Aerosol optical thickness inversion method of domestic multi-angle polarization satellite sensor

Abstract

The invention discloses an aerosol optical thickness inversion method of a domestic multi-angle polarization satellite sensor. The method comprises the following steps: carrying out satellite multi-angle and multi-band data matching preprocessing; identifying cloud pixels of the multi-angle polarization satellite image data; based on surface reflection contribution estimation of an empirical orthogonal function, constructing a scattering matrix under multi-angle observation to perform surface radiation item estimation; constructing an aerosol model and establishing an inversion lookup table; performing aerosol optical thickness inversion based on optimal model identification. The invention provides a global land overhead aerosol optical thickness inversion method suitable for a high-resolution No.5 satellite multi-angle polarization imager (DPC) for the first time, and particularly relates to a global land overhead aerosol optical thickness inversion method suitable for a high-resolution No.5 satellite multi-angle polarization imager. The algorithm is stable, efficient and verifiable, and the method can be applied to other satellite platforms with multi-angle detection capability in a business manner.

Description

technical field [0001] The invention relates to an aerosol optical thickness inversion method in the fields of atmospheric science and remote sensing science, in particular to an aerosol optical thickness inversion method applicable to domestic multi-angle polarized satellites over land. Background technique [0002] Atmospheric aerosols are solid or liquid particulate matter in the earth's atmosphere, with particle sizes spanning five orders of magnitude from 0.001 to 100 microns, forming a complex giant system in the earth's atmosphere. Aerosols mainly come from natural and human activities. Natural source aerosols include particulate matter discharged into the atmosphere from natural sources such as land dust, sand dust transmission in desert areas, fire outbreaks, and forest fires. Anthropogenic aerosols include industrial, agricultural, The part emitted into the atmosphere by activities such as traffic exhaust, building construction, and urban heating includes not only ...

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Problems solved by technology

[0003] Traditionally, ground monitoring stations are generally used to sample and monitor the near-surface atmosphere, and analyze the characteristics of aerosols through physical, chemical, and optical means. However, this method has certain defects: first, the spatial coverage is poor, and the monitoring The stations are mainly distributed in urban areas, but in the vast countryside, forests, deserts, oceans and other areas, there are few or no stations, and it is impossible to form a global or regional space-continuous aerosol monitoring capability; secondly, traditional methods generally only It can obtain aerosol samples of the near-surface atmosphere, but does not have the detection capability of the middle and upper atmosphere, let alone obtain the aerosol information of the entire atmosphere

At present, there is no aerosol optical depth retrieval method for DPC / GF-5 that can be operated commercially

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