Effect Of The Turbulence Inner Scale On Scintillation In The Atmosphere

Mark J. Beran; Alan M. Whitman

doi:10.1117/12.960855

11 October 1989 Effect Of The Turbulence Inner Scale On Scintillation In The Atmosphere

Mark J. Beran, Alan M. Whitman

Proceedings Volume 1115, Propagation Engineering; (1989) https://doi.org/10.1117/12.960855
Event: SPIE 1989 Technical Symposium on Aerospace Sensing, 1989, Orlando, FL, United States

Abstract

Scintillation indices as high as four to six have been measured in experiments in the atmosphere. The inner scale of turbulence has a dramatic effect on the value of the scintillation index when the index is greater than unity. Here we review theory which shows that, in order to obtain such high values, it is necessary to modify the Kolmogorov form by the addition of an inner scale. We present results for plane wave and point source initial conditions and show that, without an inner scale, the maximum scintillation index that may be obtained is much below experimental results. Moreover, we show that, even with the inner scale included, we must have a point-source-type initial condition rather than a plane-wave-type initial condition. We also discuss the effect of the particular modification of the Kolmogorov form that is used to introduce the inner scale.

Citation Download Citation

Mark J. Beran and Alan M. Whitman "Effect Of The Turbulence Inner Scale On Scintillation In The Atmosphere", Proc. SPIE 1115, Propagation Engineering, (11 October 1989); https://doi.org/10.1117/12.960855

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