Research progress of THz technology application in the atmospheric sounding field

The range of THz frequency (0.1-10 THz) and its characteristics enable THz wave to have a higher spatial resolution and atmospheric parameter sensitivity. Moreover, the important role of THz radiation playing in the earth's radiation balance determines that THz radiation has great research value and broad application prospects in the atmospheric sounding field. The research progress of THz technology application in the atmospheric sounding field was presented, as well as the analysis of the principles, characteristics and existing problems of THz wave remote sensing for the atmospheric humidity profiles, atmospheric temperature profiles, cirrus clouds microphysical parameters and atmospheric trace gas composition. In the last section, several suggestions were put forward for THz wave atmospheric sounding technology research and the frontier and hotspot issues of the research were pointed out.