Estimating Fried’s parameter from a time series of an arbitrary resolved object imaged through atmospheric turbulence
Estimating Fried’s parameter from a time series of an arbitrary resolved object imaged through atmospheric turbulence
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DOI：
10.1364/josaa.1.000510
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发表时间：
1984-05
影响因子：
1.9
通讯作者：
O. V. D. Luehe
中科院分区：
文献类型：
--
作者：
O. V. D. Luehe
提出了一种从任意形状、解析结构的时间序列中获得弗里德视宁度参数r0估计值的方法，该结构表现出大气湍流导致的退化。其基本思想是评估所观察到的平均傅里叶变换的平方模与所观察到的平均功率谱的比率。本文阐述了该方法的原理，并讨论了噪声对该比值的影响。该方法已被应用到五个连续的时间序列的观测太阳颗粒在不同的视情况下。用适当的理论调制传递函数重构的功率谱收敛。
A method to obtain an estimate of Fried’s seeing parameter r0 from time series of an arbitrarily shaped, resolved structure that exhibits degradation resulting from atmospheric turbulence is presented. The basic idea is to evaluate the ratio of the observed squared modulus of the average Fourier transform and the observed average power spectrum. The theory of the method is developed, and the influence of noise on the ratio is discussed. The method has been applied to five consecutive time series of observations of solar granulation under different seeing conditions. The power spectra, which are reconstructed with appropriate theoretical modulation transfer functions, converge.