scattering signal of the atmosphere to invert the atmospheric temperature, it can eliminate the influence of aerosol extinction at the bottom of the atmosphere, so it is especially suitable for detecting the tropospheric atmospheric temperature profile . However, the existing rotating Raman lidar system needs the experimental data of parallel equipment such as radiosondes for data correction, which is not conducive to the atmospheric temperature detection of rotating Raman lidar as an inde...

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Problems solved by technology

Although it solves the problem that rotating Raman lidar requires parallel instrument calibration, it is difficult to extend the detection distance to the tropopause because the system uses single-mode fiber fiber grating technology

In addition, since the system does not efficiently filter out solar background noise, remote sensing of daytime temperature profiles cannot be carried out

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