Atmospheric correction method and system for hyperspectral remote sensing image

A hyperspectral remote sensing and atmospheric correction technology, applied in the field of atmospheric correction of hyperspectral remote sensing images, can solve problems such as not considering the difference of aerosol mode

Inactive Publication Date: 2015-04-01
WUHAN UNIV +1
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Problems solved by technology

However, at this stage, the atmospheric correction algorithm based on the atmospheric radiative transfer model inverts the aerosol and water vapor contents separately
Generally, the water vapor content is estimated by using the water vapor absorption band first, and then the aerosol inversion is considered aft

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  • Atmospheric correction method and system for hyperspectral remote sensing image
  • Atmospheric correction method and system for hyperspectral remote sensing image
  • Atmospheric correction method and system for hyperspectral remote sensing image

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Embodiment Construction

[0063] According to the 6S radiation transfer theory, the radiation signal received by the satellite includes the part directly scattered by the atmosphere, the reflected part of the surface target and the reflected part of the background around the surface target. Assuming that the earth's surface is a Lambertian surface, the signal at the entrance pupil of the satellite is the apparent reflectance ρ TOA Can be described as:

[0064] ρ TOA = T g ( O 3 , O 2 , CO 2 , NO 2 , CH 4 ) * [ ρ R + A + ...

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Abstract

The invention discloses an atmospheric correction method and system for a hyperspectral remote sensing image. The method comprises steps as follows: step one, surface reflectance and observation apparent reflectance of a blue waveband and a red waveband of a dark object are acquired according to satellite signals; step two, an aerosol mode is inversed based on the satellite signals; step three, moisture content is inversed based on the satellite signals and the current atmospheric aerosol mode; and step four, the remote sensing image is subjected to atmospheric correction according to the current atmospheric aerosol mode and the current moisture content obtained through inversion. Matched aerosol modes are established according to characteristics of different areas, and the aerosol mode is inversed firstly before atmospheric correction, so that the accuracy of atmospheric correction is improved; mutual influence of moisture content and aerosol is comprehensively considered, the aerosol optical thickness and the moisture content are subjected to synergic inversion, and mutual influence of the aerosol optical thickness and the moisture content can be further eliminated.

Description

technical field [0001] The invention belongs to the technical field of atmospheric environment remote sensing, and in particular relates to a hyperspectral remote sensing image atmospheric correction method and system, which are suitable for the Hyperion sensor of the EO-1 satellite. Background technique [0002] Aerosol and water vapor in the atmosphere are one of the important factors affecting the quality of aerial and aerospace remote sensing image data [1-4] , the purpose of atmospheric correction is to eliminate the influence of various components in the atmosphere on remote sensing signals and restore the real surface radiation information. Atmospheric conditions are changing rapidly, and it is difficult to measure atmospheric parameters synchronously when satellites pass by. If atmospheric information can be directly retrieved from remote sensing information, atmospheric correction can be performed better. Atmospheric O 3 , O 2 , CO 2 , NO 2 、CH 4 The content o...

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Application Information

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IPC IPC(8): G01S7/497G01S17/95
CPCG01S7/48Y02A90/10
Inventor 方圣辉佃袁勇姚崇怀周志翔王娣
Owner WUHAN UNIV
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