Accession Number:

ADA612162

Title:

North Pacific Acoustic Laboratory: Scripps Institution of Oceanography

Descriptive Note:

Annual rept.

Corporate Author:

CALIFORNIA UNIV REGENTS LA JOLLA CA SCRIPPS INST OF OCEANOGRAPHY

Report Date:

2006-09-30

Pagination or Media Count:

10.0

Abstract:

The ultimate limits of long-range sonar are imposed by ocean variability and the ambient sound field. Uncertainty due to ocean variability limits our ability to make accurate predictions of acoustic propagation. Scattering due to internal waves and other ocean processes limits the temporal and spatial coherence of the received signal. The long-term objectives of the North Pacific Acoustic Laboratory NPAL program are to understand the basic physics of low-frequency, broadband propagation in deep water, the effects of environmental variability on signal stability and coherence, and the extent to which acoustic methods, together with other measurements and coupled with ocean modeling, can yield estimates of the time-evolving ocean state useful for acoustic predictions. The goal is to determine the fundamental limits to signal processing in deep water imposed by ocean processes, enabling advanced signal processing techniques, including matched field processing and other adaptive array processing methods, to capitalize on the three-dimensional character of the sound and noise fields.

Subject Categories:

  • Physical and Dynamic Oceanography
  • Acoustics
  • Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE