Inversion method of micro-pulse differential absorption lidar water vapor spatial and temporal distribution

Abstract

The invention discloses an inversion method of micro-pulse differential absorption lidar water vapor spatial and temporal distribution. The inversion method comprises wavelength selection of water vapor detection, calculation and correction of absorption cross sections of water vapor absorption wavelengths and non-absorption wavelengths, and inversion and calibration of water vapor concentrations. An automatic continuous detection device of the micro-pulse differential absorption lidar water vapor spatial and temporal distribution is employed to obtain characteristic backward scattering signals of water vapor absorption in specific spectral lines, the backward scattering signals are subjected to inversion and calibration by a computer utilizing a differential absorption spectrum analysis method, and high-time-resolution, high-spatial-resolution and high-precision water vapor stereo distribution data is obtained.

Description

technical field [0001] The invention relates to a data inversion method for an optical telemetry receiving device, in particular to an inversion method for automatic and continuous detection of water vapor spatiotemporal distribution by micro-pulse differential absorption laser radar, which realizes automatic and continuous monitoring of water vapor spatiotemporal distribution in the atmosphere. Background technique [0002] There is not much water vapor in the atmosphere, and it only accounts for 4% of the atmosphere at most. Water vapor only accounts for 0.001% of the total global water volume. Water vapor is a gas with the largest concentration change in the atmosphere. Water vapor plays a very important role in the environment, meteorology, climate and military fields. Most of the water vapor is concentrated in the lower layers, half of the water vapor is concentrated below 2 kilometers, and three-quarters of the water vapor is concentrated below 4 kilometers. It is of g...

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Problems solved by technology

[0004] The technical problem of the present invention is to overcome the deficiencies of the prior art, and provide an automatic and continuous detection method for the water vapor time and space distribution of the micro-pulse differential absorption laser radar, so as to solve the problem that the traditional laser radar cannot detect the water vapor concentration during the daytime, and the water vapor concentration is poor. The absorption spectrum line is too narrow and the center wavelength of the laser drifts, which leads to poor detection accuracy, and the problem that the lidar is difficult to calibrate when detecting water vapor

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