Method, device and system for microwave hyper-spectral clear air scaling

A hyperspectral, clear sky technology, applied in the field of microwave remote sensing, can solve the problem of low calibration accuracy, and achieve the effects of high calibration accuracy, high spectral resolution, and fast calibration speed

Inactive Publication Date: 2012-12-19
BEIJING KUNQI ELECTRONICS SYST
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Problems solved by technology

[0003] During the research and practice of the prior art, the inventor of the present invention found that in the existing implementation, the calibration parameters of the microwave hyperspectral radiometer are obtained through the meteorological information of an area, and its calibration accuracy is low

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  • Method, device and system for microwave hyper-spectral clear air scaling
  • Method, device and system for microwave hyper-spectral clear air scaling
  • Method, device and system for microwave hyper-spectral clear air scaling

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Embodiment Construction

[0070] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0071] figure 1 A flow chart of a microwave hyperspectral clear sky calibration method provided by an embodiment of the present invention, the method includes:

[0072] Step 101: Set the atmospheric opacity of the clear sky background in the zenith direction; as the initial value of the iterative algorithm;

[0073] Step 102: Obtain the atmospheric average radiation temperature from the database; the atmospheric average radiation temperature is the atmospheric avera...

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Abstract

The invention discloses a method, a device and a system for microwave hyper-spectral clear air scaling. The method comprises the following steps of: setting an atmospheric opacity of a clear air background in a zenith direction; obtaining an atmospheric mean radiant temperature from a database, wherein the atmospheric mean radiant temperature is atmospheric mean radiant temperature of different regions, different months, different frequencies and different elevations; figuring out an atmospheric brightness temperature of the clear air background in the zenith direction according to the atmospheric opacity and the atmospheric mean radiant temperature; obtaining a radiation temperature of a black body scaling source; carrying out two-point scaling according to the atmospheric brightness temperature and the radiation temperature, and figuring out system gains of all channels of a microwave hyper-spectral radiometer; figuring up the atmospheric opacity in all scaling wave velocity irradiation directions according to the system gains; and carrying out iterative computation on the atmospheric opacity to obtain new scaling data capable of meeting a clear air scaling model. According to the invention, the scaling precision of the microwave hyper-spectral radiometer is improved.

Description

technical field [0001] The invention relates to the technical field of microwave remote sensing, in particular to a microwave hyperspectral clear sky calibration method, device and system. Background technique [0002] With the development of microwave remote sensing technology, in terms of meteorological monitoring, the calibration of traditional microwave radiometers usually uses liquid nitrogen as a cold calibration source, or the clear sky calibration method. Among them, the inconvenient transportation and use of liquid nitrogen lead to the application of liquid nitrogen calibration method. Although the clear-sky calibration method does not have this problem, it needs to use the clear-sky background as a cold calibration source to realize the two-point calibration of the microwave radiometer, and the microwave radiometer only collects a few specific sky elevation angles in a certain area That is to say, the clear sky calibration method needs to use the clear sky backgro...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01W1/18
Inventor 苗俊刚谢衍聂军平龙涛
Owner BEIJING KUNQI ELECTRONICS SYST
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