March 1975 radio propagation predictions for U.S. Information Agency, Voice of America broadcast coverage, Vo1s. I and II,

Margo Leftin

Abstract: VOLUME I: HF radio propagation predictions are calculated for Voice of America circuits using the OT/ITS prediction program. Some of the parameters given are maximum usable frequency, the optimum traffic frequency, the lowest useful frequency, available signal-to-noise ratio, and circuit reliability. VOLUME II: HF radio propagation predictions are calculated for 35 circuits from the Voice of America transmitting facil­ity at Tinang, P.r., .30 circuits from their facility at Kavala, Greece~ 12. circuits from their transmitting facility at Greenville, N.C., and 21 circuits from their transmittinq facility at Wooferton, England, using the OT/ITS prediction­program. The program selects the optimum antenna at the facility for each circuit and the antenna identification and gain are listed in the predictiotis.

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