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This report describes curves of transmission loss vs distance and antenna height derived from an analysis of approximately 159,000 hourly median field-strength observations between 90 and 110 mc. These observations extend over a period of several years and are distributed geographically over the whole United States. The curves contained in this report are believed to be more precise for engineering use than the FCC Ad Hoc Committee curves published in 1949.
Date of Publication: April 1955