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References

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  1. J. W. Strohbehn, J. Opt. Soc. Am. 58, 139 (1968).
    [Crossref]
  2. D. A. deWolf, J. Opt. Soc. Am. 58, 461 (1968).
    [Crossref]
  3. G. R. Ochs, R. R. Bergman, and J. R. Snyder, J. Opt. Soc. Am. 59, 231 (1969).
    [Crossref]
  4. D. L. Fried, J. Opt. Soc. Am. 57, 175 (1967).
    [Crossref]

1969 (1)

1968 (2)

1967 (1)

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Figures (3)

Fig. 1
Fig. 1

Log-amplitude variance as a function of Mountain Daylight Time 15 May 1968. Cl(0) is measured every 5 min from light received in a 1-mm aperture at the end of a 990-m optical path 2 m above the ground. Cls(0) is determined from the average of three temperature structure-function measurements made along the path 250, 500, and 750 m from the receiver. Wind velocity is measured at the receiver.

Fig. 2
Fig. 2

Log-amplitude variance of light fluctuations received from 2100 MDT, 14 May, to 0555 MDT, 16 May 1968 in a 1-mm aperture at the end of a 990-m optical path 2 m above the ground. Observed log-amplitude variance Cl(0) is plotted vs log-amplitude variance Cls(0) predicted from spherical wave propagation theory. Cls(0) is determined from a temperature structure-function measurement made near the center of the path.

Fig. 3
Fig. 3

Irradiance probability distributions of light fluctuations received in a 1-mm aperture over a path length of 990 m during periods of high refractive-index fluctuations. The irradiance level is plotted vs the percentage of time the signal is below this level. Upper curve: 1236–1238 MDT, 3 June 1968, Cl(0) = 0.69; lower curve: 1224–1226 MDT, 11 June 1968, Cl(0) = 0.66.

Equations (1)

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C l s ( 0 ) = 0.124 ( 2 π / λ ) 7 / 6 Z 11 / 6 C n 2 .