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Micro pulse lidar system constant calibration method

A laser radar and system constant technology, applied to radio wave measurement systems, instruments, etc., can solve the problems of tedious and difficult calibration of micro-pulse laser radar constants, achieve a fast system constant calibration method, ensure consistency, and operate Effects in simple steps

Inactive Publication Date: 2013-04-17
NO 63655 TROOPS OF THE CHINESE PEOPLES LIBERATION ARMY
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Problems solved by technology

Generally speaking, the constant calibration of micropulse lidar is a tedious or difficult task

Method used

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  • Micro pulse lidar system constant calibration method
  • Micro pulse lidar system constant calibration method
  • Micro pulse lidar system constant calibration method

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Embodiment Construction

[0027] The present invention will be further described in detail below in conjunction with specific embodiments, which are explanations of the present invention rather than limitations.

[0028] A method for calibrating the laser radar system constant by using the laser radar combined with the solar radiometer is provided, and the method is suitable for the micro-pulse laser radar system.

[0029] The solar radiometer is a multi-wavelength solar radiometer, which can simultaneously measure the solar irradiance of multiple wavelength channels. The optical thickness of the entire layer of atmospheric aerosol corresponding to these wavelengths can be obtained by calculation. Assuming that the particle size distribution of the atmospheric aerosol satisfies the Jungian distribution, the optical thickness of the entire layer of atmospheric aerosol corresponding to the laser radar emission wavelength can be obtained by interpolating the measurement results. As a standard transfer de...

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Abstract

The invention discloses a micro pulse lidar system constant calibration method, which utilizes a solar radiation meter to measure and invert so as to obtain whole layer of atmospheric aerosol optical thicknesses of multiple wavelengths. Under the assumed condition that atmospheric aerosol particle-size spectra distribution meets the requirement of Junge size distribution, interpolation is carried out to obtain a whole layer of atmospheric aerosol optical thickness corresponding to a lidar measurement wavelength. Simultaneously, a Fernald method is utilized to solve echo data measured by a lidar along a same path so as to obtain height distribution of aerosol extinction coefficients. On a clear day, atmospheric aerosol can be assumed to be concentrated under the height lower than 6km, integration is performed on the 6km height by the height distribution of aerosol extinction coefficients, and the obtained numerical value can be regarded as the whole layer of atmospheric aerosol optical thickness. Through comparison, calibration coefficients can be obtained.

Description

technical field [0001] The invention belongs to the technical field of laser radar constant calibration and relates to a system constant calibration method of micro-pulse laser radar. Background technique [0002] Lidar has been used as an active remote sensing detection tool for decades. With the rapid development of laser technology, signal detection and data acquisition technology, Lidar can detect tropospheric aerosols in terms of height, vertical span, spatial resolution, and time. Continuous monitoring, measurement accuracy and other aspects have very good results. The lidar system constant is an important parameter of the lidar, which is related to many parameters of the lidar system. In order to ensure the accuracy of the measurement data, the lidar system constants need to be calibrated. If the constant parameters of the lidar system can be known, the lidar measurement can be used to give accurate height distribution data of the atmospheric aerosol extinction coef...

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Application Information

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IPC IPC(8): G01S7/497
Inventor 强希文吴敏李志朝刘晶儒常金勇宗飞徐云岫
Owner NO 63655 TROOPS OF THE CHINESE PEOPLES LIBERATION ARMY
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