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A method of correcting the thermal radiation directionality of geostationary satellite's upgoing long-wave radiation products

A technology of long-wave radiation and geostationary satellites, applied in the field of space information, can solve problems such as lack of space, achieve dynamic correction, both accuracy and simplicity, and improve the effect of estimation accuracy

Active Publication Date: 2021-09-24
AEROSPACE INFORMATION RES INST CAS
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Problems solved by technology

Due to the lack of semi-empirical and semi-physical models of dynamic thermal radiation directionality, there is no practical method at home and abroad that can effectively use the dynamic multi-angle information of geostationary satellites to correct their thermal radiation directionality

Method used

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  • A method of correcting the thermal radiation directionality of geostationary satellite's upgoing long-wave radiation products
  • A method of correcting the thermal radiation directionality of geostationary satellite's upgoing long-wave radiation products
  • A method of correcting the thermal radiation directionality of geostationary satellite's upgoing long-wave radiation products

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Embodiment 1

[0089] GOES-16 is the first star of the new generation of GOES-R series geostationary satellites in the United States. It was launched in 2016 and released data in 2017. The main load ABI carried by it can realize the observation of the earth once every 15 minutes. The central wavelengths of the 11th, 14th and 15th bands are 8.5, 11.2 and 12.3 μm. Using the radiance of the top of the atmosphere of these three characteristic channels can directly estimate the surface The initial value of SULRe for uplink longwave radiation. The method proposed by the present invention can be further estimated to obtain the result SULRm after the thermal radiation directionality correction, and the accuracy of SULRm can be directly verified by using the measured data SULRt of the American Flux AmeriFlux site to test the efficacy of the present invention. For specific implementation methods, see figure 1 .

[0090] figure 2 The results of directly estimating SULRe using the ABI top-of-atmosphe...

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Abstract

The invention discloses a method for correcting the directivity of thermal radiation of long-wave radiation products on the surface of a stationary satellite. The stationary satellite can take high-frequency photographs of the surface from a fixed angle. The new generation of stationary satellites can observe the earth every 15 minutes. Based on The accuracy of surface uplink longwave radiation estimated by single-angle satellite signals is restricted by the directionality of surface thermal radiation. The existing satellite-scale thermal radiation directionality correction methods all require multi-angle instantaneous simultaneous observations, while the multiple observations of a geostationary satellite in a day are not synchronized, which is disturbed by the phenomenon of surface temperature increase and decrease, resulting in the existing correction methods being ineffective. Unable to apply. The input data of the invention is only the radiance value of the top of the atmosphere of the stationary satellite at multiple times, and the separation of the thermal radiation directional error and the true value of the hemispherical integral in the uplink long-wave radiation on the surface can be realized, which has both accuracy and simplicity.

Description

technical field [0001] The invention relates to a practical method for correcting the thermal radiation directionality of the upgoing long-wave radiation product on the ground surface of a geostationary satellite, which can be used for angle correction of the long-wave radiation product on the ground surface of a geostationary satellite, and belongs to the technical field of space information. Background technique [0002] Surface uplink long-wave radiation remote sensing products are widely used in hydrology, ecology, meteorology, environment and other fields. They are a direct indicator of the earth's temperature and one of the four components of the surface radiation budget. The geostationary satellites represented by GOES-16, MSG, Himawari-8, and FengYun-4 are all equipped with thermal infrared channels to observe the uplink longwave radiation on the earth's surface. Since geostationary satellites can only observe the earth from a fixed angle, the current algorithms for ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J5/00
CPCG01J5/007G01J5/80
Inventor 曹彪秦伯雄杜永明卞尊健历华肖青柳钦火
Owner AEROSPACE INFORMATION RES INST CAS
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