| 湍流大气的像质衰减参数及测量 |
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| 引用本文： | 刘忠.湍流大气的像质衰减参数及测量[J].天文研究与技术,1998(1). |
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| 作者姓名： | 刘忠 |
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| 作者单位： | 中国科学院云南天文台 |
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| 摘 要： | 讨论了经过大气后天文图象的象质衰减，研究了对这种衰减进行描述的视宁度参数ｒ０及其它几个大气光学参数，介绍了几种测量象质衰减参数的方法，重点介绍了我们将差分像运动法运用于白日视宁度测量的尝试以及新设计的可兼顾昼夜的视宁度测量仪，仪器已用于云台白日的视宁度测量。最后对近场近似假设进行了定量分析，在此基础上给出了新确定的近场近似成立的范围，这一范围比以前所给的要更大些。
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| 关 键 词： | 湍流 视宁度 传递函数 象质衰减 |
Parameters of Random Atmosphere and its Measurement |
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| Liu Zhong,M.S.Parameters of Random Atmosphere and its Measurement[J].Astronomical Research & Technology,1998(1). |
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| Authors: | Liu Zhong MS |
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| Abstract: | The reason of image quality degradation of astronomical image through the random atmosphere is discussed. The seeing parameter r 0 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 Monitor) 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 approximation applies is given. |
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| Keywords: | Turbulence Seeing Transform funtion Image quality degradation |
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