Accession Number : ADA267300


Title :   Sound Speed Profiles from Vertical Array Data


Corporate Author : IOWA UNIV IOWA CITY DEPT OF PHYSICS AND ASTRONOMY


Personal Author(s) : Berman, David H


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a267300.pdf


Report Date : 08 Jun 1993


Pagination or Media Count : 30


Abstract : A scheme for extracting sound speed information from vertical arrays in shallow water is examined. The scheme hinges on the covariance matrix of the pressures received at the array being diagonal in the modes of the water column, and involves computing second derivatives of the covariance. Conditions under which the covariance might be mode-diagonal are examined. It is found that without attenuation, it is unlikely to find mode-diagonal covariances. However with reasonable attenuations, the covariance will be dominated by the lowest mode. The scheme described here is applied to vertical array data taken in 1985.


Descriptors :   *ACOUSTIC ARRAYS , *UNDERWATER ACOUSTICS , *ACOUSTIC VELOCITY , VELOCITY , WATER , PRESSURE , ATTENUATION , ACOUSTIC ATTENUATION , HYDROPHONES , COVARIANCE , SOUND , ARRAYS , SHALLOW WATER


Subject Categories : Acoustic Detection and Detectors


Distribution Statement : APPROVED FOR PUBLIC RELEASE