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Accession Number ADA571682
Title Seabed Geoacoustic Structure at the Meso-Scale.
Publication Date Sep 2011
Media Count 7p
Personal Author C. W. Holland
Abstract LONG TERM GOALS: The long term science goals are to understand the nature of seabed variability at meso-scales O(101- 103) m and determine how meso-scale structures impact acoustic propagation, diffuse reverberation, and clutter. OBJECTIVES: The objectives are to develop new observational methods to quantify meso-scale seabed variability/uncertainty and also develop modeling techniques to understand the impact of spatial variability on propagation and reverberation. APPROACH: The observational approach is based on direct path measurements of seabed reflection and scattering. The key advantages of this approach are: (1) high resolution vertically, 0.1m and laterally: inner scale of approximately 10m and outer scale of 100 km; (2) it substantially reduces uncertainties from the space/time-varying oceanography and biology due to short path lengths; (3) it requires a low source level; (4) can be hosted on an Autonomous Undersea Vehicle (AUV), permitting observations of 3D meso-scale features, and making it an attractive eventuality as a survey tool. A cartoon of the system is shown in Figure 1.
Keywords Biology
Diffusion
Geoacoustics
Impact
Measurement
Methodology
Models
Ocean bottom
Reflection
Scattering
Sources
Surveys
Tools
Underwater vehicles
Variations


 
Source Agency Non Paid ADAS
NTIS Subject Category 47C - Physical & Chemical Oceanography
46A - Acoustics
Corporate Author Pennsylvania State Univ., State College. Applied Research Lab.
Document Type Technical report
Title Note Annual rept.
NTIS Issue Number 1316
Contract Number N00014-11-1-0124

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