Radio Noise Surveys at Canadian HF Communication Sites

Measurements of the radio noise environment at high frequencies (HF) using the Fa and Vd noise parameters have been made during 1973 and 1974 at several radio receiving sites in Eastern Canada. From the results of these measurements, two criteria have been developed to rate the sites quantitatively as to degree of degradation by manmade radio noise. The results also indicate that the CCIR atmospheric noise predictions are generally valid for this part of Eastern Canada.