摘要
报导了2000年和2001年丽江高美古所观测到的大气视宁度,文中统计了14个晚上的观测数据,得到的平均视宁度为0.97″,变化在0.73″～1.42″之间。这些视宁度值是用国际上天文台站测大气视宁度通用的DIMM方法,采用8ms单幅采样曝光取得的。本文还统计了丽江高美古1995年以来每年12月份的大气视宁度,可以看到高美古不同年份大气视宁度的部分变化情况。
The seeing were measured at the Gaomeigu in 2000-2001 with the DIMM-TSA (The differential image motion monitor with three sub-apertures).Each time the DIMM-TSA took 8ms exposure time for one image sample and 128 samples ware statistically to be one seeing record.During 14 nights the seeing ranged form 0.73″ to 1.42″ and the average seeing was 0.97″. For the study of the turbulence characters at the Gaomeigu,4ms,8ms and 20ms exposure time were also used.The DIMM-TSA has three sub-apertures that could measure seeing in three directions simultaneously,and the effect of the wind speed and wind direction on seeing measurements is estimated.
出处
《云南天文台台刊》
CSCD
北大核心
2002年第4期45-50,共6页
Publications of the Yunnan Observatoty
