Geoacoustic and Tomographic Inversion of Haro Strait Data
Abstract
The primary long term objective of this project remains: To provide a real-time, area-wide technique in shallow water for the estimation of volumetric (3-D) geoacoustic parameters. These parameters are vital inputs for SONAR models (and subsequent signal processing and target localization methods) and include: geometric values (such as source location, array element location, and water depths) as well as bottom properties (such as sediment layer thicknesses, sound-speed profiles, densities, and attenuations). This area- wide estimation would be made via multiple air-deployed receiver arrays and multiple broadband air-deployed low frequency sources. The objectives of this second year's work included: (1) Investigation of array configurations (phone depths and ranges). No sensors were applied to Haro Strait arrays to give information on phone locations. Thus, what happens when unknown array parameters are simply added to the overall parameter search space?; (2) Broadband (BB) inversion using MFP (with 4 frequencies all of which must have Bartlett values greater than 0.90 at each frequency). Will 4 frequencies be sufficient to allow GI convergence to a solution , even for simulated data ?; (3) Consideration of concurrent multiple sources for GI. What can we gain by the consideration of more than one source for an inversion?; and (4) Demonstration of a full tomographic inversion of Haro St. data.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 30, 2007
- Accession Number
- ADA569153
Entities
People
- A. Tolstoy