July 1970 | Technical Memorandum ERL TM ITS 241
Ketchikan 2182 kHz communication
Cite This Publication
Jean E. Adams, “Ketchikan 2182 kHz communication,” Technical Memorandum ERL TM ITS 241, U.S. Department of Commerce, Environmental Science Services Administration, Institute for Telecommunication Sciences and Aeronomy, July 1970.
Jean E. Adams
Abstract: The present 2182 kHz communication between Ketchikan, Alaska, and ships or boats within 300 nautical miles of Ketchikan Coast Guard Station is poor. Calculations have been made of predicted sky-wave mode performance for representative circuits with sunspot numbers of 10 and 110, for winter and summer months. Cursory calculations of the ground wave and the diffracted path modes have also been performed. A horizontal half-wave dipole antenna is recommended for installation at Ketchikan Coast Guard Station to increase circuit reliabilities for the sky-wave propagation mode.
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