Aerosol scattering coefficient and laser radar combined observation aerosol vertical profile correction method and device

By identifying aerosol layer boundaries and constructing a parameterized model of the correction factor, combined with multiple observation heights and lidar system constants, the inconsistency problem of the vertical profile of aerosol scattering coefficient in lidar systems was solved, achieving a more stable and reliable correction effect.

CN121679534APending Publication Date: 2026-03-17SHOU COUNTY METEOROLOGICAL BUREAU
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Patent Information

Application Number
CN202511957463.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-12-23
Publication Date
2026-03-17

AI Technical Summary

Technical Problem

Existing technologies struggle to establish effective correction mechanisms when there are uncertainties in the constants of lidar systems and near-field geometric overlap, as well as variations in aerosol stratification. This results in inconsistencies between the vertical profile of the aerosol scattering coefficient and echo observations across the entire height range, affecting the stability and reliability of profile correction.

Method used

By preprocessing the echo signal to identify the aerosol layer boundary, constructing a parameterized model of the correction factor, and solving for the consistency target across the entire altitude range, geometric overlap compensation is performed by combining measured values ​​from multiple observation altitudes and constant parameters of the lidar system to achieve stable correction of the vertical profile of the aerosol scattering coefficient.

Benefits of technology

It improves the overall consistency and reliability of the correction results, enhances the adaptability to hierarchical abrupt change scenarios, reduces near-ground errors, reduces system constant uncertainty and noise impact, and improves the method's anomaly resistance and stability.

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Abstract

The invention relates to the technical field of atmospheric environment monitoring and optical detection, in particular to an aerosol vertical profile correction method and device for aerosol scattering coefficient and laser radar combined observation, and the method comprises the steps: S1, collecting echoes according to an integral window, and obtaining distance correction echoes; s2, collecting a height scattering coefficient greater than or equal to 2, and aligning the height scattering coefficient with a distance correction echo grid / time; s3, background deduction, resolution matching and invalid height elimination are carried out to obtain preprocessed echoes; s4, generating an initial scattering coefficient profile; s5, identifying layered boundary division layer intervals; s6, establishing a correction factor model for each layer, adding overlap compensation to the near earth, and introducing a system constant; s7, taking the consistency of the total height of the theoretical echo and the preprocessed echo as a target, taking the consistency of multi-height scattering coefficients as a constraint, and carrying out joint solving to obtain correction factor distribution; and S8, outputting a correction profile, boundary information and a parameter set. According to the method, system constants and overlap compensation are solved by preprocessing echo layering scale gradient correction factors through combination of full-height consistency and two-height actual measurement constraints, and a correction profile is stabilized.
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