Time Dependent Statistics Of Upper Atmospheric Optical Turbulence

Norman J. Chonacky; Donald M. Stebbins

doi:10.1117/12.948396

9 September 1985 Time Dependent Statistics Of Upper Atmospheric Optical Turbulence

Norman J. Chonacky, Donald M. Stebbins

Proceedings Volume 0547, Effects of the Environment on Systems Performance; (1985) https://doi.org/10.1117/12.948396
Event: 1985 Technical Symposium East, 1985, Arlington, United States

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.

Citation Download Citation

Norman J. Chonacky and Donald M. Stebbins "Time Dependent Statistics Of Upper Atmospheric Optical Turbulence", Proc. SPIE 0547, Effects of the Environment on Systems Performance, (9 September 1985); https://doi.org/10.1117/12.948396

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