中文摘要：

为了解羊八井观测站的亚毫米波观测条件，使用移动式亚毫米波撂远镜（PortableSubmillimcterTelescope，POST）测量了羊八井观测站460GHz波段灭顶方向大气不透明度．观测结果表明，羊八井观测站的460GHz波段天顶方向大气不透明度的四分位数为1．25、1．42、163，观测时间段内大气不透明度T0≤1．0的时间比例约占3．4％．将此次观测结果与国际现有优秀亚毫米波台址比较，分析了影响亚毫米波不透明度的可能原因．

英文摘要：

To assess the observational condition of Yangbajin, the Portable Submillimeter Telescope （POST） is used to measure the atmospheric opacity at 460 GHz from November 2008 to December 2008. The result shows that the quartile of atmospheric opacity during the observing time at 460 GHz at Yangbajin Observatory is 1.25, 1.42 and 1.63 and the time proportion of atmospheric opacity less than 1 is about 3.4%. At last, we compare the submillimeter site conditions of Yangbajin with those of other submillimeter observatories in the world, and try to explore the possible causes that may influence the submillimeter atmospheric opacity.