An inversion method of aerosol extinction coefficient based on UAV atmospheric lidar

A technology of laser radar and extinction coefficient, which is applied in radio wave measurement system, climate sustainability, re-radiation of electromagnetic waves, etc., can solve problems such as inaccurate parameter values ​​and inversion errors

Active Publication Date: 2022-07-15
OCEAN UNIV OF CHINA
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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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  • An inversion method of aerosol extinction coefficient based on UAV atmospheric lidar
  • An inversion method of aerosol extinction coefficient based on UAV atmospheric lidar
  • An inversion method of aerosol extinction coefficient based on UAV atmospheric lidar

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Embodiment Construction

[0012] The purpose of the present invention is to provide an aerosol extinction coefficient inversion method based on UAV atmospheric lidar, so as to solve the technical problems in the related fields.

[0013] The detection principle of the aerosol extinction coefficient inversion method based on the UAV atmospheric laser radar of the present invention figure 1 shown. The atmospheric lidar transmitting unit (2) includes: a control unit, a pulsed laser and a laser transmitting system, and the atmospheric lidar receiving unit (3) includes: a laser receiving system, a photoelectric detection and data acquisition system, and a data processing system. is the sum of the rising heights of n segments, the atmospheric lidar is mounted on the UAV (1), and the diffuse reflector (4) is placed at the ground target position. After the UAV (1) lifts up to a fixed height, the atmospheric lidar transmits the unit (2) Aim downward at the diffuse reflector (4) at the target position; using the...

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Abstract

The aerosol extinction coefficient inversion method based on UAV atmospheric lidar includes the following steps: Step 1, place a diffuse reflector at the ground target position, and then align the laser emission system with the diffuse reflector after the UAV atmospheric lidar lifts off to a fixed height , emit laser pulses perpendicular to the diffuse reflector; in step 2, the laser receiving system receives the backscattered signal, the photoelectric detection and data acquisition system converts and collects the signal, and then the data processing system calculates the UAV atmospheric lidar to diffuse Atmospheric optical parameters between the reflectors; step 3, the UAV atmospheric lidar rises to a fixed height n times, and repeats step 2 n times to obtain the atmospheric transmittance and optical thickness of the corresponding height, and then obtain the situation of the aerosol extinction coefficient Step 4: During the descending process, the UAV atmospheric lidar can hover at a fixed height n times, and repeat step two n times; it is equivalent to repeating the measurement during the ascent process, and the accuracy of the result can be improved by increasing the number of measurements.

Description

technical field [0001] The invention relates to an aerosol extinction coefficient inversion method based on an unmanned aerial vehicle atmospheric laser radar, and more particularly belongs to a method for inverting the aerosol extinction coefficient by using an unmanned aerial vehicle and an atmospheric laser radar. Background technique [0002] Atmospheric Lidar (Atmospheric Lidar) is an active optical remote sensing detection technology, which is used to detect the spatiotemporal 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, atmospheric pollution monitoring, weather forecasting, and climate model research. The Fernald method is commonly used in the meter scattering lidar to retrieve the aerosol extinction coeffici...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S17/95G01S7/48
CPCG01S17/95G01S7/4802Y02A90/10
Inventor 宋小全王晓磊刘金涛张凯临吴松华
Owner OCEAN UNIV OF CHINA
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