North Pacific Acoustic Laboratory (NPAL) - Measurement and Modeling of Long Range Ocean Acoustics
Abstract
The long-term goals of this research is to understand deep-water propagation, with particular emphasis placed on the passive quiet target detection problem. Focus is on the spatial/temporal structure of acoustic paths for moving sources and moving receivers. Propagation paths are separated into two classes: bottom interacting and refracted/surface-reflected (non-bottom interacting). This research seeks to understand the impact that mid-ocean variability (internal waves, mixed layer variability) and seafloor scattering have on the detection problem. OBJECTIVES The objectives of the FY10 effort were to process FY09 data and conduct the FY10 experiment to measure acoustic signals for a set of propagation paths. The FY09 sources included an axial moored source, a ship towed shallow source and a ship suspended axial source. Specific scientific objectives are: to develop an understanding of the sensitivity of the structure of the convergence zone to ocean meso-scale variability; to investigate the structure and spatial variability of bottom bounce acoustic paths; to develop an understanding of the sound field behind a ridge or seamount.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 30, 2010
- Accession Number
- ADA542051
Entities
People
- Kevin D. Heaney
- Richard L. Campbell