Method for inverting atmospheric water vapor content from MODIS (Moderate Resolution Imaging Spectroradiometer) data

A technology of atmospheric water vapor content and data inversion, which is applied in the direction of measuring devices, material analysis through optical means, instruments, etc., can solve the problems of complex inversion methods and difficulty in satisfying the personal development and use of scientific researchers, and achieve reduction of calculation time, Strong practicability and the effect of reducing unknowns

Inactive Publication Date: 2011-01-05
INST OF AGRI RESOURCES & REGIONAL PLANNING CHINESE ACADEMY OF AGRI SCI +1
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Problems solved by technology

[0007] The purpose of the present invention is to provide a method for retrieving atmospheric water vapor content from remote sensing data MODIS, to overcome the complexity of the existing atmospheric water vapor content inversion method, and it is difficult to meet the needs of individual development and use of scientific researchers, and to enrich domestic researchers for thermal The product algorithm developed by the infrared remote sensor provides a reference for the retrieval method of atmospheric water vapor content for thermal infrared sensors on 100 satellites planned to be launched in my country before 2020, and can further improve the retrieval accuracy of atmospheric water vapor content in the current operations of the Ministry of Agriculture and the Meteorological Bureau , to improve the accuracy of weather forecasting and drought monitoring

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  • Method for inverting atmospheric water vapor content from MODIS (Moderate Resolution Imaging Spectroradiometer) data
  • Method for inverting atmospheric water vapor content from MODIS (Moderate Resolution Imaging Spectroradiometer) data
  • Method for inverting atmospheric water vapor content from MODIS (Moderate Resolution Imaging Spectroradiometer) data

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Embodiment Construction

[0042] The inversion algorithm derivation of atmospheric water vapor content is based on the intensity of solar radiation reflected from the surface received by the sensor. The radiation intensity of the sun is weakened by the atmosphere when it reaches the sensor through the atmosphere. Atmospheric transmittance is a physical quantity used to describe the degree to which solar radiation intensity is weakened. Atmospheric transmittance varies with wavelength and observation angle, usually after simplification, the radiative transfer equation can be described as Equation 1 [Gao B. and Kaufman Y.J., The MODIS Near-IR water vapor algorithm: product ID: MOD05- total pregnant water, algorithm technical background document, Remote Sensing Division, Code 7212, Naval Research Laboratory, 4555 Overlook Avenue, SW, Washington, DC 20375 (1998).]:

[0043] L sensor (λ)=L sun (λ)τ(λ)ρ(λ)+L path (λ) (Equation 1)

[0044] where λ represents the wavelength, L sensor (λ) represents the r...

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Abstract

The invention relates to a method for inverting atmospheric water vapor content from MODIS (Moderate Resolution Imaging Spectroradiometer) data, which can be applied to the remote sensing application departments, such as meteorology, environment monitoring, land management, crop condition monitoring, disaster monitoring and the like. The method comprises the following three steps of: (1) performing forward simulation to the second, fifth, seventeenth, eighteenth and nineteenth near-infrared bands of acquired remote sensing MODIS data in given areas and seasons and an atmospheric model by using atmospheric radiation transmission simulation software MODTRAN, and establishing a training and test database; (2) repeatedly training and testing the training and test data set by using a neural network; and (3) performing inversion calculation to the MODIS actual image data, and performing actual earth surface verification and application analysis. The atmospheric water vapor inversed product has high precision, strong practicability and relatively simple operation. The method can be applied to the departments of weather forecast, environment monitoring, crop condition monitoring, disaster monitoring and the like.

Description

technical field [0001] The invention relates to a method for retrieving atmospheric water vapor content by using ground reflection information obtained by a MODIS sensor on an earth observation satellite. This method overcomes the shortcomings of unstable accuracy estimation in previous inversion methods when atmospheric water vapor is low or high. It can be applied in remote sensing departments such as meteorology, agriculture, environmental monitoring and drought monitoring. Background technique [0002] Atmospheric water vapor content is a very important greenhouse gas in the atmosphere, and it is also a very important factor to be considered in the study of energy balance and global climate change [Manabe S. and Wetherald R.T., Thermal equilibrium of atmosphere with a given distribution of relative humidity , Journal of the Atmospheric Sciences, 1967, 24, 241-259; Kaufman Y.J. and Gao B.C., Remote sensing of water vapor in the near-IR from EOS / MODIS, IEEE Trans. Geosci....

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/17G06N3/02
Inventor 毛克彪宋亮邱建军李丹丹刘佳郭永礼高懋芳武胜利
Owner INST OF AGRI RESOURCES & REGIONAL PLANNING CHINESE ACADEMY OF AGRI SCI
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