Numerical simulation and measurements of acoustic transmissions from Heard Island to the equatorial Indian Ocean
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...
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ftnio:oai:dsr.nio.org:2264/2256 2023-05-15T16:33:55+02:00 Numerical simulation and measurements of acoustic transmissions from Heard Island to the equatorial Indian Ocean PrasannaKumar, S. Navelkar, G.S. Murty, T.V.R. Somayajulu, Y.K. Saran, A.K. Murty, C.S. 1996 http://drs.nio.org/drs/handle/2264/2256 en eng NISCAIR, CSIR 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. acoustic tomography acoustic properties numerical analysis simulation Journal Article 1996 ftnio 2012-08-25T20:06:58Z 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 Article in Journal/Newspaper Heard Island Southern Ocean National Institute of Oceanography, India: Digital Repository Service (DRS@nio) Southern Ocean Heard Island Indian |
institution |
Open Polar |
collection |
National Institute of Oceanography, India: Digital Repository Service (DRS@nio) |
op_collection_id |
ftnio |
language |
English |
topic |
acoustic tomography acoustic properties numerical analysis simulation |
spellingShingle |
acoustic tomography acoustic properties numerical analysis simulation PrasannaKumar, S. Navelkar, G.S. Murty, T.V.R. Somayajulu, Y.K. Saran, A.K. Murty, C.S. Numerical simulation and measurements of acoustic transmissions from Heard Island to the equatorial Indian Ocean |
topic_facet |
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 |
format |
Article in Journal/Newspaper |
author |
PrasannaKumar, S. Navelkar, G.S. Murty, T.V.R. Somayajulu, Y.K. Saran, A.K. Murty, C.S. |
author_facet |
PrasannaKumar, S. Navelkar, G.S. Murty, T.V.R. Somayajulu, Y.K. Saran, A.K. Murty, C.S. |
author_sort |
PrasannaKumar, S. |
title |
Numerical simulation and measurements of acoustic transmissions from Heard Island to the equatorial Indian Ocean |
title_short |
Numerical simulation and measurements of acoustic transmissions from Heard Island to the equatorial Indian Ocean |
title_full |
Numerical simulation and measurements of acoustic transmissions from Heard Island to the equatorial Indian Ocean |
title_fullStr |
Numerical simulation and measurements of acoustic transmissions from Heard Island to the equatorial Indian Ocean |
title_full_unstemmed |
Numerical simulation and measurements of acoustic transmissions from Heard Island to the equatorial Indian Ocean |
title_sort |
numerical simulation and measurements of acoustic transmissions from heard island to the equatorial indian ocean |
publisher |
NISCAIR, CSIR |
publishDate |
1996 |
url |
http://drs.nio.org/drs/handle/2264/2256 |
geographic |
Southern Ocean Heard Island Indian |
geographic_facet |
Southern Ocean Heard Island Indian |
genre |
Heard Island Southern Ocean |
genre_facet |
Heard Island Southern Ocean |
op_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. |
_version_ |
1766023653894389760 |