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A prototype Lagrangian current buoy using the carrier plus sideband (CSB) retransmission of Omega navigation symbols
Baker, Donald L. Welch, Christian S.
Baker, Donald L.
Welch, Christian S.
Abstract
As part of the continental shelf investigations of the Virginia Institute of Marine Science (VIMS) , electronics were developed and tested to track an ocean-current-following (Lagrangian) buoy by the retransmission of Omega navigation signals to a shore station using medium frequency (2 . 398 MHz) ground wave propagation and equal-carrier-upper-sideband modulation . The buoy electronics include sharp clipping and filtering for noise reduction and Omega signal equalization . The carrier and upper sideband are transmitted with equal power to maintain the relative phases of separate Omega station signals on demodulation. The base station is a 2.4 MHz receiver/demodulator feeding a commercial Omega navigation receiver, with minicomputer processing for teletype printout and digital magnetic tape recording. Field trials of this navigation system were performed at VIMS in spring, 1975 .
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1976-07-01
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Research and Technical Reports, Oceanographic buoys, Ocean currents -- Measurement
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Virginia Institute of Marine Science