Method for correcting low-layer extinction coefficient profile of laser radar

Abstract

The invention discloses a method for correcting a low-layer extinction coefficient profile of a laser radar. The method comprises the steps that firstly, a multi-axis differential absorption spectrometer and the laser radar are simultaneously adopted to measure aerosol extinction coefficient data of a lower atmosphere layer; then the aerosol extinction coefficient data measured by the multi-axis differential absorption spectrometer and the laser radar are calculated to obtain extinction coefficient profile data measured by the multi-axis differential absorption spectrometer and extinction coefficient profile data measured by the laser radar; and finally, the extinction coefficient profile data measured by the multi-axis differential absorption spectrometer are processed and then serve as atmosphere extinction coefficient profile data measured by the multi-axis differential absorption spectrometer, the extinction coefficient profile data obtained before and measured by the laser radar are corrected, and thus the corrected low-layer extinction coefficient profile of the laser radar are corrected. The method has the advantages that the method is simple and efficient, the error of thelow-layer extinction coefficient profile data can be reduced, and the measuring cost can be reduced.

Description

technical field [0001] The invention belongs to the technical field of atmospheric scientific detection, and in particular relates to a correction method for a laser radar low-layer extinction coefficient profile. Background technique [0002] Aerosols refer to solid or liquid particles suspended in the atmosphere and play an important role in the atmospheric system. Aerosol particles scatter and absorb radiation, affecting the optical properties, lifetime and formation of clouds. The direct emission of soot particles, as well as the formation and condensation of secondary organic aerosols and the formation of harmful gases that aerosols participate in will affect air quality and human health. With the improvement of human living standards, the total amount of aerosols produced by human factors has increased, which has caused serious harm to our living environment. Most of the aerosols originate from the ground, and the main aerosol content in the troposphere is extremely ...

AI Technical Summary

Problems solved by technology

However, in the process of detecting the characteristics of atmospheric aerosols, lidar will cause unavoidable systematic errors to the measurement results due to the limitations of the system itself. A part is effectively used, called the geometric overlap factor of lidar, because this systematic error will produce measurement error at the close range of the detection

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