Advanced geoacoustic inference and imaging from the SBP29
Abstract
Knowledge of seabed geoacoustic properties are needed for a variety of scientific, commercial, and military purposes. For example,they are crucial for predicting acoustic propagation in shallow water as well as bottom-limited areas on continental slopes and in the deep ocean. In this proposal, the focus is on the seabed deterministic and stochastic geoacoustic properties in the upper few tens of meters and frequencies from 2#9 kHz. The deterministic properties in the fluid approximation are sound speed, density, and attenuation; the stochastic properties describe smaller scale variability: interface roughness and sediment volume heterogeneity for example sediment lenses or embedded inclusions, e.g., bubbles.The long-term goals of this research are to measure seabed deterministic and stochastic geoacoustic properties and their variability over large regions at high spatial resolution and image the sub-seabedin 3 dimensions. The specific goals of this 3-year project are to a) develop methods to infer geoacoustic properties from a low-frequency multibeam system, the Kongsberg SBP29, b) help transition our cross-track sub-bottom imaging methodologies to a wider community of geoscientists and c) provide support for testing and evaluating new SBP29 installations on UNOLS vessels.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- May 15, 2024
- Source ID
- N000142412298
Entities
People
- Charles W. Holland
Organizations
- Office of Naval Research
- Portland State University
- United States Navy