The Northwest Passage propagation experiment : report of the 1983-1984 measurement program / by R.S. Butler. : Co24-3/7-1391-1985E-PDF

"An experiment was undertaken in 1982 to study radio propagation conditions in the VHF and UHF bands in the Canadian Arctic Islands near latitude 75°N. There were five UHF paths having both ends elevated to study point-to-point relay links. At VHF there were nine paths from near sea level to sites at various elevations to study links from ship to shore. Path lengths were in the range 60 to 100 km and were representative of the paths needed for a maritime mobile communication system to cover the entire Northwest Passage. This report covers the measurements made between September 1983 and January 1985. Annual, seasonal, and worst-month statistics are presented and analyzed. It is concluded that reliable VHF communications can be provided to ships in the Northwest Passage using modest transmitter powers (less than 3 watts per 25 kHz voice channel), while very low transmitter powers (less than 0.1 watts per channel) would be adequate for UHF relay links between VHF sites"--Abstract, page 1.

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