几种气象因素对云台太阳光谱仪成像质量的影响规律

Regularity of the Influence of Some Climate Conditions on the Image Quality of Spectroheliograph at Yunnan Observatory

在多年的太阳光谱观测中 ,通过观察各种天气条件的变化对光谱仪成像质量的影响 ,初步总结出使像质优良的几条规律 :1 )在连续刮风过程中当风突然停止或减弱的短暂时间内像质明显变好 ;2 )当夜间通宵有风而次日天气晴朗时像质变好 ;3)多云过后的短暂晴天成像优良 ;4 )接连阴雨几天后的开始晴天像质较好。

Some preliminary conclusions of making better image quality are obtained by observing some effects of climate conditions on quality of solar image during spectral observations.They are: (1)Quality of imaging to be better when the wind stops or weaken suddenly during the wind blows continuously; (2)If the wind blows at the whole night and it is fine day in the next morning,then the image quality will be better than before. (3)The image quality is getting fine in short time after the cloudy. (4)The good solar image to be formed under the condition of a beginning of fine day after the cloudy or raining days.