基于修正的Van-Vleck Weisskopf线型、辐射传输色散理论和水汽连续体吸收模型，结合HITRAN数据库，建立了太赫兹波大气传输衰减模型——VVWH，形成了对宽频太赫兹波在真实大气中水平传输衰减的数值模拟能力。同时对太赫兹时域光谱技术（THz-TDS）获取的透射光谱实测数据进行了对比分析。计算结果与实验结果总体变化趋势一致，在吸收谱线处两者吻合良好，但在低频的大气窗口区，实验结果相比计算呈现出更强的传输衰减。考察了相对湿度对太赫兹波大气传输衰减特性的影响变化。

A model of the terahertz wave’s atmospheric transmission and attenuation is developed with the radiation transmission theory, continuum absorption and modified Van Vleck-Weisskopf line-shape based on the HITRAN database. The THz wave atmospheric attenuation experimental results obtained with the THz-time domain spectroscopy (THz-TDS) technique are analyzed by using this model, and the absorbing attenuation characteristics are compared. The influence of the humidity on the atmospheric attenuation is studied. The precision of the resulted theoretical attenuation is demonstrated by the good agreement between the calculation and the measurement, but a small discrepancy remains in the low-frequency atmospheric window.