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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
Ocean bottom
Underwater vehicles

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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