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Abstract

Simultaneous field strength measurements of two distant Band I transmissions were carried out at two receiving sites within a few miles of each other. The sites were so chosen that while one was free of any immediate terrain obstruction, the other lay in the shadow of a range of hills. The measurements show that the ratio of the field strengths at the two receiving sites is approximately constant under varying propagation conditions, and that additional protection against co-channel interference is given to areas screened by hills. Such additional protection can be taken into account when planning a Band I television service to an area screened by hills.

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