MEASUREMENTS OF VHF/UHF RADIO PROPAGATION IN A MARITIME TEMPERATURE CLIMATE

Authors
  1. Whitteker, J.H.
Corporate Authors
Communications Research Centre, Ottawa ONT (CAN)
Abstract
The signal strength from five television transmitters was monitored for two years at a site near Yarmouth, Nova Scotia. The path lengths ranged from 92 to 384 km, and the frequencies from 67 to 543 MHz. Two of the paths were overland, one path (with two transmitters) was mixed, and one path was over sea. The long-term median signal levels can be approximated by standard path-loss predictions if foilage attenuation is taken into account. The long-term statistical distribution of signal levels is in accord with the curves of NBS Technical Note 101, except that oversea UHF received power levels exceeded 10% of the time were found to be 10 to 20 dB higher than in the curves. The range of the seasonal variation of the monthly median signal level was found to be 5 to 16 dB, with the greatest variation on the long oversea path. TRUNCATED
Report Number
1380 —
Date of publication
15 Mar 1985
Number of Pages
44
DSTKIM No
85-02239
CANDIS No
47041
Format(s):
Hardcopy;Originator's fiche received by DSIS

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