January 1971 | NTIA Technical Memo OT ITS TM 15

Optimum HF frequencies for U. S. Coast Guard ice broadcasts on CW and FAX for 1971

Jean E. Adams; Dale N. Hatfield

Abstract: A computer based simulation model (Hatfield and Adams, 1970) was used to analyze the coverage obtained in the Command and Control and Arctic areas when transmitting CW and FAX from the U. S. Coast Guard's Otis AFB, Cape Cod, Massachusetts facility. The objective was to choose two HF frequencies which would provide nearly the same reliability and coverage as had been attained previously using three HF frequencies. The frequency combination 8502 and 12750 kHz provides be st system operation. Elimination of the third frequency reduces the predicted system reliability by 2 or 3 percent.

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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