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

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.