Research on G-Band Ice Cloud Detection Radar Technology

Ice clouds are clouds composed of ice crystal particles formed in the upper atmosphere. According to the International Satellite Cloud-Climate Project, ice clouds cover approximately 30% of the world. High-precision measurement of ice clouds is of great importance to global climate and weather research. contribute. The height of the ice cloud determines its important role in the earth's energy cycle and hydrological cycle. On the one hand, ice clouds absorb thermal infrared radiation from the Earth's surface and the atmosphere below the clouds, leading to climate warming, known as the greenhouse effect; on the other hand, ice clouds reflect incident solar shortwave radiation into space, which has a cooling effect. This article studies an ice cloud detection radar based on the G-band, using its high resolution and high sensitivity in the high frequency band to carry out research on the detection of ice clouds. We describe the millimeter-wave radar system, including its operating principles, system design, data processing, and products. This study provides an effective means to understand and predict the formation and evolution of ice clouds through the study of G-band millimeter-wave ice cloud radar detection methods. The minimum detectable intensity reaches -40dBz. Obtaining high-resolution ice cloud parameters at global time and space scales will help improve the radiation transfer model including ice cloud particle scattering, improve the accuracy of numerical weather prediction models, and provide early warning for aerospace, agriculture, and extreme weather, and other application services.