Method for fitting and inversing sea level horizontal atmosphere extinction coefficient

Abstract

The invention discloses a method for fitting and inversing a sea level horizontal atmosphere extinction coefficient, belonging to the atmosphere optical measurement field. The method for fitting and inversing a sea level horizontal atmosphere extinction coefficient comprises steps of calculating to obtain a slop method extinction coefficient and a Fernald method extinction coefficient, comparing a slop method extinction coefficient with a Fernald method extinction coefficient in order to determine uniformity of the sea level horizontal atmosphere extinction coefficients , if the sea level horizontal atmosphere extinction coefficients are not uniform, performing re-segmentation on whole segment echo signal data, calculating the goodness of fit of each data segmentation, segmenting a data segment corresponding to a maximum fit goodness value to obtain an optimal boundary value fitting area, adopting a double-component fitting method to fit an extinction coefficient boundary value in an optimal boundary value fitting area, taking the boundary value of the extinction coefficient as a boundary value of inversion, adopting the Fernald method to perform iteration inversion to obtain the extinction coefficient value of each data segment so as to obtain an extinction coefficient profile. The method for fitting and inversing sea level horizontal atmosphere extinction coefficient is applicable to measuring sea level non-uniform horizontal atmosphere extinction coefficients.

Description

technical field [0001] The invention belongs to the field of atmospheric optical measurement, more specifically, a method for measuring the horizontal extinction coefficient profile of the marine atmospheric aerosol based on an improved Mie-type scattering laser radar. Background technique [0002] In recent years, with the rapid development of the economy, the damage to the environment has become more and more serious, especially the air pollution has seriously affected people's health and daily life. Therefore, it is more important to study the atmosphere. [0003] The well-known atmospheric visibility (Visibility), which can reflect the transparency of the atmosphere, is one of the physical quantities related to atmospheric detection. Atmospheric visibility is an important element of meteorological observation. The forecast of visibility value is not only used for weather analysis of meteorological departments, but also widely used in aviation, navigation, expressway and ...

AI Technical Summary

Problems solved by technology

The distance range of lidar for aerosol detection is usually on the order of kilometers. If the atmosphere is evenly distributed in the presence of sea fog, it is obviously impossible to obtain accurate aerosol extinction coefficient values.

Images