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Canonical sound speed profile and related ray acoustic parameters in the Bay of Bengal

DRS at CSIR-National Institute of Oceanography

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Title Canonical sound speed profile and related ray acoustic parameters in the Bay of Bengal
 
Creator Murty, T.V.R.
Sadhuram, Y.
Rao, M.M.M.
Rao, B.P.
SuryaPrakash, S.
Chandramouli, P.
Murthy, K.S.R.
Prasad, K.V.S.R.
 
Description Following Munk's canonical theory, canonical parameters (i.e., B the stratification scale and epsilon the perturbation coefficient) in adiabatic ocean are obtained using SOFAR channel parameters (i.e., C sound velocity at the channel axis, Z sub(1) the depth of the channel axis) from the CTD data collected on board ORV Sagarkanya Cruise No. 30 at 17 degrees 36.21 minutes N, 84 degrees 35.31 minutes E, during March, 11-20, 1987 in the Bay of Bengal to develop the stratified model for implementation in the numerical ray tracing to study the ocean acoustic parameters namely eigen rays, travel time, turning depths, transmission loss etc., for source-receiver configuration kept at channel axis. The simulated acoustic ray parameters of canonical ocean reveals that the even very flat angle rays can scan entire water column with repeated reflections from both surface and bottom due to depth limited nature of sound channel and weak gradients of sound velocity prevailing in the medium on either side of the sound channel axis. This nature of phenomenon usually occurs in the case of 'shallow-water channel'. This paper also describes degeneracy of the ray paths, which arrive simultaneously. Since the results are generated through simplest sound channel (exponential stratified model) above and beneath the sound axis which are more useful as a priori knowledge before conducting actual sound transmission experiment in the area of interest
 
Date 2008-02-22T06:39:48Z
2008-02-22T06:39:48Z
2005
 
Type Conference Article
 
Identifier Proceedings of National Symposium on Half A Century Progress in Oceanographic studies of North Indian Ocean since Prof. La Fond's Contributions (HACPO), ed. by: Prasad, K.V.S.R. 8-17p.
no
http://drs.nio.org/drs/handle/2264/1027
 
Language en
 
Rights Copyright [2005]. It is tried to respect the rights of the copyright holders to the best of the knowledge. If it is brought to our notice by copyright holder that the rights are voilated then the item would be withdrawn.
 
Publisher Andhra University