Ground-based meteorological microwave radiometer system based on dual-frequency antenna and measurement method

Abstract

The invention discloses a ground-based meteorological microwave radiometer system based on a dual-frequency antenna and a measurement method. In the ground-based meteorological microwave radiometer system, an atmospheric pressure sensor, an infrared radiometer, a GPS, a temperature and humidity sensor, and a rainfall sensor are connected to a data acquisition and control device which is connected to a computer. The device of each system is powered by a power supply module. A room temperature blackbody calibration source is installed in a microwave radiometer which is formed by a K band antenna, a K band receiver, a V band antenna, and a V band receiver. The K band antenna is connected to the K band receiver. The V band antenna is connected to the V band receiver. Both the K band receiver and the V band receiver are connected to the data acquisition and control device, and the K band antenna and the V band antenna are installed back to back. A motor controls the rotation of the whole microwave radiometer. According to the radiometer of the invention, a dual-frequency independent rotating antenna is used to substitute a dual-frequency antenna with a polarization grid shared reflection surface or paraboloid.

Description

technical field [0001] The invention belongs to the field of atmospheric microwave passive remote sensing, and in particular relates to a dual-frequency antenna-based ground-based meteorological microwave radiometer system and a measurement method. Background technique [0002] As a passive remote sensing detection device, the microwave radiometer has a simple structure and can continuously receive the microwave radiation signal emitted by the atmosphere itself, and directly invert the temperature, humidity, liquid water content and other meteorological elements from the atmospheric bright temperature signal. Atmospheric vertical distribution information, so as to accurately predict small and medium-scale weather disasters, has very important practical value for real-time weather forecasting. In recent years, the domestic application of meteorological microwave radiometers in disaster weather forecasting has attracted widespread attention. Theoretical and practical research...

AI Technical Summary

Problems solved by technology

[0003] At present, the microwave radiometers produced by the American Radiometrics Company and the German RPG Company both use the method of sharing the reflector or parabola through the polarization grid. The disadvantage of this antenna form is that the antenna processing cost is relatively high, and the polarization grid introduces The loss reduces the performance of the antenna

Some domestic units have proposed a ground-based microwave radiometer with dual-frequency independent reflectors. However, the antennas of the two frequency bands (K-band and V-band) are placed side by side independently, which occupies a large volume; The measured sky atmosphere has a certain misalignment in the spatial position, which introduces additional errors

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