APERTURE AVERAGING OF OPTICAL SCINTILLATION

Abstract

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 Fried's 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.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1969
Accession Number
AD0688411

Entities

People

  • H. T. Yura
  • R. F. Lutomirski

Organizations

  • RAND Corporation

Tags

Communities of Interest

  • Air Platforms
  • C4I

DTIC Thesaurus Topics

  • Amplitude
  • Atmospheric Motion
  • Data Science
  • Diameters
  • Information Science
  • Intensity
  • Mathematical Analysis
  • Mathematics
  • Plane Waves
  • Refractive Index
  • Spherical Waves
  • Standards
  • Turbulence
  • Waves

Fields of Study

  • Physics

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Life Cycle Cost Analysis