Assessment of ocean prediction model for Naval Operations using acoustic preset
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Authors
Chu, Peter C.
Cwalina, David S.
Amezaga, Guillermo
Gottshall, Eric L.
Subjects
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Date of Issue
2005
Date
2005
Publisher
Language
Abstract
The outcome of a battlefield engagement is
often determined by the advantages and disadvantages held
by each adversary. On the modern battlefield, the possessor
of the best technology often has the upper hand, but only if
that advanced technology is used properly and efficiently. In
order to exploit this advantage and optimize the effectiveness
of high technology sensor and weapon systems, it is essential
to understand the impact on them by the environment. In the
arena of Anti-Submarine Warfare (ASW), the ocean
environment determines the performance of the acoustic
sensors employed and the success of any associated weapon
systems. Since acoustic sensors detect underwater sound
waves, understanding how those waves propagate is crucial
to knowing how the sensors will perform and being able to
optimize their performance in a given situation. To gain this
understanding, an accurate depiction of the ocean
environment is necessary. How acoustic waves propagate
from one location to another under water is determined by
many factors, some of which are described by the sound
speed profile (SSP). If the environmental properties of
temperature and salinity are known over the entire depth
range, the SSP can be compiled by using them in an
empirical formula to calculate the expected sound speed in a
vertical column of water. One way to determine these
environmental properties is to measure them in situ, such as
by conductivity-temperature-depth or expendable
bathythermograph (XBT) casts. This method is not always
tactically feasible and only gives the vertical profile at one location producing a very limited picture of the regional
ocean structure. Another method is to estimate the ocean
conditions using numerical models. The valued-aided
ocean prediction models to ASW is assessed in this study.
Such quantitative analyses offer a means to optimize the
ASW requirements and technical capabilities of new weapon
systems. We use observed and modeled 3-D fields of
temperature, salinity, and sound speed. Compare model
profiles to observed profiles. Do ocean models predict the
vertical features of the observational data? Run
representative modeled and observed SSP profiles through
Navy’s acoustic models to see if there is an acoustic
difference in propagation and weapon preset.
Type
Conference Proceedings
Description
OCEANS2005, MTS/IEEE Conference Proceedings, DVD-ROM
Series/Report No
Department
Department of Oceanography
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Citation
Chu, P.C., G. Amezaga, E.L. Gottshall, and D. S. Cwalina, 2005: Assessment of ocean prediction model for Naval Operations using acoustic preset. OCEANS2005, MTS/IEEE Conference Proceedings, DVD-ROM, 10 pages
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This 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.