Aerosol extinction coefficient inversion method based on unmanned aerial vehicle atmospheric laser radar

Abstract

An aerosol extinction coefficient inversion method based on an unmanned aerial vehicle atmospheric laser radar comprises the following steps: step 1, a diffuse reflection plate is placed at a ground target position, a laser emission system is aligned with the diffuse reflection plate after the unmanned aerial vehicle atmospheric laser radar lifts off to a fixed height, and laser pulses are emitted perpendicular to the diffuse reflection plate; step 2, a laser receiving system receives a back scattering signal, a photoelectric detection and data acquisition system performs signal conversion and acquisition, and then a data processing system calculates atmospheric optical parameters between the unmanned aerial vehicle atmospheric laser radar and the diffuse reflection plate; step 3, the unmanned aerial vehicle atmosphere laser radar ascends to the fixed height n times, the step 2 is repeated n times, the atmosphere transmittance and the optical thickness of the corresponding height are obtained, and then the aerosol extinction coefficient condition is obtained; step 4, the unmanned aerial vehicle atmosphere laser radar can hover at a fixed height for n times in the descending process, and the step 2 is repeated for n times; the measurement in the rising process is repeated, and the accuracy of the result is improved by increasing the number of times of measurement.

Description

technical field [0001] The invention relates to an aerosol extinction coefficient inversion method based on an unmanned aerial vehicle atmospheric lidar, and more specifically belongs to a method for inverting an aerosol extinction coefficient by using an unmanned aerial vehicle and an atmospheric lidar. Background technique [0002] Atmospheric Lidar (Atmospheric Lidar) is an active optical remote sensing detection technology that can detect the temporal and spatial distribution of aerosol extinction coefficient, backscattering coefficient, depolarization ratio and particle size characteristics, atmospheric temperature and humidity, and atmospheric gas concentration. These atmospheric parameters are of great significance to atmospheric chemistry, atmospheric radiation, air pollution monitoring, weather forecasting, and climate model research. The Fernald method is commonly used to invert the aerosol extinction coefficient of m-scattering lidar. This detection method needs t...

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Problems solved by technology

The Fernald method is commonly used to invert the aerosol extinction coefficient of m-scattering lidar. This detection method needs to set the ratio of atmospheric aerosol lidar. The change of the set parameters will lead to inaccurate values, which will lead to large inversion errors

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