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Oceanic Engineering, IEEE Journal of

Issue 2 • Date April 1986

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Displaying Results 1 - 25 of 32
  • [Front cover and table of contents]

    Publication Year: 1986 , Page(s): 0
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    Freely Available from IEEE
  • Guest editorial

    Publication Year: 1986 , Page(s): 145 - 146
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    Freely Available from IEEE
  • Panel discussion summary [HF radar technology for ocean-surface remote sensing and surveillance]

    Publication Year: 1986 , Page(s): 147 - 149
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (388 KB)  

    Following the presentation of papers at the IEEE/URSI Special Session on HF Radar at Vancouver, B.C., Canada, an afternoon was devoted to discussion of the status of HF radar technology for ocean-surface remote sensing and surveillance. Participants included previous speakers and authors, as well as members of the audience. The status summary can be grouped into two categories: the capabilities of... View full abstract»

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  • Offshore structural engineering

    Publication Year: 1986 , Page(s): 340 - 341
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (241 KB)  

    First Page of the Article
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  • Applied oceanography

    Publication Year: 1986 , Page(s): 341
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  • [Back cover]

    Publication Year: 1986 , Page(s): c4
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    Freely Available from IEEE
  • On the application of HF ocean radar to the observation of temporal and spatial changes in wind direction

    Publication Year: 1986 , Page(s): 210 - 218
    Cited by:  Papers (14)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (728 KB)  

    The application of a 30-MHz narrow-beam ground-wave ocean radar to the observation of wind directions is described. It is found that the \cos^{s} (\theta/2) model for wind-wave directions does not apply in a specific case of shallow water where swell waves are behaving nonlinearly. To experimentally extract unambiguous wind directions from this model requires... View full abstract»

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  • Four-element CODAR beam forming

    Publication Year: 1986 , Page(s): 296 - 303
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (672 KB)  

    An HF radar called the Coastal Ocean Dynamics Applications Radar (CODAR) is presently being used in several forms to measure ocean surface parameters. The original version was developed by the National Oceanic and Atmospheric Administration (NOAA) and utilizes a four-element receive array. The array consists of four equally spaced elements arranged on a circle with a radius of 0.2151 wavelengths (... View full abstract»

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  • High-resolution electromagnetic altimetry over the ocean

    Publication Year: 1986 , Page(s): 327 - 332
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (544 KB)  

    A pair of coils acting as transmitter and receiver of a harmonic electromagnetic (EM) wave is found to be an excellent high-resolution altimeter at low altitudes over ocean regions. Due to high seawater conductivity, the altimetric determination from a received signal is computationally simple. Experimental results obtained from the Cape Cod Bay area indicate that an EM altimeter may be superior i... View full abstract»

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  • Multifrequency HF radar observations of currents and current shears

    Publication Year: 1986 , Page(s): 258 - 269
    Cited by:  Papers (9)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1656 KB)  

    Techniques have been developed for using high-frequency (HF) surface-wave radar to measure ocean currents and vertical current shears in the upper 1 or 2 m of the ocean surface. An HF radar can precisely measure the phase velocity and direction of propagation of ocean waves whose wavelength is one.half the radar wavelength. In the absence of a current, the speed of the waves is given by the still-... View full abstract»

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  • HF radar measurements of ocean wave parameters during NURWEC

    Publication Year: 1986 , Page(s): 219 - 234
    Cited by:  Papers (9)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1120 KB)  

    The Netherlands/U.K. Radar, Wavebuoy Experimental Comparison (NURWEC) was a collaborative experiment between the University of Birmingham, the Dutch Rijkswaterstaat (RWS), and the Institute of Oceanographic Sciences (IOS), and was designed to assess the availability and accuracy of ocean wave data using the University of Birmingham (BU) ground-wave radar. The experiment lasted for two months durin... View full abstract»

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  • Ship detection with high-resolution HF skywave radar

    Publication Year: 1986 , Page(s): 196 - 209
    Cited by:  Papers (39)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (1568 KB)  

    This paper presents an overview of ship detection by high-frequency (HF) skywave backscatter over-the-horizon radar (OTHR). Ships have been detected at ranges of 2000 km or more by OTHR that uses sufficient resolution in the radar spatial and Doppler frequency domains. The HF sea-echo Doppler spectrum limits the target signal-to-clutter ratio (SCR), as a function of the ocean wave-height distribut... View full abstract»

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  • Is it valid to use the linear gravity-wave dispersion relation when interpreting HF radar measurements?

    Publication Year: 1986 , Page(s): 285
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (136 KB)  

    Wave-tank measurements show that some wind waves travel at a speed that corresponds more closely to the spectral peak frequency than to the linear dispersion relation. However, Bragg echoes sampled and averaged in space and time by HF radars tend to obey the linear dispersion relation. Resolution of the dilemma will require new measurements with incisive attention to their meaning. View full abstract»

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  • Detection of meteorological fronts over the North Sea with Valensole skywave radar

    Publication Year: 1986 , Page(s): 174 - 179
    Cited by:  Papers (6)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (504 KB)  

    The skywave radar located at Valeusole is described. The front localization method is reviewed and discussed. Wind direction was mapped over the North Sea during a three-day experiment. Thirty maps were collected and two cold fronts were successfully detected and tracked. Data corresponding to one front are presented, discussed, and compared to French Meteorological Office (FMO) surface charts. Th... View full abstract»

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  • Correcting for distorted antenna patterns in CODAR ocean surface measurements

    Publication Year: 1986 , Page(s): 304 - 309
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (648 KB)  

