High Resolution Focusing Analysis and Inversion for Small Scatterer Detection
Abstract
The long-term goal of this project is to develop software to invert acoustic data from a towed source/receiver array for simultaneous velocity analysis, detection and material characterization of small-scale (7 to 15 cm) scatterers in the shallow ocean and seabed sediments. Detection will be achieved by providing a reflector map of the target region. Material characterization is provided through estimates of angularly dependent reflection coefficients at the surface of the target over multiple angles; angle versus offset analysis provides a basis for characterizing the internal material parameters of the target. The immediate objective is to complete the development of a computer code for towed array data that back propagates the data with a wavespeed that varies in all three spatial variables. The more long-term objectives are to continue to incorporate developments in the underlying theory into the software being developed for this application. For example, the theory is currently being extended to multipathing --- the case in which the ray trajectories from a point scatterer at depth form caustics in the subsurface, leading to multiple arrivals at the same observation point on the receiver array.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1998
- Accession Number
- ADA572650
Entities
People
- Norman Bleistein
Organizations
- Colorado School of Mines