Semiclassical Approximations and Predictability in Ocean Acoustics
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 mechanism(s) 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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 30, 1997
- Accession Number
- ADA634341
Entities
People
- Michael G. Brown
Organizations
- University of Miami