Accession Number:

ADA003406

Title:

Irradiance Fluctuations of a Spherical Wave Propagating under Saturation Conditions.

Descriptive Note:

Interim rept.,

Corporate Author:

AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS

Personal Author(s):

Report Date:

1974-12-17

Pagination or Media Count:

22.0

Abstract:

The recent physical model of strong optical scintillation of plane waves is extended to the case of spherical-wave propagation. The spherical-wave amplitude filter function is derived and compared to the corresponding plane-wave result. Specifically, the spherical- to plane-wave log-amplitude-variance ratio is calculated. For weak fluctuations, our results are identical to the results of perturbation theory, where the spherical-wave log-amplitude variance is less than the corresponding plane-wave result. On the other hand, for strong fluctuations i.e., in the saturation regime, it is shown that the plane- and spherical-wave log-amplitude variances saturate to the same constant value. Additionally, expressions are presented in the saturation regime for the plane- and spherical-wave log-amplitude covariance function and compared with the corresponding results in the regime of weak fluctuations.

Subject Categories:

  • Atmospheric Physics
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE