Propagation Measurements for Over-Water Low-Angle and Over-Horizon Communications with Buoys
SANDERS ASSOCIATES INC NASHUA NH
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The report describes results of a program of measurement and analysis of RF signal propagation. The work supplements previous investigations related to over-water RF propagation. The purpose of this program was to provide improved predictions of propagation loss on over-water paths. Primary application was over-horizon propagation using surface-wave mode. Measurements were made to substantiate prediction procedures. Measurements were made using buoys instrumented to telemeter data to the receiving station. This data and sea state conditions were used in analysis of measurements. Computer prediction techniques were evaluated on basis of measurements. Received signal strengths were used to evaluate computer prediction methods. Signal variations were used to estimate compensating power margin for propagation calculations. Results were applied to design of a buoy transmitting over-horizon to distances of 200 nautical miles.
- Radio Communications