Illuminating the Hidden Planet The Future of Seafloor Observatory Science (2000) / Chapter Skim
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Seafloor Observatory Architechture: Technical Requirements
Seafloor Observatory Architechture: Technical Requirements
Pages 71-78
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From page 71... ...
The following sections outline the characteristics of moored-buoy and cabled observatories, and discuss their current level of technological development. Individual nodes established for various scientific purposes will differ in size, complexity, scientific instrumentation, and technical capabilities in order to balance overall network objectives and cost.
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From page 72... ...
. Data transfer rate, power consumption, and system stabilization requirements are all interlinked, but it is possible to obtain high data-transfer rates at a relatively modest cost provided compromises are made in power and buoy stability.
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From page 73... ...
Deployment location will greatly impact mooring design due to variations in sea state, wind velocity, ocean and air temperature, water depth, and satellite communications coverage. Furthermore, consideration must also be given to other factors, such as the suitability of solar panels in high latitudes, potential for vandalism, and visibility of the mooring in shipping lanes.
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From page 74... ...
CURRENTLY AVAILABLE TECHNOLOGY Small Moorings The oceanographic community has extensive experience with simple moored-buoy systems deployed to acquire long-duration meteorological and oceanographic data (for example, the Woods Hole Oceanographic Institution [WHOI] alone has deployed on the order of 1,000 such systems)
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From page 75... ...
To efficiently incorporate technological developments into moored-buoy systems before deployment in remote locations, an easily accessible testing node will be beneficial. There are several significant development questions that must be addressed before moored-buoy systems can be routinely used as seafloor observatories: · What are the optimal designs of moored-buoy systems spar or disk, or some hybrid, such as a spar with a single, S-tether mooring?
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From page 76... ...
The high performance satellite terminal provides 1 Mb/s throughput and the tuned buoy design allows operation in sea state 6 conditions with a seven-month fuel supply. OceanNet buoys can be deployed in water depths > 3,000 m and can provide global forwarding of data from ocean sensors, custom subsea component interfaces, mission planning and deployment assistance, real-time data collection, autonomous operation, and remote and autonomous command and control.
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From page 77... ...
The major components of a cabled observatory will be · shore stations containing high-power and -voltage, direct-current (DC) generation, network management, and science-experiment management equipment; · undersea cables containing optical fibers and a power conductor that interconnect shore stations and undersea nodes; · undersea observatory nodes containing power conditioning, network management, science-experiment management, and standardized .
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From page 78... ...
Although it is likely that UNOLS ship capabilities would be adequate for many maintenance tasks, the additional burden on the already stressed ROV fleet will need to be addressed. FUTURE DEVELOPMENTS NEEDED Physical Design/ of the Caroled O7oser7)
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