Inversion method and system of downlink shortwave radiation and photosynthetically active radiation data

A technology of photosynthetically active radiation and short-wave radiation, which is applied in the field of satellite remote sensing and its application, can solve the problems of not considering the terrain, the inversion error of the surface albedo, and the inability to effectively identify ice, snow and clouds, etc., so as to improve the calculation accuracy, improve the accuracy and The effect of resolution

Inactive Publication Date: 2012-02-01
BEIJING NORMAL UNIVERSITY
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Problems solved by technology

2) The influence of terrain: At present, many radiation algorithms do not consider the influence of terrain
Inability to effectively identify ice, snow and clouds will lead to errors in surface albedo inversion, because the downlink radiation also includes multiple reflections on the surface, thus affecting the results of surface radiation inversion

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  • Inversion method and system of downlink shortwave radiation and photosynthetically active radiation data
  • Inversion method and system of downlink shortwave radiation and photosynthetically active radiation data
  • Inversion method and system of downlink shortwave radiation and photosynthetically active radiation data

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[0062] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0063] The present invention utilizes the remote sensing data of available geostationary satellites and polar-orbiting satellites, and utilizes MODIS (moderate resolution imaging spectrometer) related data to generate downlink effective photosynthetic radiation with a spatial resolution of 3 hours and 5 kilometers on the global land surface in 2008-2010 and downlink shortwave radiation data to provide accurate input for the estimation of surface radiative energy balance in various Earth system models.

[0064] like figure 1 Shown, method of the present invention comprises the following steps:

[0065] S1: Input geostationary satellite and polar orbit satellite data, the ...

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Abstract

The invention relates to the technical field of satellite remote sensing and application and discloses an inversion method and system of downlink shortwave radiation and photosynthetically active radiation data. The method comprises the following steps of: (S1) inputting stationary satellite and polar orbital satellite data; (S2)pre-processing global surface reflectance data in the stationary satellite and polar orbital satellite data so as to remove the influence of the cloud on the ground reflectance; (S3) establishing a lookup table, wherein the lookup table displays the relationship between the extraterrestrial radiation and the surface photosynthetically active radiation and downlink shortwave radiation; (S4) on the basis of extraterrestrial radiation brightness values received by different satellites in the stationary satellite and polar orbital satellite, figuring out corresponding photosynthetically active radiation and downlink shortwave radiation under different atmospheric conditions according to the lookup table; and (S5) forming a global epicontinental radiation product according to data fusion. According to the invention, the calculation accuracy of the downlink shortwave radiation and photosynthetically active radiation data inversion is improved.

Description

technical field [0001] The invention relates to the technical field of satellite remote sensing and its application, in particular to an inversion method and system for downlink short-wave radiation and photosynthetically active radiation data. Background technique [0002] Downgoing shortwave radiation is the 300-3000nm part of solar radiation, usually defined as: [0003] [0004] where I(λ) is the spectral irradiance and λ is the wavelength range. [0005] Photosynthetically active radiation is the 400-700nm part of solar radiation, namely [0006] [0007] Photosynthetically active radiation is the basic energy for the formation of biomass, controls the speed of effective photosynthesis of terrestrial organisms, and directly affects the growth, development, yield and yield quality of vegetation. At the same time, photosynthetically active radiation is an important climate resource, which affects the material and energy exchange between the surface and the atmosph...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/41G06F19/00
Inventor 赵祥张晓通周公器张鑫梁顺林
Owner BEIJING NORMAL UNIVERSITY
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