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Numerical simulation and measurements of acoustic transmissions from Heard Island to the equatorial Indian Ocean

DRS at CSIR-National Institute of Oceanography

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Title Numerical simulation and measurements of acoustic transmissions from Heard Island to the equatorial Indian Ocean
 
Creator PrasannaKumar, S.
Navelkar, G.S.
Murty, T.V.R.
Somayajulu, Y.K.
Saran, A.K.
Murty, C.S.
 
Subject acoustic tomography
acoustic properties
numerical analysis
simulation
 
Description Simulated acoustic propagation showed a gradual deepening of the ray paths from the southern ocean towards tropics. Also the axis of the sound channel deepens from 150 m to 1600 m. Sudden jumps were noticed in the acoustic ray paths in the vicinity of the Sub Tropical Convergence. Measured acoustic signals, received at the Indian listening station has a signal to noise ratio (SNR) of 20 dB on an average and confirmed their detectability over distances as far as 7000 km. The phase stability of these signals allowed coherent averaging time of 20 minutes for corresponding increase in the SNR. Measured intensity losses were about 135 dB in contrast to those computed values of 150 dB
 
Date 2009-01-21T11:16:55Z
2009-01-21T11:16:55Z
1996
 
Type Journal Article
 
Identifier Indian Journal of Marine Sciences, Vol.25; 173-178p.
http://drs.nio.org/drs/handle/2264/2256
 
Language en
 
Rights Copyright [1996]. All efforts have been made to respect the copyright to the best of our knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository.
 
Publisher NISCAIR, CSIR