A range-dependent analysis of acoustic transmission across a cold filament in the California Current.
Jendro, Lawrence M.
Ramp, Steven R.
Bourke, Robert H.
MetadataShow full item record
CTD data were taken in a area where satellite imagery had detected a cold water filament to frequently recur in the California Current System in order to determine the temporal and spatial variability of the hydrographic and velocity fields. Sound speed profiles were constructed from this data and predicted sonar ranges (PSRs) were computed for passive sonar using a range-dependent parabolic equation model. Analysis of model results applied to tactical scenarios showed the acoustic advantage between two adversaries to change as their positions relative to the front and to each other were changed. An investigation of the acoustic mechanisms involved in the variation of PSRs showed that small variations in surface temperature were enough to cause significant changes in PSRs. Changes in temperature of sufficient magnitude to effect PSRs were found also in SST imagery of cold filaments in other eastern boundary currents around the world.
RightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
Showing items related by title, author, creator and subject.
Reeder, D.B. (2014);Investigations of near-shore and in-shore environments have, rightly, focused on geological, thermodynamic and hydrodynamic parameters. A complementary acoustical characterization of the estuarine environment provides ...
Simulation of the acoustic pulse expected from the interaction of ultra-high energy neutrinos and seawater Gruell, Michael S. (Monterey, California. Naval Postgraduate School, 2006-03);The purpose of this thesis was to design, build, and test a device capable of simulating the acoustic pulse expected from the interaction between an Ultra-High Energy (UHE) neutrino and seawater. When a neutrino interacts ...
Alves, Fabio; Karunasiri, Gamani (2018-04-18);When compared with the electromagnetic counterparts, acoustic sensors have many advantages that include non-line-of-sight, passive, low-cost, and low power, weight, and size. Acoustic sensors are the primary sensors employed ...