APPLICATION OF GEOGRAPHIC INFORMATION TECHNOLOGY TO PREPARE SEABED DATA FOR 3-D SONAR MODELLING

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Authors
  1. Holm, E.W.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN);Holm (Eric W), Halifax NS (CAN)
Abstract
The majority of monostatic sonar performance prediction models are two-dimensional. Furthermore, many of these assume the environment is horizontally stratified (i.e. range-independent). Significant effort at DREA as well as elsewhere is being placed on the development of three-dimensional acoustic models. By assuming that the effects of horizontal refraction are negligible, 2D (range-dependent) models may be extended to the 3D environment by considering a number of radials from the sonar location. A major difficulty of this approach is the manipulation of the spatial data in order to supply the 2D model with input. To this end, GIS (Geographic Information System) technology is being extended to manipulate raster maps of the environment parameters and output the information in a form appropriate for 2D acoustic models. The report describes the extensions to the GRASS GIS system implemented to process generic seabed data in a format required by the KRAKEN normal model model.
Keywords
KRAKEN;GRASS GIS
Report Number
DREA-CR-94-437 — Contractor Report
Date of publication
01 Jul 1994
Number of Pages
33
DSTKIM No
95-01578
CANDIS No
150983
Format(s):
Hardcopy;Document Image stored on Optical Disk

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