摘要
介绍了云南太阳光学选址的历程。主要叙述了自1996年开始的红外太阳选址的过程:初选踏勘,比对筛选、定点观测。最佳选点为澄江县抚仙湖畔的半岛老鹰地。
This paper describes the history of site tests for solar optical observations in Yunnan.The site test for the infrared solar tower (IST) in Yunnan began from 1996,and consisted of 3 phases:the preliminary site survey,comparison observation and the observation at the fixed stations (with S-DIMM).The best site is finalized at Lao Ying Di,a small peninsula on the bank of Fuxian Lake,Cheng Jiang county.The site for the IST station at Lao Ying Di is chosen following the comparison observation with SDIMM for over one year at two final near-water sites.The two sites are picked out from 7 sites near water and 8 sites in mountain areas with visual observation by using an 89mm Questar telescope after on-site survey over 40 candidate locations in Yunnan.The IST station is about 68 km form Kunming,the capital of Yunnan province.The average sunshine time is 2200 hours annually at the site.The yearly mean R0 observed with SDIMM characterizing the solar seeing is 12.3cm,with a moderate value of 11.5cm,corresponding to a resolution of 1″;the maximum R0 reaches to 42 cm,corresponding to a resolution of 0.3″.The R0 below 5 cm accounts for less than 10 per cent of the total samples.The rate of recurrence of the measured wind speed,less than 5m/s is 90%,and that of the wind speed at 6-10m/s is about 6%.The strong wind,at a speed higher than 15m/s,occurs only 3 times in a year.The yearly mean relative humidity is 75%,and the average water vapour in the atmosphere is 11 cm annually.
出处
《云南天文台台刊》
CSCD
北大核心
2002年第4期60-67,共8页
Publications of the Yunnan Observatoty