High-Frequency Techniques and Over-the-Horizon Radar in Coastal Research.

摘要

In order to telemeter environmental data from remote shelf waters inexpensively, radio transmitters in the 2- to 6-megahertz (MHz) band are attached to freely drifting drogues. Bearing angles to the drogues are obtained at shore bases by using directional antennas to receive the ground wave transmissions from the drogues. Drogues have been tracked using this system in a variety of coastal situations. Mass fluxes determined by this method would have been prohibitively expensive to delineate with current meters. The system has also been used to telemeter sea surface temperature to nearby shore stations as well as over extended distances. (Author)