Accession Number:

ADA235184

Title:

Backscattering from Rough Interfaces and the Parabolic Approximation

Descriptive Note:

Technical memo.,

Corporate Author:

PENNSYLVANIA STATE UNIV UNIVERSITY PARK APPLIED RESEARCH LAB

Personal Author(s):

• McDaniel, S. T.

Report Date:

1991-04-12

Pagination or Media Count:

31.0

Abstract:

Iterative solutions of coupled parabolic wave equations are examined to determine the validity of applying this method to predict low frequency ocean acoustic reverberation. Solutions for backscattering from a random rough interface between two media of differing wave number are obtained in the form of an expansion in powers of the rough interface excursion from its mean value. This expansion is found to differ significantly from the corresponding expansion obtained by applying perturbation theory to the full elliptic wave equation.

Descriptors:

• *WAVE EQUATIONS
• *BACKSCATTERING
• INTERFACES
• SOLUTIONS(GENERAL)
• PARABOLAS
• ELLIPSES
• MEDIA
• MEAN
• ITERATIONS
• ROUGHNESS
• FREQUENCY
• COUPLING(INTERACTION)
• PERTURBATION THEORY

Subject Categories:

• Numerical Mathematics
• Acoustics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE