Accession Number:

ADA550835

Title:

Investigation of Parametric Acoustic Response of a Fluctuating Ocean

Descriptive Note:

Annual rept.

Corporate Author:

WASHINGTON STATE UNIV PULLMAN DEPT OF PHYSICS

Personal Author(s):

Report Date:

1998-01-01

Pagination or Media Count:

3.0

Abstract:

The long-term goals are 1 to take advantage of the ever-changing ocean environments effects in order to provide a more complete understanding of long-range acoustic pulse propagation including extracting parameters characterizing the ocean environment, for example, by linking them to range scales of temporal decorrelations in arriving signals, 2 understanding the extent of fundamental limitations on ray-based acoustic tomography of particular interest is the breakdown range of semiclassical methods, and 3 to address important basic physics issues that arise in the ocean problem, but within a more general context. There are two primary scientific objectives of this work 1 to begin developing a geometric acoustics theory that addresses parametrically varying ocean environments in the presence of ray chaos, determines what information survives under such conditions, and determines how to extract it, and 2 to determine the sensitivity of acoustic wavefields to relevant ocean environment parameters thereby connecting the scale of changes in the ocean to range scales of wavefield correlation decay.

Subject Categories:

  • Physical and Dynamic Oceanography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE