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Evaluation of performance of Son Tek Argonaut acoustic doppler velocity log in tow tank and sea

DRS at CSIR-National Institute of Oceanography

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Title Evaluation of performance of Son Tek Argonaut acoustic doppler velocity log in tow tank and sea
 
Creator Joseph, A.
Madhan, R.
Mascarenhas, A.A.M.Q.
Desai, R.G.P.
VijayKumar, K.
Dias, M.
Tengali, S.
Methar, A.
 
Subject accoustic equipment
doppler sona
performance assessment
velocity
 
Description Performance of a 500-kHz, 3-beam downward-looking Sontex Argonaut acoustic Doppler velocity log (DVL) based on measurements at tow-tank and sea is addressed. Its accuracy and linearity under tow-tank measurements were largely scattered and inconsistent within the towing speed band of approx. or equal to plus or minus 50 cm/s. Outside of this band, its motion speed output exhibited unexpectedly large error (within the range of -52% and -72% of towing speed) as a result of a computational error in its 'beam' mode of operation. However, it was possible to improve its mean accuracy to better than plus or minus 5% of the towing speed by recalculating the motion speed based on beam-velocity outputs and the orientation of the three beams relative to the direction of motion. The DVL's 'XYZ' mode of operation at sea exhibited motion speed accuracy better than plus or minus 5 cm/s beyond the towing speed of 250 cm/s. Tow tank measurements under static conditions exhibited speed output values up to 120 cm/s. Measurements have indicated deteriorated performance at speeds within plus or minus 50 cm/s under constricted environments where the signal-to-noise ratio might be poor
 
Date 2008-07-18T05:39:00Z
2008-07-18T05:39:00Z
2003
 
Type Conference Article
 
Identifier SYMPOL - 2003: Proceedings of the National Symposium on Ocean Electronics, 16-17 December 2003, eds. Chander, V.; Pillai, P.R.S. 1-10p.
http://drs.nio.org/drs/handle/2264/1230
 
Language en
 
Rights Copyright [2003]. It is tried to respect the rights of the copyright holders to the best of the knowledge. If it is brought to our notice that the rights are violated then the item would be withdrawn.
 
Publisher Allied, India