Ground-based microwave radiometer, scaling method thereof and atmosphere detecting method

Abstract

The invention provides a ground-based microwave radiometer, a scaling method thereof and an atmosphere detecting method. The ground-based microwave radiometer comprises a flat mirror, a motor, a scanning control circuit, a lens, a feed source, a demultiplexer, a receiver unit, a scaling member and a data acquisition management unit. The radiometer utilizes the flat mirror for scanning and utilizesthe lens for focusing a plane wave which is reflected by the flat mirror so that relative position between the flat mirror and the feed source is fixed. The ground-based microwave radiometer preventsan output fluctuation phenomenon caused by standing-wave ratio change of an antenna feed system after relative position change between a parabolic reflecting surface antenna and the feed source in rotation, and furthermore prevents the defects of high machining difficulty and high cost in the parabolic reflecting surface antenna. Furthermore, according to the radiometer, the scaling method in which absolute scaling and real-time scaling are combined is utilized; not only can scaling accuracy be improved, but also system applicability to an environment can be improved.

Description

technical field [0001] The invention relates to the technical field of microwave remote sensing, in particular to a ground-based microwave radiometer, a calibration method thereof, and an atmospheric detection method. Background technique [0002] Atmospheric temperature and humidity profiles are important meteorological parameters. Real-time detection of these meteorological parameters is of great significance to numerical weather prediction, artificial rainfall and flight safety. As a kind of atmospheric detection equipment, the ground-based microwave radiometer detects the characteristics of the target by passively receiving the microwave radiation energy of the observation scene, and can obtain the atmospheric vertical temperature and humidity profile around the clock. Compared with other atmospheric detection methods, it has low maintenance cost, Reliable operation, and the advantage of working independently. [0003] At present, ground-based microwave radiometers at h...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the technical problems of difficult processing and fluctuating output signals caused by the use of rotating parabolic antennas in existing ground-based microwave radiometers, as well as the technical problems of complex system structures caused by the use of quasi-optical technology to achieve frequency separation , providing a ground-based microwave radiometer with high performance, high integration, low power consumption, and miniaturization, as well as a calibration method and an atmospheric detection method based on the radiometer

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