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A satellite AOD product correction method integrating multi-source feature geographic parameters

A geographical parameter and satellite technology, applied in the field of satellite remote sensing inversion products, can solve the problems of low precision and large error of AOD products, and achieve the effect of accurate and reliable repair results, fast correction, and efficient algorithms

Active Publication Date: 2021-08-17
CENT SOUTH UNIV
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  • Application Information

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Problems solved by technology

[0005] In order to effectively solve the problem of low accuracy and large error of AOD products retrieved by satellite remote sensing, the present invention provides a method for correcting satellite AOD products that integrates multi-source feature geographic parameters

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  • A satellite AOD product correction method integrating multi-source feature geographic parameters
  • A satellite AOD product correction method integrating multi-source feature geographic parameters
  • A satellite AOD product correction method integrating multi-source feature geographic parameters

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Embodiment Construction

[0046] The following is a detailed description of a preferred embodiment of the present invention with reference to the accompanying drawings.

[0047] 1. Construction and simulation of AOD random forest regression model integrating multi-source feature geographic parameters

[0048] The AOD random forest regression model construction and simulation of the fusion multi-source feature geographic parameters adopted by the present invention comprise the following steps:

[0049] Step 1): Collect and extract multi-source characteristic geographic elements. This example takes the Beijing-Tianjin-Hebei region as an example to collect geographical parameter sets related to regional atmospheric aerosol emissions and dispersion, mainly including meteorological daily value data (temperature, air pressure, humidity, precipitation, wind speed), land cover / use type (construction land use, grassland, woodland, water), road traffic, population grid and terrain elevation data. For surface g...

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Abstract

The invention discloses a satellite AOD product correction method that integrates multi-source characteristic geographic parameters. First, a satellite AOD product correction regression model is constructed based on a random forest algorithm, and the AERONET AOD planar simulation spatial distribution result is obtained as the satellite AOD after preliminary correction. data; then compared with the ground AERONET AOD real data site by site, to obtain the deviation of the two, and estimate the space interpolation, based on the estimated deviation value to correct the preliminary corrected satellite AOD value; finally, set the correction threshold, the corrected The satellite AOD data and the ground AERONET AOD data are compared site by site. This is a highly comprehensive, highly referential, effective and accurate satellite AOD product correction method invented when there is a certain difference between the AOD data retrieved by satellite remote sensing and the real AOD value. AOD Research Atmospheric PM 2.5 The spatio-temporal distribution characteristics and variation rules of effective concentrations and the assessment of air pollution conditions in continuous large-scale geographical regions provide a reference.

Description

technical field [0001] The invention relates to the field of satellite remote sensing inversion products, in particular to an aerosol optical depth (AOD) correction method. Background technique [0002] Atmospheric aerosol refers to a multiphase system composed of various solid and liquid particles with a diameter of 0.001-100 μm suspended in the atmosphere. The main sources of atmospheric aerosols include natural sources such as dust, salt particles, fallout from volcanic eruptions, and smoke from forest burning, as well as man-made sources such as combustion of fossil and non-fossil fuels, transportation, and smoke from various industrial emissions. In recent decades, the rapid development of urbanization and industrialization on a global scale has led to an increase in man-made emissions. Severe air pollution has had a serious impact on air quality and regional climate change, and has become a global environmental problem. Aerosol Optical Depth (AOD) is the most research...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/18G06N20/00
CPCG06F17/18
Inventor 邹滨游介文江佳
Owner CENT SOUTH UNIV