Analysis and Mitigation of Optical Turbulence Effects

Abstract

This document describes a consistently formulated propagation model for systems-oriented predictive codes. Simple models for the mutual coherence function of plane, spherical, and beam waves are developed. The results are given in terms of a path-integrated phase structure function based on Shkarofsky's approximation to the Kolmogorow Model. A scheme for approximating the short-term mutual coherence function by approximating the phase structure function is developed. To provide a more quantitative measure of the recoverable degradation in an image, the instantaneous autocorrelation function for a refocused beam was simulated by using a phase-screen model. The results show that the short-term and long-term coherence measures are not linearly related. The difference is attributed to amplitude scintillation, which is not comprehended in phase reconstruction schemes.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1991
Accession Number
ADA238952

Entities

People

  • Angela Regalia
  • C. L. Rino

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Atmospheric Motion
  • Atmospheric Sciences
  • Boundary Layer
  • Computational Fluid Dynamics
  • Computational Science
  • Contracts
  • Differential Equations
  • Equations
  • Frequency
  • Linear Systems
  • Path Integrals
  • Plane Waves
  • Refractive Index
  • Security
  • Spherical Waves
  • Statistics
  • Wave Equations

Fields of Study

  • Physics

Readers

  • Astronomy and Astrophysics.
  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Computational Modeling and Simulation