Reverberation Calculations over Sloping Ocean Bottoms

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Authors
  1. Kwan, T.
  2. Ellis, D.D.
Corporate Authors
Defence R&D Canada - Atlantic, Dartmouth NS (CAN);Victoria Univ, Victoria BC (CAN) Dept of Physics and Astronomy
Abstract
Initial attempts at developing a shallow-water, range-dependent, normal mode reverberation model using the adiabatic approximation are described. The implementation of this model lies in a newly developed Matlab control script named Reader and a legacy Fortran program named PROLOS. Reader creates and sends to PROLOS a sequence of data files that reflect the environmental properties along a single radial path away from the source and receiver. PROLOS reads these and in return produces range-dependent modal quantities which Reader records and loads onto the Matlab Workspace for user manipulation. Through Matlab, range-dependent reverberation calculations were made and the results plotted. Preliminary validation of the model was done through comparison with published results. Model predictions show excellent consistency with benchmark results for the flat bottom case. In the case of a sloped bottom, there was reasonable agreement between the model and the published predictions with most of the deviation appearing near mode cutoff in upslope environments.

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Report Number
DRDC-ATLANTIC-TM-2009-192 — Technical Memorandum
Date of publication
01 Jun 2010
Number of Pages
78
DSTKIM No
CA034937
CANDIS No
534460
Format(s):
Electronic Document(PDF)

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