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Layer bottom iteration detection method for penetrable layer of satellite-borne laser radar

A lidar, iterative detection technology, applied in measurement devices, climate sustainability, electromagnetic wave re-radiation, etc., can solve the problems of low algorithm accuracy and large inversion error, achieve strong signal attenuation, weak signal-to-noise ratio, The effect of good data support

Active Publication Date: 2018-04-03
WUHAN UNIV
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Problems solved by technology

[0016] In summary, the current algorithms for detecting aerosol layers based on spaceborne lidar data have low accuracy, especially for the large inversion error at the bottom of the layer, which limits the application of spaceborne lidar to a certain extent.

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  • Layer bottom iteration detection method for penetrable layer of satellite-borne laser radar
  • Layer bottom iteration detection method for penetrable layer of satellite-borne laser radar
  • Layer bottom iteration detection method for penetrable layer of satellite-borne laser radar

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Embodiment Construction

[0070] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0071] One, such as figure 1 Shown, the present invention comprises the following steps:

[0072] Step 1. Calculate the attenuation-scattering ratio based on the observation data of the spaceborne lidar:

[0073] The attenuation scatter ratio used in the profile scan in this step is defined as the ratio of the total backscattering attenuation data to the clean air backscattering attenuation data, as shown in the following formula:

[0074]

[0075] In the formula, z is the altitude above sea level; β′ total is the total back-attenuation scattering data, which can be obtained by spaceborne lidar, β′ air In order to clean the atmospheric backscatter attenuation data, it can be calculated from the molecular number density profiles of atmospheric molecules and ozone in meteorological data. Total backscatter data and clean a...

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Abstract

The invention provides a layer bottom iteration detection method for a penetrable layer of a satellite-borne laser radar. According to the relation between the laser radar ratio and the penetration rate, whether or not the attenuation scattering ratio calculated according to layer bottom-layer top signals is the same as the attenuation scattering ratio acquired according to profile scanning is taken as a physical constraint, and layer bottom detection is optimized by an iterative algorithm. By the method, the laser radar ratio and the layer bottom height of the penetrable layer can be determined accurately through iteration.

Description

technical field [0001] The invention belongs to the algorithm research of the application of the laser radar system in the meteorological field, and in particular relates to a penetrable layer-bottom iterative detection method of the spaceborne laser radar. Background technique [0002] Aerosol is a colloidal dispersion system formed by small particles of solid and liquid dispersed and suspended in gas. It is an important part of atmospheric composition and one of the main uncertain factors affecting the atmospheric environment. In addition to absorbing and scattering sunlight, aerosols in the atmospheric boundary layer can alter air quality directly or by affecting the formation of ozone in the stratosphere. The uncertainties in the impact of aerosols on global radiation are mainly related to the changes in the spatial distribution of aerosols and the optical and microphysical properties of aerosols, which are related to the life cycle and type of aerosols. To reduce the i...

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Application Information

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IPC IPC(8): G01S17/95G01S7/48
CPCG01S7/48G01S17/95Y02A90/10
Inventor 毛飞跃王威臧琳潘增新龚威
Owner WUHAN UNIV