2D Quantitative Geoacoustic Mapping of Layered Muddy Seabeds
Abstract
Sonar performance prediction in shallow-water regions is strongly affected by geoacoustic properties of the seabed, including their" depth dependence, lateral variability and dispersion characteristics. To address the need for knowledge of seabed properties, the long-term goal of our work is to develop practical, autonomous approaches to quantitative regional geoacoustic inversion providing high-resolution 3D (area/depth) sediment models. The goal of this proposal is to develop sequential inversion for acoustic data collected along a survey track to estimate 2D (range/depth) geoacoustic models, with application to data collected during the 2017 Seabed Characterization Experiment (SBCEX17). In particular, the proposed research will focus on reflection-coefficient data derived from two 25-km long tracks of towed-array data collected by the Pennsylvania State University. The envisioned outcomes are 2D maps of geoacoustic properties along the survey tracks with quantitative uncertainty analysis. Investigations of the frequency dependence (dispersion) of the velocity and attenuation of compressional and shear waves, as well as comparisons with direct measurements and inver"sion results from other SBCEX17 participants, will also be conducted during the course of this research.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jun 13, 2019
- Source ID
- N000141912445
Entities
People
- Yong Min Jiang
Organizations
- Office of Naval Research
- United States Navy
- University of Victoria