Parameters of Random Atmosphere and its Measurement
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Graphical Abstract
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Abstract
The reason of image quality degradation of astronomical image through the random atmosphere is discussed. The seeing parameter r0 and the other optical parameters describing the image quality degradation are studied and the methods used to measure these paremeters are introduced. A new instrument(Solar Lamb Different Image Motion Mo nitor)that can measure day-time seeing and night-time seeing was built in Yunnan Observatory. It is the first time that the differential image motion method can be used to measure the day-time seeing. The day-time seeing data obtained with SLDIMM at Yunnan Observatory is also given in the thesis. At last, the near-field approximation is quantitatively analysized. As a result, a new wide region inside which the near-field appro ximation applies is given.
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