September 1974 | NTIA Technical Memo OT TM 74 159

September 1974 radio propagation predictions for United States Information Agency Voice of America broadcast coverage, Volume I

Margo Leftin

Abstract: HF radio propagation predictions are calculated for Voice of America circuits using the OT/ITS prediction program. Some of the parameter s given are maximum usable frequency (MUF), the optimum traffic fre­quency (FOT), the lowest useful frequency (LUF), available signal-to-­noise ratio (S/N), and circuit reliability.

Disclaimer: Certain commercial equipment, components, and software may be identified in this report to specify adequately the technical aspects of the reported results. In no case does such identification imply recommendation or endorsement by the National Telecommunications and Information Administration, nor does it imply that the equipment or software identified is necessarily the best available for the particular application or uses.

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