Abstract

The concept of the quantity ro as a length that measures the effect of atmospheric turbulence on optical systems that are wavefront distortion sensitive is briefly reviewed. It is pointed out that no precise set of data on ro for propagation down through the atmosphere has been published. Using astronomical seeing data obtained by Hoag and by Meinel it is shown how statistics for ro can be derived, at least for observatory quality sites. We find that the two sets of data are in very good agreement and conclude that ro is variable from night to night and distributed according to a log-normal distribution. For 0.55-μm light and zenith propagation, the median value of ro is 0.114 m and changes by a factor of 1.36 for occurrences one standard deviation from the median.

© 1974 Optical Society of America

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Errata

D. L. Fried, "Evaluation of ro for propagation down through the atmosphere: correction," Appl. Opt. 14, 2567-2567 (1975)
https://www.osapublishing.org/ao/abstract.cfm?uri=ao-14-11-2567

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