Satellite-borne terahertz multi-angle ice cloud imager

Abstract

The invention relates to a satellite-borne terahertz multi-angle ice cloud imager. The satellite-borne terahertz multi-angle ice cloud imager comprises a rotating unit; the rotating unit comprises a plane reflector antenna, a parabolic reflector antenna, feed source loudspeakers of a plurality of frequency bands and receivers of a plurality of frequency bands; the plane reflector antenna is used for receiving ice cloud radiation signals and reflecting the ice cloud radiation signals to the parabolic reflector antenna; the parabolic reflector antenna is used for reflecting the ice cloud radiation signals to the feed source loudspeakers of a plurality of frequency bands and the receivers of a plurality of frequency bands; and the feed source loudspeakers of a plurality of frequency bands andthe receivers of a plurality of frequency bands are used for receiving the ice cloud radiation signals. According to the satellite-borne terahertz multi-angle ice cloud imager, a first driving mechanism is used for driving the angle of the plane reflector antenna, so that the plane reflector antenna can perform ice cloud detection at different angles. With the satellite-borne terahertz multi-angle ice cloud imager of the invention adopted, ice clouds which have ice particles with effective radiuses of 50-800 microns can be detected, and multi-angle detection can facilitate the inversion of the shape factors of the ice particles.

Description

technical field [0001] The invention relates to an ice cloud imager, in particular to a spaceborne terahertz multi-angle ice cloud imager. Background technique [0002] Ice cloud is a cloud composed of ice crystals in whole or in part in the upper troposphere. The global coverage rate is as high as 30%, and it has an important impact on the global water cycle and energy cycle. The main applications of ice cloud detection are reflected in several aspects such as climate change research, weather forecasting, numerical weather prediction models and cloud precipitation physics. [0003] The ice cloud detection load is mainly divided into three types of load: optical remote sensing, microwave remote sensing and radar detection. On the one hand, according to the research on the scattering characteristics of electromagnetic waves and ice particles, the closer the effective size of ice particles is to the wavelength, the stronger the scattering effect. Therefore, the optical remote...

AI Technical Summary

Problems solved by technology

On the one hand, according to the research on the scattering characteristics of electromagnetic waves and ice particles, the closer the effective size of ice particles to the wavelength, the stronger the scattering effect. Therefore, the optical remote sensing payload can detect ice particles below 50um, and the radar detection payload can detect ice particles above 800um. The detection load of 50-800um ice particles is lacking, and the terahertz wavelength is equivalent to the size of ice particles in this range, which can make up for the detection gap of 50-800um ice particles

On the other hand, the scattering effect of ice particles is not only related to the size, but also directly related to the shape factor. The shape factor of ice particles can be obtained by detecting ice clouds at different angles. The current detection loads of ice clouds are all Detection from a single angle

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