Recent developments in ocean data telemetry at Woods Hole Oceanographic Institution

Frye, Daniel E.; Owens, W. Brechner

doi:10.1109/48.90898

Cited by 12 publications

(9 citation statements)

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“…ADCMs produce prodigious amounts of data in comparison to traditional oceanographic instrumentation like the meteorological sensors and single point current meters discussed by Frye and Owens (1991). During a deployment where a high degree of temporal and spatial resolution is required, the ADCM may generate as much as 1…”

Section: Tils Report Describes the Development Of A Data Processing Mmentioning

confidence: 99%

“…The desirability of data telemetry from remote, unmanned sites such as deep ocean buoys has been recognized for some time, and several programs at the Woods Hole Oceanographic Institution (Frye and Owens, 1991) and elsewhere have helped to develop this capabilty. Much of the work to date has concentrated on the telemetry of a limited set of data or status parameters, with little or no data processing or compression.…”

Section: Background and Motivationmentioning

confidence: 99%

“…An initial effort to obtain real-time data from an ADCM via satellte was guided by McPhaden at the Pacific Marine Environmental Laboratory (McPhaden et al, 1990;1991). The result was the PROTEUS mooring, consisting of a downward-looking ADCM mounted in the bridle of a surface buoy, and connected to a processor which transmitted averaged velocity profiles at 24 hr intervals.…”

Section: Tils Report Describes the Development Of A Data Processing Mmentioning

confidence: 99%

“…Much of the work to date has concentrated on the telemetry of a limited set of data or status parameters, with little or no data processing or compression. Although more sophisticated systems are being developed (Frye and Owens, 1991;Irish et al, 1991), in some cases the telemetered information from a complex sensor is only suffcient to provide an indication of instrument status. As instrumentation becomes more complex, and…”

Section: Background and Motivationmentioning

confidence: 99%

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A Data processing module for acoustic doppler current meters

Plueddemann¹,

Olen²,

Singer³

et al. 1992

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Section: Tils Report Describes the Development Of A Data Processing Mmentioning

confidence: 99%

Section: Background and Motivationmentioning

confidence: 99%

Section: Tils Report Describes the Development Of A Data Processing Mmentioning

confidence: 99%

Section: Background and Motivationmentioning

confidence: 99%

See 2 more Smart Citations

A Data processing module for acoustic doppler current meters

Plueddemann¹,

Olen²,

Singer³

et al. 1992

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“…The second type of system in figure 1-1 is an increasingly popular configuration for deep water surface moorings for oceanographic applications [31]. Variations on this shape are also used to moor meteorological buoys [13].…”

Section: Introductionmentioning

confidence: 99%

The dynamics of geometrically compliant mooring systems

Gobat¹

2000

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Geometrically compliant mooring systems that change their shape to accommodate deformations are common in oceanographic and offshore energy production applications. Because of the inherent geometric nonlinearities, analyses of such systems typically require the use of a sophisticated numerical model. This thesis describes one such model and uses that model along with experimental results to develop simpler forms for understanding the dynamic response of geometrically compliant moorings.The numerical program combines the box method spatial discretization with the generalized-α method for temporal integration. Compared to other schemes commonly employed for the temporal integration of the cable dynamics equations, including box method, trapezoidal rule, backward differences, and Newmark's method, the generalized-α algorithm has the advantages of second-order accuracy, controllable numerical dissipation, and improved stability when applied to the nonlinear problem. The numerical program is validated using results from laboratory and field experiments.Field experiment and numerical results are used to develop a simple model for dynamic tension response to vertical motion in geometrically compliant moorings. As part of that development, the role of inertia, drag, and stiffness in the tension response are explored. For most moorings, the response is dominated by inertial and drag effects. The simple model uses just two terms to accurately capture these effects, including the coupling between inertia and drag. The separability of the responses to vertical and horizontal motions is demonstrated and a preliminary model for the response to horizontal motions is presented.The interaction of the mooring line with the sea floor in catenary moorings is considered. Using video and tension data from laboratory experiments, the tension shock condition at the touchdown point and its implications are observed for the first time. The lateral motion of line along the bottom associated with a shock during unloading may be a significant cause of chain wear in the touchdown region. Results from the laboratory experiments are also used to demonstrate the suitability of the elastic foundation approach to modeling sea floor interaction in numerical programs.

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