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Automatic processing method for atmospheric detection laser radar

A technology of laser radar and atmospheric detection, which is applied in the field of measurement and testing, can solve the problems such as the inability to automatically select the reference height of molecules, and achieve the effect of solving backscattering coefficient inversion errors, improving data processing speed, and avoiding time costs

Active Publication Date: 2021-03-16
BEIJING RES INST OF TELEMETRY +1
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention aims to solve the problem that the molecular reference height cannot be automatically selected during laser radar data inversion, and provides an automatic processing method for atmospheric detection laser radar, which combines effective signal detection, molecular layer signal screening and wavelet transform cloud layer identification, It has the advantages of no need for manual intervention, fast processing speed, and accurate inversion results

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  • Automatic processing method for atmospheric detection laser radar
  • Automatic processing method for atmospheric detection laser radar
  • Automatic processing method for atmospheric detection laser radar

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Effect test

Embodiment 1

[0056] Such as figure 1 As shown, an automatic processing method for atmospheric detection lidar comprises the following steps:

[0057] S1. Radar signal correction: The signal correction module performs detector response correction and geometric overlap factor correction on the original echo signal of the atmospheric detection lidar to obtain the corrected laser radar signal and the signal-to-noise ratio of the corrected laser radar signal. The linearity of the radar signal is consistent;

[0058] S2. Distance correction: the preprocessing module performs background removal and distance correction on the corrected lidar signal to obtain a distance correction signal;

[0059] S3. Determine the furthest detection distance: the automatic processing module determines the furthest detection distance of the effective signal of the atmospheric detection lidar according to the signal-to-noise ratio, compares the furthest detection distance with the minimum distance of the molecular ...

Embodiment 2

[0065] Such as figure 1 As shown, an automatic processing method for atmospheric detection lidar comprises the following steps:

[0066] S1. Radar signal correction: The signal correction module performs detector response correction and geometric overlap factor correction on the original echo signal of the atmospheric detection lidar to obtain the corrected laser radar signal and the signal-to-noise ratio of the corrected laser radar signal. The linearity of the radar signal is consistent;

[0067] The signal correction module performs detector response correction on the original echo signal through the detector pulse stacking correction curve;

[0068] Such as figure 2 As shown, step S1 includes the following steps:

[0069] S11. Obtain the corrected laser radar signal: the atmospheric detection laser radar adopts the photon counting mode for signal acquisition and processing. When the photoelectric pulse output by the detector appears pulse stacking, use the pre-correcte...

Embodiment 3

[0099] Such as figure 1 As shown, an automatic processing method for atmospheric detection lidar comprises the following steps:

[0100] S1. Radar signal correction: The signal correction module performs detector response correction and geometric overlap factor correction on the original echo signal of the atmospheric detection lidar to obtain the corrected laser radar signal and the signal-to-noise ratio of the corrected laser radar signal. The linearity of the radar signal is consistent;

[0101] The signal correction module performs detector response correction on the original echo signal through the detector pulse stacking correction curve;

[0102] Such as figure 2 As shown, step S1 includes the following steps:

[0103] S11. Obtain the corrected laser radar signal: the atmospheric detection laser radar adopts the photon counting mode for signal acquisition and processing. When the photoelectric pulse output by the detector appears pulse stacking, use the pre-corrected ...

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Abstract

The invention provides an automatic processing method for an atmospheric detection laser radar. The method comprises the following steps: radar signal correction, distance correction, determination ofthe farthest detection distance of an effective echo signal of the laser radar according to a signal-to-noise ratio, calculation of an atmospheric molecular signal according to a standard atmosphericmodel, determination of an atmospheric molecular layer according to the laser radar signal and the atmospheric molecular signal, determination of a cloud layer through wavelet transformation, detection of the signal-to-noise ratio through integration of effective signals, determination of the aerosol-free height range needed for calculating optical parameters through a molecular layer and the cloud layer, and calculation of a back scattering coefficient / extinction coefficient through a Fernald or Klett method according to the determined aerosol-free height range. The method combines effectivesignal detection, molecular layer signal screening and wavelet transform cloud layer identification, and has the advantages of no need of manual intervention, high processing speed and accurate inversion result. The method is suitable for a vertical detection mode and an oblique range measurement mode of the atmospheric detection laser radar, and can effectively improve the data inversion speed of a backscattering coefficient or an extinction coefficient.

Description

technical field [0001] The invention relates to the technical field of measurement and testing, in particular to an automatic processing method for atmospheric detection laser radar. Background technique [0002] Atmospheric aerosols and clouds play an important role in the process of global climate and environmental change, and have an important impact on the atmospheric environment, climate radiation and light transmission in the atmosphere. The measurement and study of the scattering and absorption characteristics, transformation characteristics and their temporal and spatial distribution of aerosols have become a common problem in climate, environment and atmospheric research. [0003] As an active remote sensing device, laser radar has the characteristics of high collimation, high monochromaticity, and high brightness, so that the detection of the atmosphere by laser radar has many advantages that other instruments do not have. Compared with radio radar and microwave r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/48G01S7/497G01S17/95
CPCG01S7/4802G01S7/497G01S17/95Y02A90/10
Inventor 赵一鸣王丽东潘超胡涛涛商雅楠郭畅于勇李凉海
Owner BEIJING RES INST OF TELEMETRY