A joint inversion method for aerosol and surface parameters

Abstract

The invention discloses an aerosol and surface parameter joint inversion method. The surface reflectance of four wave bands of 0.45-0.52 [mu]m, 0.52-0.59 [mu]m, 0.63-0.69 [mu]m and 0.77-0.89 [mu]m isconstructed through two extracted spectrum basic vectors, and the average absolute error is smaller than 0.01. According to the aerosol and surface parameter joint inversion method, through a satellite remote sensing multispectral earth surface reflectance reconstruction method, accurate reconstruction of multispectral earth surface reflectance of different ground objects can be effectively realized, and the geosol and surface parameter joint inversion method for GF-1 satellite remote sensing data is realized. According to the method, the prepared surface reflectance is not needed, satellite data of a time sequence is not needed to be utilized to restrain inversion, and the corresponding aerosol optical thickness, the surface reflectance and other results can be obtained only through single-scene GF-1 satellite data.

Description

technical field [0001] The invention relates to the field of air pollution control, in particular to an atmospheric aerosol observation technology. Background technique [0002] Aerosols in the atmosphere play a direct or indirect role on the global radiation balance, climate change, and human health. As an important optical parameter of aerosol, aerosol optical thickness indicates the extinction ability of aerosol particles, and is widely used in various related fields. At present, there are mainly two methods of routine monitoring of aerosols: ground-based and space-borne. Ground-based observation has the characteristics of high precision. Compared with ground-based observations, spaceborne aerosol monitoring has the characteristics of wide range, low cost, and terrain constraints, but it is more difficult to retrieve aerosols based on satellite sensors. In addition, traditional aerosol optics based on satellite sensor data retrieval Thickness products have the disadvant...

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Problems solved by technology

[0004] It can be seen from the above description that there are still various problems in retrieving aerosol optical depth based on high-spatial-resolution satellite remote sensing data. Suitable; the surface reflectance library method needs to prepare the surface reflectance library in advance, which is more suitable for deserts and other areas with little surface change, but it is often not suitable for vegetation and other areas with large surface reflectance changes

Although the image sequence method can update the surface albedo library, it is based on the self-reversed surface albedo, which will lead to an increase in error accumulation, and there are also problems such as inaccurate image registration.

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