NDLI: Acoustic Propagation Uncertainty in the Shallow East China Sea

Content Provider	IEEE Xplore Digital Library
Author	Abbot, P. Dyer, I. Emerson, C.
Copyright Year	1976
Abstract	Acoustic transmission loss (TL) and supporting ocean environmental data collected during the Asian Seas International Acoustics Experiment (ASIAEX) on June 3, 2001, in the East China Sea (ECS), in a water depth of approximately 100 m are presented. Objectives of the data analysis are to explore the stochastic nature of TL in terms of the mean (mu _TL) and the fluctuations around the mean (as described by the standard deviation (sigma_TL) and higher order statistics). In particular, we conjecture that mu_TL robustly reflects the macrostate of the ocean, including the bottom, whereas uncertainties in TL as measured by sigma_TL are related to the microstate of the ocean, again including the bottom. Comparisons are made to TL data at a similar location, 200 km from the ASIAEX site, in waters of the same depth, by the Harsh Environment Program in September 1997. The TL is shown to be approximately horizontally isotropic with exception to a discrete anisotropic feature likely caused by internal waves. Various mechanisms of uncertainty are discussed to describe the microstate. These were not sufficiently resolved to identify the primary cause of variability
Sponsorship	IEEE Oceanic Engineering Society
Starting Page	368
Ending Page	383
Page Count	16
File Size	2336604
File Format	PDF
ISSN	03649059
Volume Number	31
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-04-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Acoustic propagation Uncertainty Oceans Propagation losses Data analysis Stochastic processes Fluctuations Higher order statistics Robustness Sea measurements underwater acoustics Littoral environment transmission loss (TL) uncertainty underwater acoustic measurements underwater acoustic propagation
Content Type	Text
Resource Type	Article
Subject	Ocean Engineering Mechanical Engineering Electrical and Electronic Engineering

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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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