Precipitation detection method and system based on equal weight conjugate of satellite-borne microwave oxygen detection channel

Abstract

The present invention discloses a method and system for detecting precipitation with equal weights conjugated to satellite-borne microwave hydrogen oxygen detection channels. The method includes: inputting 118GHz actual observed brightness temperature, instrument scanning angle and surface elevation into a pre-trained clear sky brightness temperature forecasting model, Output the learning brightness temperature of the thirteen channels of 50‑60GHz respectively; if the difference between the learning brightness temperature of one channel and the actual observed brightness temperature of the channel is greater than the precipitation judgment threshold of the channel among the thirteen channels of 50‑60GHz, It is considered that there is precipitation cloud pollution on the observation pixel of the channel, otherwise, the channel is considered not affected by precipitation. The method of the present invention effectively improves the data utilization rate, gets rid of the dependence on the window area channel radiation in the application process of the temperature observation data, realizes the channel-by-channel precipitation detection of the satellite remote sensing temperature detection data in the sense of atmospheric radiation transmission, and improves the microwave thermometer data. Accuracy in Inversion of Atmospheric Temperature Profiles, Application of Assimilation in Numerical Weather Prediction Systems.

Description

technical field [0001] The invention relates to the field of passive microwave remote sensing, in particular to a method and system for detecting precipitation with equal weight conjugates of satellite-borne microwave double oxygen detection channels. Background technique [0002] Microwave thermometer is a passive microwave remote sensing instrument, which can obtain all-day and all-weather global atmospheric temperature information, and plays an important role in atmospheric detection and ocean observation. Its detection data can be widely used in meteorology, agriculture, forestry, geology, marine environment monitoring and military condition forecasting and so on. [0003] In the past ten years, one of the most important reasons for the rapid improvement of the global numerical prediction quality is the improvement of the initial field of numerical prediction by satellite data assimilation. Among them, the assimilation of spaceborne microwave data, especially microwave ...

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Problems solved by technology

[0010] The purpose of the present invention is to overcome the above-mentioned traditional precipitation detection method which only uses the observation radiation of the window area channel to carry out the precipitation identification problem, and proposes a precipitation detection method based on the radiation characteristics of the temperature detection channel itself.

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