Accession Number:

ADA634341

Title:

Semiclassical Approximations and Predictability in Ocean Acoustics

Descriptive Note:

Corporate Author:

MIAMI UNIV FL ROSENSTIEL SCHOOL OF MARINE AND ATMOSPHERIC SCIENCE

Personal Author(s):

Report Date:

1997-09-30

Pagination or Media Count:

3.0

Abstract:

LONG-TERM GOALS. Our long-term goal is to understand limitations on the predictability of underwater sound fields in the ocean, especially using semiclassical ray-based methods. Improving our understanding of the mechanisms that contribute to the loss of predictability will lead to improved predictive models. OBJECTIVES. The scientific objective of this work is to understand the limitations of the validity of semiclassical wavefield representations in realistic ocean environments. There are two primary causes for the breakdown of ray methods 1 the accumulation of phase errors associated with the asymptotic validity of these methods and 2 in range-dependent environments the chaotic motion of ray trajectories limits one s ability to predict. We seek to improve our understanding of these phenomena to the point that we may quantitatively estimate the semiclassical predictability horizon.

Subject Categories:

  • Acoustics
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE