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IEEE Journal of Oceanic Engineering

Issue 3 • Date Jul 1991

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Displaying Results 1 - 6 of 6
  • Slope-induced nonlinearities on imaging of ocean waves

    Publication Year: 1991, Page(s):279 - 284
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (496 KB)

    The MTF (modulation transfer function) is the primary descriptor used to relate the variations of the electromagnetic backscatter from the ocean to the ocean wave parameters. The major assumption involved in the definition of the MTF is a linear relation between the backscattered power and the long-wave slope. An investigation of this assumption is presented showing that the backscattered power an... View full abstract»

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  • Space-time processing, environmental-acoustic effects

    Publication Year: 1991, Page(s):285 - 301
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1564 KB)

    The authors examine the subject of space-time processing and review fundamental environmental effects and their influence on arrays in the deep ocean sound channel. Space-time transforms are reviewed to demonstrate the analogy between spatial and temporal properties to stress the importance of convolution and matched field processing. A criterion is presented by which the resolution of such measur... View full abstract»

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  • Range and Doppler information from fourth-order spectra

    Publication Year: 1991, Page(s):233 - 243
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (672 KB)

    In an active sonar system setting, a novel method is evaluated that extracts range and Doppler information from a Doppler-spread active sonar echo. The Doppler spreading is based on H. Van Trees' (1971) Gaussian amplitude modulating model, and the new method is based on the Fourier transform of a special case of the fourth-order cumulant. Specifically, from the envelope of the Gaussian amplitude m... View full abstract»

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  • The Wavescan second generation directional wave buoy

    Publication Year: 1991, Page(s):254 - 266
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1028 KB)

    The authors describe Wavescan, a multipurpose data buoy specially designed for directional wave measurements and meteorological data collection. Their objective was to produce a second-generation high-capability metocean data buoy, with full in situ processing, real-time telemetry, and onshore result presentation. Emphasis is on the design of a buoy hull with the wave-following capability needed t... View full abstract»

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  • Receiver depth selection for passive sonar systems

    Publication Year: 1991, Page(s):267 - 278
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1140 KB)

    Since tactical acoustic systems such as towed arrays can be deployed at various depths, the authors address the question of what depth is optimal. This question is considered principally from the point of view of optimum propagation conditions, employing two deep-water scenarios representing summer and winter conditions in the western Mediterranean. Two simple rules-of-thumb are derived from these... View full abstract»

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  • A three-frequency scatterometer technique for the measurement of ocean wave spectra

    Publication Year: 1991, Page(s):244 - 253
    Cited by:  Papers (1)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (836 KB)

    A microwave technique for the measurement of ocean wave spectra has been compared with wave gauge output during extensive field testing. The method is based on the dual-frequency technique for detecting long ocean waves by matching the modulation of short waves with the beat wavelength between two transmitted microwave frequencies. The new method, however, utilizes three microwave frequencies in o... View full abstract»

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Aims & Scope

The IEEE Journal of Oceanic Engineering (ISSN 0364-9059) is the online-only quarterly publication of the IEEE Oceanic Engineering Society (IEEE OES). The scope of the Journal is the field of interest of the IEEE OES, which encompasses all aspects of science, engineering, and technology that address research, development, and operations pertaining to all bodies of water. This includes the creation of new capabilities and technologies from concept design through prototypes, testing, and operational systems to sense, explore, understand, develop, use, and responsibly manage natural resources.

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Meet Our Editors

Editor-in-Chief
N. Ross Chapman
School of Earth & Ocean Sciences
University of Victoria
3800 Finnerty Road
Victoria, BC V8P 5C2 Canada
chapman@uvic.ca