Accession Number:

ADA238952

Title:

Analysis and Mitigation of Optical Turbulence Effects

Descriptive Note:

Final rept. 1 Feb 1990-28 Feb 1991

Corporate Author:

VISTA RESEARCH INC MOUNTAIN VIEW CA

Personal Author(s):

Report Date:

1991-06-01

Pagination or Media Count:

46.0

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 Shkarofskys 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.

Subject Categories:

  • Atmospheric Physics
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE