Proceedings of Geoclutter and Boundary chraacterization 2001. Acoustic interaction with the seabed, workshop held at DREA, Canada 2-3 October, 2001


  1. Hines, P.C.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN)
In April-May 2001, consecutive sea trials were conducted at two well characterized shallow water sites off of North America's east coast - the Strataform site off the coast of New Jersey and Scotian Shelf off the coast of Nova Scotia. The trials were in support of two distinct but related research programs referred to respectively as GeoClutter and Boundary Characterization. The focus for Geoclutter is to develop a methodology for identifying and classifying false targets (in the ASW context) present in littoral waters. These false targets typically occur when Low Frequency Active (LFA) sonars measure strong coherent returns from the seabed at locations where bathymetric maps indicate benign bottoms. This frequently occurs in littoral waters where, for example, ancient river channels are overlaid with soft sediment. The high-frequency systems employed to measure bathymetry are unable to penetrate the seabed so that these complex sub-bottom features go unnoticed. Boundary Characterization seeks to enhance active sonar design as well as performance prediction capabilities in littoral waters by statistically characterizing the effects of the complex seafloor and sea surface on broadband scattering and propagation of sound. The principal focus of the project is the development of techniques to measure the environmental parameters that control diffuse reverberation in the low kiloHertz band. TRUNCATED

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Report Number
DREA-TM-2001-185 — Technical Memorandum
Date of publication
01 Oct 2001
Number of Pages
Hardcopy;Document Image stored on Optical Disk

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