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Aerosol secondary inversion method based on PARASOL multi-angle polarization data

A multi-angle polarization and aerosol technology, applied in the field of remote sensing, can solve problems such as difficulty in accurately obtaining the proportion of aerosol components, large differences in aerosol types, and low accuracy of aerosol optical thickness inversion

Inactive Publication Date: 2019-05-21
南京泛在地理信息产业研究院有限公司 +1
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Problems solved by technology

However, the aerosol types in different inversion areas are quite different, so it is difficult to accurately obtain the proportion of aerosol components in a specific area, resulting in low inversion accuracy of aerosol optical thickness

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  • Aerosol secondary inversion method based on PARASOL multi-angle polarization data
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Embodiment Construction

[0024] The technical scheme of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0025] Based on the POLDER / PARASOL multi-angle polarization data and AERONET site observation data from January 2008 to October 2013, Jiangsu Province, Zhejiang Province, Anhui Province and Shanghai were selected as the research area, and the aerosol components were used according to the present invention Proportional construction of a custom aerosol model to realize aerosol inversion based on PARASOL AOD further details the present invention.

[0026] S1: Read PARASOL L1B multi-angle polarization data, and perform preprocessing such as cloud detection, gas absorption correction, and polarization reflectance calculation, extract and calculate the geometric angle information of each pixel in different observation directions, the polarization reflectance of 865nm band and other parameters . PARASOL L1B is the abbreviation of PARASOL fir...

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Abstract

The embodiment of the invention provides an aerosol secondary inversion method based on PARASOL multi-angle polarization data. The method comprises: constructing an continental aerosol type lookup table and an urban aerosol type lookup table respectively by utilizing a vector 6S radiation transmission model; meanwhile, obtaining different combinations of aerosol component proportions under the background of the continental aerosol and the urban aerosol by utilizing an orthogonal test method; constructing a component lookup table on the basis of the PARASOL multi-angle polarization data, then selecting the preprocessed PARASOL multi-angle polarization data as inversion data, determining an aerosol type closest to each pixel through an aerosol type lookup table, and obtaining a first inversion result; and selecting a corresponding component lookup table according to the aerosol type of each pixel determined in the first inversion to determine the AOD and the component proportion of eachpixel, and obtaining a second inversion result. According to the method, a default aerosol type in a radiation transmission model is replaced by secondary inversion, so that inversion errors caused byaerosol model selection are effectively reduced, and the inversion precision of the aerosol optical thickness is improved.

Description

technical field [0001] The invention belongs to the technical field of remote sensing, and in particular relates to an aerosol secondary inversion method based on PARASOL multi-angle polarization data. Background technique [0002] Atmospheric aerosol refers to a combined system composed of solid and liquid particles suspended in the air, which is widely distributed in the atmosphere. Due to its short life cycle and complex physical and chemical changes, it has great influence on the regional and global atmospheric environment and climate. has a huge impact. On the one hand, it affects the transmission of long-wave radiation by scattering and absorbing solar radiation, disturbs the earth's radiation balance, and affects the climate; on the other hand, atmospheric aerosol particles are also the main pollutants in the air, affecting people's production, life and health. [0003] Aerosol Optical Depth (AOD) is an important parameter to characterize the extinction characteristi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/06
Inventor 查勇程峰李越
Owner 南京泛在地理信息产业研究院有限公司
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