Calibration system and method for microwave weather observation instrument

Abstract

The invention relates to a calibration system and method for a microwave weather observation instrument. The calibration system for the microwave weather observation instrument is mainly composed of a microwave absorber, a heat insulation box and an air layer. On the basis of accurate theoretical analysis, the antenna temperature TB of an antenna opening face of an output series radiometer of the calibration system is obtained, then the voltage V output by a microwave radiometer is measured, a calibration equation is fitted through two or more sets of antenna temperature TB data and voltage V data, and calibration is carried out on the microwave weather observation instrument. According to the calibration system, selection and characteristic tests of key materials are achieved, and the problem that the calibration accuracy is affected due to the fact that a brightness temperature output face is frosted at low temperature is solved. On the basis of the calibration system, the calibration method is introduced, the microwave weather observation instrument not only can accurately conduct two-point linear calibration, but also can conduct multi-point calibration so as to check whether the linearity of the observation instrument is good or not.

Description

technical field [0001] The invention relates to a calibration system and a calibration method for a microwave meteorological observation instrument. Background technique [0002] Meteorological observation is of great significance to the national economy and national defense construction. For many years, in order to obtain local real-time meteorological data, it has been realized by launching wireless radiosondes. However, this method not only has high cost and complicated operation, but also cannot obtain long-term continuous meteorological data. Therefore, in recent years, microwave meteorological observers have developed rapidly and achieved gratifying achievements. Not only is it easy to operate, it can automatically work according to the program all-weather and all-day, and it can obtain long-term continuous meteorological data, which greatly improves the accuracy of weather forecast. However, importing a microwave meteorological observation instrument is expensive, a...

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Problems solved by technology

Solved the selection of key materials and characteristic tests, and solved the difficulty of affecting the calibration accuracy due to frost on the bright temperature output surface at low temperatures

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