Terahertz atmosphere remote sensing

Terahertz waves play an increasingly important role in the field of atmosphere remote sensing due to its unique atmosphere sensitivity. Terahertz atmospheric remote sensing technology has been a research hotspot at the international level. In 2004, NASA launched AURA, which included 2.5THz radiometer with two polarization properties. In 2007, ESA developed the Marschals heterodyne spectrometer, which adopted limb scanning method to detect the hyperspectral spectra of gas components in sub-millimeter wave thermal radiation. Currently, China's in-orbit meteorological satellite Fengyun-III is equipped with a millimeter-band radiometer, and Fengyun-IV is the world's first GEMS carrying terahertz remote sensing instrument. Based on the analysis of the application and technology of terahertz remote sensing at home and abroad, this paper puts forward the idea of developing remote sensing technology with independent intellectual property rights according to the current situation of atmospheric remote sensing in China.