Propogation-Loss Measurements and Modelling for Topographically Smooth and Rough Seabeds

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Authors
  1. Staal, P.R.
  2. Desharnais, F.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
Acoustic propagation loss data were obtained along two radial tracks from a receiving array at a site on the Scotian Shelf. One track was over a smooth seabed and the other over a rough seabed. The features of the propagation loss data for the two seabed types have been analyzed and compared. At-sea measurements show that fluctuations in the propagation loss data are correlated with water-depth variations for the case of the rough seabed. Two different propagation-loss modelling programs are used in an attemt to explain the acoustic features observed over the two seabeds. The majority of the modelled results were obtained with PROLOS, a DREA-developed range-dependent normal-mode program. The results of a ray-trace propagation-loss model (GRASS) are also compared with the measured data. TRUNCATED
Report Number
DREA-TM-89-214 — Technical Memorandum
Date of publication
15 Jun 1989
Number of Pages
40
DSTKIM No
89-03422
CANDIS No
61322
Format(s):
Hardcopy;Originator's fiche received by DSIS;Electronic Document(PDF)

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