本项目将在西藏阿里地区狮泉河台址开展远红外亚毫米波窗口台址优良度测量工作。研究内容包括 1）研制傅立叶频谱仪全自动观测装置，用于测量0.75～15THz窗口的大气透过率特性；2）更新移动式亚毫米波望远镜POST和接收机系统，用于测量500 GHz窗口的大气透过率特性；3）利用这两台设备在高海拔的狮泉河站址开展为期2年的观测，给出该站址在远红外亚毫米波窗口的大气通过率特性及全年分布情况。通过本项目获得的系统性测量结果将可以定量确定狮泉河台址的远红外毫米波观测条件，提供科学判据确定该台址是否是中纬度最好的远红外亚毫米波天文台址之一，为将来我国建设大型亚毫米波天文望远镜及阵列奠定重要基础。

This program aims to carry out site testing for far-infrared and submillimeter astronomy at Shiquanhe, Tibet. We plan to 1) develope an automatic facility equiped with a Fourier Transfer Spectrometer to measure the atmospheric transmission over the frequency range 0.75 ~ 15 THz; 2) upgrade the submillimeter telescope POST to measure the atmospheric transmission at 500 GHz; 3) use the two facilities to perform site testing at Shiquanhe for two years and provide the measurements and statistics of atmospheric transmission in the far-infrared and submillimeter. The site testing results will quantify the site conditions and tell whether Shiquanhe is one of the best sites for far-infrared and submillimeter astronomy at the middle latitudes. If confirmed, it could be the future site to place large submillimeter telescopes and interferometers.