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    The design, construction and testing of Loran-C from a drifting buoy

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    WHOI-80-79.pdf (21.39Mb)
    Date
    1980-12
    Author
    Collins, Clayton W.  Concept link
    Walden, Robert G.  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/9608
    DOI
    10.1575/1912/9608
    Keyword
     Oceanographic buoys; Loran 
    Abstract
    A low-windage, current-following spar buoy system containing an automatic Loran-C navigation receiver and a single sideband transmitter with associated control circuitry is described. The Loran-C unit acquires and tracks Loran-C signals and, at intervals controlled by an onboard timer, produces a digital message which modulates the transmitter. The transmitter sends this message via a radio telemetry link to a base or ship receiving station where it is decoded. The decoder displays the message contents in the form of Loran-C time differences representing two lines of position, and thus a geographic fix. The system enables the position of the buoy to be tracked as it drifts with the current and thus serves as an instrument in measuring surface and near-surface current transport. A physical description, details of electrical and mechanical design, and test results, are documented in this report. Feasibility of the system was proven, and a pre-prototype system built and tested.
    Collections
    • Applied Ocean Physics and Engineering (AOP&E)
    • WHOI Technical Reports
    Suggested Citation
    Collins, C. W., & Walden, R. G. (1980). The design, construction and testing of Loran-C from a drifting buoy. Woods Hole Oceanographic Institution. https://doi.org/10.1575/1912/9608
     

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