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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 60, Iss. 7 — Jul. 1, 1970
  • pp: 948–950

Remote Sensing of Clear-Air Turbulence

JOHN W. STROHBEHN  »View Author Affiliations

JOSA, Vol. 60, Issue 7, pp. 948-950 (1970)

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The feasibility of detecting clear-air turbulence layers (CAT) by measuring the covariance function of the fluctuations in log amplitude of an optical signal propagated through the atmosphere is discussed. In particular, the problem of determining Cn2(z), the magnitude of the refractive-index fluctuations, is investigated. It is extremely unlikely that CAT can be detected from such measurements. Variations of the log-amplitude covariance function induced by CAT layers are so small that they will normally be masked by variations expected in other atmospheric parameters, such as changes of the spectral density of the refractive index or nonhomogeneity of the medium. There appears to be more promise in measurements that more directly measure the wind; further studies of this type are recommended.

JOHN W. STROHBEHN, "Remote Sensing of Clear-Air Turbulence," J. Opt. Soc. Am. 60, 948-950 (1970)

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  1. A. Peskoff, J. Opt. Soc. Am. 58, 1032 (1968).
  2. D. L. Fried, Proc. IEEE 57, 415 (1969).
  3. V. I. Tatarski, Wave Propagation in a Turbulent Medium (McGraw–Hill, New York, 1961).
  4. B. R. Bean, Proc. Conf. on Tropospheric Wave Propagation, 30 Sept.–2 Oct. 1968, The Inst. of Elec. Engr., London, Conference Publication No. 48.
  5. J. W. Strohbehn, Proc. IEEE 56, 1301 (1968).
  6. J. W. Strohbehn, J. Geophys. Res. 75, 1067 (1970).
  7. R. W. Lee and J. C. Harp, Proc. IEEE 57, 375 (1969).

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