Multiple convergence zone acoustic telemetry feasibility test report
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Multiple convergence zone acoustic telemetry feasibility test report

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Published by Woods Hole Oceanographic Institution in Woods Hole, Mass .
Written in English

Subjects:

  • Telemeter.,
  • Deep-sea moorings.

Book details:

About the Edition

This report describes a multiple CZ acoustic telemetry experiment conducted off the coast of California 1/28/90-2/2/90. The goal was to design a maximally robust high speed underwater modem suitable for data telemetry for submerged platforms and moorings. Six modulation methods were used to transmit data at rates from 1 to 1000 baud corresponding to bit rates up to 3kbit/sec. In addition, a large number of channel probe sequences was transmitted in order to estimate channel multipath, fluctuation dynamics and spatial diversity characteristics relevant to acoustic data telemetry. The data was transmitted from a 1 kHz source suspended from the R/V McGaw, and received on a multichannel vertical array tended by the RV Point Sur. The multichannel data was digitally recorded using floating-point digitizers and stored on optical disk for further processing. Approximate transmission ranges were 70, 140, 200 and 250km. Approximtely 8 hrs of transmission were recorded at each data range.

Edition Notes

Other titlesAcoustic telemetry feasibility report.
Statementby Josko A. Catipovic...[et al.]
SeriesWHOI -- 91-38., WHOI (Series) -- 91-38.
ContributionsCatipovic, Josko A., Woods Hole Oceanographic Institution.
The Physical Object
Pagination124 p. :
Number of Pages124
ID Numbers
Open LibraryOL15178741M

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Acoustic telemetry has gained widespread popularity as a tool to understand migration, habitat use and survival of aquatic animals (Cooke et al., ; Hussey et al., ). Acoustic telemetry func-tions similar to radiotelemetry in terrestrial environments (White & Garrott, ); an animal-borne transmitter emits an acoustic signalCited by: DOI: / Corpus ID: Adaptive multichannel combining and equalization for underwater acoustic communications @article{StojanovicAdaptiveMC, title={Adaptive multichannel combining and equalization for underwater acoustic communications}, author={M. Stojanovic and J. Catipovic and J. G. Proakis}, journal={Journal of the Acoustical Society of America}, year={ Acoustic telemetry is an important tool for monitoring the movements, distributions and behaviour of marine animals. Its application is moving away from exploratory research towards more applied research questions and the monitoring of impacts, such as offshore. Josko Catipovic's 54 research works with 2, citations and 1, reads, including: Acoustic communication with small UUVs using a hull-mounted conformal array.

Acoustic and radio telemetry have revealed new information on the behavior and migration of fish and invertebrate species, and telemetry is a powerful tool for stock identification. This report describes a multiple CZ acoustic telemetry experiment conducted off the coast of California 1/28//2/ The goal was to design a maximally robust high speed underwater modem. Acoustic telemetry is just one technology now in the toolbox of marine scientists that study animal behavior. FACT members also commonly employ other technologies including a variety of satellite transmitters, Unmanned Underwater Vehicles (UUVs), Unmanned Surface vehicles (USVs), and inertial measurement units (IMUs) to reveal the movement and survival of sea turtles and marine fishes. Post-CVA, choking while eating, obtain order for swallowing study Diabetes, including indications of hypoglycemia: cool, clammy skin DVT prevention, early ambulation and SCDs Hypertension Hypoglycemia Myocardial infarction (MI): bilateral rates post-MI, early indication left-sided heart failure.

The Heard Island Feasibility Test (HIFT) demonstrated that coded acoustic signals could be detected at ranges up to 18, km with currently available source technology. Multiple convergence. at depth, to form what is known as a convergence zone, at a horizontal range of order tens of nautical miles. The acoustic energy is often focussed at the convergence zone. If the acoustic transmission loss is examined against horizontal range, the convergence zone will appear as a peak of energy frequently 20 dB above surrounding energy levels. The technical reports prepared by the Woods Hole Oceanographic Institution in are listed in this bibliography. Inquiries about availability of extra copies win be handled on an individual basis. An underwater acoustic communications system utilizes phase coherent modulation and demodulation in which high data rates are achieved through the use of rapid Doppler removal, a specialized sample timing control technique and decision feedback equalization including feedforward and feedback equalizers. The combined use of these techniques drammatically increases data rates by one and.