    CODAR systems employ compact antenna elements such as electrically small loops and monopoles to extract bearing information in ocean surface observations. Past analysis methods have assumed that these element patterns are perfect, i.e., cosine and omnidirectional. Operations from metallic offshore platforms usually distort these patterns because of unavoidable objects in their near field. When suc... View full abstract»

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  • An experimental investigation of skywave sea-state radar techniques at a latitude near the Auroral Zone

    Publication Year: 1986 , Page(s): 187 - 195
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (720 KB)  

    In 1980 the Communications Research Centre (CRC) undertook a limited experimental program to investigate the feasibility of measuring sea-state characteristics off the east coast of Canada by means of high-frequency skywave radar. The propagation path, from the radar receiver at Ottawa, Ontario, to the observation area east of Newfoundland and Labrador, was tangent to the auroral zone, at times wi... View full abstract»

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  • Remote sensing with the JINDALEE skywave radar

    Publication Year: 1986 , Page(s): 158 - 163
    Cited by:  Papers (16)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (736 KB)  

    The JINDALEE skywave radar is being developed primarily for defense surveillance of Australia's Exclusive Economic Zone (EEZ), but its remote-sensing potential has long been recognized. Studies which commenced in 1974 led to successful measurements of sea-state and inferred surface wind fields in 1977-78 using a prototype radar; the current radar has been observing the Eastern Indian Ocean region ... View full abstract»

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  • The second-order shallow-water hydrodynamic coupling coefficient in interpretation of HF radar sea echo

    Publication Year: 1986 , Page(s): 310 - 315
    Cited by:  Papers (9)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (536 KB)  

    Extraction of wave.height directional spectral information from high-frequency (HF) radar sea echo requires the use of hydrodynamic and electromagnetic second-order coupling coefficients obtained from a perturbational expansion of the nonlinear boundary conditions at the ocean surface. To present, the hydrodynamic coupling coefficient derived for deep water has been given. Since most coastal HF ra... View full abstract»

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  • Tidal and storm-surge measurements with single-site CODAR

    Publication Year: 1986 , Page(s): 241 - 245
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (456 KB)  

    In this paper we describe the results of a detailed analysis of CODAR measurements made from a single site during the Atlantic Remote Sensing Land Ocean Experiment (ARSLOE). The passage of a storm front generated a surge followed by wind and current reversal, superimposed on the normal semi-diurnal tides. These data have been used previously to illustrate methods for the extraction of surface-curr... View full abstract»

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  • An evaluation of least-squares and closed-form dual-angle methods for CODAR surface-current applications

    Publication Year: 1986 , Page(s): 322 - 326
    Cited by:  Papers (6)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (600 KB)  

    Extraction of surface currents from first-order CODAR sea echo requires use of a model that allows signals from two bearings to contribute to the Doppler spectrum at a given frequency. This is called the dual-angle situation, and it applies over much of the coverage area. Two dual-angle techniques have appeared in the literature: a least-squares algorithm used with a crossed-loop antenna system, a... View full abstract»

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  • Rijkswaterstaat's interest in HF radar

    Publication Year: 1986 , Page(s): 235 - 240
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (624 KB)  

    In this paper an explanation is given of Rijkswaterstaat's need for hydrological and meteorological information. The present means to gather this information are described together with their limitations. Future developments in the field of HF narrow-beam groundwave radar systems are indicated and some recommendations are given for the design of an operational HF radar system for Rijkswaterstaat (... View full abstract»

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  • An analytical model for the HF backscattered Doppler spectrum for the ocean surface

    Publication Year: 1986 , Page(s): 293 - 295
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (272 KB)  

    An analysis previously developed for rough surface scattering with narrow-beam reception is extended to wide-beam or omnidirectional reception. The source is considered to be a pulsed electric dipole. The analysis includes multipathing effects on the received signal. The results are used to develop a model for the backscattered radar cross section of the ocean surface, up to a second-order approxi... View full abstract»

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  • Two tests of real-time ocean wave-height mapping with HF skywave radar

    Publication Year: 1986 , Page(s): 180 - 186
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (800 KB)  

    An estimate of the coverage efficiency of a high-frequency (HF) skywave (ionospheric) radar for mapping ocean wave height and surface wind direction at ranges between 1000 and 3000 km was made for two different but common operational ocean-monitoring applications. In the first test, three days in duration, wind direction and wave height were mapped over the entire coverage area. In the second test... View full abstract»

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  • The role of the gravity-wave dispersion relation in HF radar measurements of the sea surface

    Publication Year: 1986 , Page(s): 286 - 292
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (816 KB)  

    Recent experimental and theoretical findings raise interesting questions about the applicability of the normal gravity-wave dispersion relation at wave frequencies that exceed the spectral peak frequency. The use of the dispersion relation in analysis of HF radar Doppler sea echo is examined in this paper. Drawing on the results of perturbation theory for wave-wave nonlinear interactions, we show ... View full abstract»

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  • A review of methods of remote sensing of sea-surface conditions by HF radar and design considerations for narrow-beam systems

    Publication Year: 1986 , Page(s): 150 - 157
    Cited by:  Papers (6)
    Save to Project icon | Request Permissions | Click to expandAbstract | PDF file iconPDF (840 KB)  

    Present achievements in HF ground-wave radar remote mapping of surface currents and wave characteristics are reviewed, and the features of the different systems that are in use are described. Particular emphasis is given to the problems remaining to ensure effective mapping of nondirectional wave parameters and wave directional spectra over a sector of sea extending up to a range of 150-200 km fro... View full abstract»

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Aims & Scope

The IEEE Journal of Oceanic Engineering (ISSN 0364-9059) is published quarterly by 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.

Full Aims & Scope

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