Technique for the Accurate Positioning of Objects in an Ice-Covered Ocean

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Authors
  1. Verrall, R.I.
  2. Heard, G.J.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
A standard procedure in the underwater acoustics community is to determine the location of an array of hydrophones with acoustic techniques. Unfortunately, it is very hard to measure the accuracy of such techniques since there is nothing to which to compare the results. This report describes a way of suspending an array under the ice of the Arctic Ocean in such a way that the hydrophone locations are known accurately. Weights are suspended from the ice by three lines, and the array is stretched between the weights. This system was tried out near Alert, Nunavut, Canada in the spring of 2000, and this report discusses the various strengths and weaknesses of the support system. Accuracies of about 10 cm were obtained. A number of suggestions are made for simplifying the installation.
Keywords
Sleds;Snowmobiles;Hydrophone arrays
Report Number
DREA-TM-2000-103 — Technical Memorandum
Date of publication
01 Sep 2000
Number of Pages
41
DSTKIM No
CA010803
CANDIS No
515065
Format(s):
Hardcopy;Document Image stored on Optical Disk

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