Shallow Water Mid-Frequency Research and FY07 Experiment
Abstract
The top-level goals of this effort are to understand the important environmental processes, which impact mid-frequency sonar performances in shallow water environments; and to develop means to efficiently collect those environmental data. To understand mid-frequency (1-10 kHz) acoustics in shallow waters through measurements and modeling, including propagation, reflection, and forward- and backscatter. The LEAR acoustics field experiment as part of Shallow Water 2006 (SW06) project yielded abundant data sets carefully collected for the purpose of investigating mid-frequency (1-10 kilohertz) acoustics interacting with environments. Both acoustic data and relevant environmental data were measured contemporaneously to facilitate close model/data comparison. Acoustics objectives and tasks: (1) Direct-path bottom backscatter - what are the most important physical mechanisms? Equipment: APL 32 element vertical line array and DRDC, Canada parametric system; (2) Single interface forward scatter - what are the most important physical mechanisms (with by Peter Dahl). Equipment: APL's MORAY/BASS; (3) Short range (500 - 1000 meters) propagation through internal waves - can acoustic interaction with internal waves be modeled using deterministic measurements of internal waves? Equipment: APL's MORAY/BASS. In collaborations with oceanographic measurements by Henyey and Moum; and (4) Long-range (10 kilometers) propagation - can multiple interactions with rough boundaries actually simplify the field present at long ranges? Equipment: APL's MORAY/BASS. Complementary data from Scripps, University of Victoria, and DRDC, Canada.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 30, 2007
- Accession Number
- ADA569151
Entities
People
- Dajun Tang
Organizations
- University of Washington