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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 60, Iss. 6 — Jun. 1, 1970
  • pp: 826–830

Measurements of Atmospheric Turbulence Relevant to Optical Propagation

R. S. LAWRENCE, G. R. OCHS, and S. F. CLIFFORD  »View Author Affiliations

JOSA, Vol. 60, Issue 6, pp. 826-830 (1970)

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The aspect of atmospheric turbulence of interest to optical-propagation studies is the variation of refractive index. We demonstrate the application of high-speed temperature sensors to the direct measurement of this variation at optically important scale sizes, as small as a few millimeters. The thermometers, used in pairs with spacings ranging from 3 mm to 1 m, disclose that the turbulence near the ground frequently differs substantially from the Kolmogoroff model, and that the temperature difference does not follow the gaussian probability-distribution function. A model of the turbulent atmosphere containing sharply bounded regions with stronger than average turbulence agrees well with our observations. We also demonstrate the use of a single sensor mounted on an airplane to observe refractive-index variations at heights up to 3 km.

R. S. LAWRENCE, G. R. OCHS, and S. F. CLIFFORD, "Measurements of Atmospheric Turbulence Relevant to Optical Propagation," J. Opt. Soc. Am. 60, 826-830 (1970)

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