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  • 1
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    Woods Hole Oceanographic Institution
    Publication Date: 2022-05-26
    Description: An expendable, self-deploying mooring (XMOOR) for shallow water applications has been developed to address Navy requirements for environmental monitoring. The project has been conducted jointly between the Woods Hole Oceanographic Institution and the Naval Research Laboratory at Stennis, MS. WHOI has taken the lead on the mechanical design of the system while NR has developed the electronics. Eight prototype XMOOR systems have been built. They are designed for water depths between 10 and 100m, for deployments of up to 3-months duration, and for automatic deployment. Their sensor suite includes barometrc pressure, air temperatue, water temperature at up to 25 levels, and conductivity and pressure at up to 3 levels. Data telemetry is accomplished via the Argos DCS and by line-of-sight VH confguration of the data collection program. This report describes the XMOOR mechanical system. The data collection and telemetry systems are described separately in (1) and (2).
    Description: Funding was provided by the Office of Naval Research through Contract Nos. NOOO-14-92-C-6028 and NOOO-14-95-1-0774.
    Keywords: Expendable mooring ; Self-deploying mooring ; Inductive telemetry
    Repository Name: Woods Hole Open Access Server
    Type: Technical Report
    Format: 19233023 bytes
    Format: application/pdf
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  • 2
    Publication Date: 2022-05-26
    Description: The feasibility of using inductive coupling with existing submarine telephone cables for telemetry of data from ocean sensors was investigated. The submarine telephone cable was simulated with a computer model and the model results were tested experimentally by deploying 600 meters of coax cable in Woods Hole Harbor. In parallel a study of the optimum access methods and modulation and techniques was performed. Results of the feasibility study showed that a non-invasive technique for inductive coupling is not feasible for use with existing SF and SD coaxial cable designs. Signals induced in both conductors by a toroid encircling the cable remain identical as they propagate along the cable as a result of mutual inductance. Thus, no signals are apparent at the repeaters. Optimal use of cable bandwidth combines time division multiple access with trellis-coded QAM modulation.
    Description: Funding was provided by the IRIS Consortium under sub-award agreement No. 0169 and by the W.M. Keck Foundation through their Technology Innovation Awards.
    Keywords: Ocean data telemetry ; Undersea cables ; Inductive coupling
    Repository Name: Woods Hole Open Access Server
    Type: Technical Report
    Format: 1638542 bytes
    Format: application/pdf
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