Acoustic Seaglider Planning For The Philippine Sea Experiment 2010 2011
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Total Pages | : 2 |
Release | : 2011 |
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This grant covered costs associated with planning for the use of Seagliders in PhilSea10, including travel to meetings in Seattle at the Applied Physics Laboratory, in San Diego at the Scripps Institution of Oceanography, and Taipei. This planning work led to subsequent grants to cover Seaglider acquisitions (N00014-09-1-0892) and experiment execution and data analysis (N00014-10-1-0334). There are currently four Seagliders operating in PhilSea10, to be recovered in March-April 2011.
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Total Pages | : 4 |
Release | : 2008 |
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We want to integrate acoustics across naval and oceanographic applications. On one hand active and passive acoustics are used to detect submarines. On the other hand, acoustics are used to measure and better understand the ocean environment of the detection problem. Acoustics are essential to the underwater "infrastructure" tasks of navigation, communications, and time transfer. In all cases, the detailed understanding of acoustic propagation, ocean variability, temporal and spatial coherence ambient sound and the assimilation of data in models is essential for improved systems performance and the quantification of the associated uncertainty. Within the context of the Quantifying, Predicting, and Exploiting (QPE) Uncertainty DRI activity in the Philippine Sea, Seagliders can serve as a multipurpose platform for acoustics to support research in acoustic propagation, tomography, ambient sound, navigation, and communications. Assimilating data into models will improve oceanographic and acoustic predictions; this will test many elements of the integrated end-to-end data-modeling-prediction-detection system.
Author | : Ralph A. Stephen |
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Total Pages | : 183 |
Release | : 2011 |
Genre | : Ambient sounds |
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The Ocean Bottom Seismometer Augmentation to the Philippine Sea Experiment (OBSAPS, April-May, 2011, R/V Revelle) addresses the coherence and depth dependence of deep-water ambient noise and signals. During the 2004 NPAL Experiment in the North Pacific Ocean, in addition to predicted ocean acoustic arrivals and deep shadow zone arrivals, we observed "deep seafloor arrivals" that were dominant on the seafloor Ocean Bottom Seismometer (OBS) (at about 5000m depth) but were absent or very weak on the Distributed Vertical Line Array (DVLA) (above 4250m depth). These "deep seafloor arrivals" (DSFA) are a new class of arrivals in ocean acoustics possibly associated with seafloor interface waves. The OBSAPS cruise had three major research goals: a) identification and analysis of DSFAs occurring at short (1/2CZ) ranges in the 50 to 400Hz band, b) analysis of deep sea ambient noise in the band 0.03 to 80Hz, and c) analysis of the frequency dependence of BR and SRBR paths as a function of frequency. On OBSAPS we deployed a fifteen element VLA from 12 to 852m above the seafloor, four short-period OBSs and two long-period OBSs and carried out an 11.5day transmission program using a J15-3 acoustic source.
Author | : Antao Chen |
Publisher | : CRC Press |
Total Pages | : 555 |
Release | : 2016-04-19 |
Genre | : Science |
ISBN | : 1439825076 |
"provides the full, exciting story of optical modulators. a comprehensive review, from the fundamental science to the material and processing technology to the optimized device design to the multitude of applications for which broadband optical modulators bring great value. Especially valuable in my view is that the authors are internationally
Author | : William Allan Perrie |
Publisher | : WIT Press |
Total Pages | : 241 |
Release | : 2002 |
Genre | : Science |
ISBN | : 1853129291 |
The increase in levels of population and human development in coastal areas has led to a greater importance of understanding atmosphere-ocean interactions. This second volume on atmosphere-ocean interactions aims to present several of the key mechanisms that are important for the development of marine storms.
Author | : Jeffrey Simmen |
Publisher | : American Inst. of Physics |
Total Pages | : 0 |
Release | : 2010-10-04 |
Genre | : Science |
ISBN | : 9780735408227 |
Undersea acoustic applications in shallow water, to detect, communicate, navigate, monitor and measure, are dependent upon a good physical understanding of sound propagation and scattering in this highly dynamic and inhomogeneous waveguide. Achieving such an understanding requires an interdisciplinary approach encompassing acoustics, physical oceanography, marine geophysics, marine biology, ocean engineering, and signal processing, as well as the underlying physics and mathematics of the integrated theory.
Author | : John Costello |
Publisher | : Createspace Independent Publishing Platform |
Total Pages | : 84 |
Release | : 2018-10-11 |
Genre | : |
ISBN | : 9781727834604 |
In late 2015, the People's Liberation Army (PLA) initiated reforms that have brought dramatic changes to its structure, model of warfighting, and organizational culture, including the creation of a Strategic Support Force (SSF) that centralizes most PLA space, cyber, electronic, and psychological warfare capabilities. The reforms come at an inflection point as the PLA seeks to pivot from land-based territorial defense to extended power projection to protect Chinese interests in the "strategic frontiers" of space, cyberspace, and the far seas. Understanding the new strategic roles of the SSF is essential to understanding how the PLA plans to fight and win informationized wars and how it will conduct information operations.
Author | : Klaus Wyrtki |
Publisher | : |
Total Pages | : 204 |
Release | : 1961 |
Genre | : China Sea |
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Author | : Gwyn Griffiths |
Publisher | : CRC Press |
Total Pages | : 369 |
Release | : 2002-11-28 |
Genre | : Technology & Engineering |
ISBN | : 0203522303 |
The oceans are a hostile environment, and gathering information on deep-sea life and the seabed is incredibly difficult. Autonomous underwater vehicles are robot submarines that are revolutionizing the way in which researchers and industry obtain data. Advances in technology have resulted in capable vehicles that have made new discoveries on how th
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Total Pages | : 20 |
Release | : 2010 |
Genre | : Medicine, Military |
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