APERTURE AVERAGING OF OPTICAL SCINTILLATION
RAND CORP SANTA MONICA CA
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The aperture-averaging factor os a circular aperture is derived. This factor gives the effect of a finite receiving aperture on spherical and plane waves in reducing the variance of a fluctuating light signal. Curves of the reduction factor and normalized signal standard deviation as a function of range and receiver aperture diameter are presented and are compared with those which were previously calculated. It is shown that Frieds results agree with the results obtained here only for propagation distance where the average field is down by a factor of the order e to the -1 power.
- Non-Radio Communications