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Proceedings Paper

Time Dependent Statistics Of Upper Atmospheric Optical Turbulence
Author(s): Norman J. Chonacky; Donald M. Stebbins
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Paper Abstract

We have obtained optical turbulence profiles consisting of values for the statistical parameter Cn-squared derived from stellar scintillations. Each profile consists of the values for Cn-squared determined for a collection of seven vertical positions (2-20km). These determinations are based upon measurements comprising the spatial spectrum of intensity scintillations observed across wavefronts arriving from a given star during a two-minute period of time. The profiles in this data base were obtained from two different locations over a period of several years; 1) CAOTF] Advanced Optical Test Facility at Verona, New York; 2) [AMOS] ARPA Maui Optical Station at Maui, Hawaii. We have time-analyzed the statistical fluctuations in the Cn-squared values obtained. This analysis has revealed that the turbulence fluctuations are statistically homogeneous for only relatively short periods of time. We shall report on several systematic changes in the statistical properties which we have found to occur over longer periods of time.

Paper Details

Date Published: 9 September 1985
PDF: 8 pages
Proc. SPIE 0547, Effects of the Environment on Systems Performance, (9 September 1985); doi: 10.1117/12.948396
Show Author Affiliations
Norman J. Chonacky, Rome Air Development Center (United States)
Donald M. Stebbins, Rome Air Development Center (United States)

Published in SPIE Proceedings Vol. 0547:
Effects of the Environment on Systems Performance
Richard Gomez, Editor(s)

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