Method and device for inverting seaborne atmospheric precipitation by microwave imager

A technology of microwave imaging and sea atmosphere, applied in the field of satellite remote sensing, can solve problems such as the inability to guarantee the accuracy of atmospheric precipitable water

Pending Publication Date: 2021-03-09
NAT SATELLITE METEOROLOGICAL CENT
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Problems solved by technology

These two inversion methods need to predetermine the equation form of the regression equation (such as linear, logarithmic, square, etc.) Require

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  • Method and device for inverting seaborne atmospheric precipitation by microwave imager
  • Method and device for inverting seaborne atmospheric precipitation by microwave imager
  • Method and device for inverting seaborne atmospheric precipitation by microwave imager

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Embodiment Construction

[0036] The technical content of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0037] The microwave imager carried on the meteorological satellite can realize the monitoring of atmospheric precipitable water. In order to obtain high-precision atmospheric precipitable water (also called total water vapor), such as figure 1 As shown, the embodiment of the present invention provides a method for retrieving precipitable water in the sea atmosphere by a microwave imager, including the following steps:

[0038] Step S1. Obtain the brightness temperature data observed by the satellite to be retrieved, and perform preprocessing on it.

[0039] Obtain the satellite observation brightness temperature data of each channel to be retrieved by the microwave imager carried on the meteorological satellite; where each frequency band of the microwave imager corresponds to two channels of horizontal and ve...

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Abstract

The invention discloses a method and a device for inverting seaborne atmospheric precipitation by a microwave imager. The method comprises the following steps of obtaining satellite observation brightness temperature data to be inversed, and carrying out preprocessing, establishing an optimal nonlinear regression equation by using an evolutionary algorithm, and inputting the preprocessed satelliteobservation brightness temperature data to be inversed into the optimal nonlinear regression equation for inversion to obtain the total water vapor amount of the preset area. According to the method,based on satellite observation brightness temperature data and total water vapor amount of radiosonde, an optimal nonlinear regression equation is automatically determined by utilizing an evolution algorithm, and the problem that an equation form of the regression equation needs to be empirically given after a large amount of exploration in a current statistical algorithm is solved.

Description

technical field [0001] The invention relates to a method for retrieving precipitable water in the sea atmosphere by a microwave imager, and also relates to a corresponding device for retrieving the precipitable water in the sea atmosphere, belonging to the technical field of satellite remote sensing. Background technique [0002] Water vapor plays an important role in the energy and water cycle of the earth-atmosphere system. Water vapor transports and transfers energy through its changes in different phases in the atmosphere. The distribution and changes of the water vapor field in the atmosphere are closely related to the changes of various weather systems. Water vapor is the main substance of long-wave radiation and long-wave absorption in the atmosphere. It is also one of the main greenhouse gases in the atmosphere. The feedback effect of water vapor on climate disturbance is very obvious. Climate change plays a crucial role. Therefore, observing and studying the globa...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/95G06F17/11
CPCG01S13/958G06F17/11Y02A90/10
Inventor 吴琼
Owner NAT SATELLITE METEOROLOGICAL CENT
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