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The prediction of area coverage of a broadcast station is of prime importance. To do this requires the evaluation of the effects of such factors as wave refraction, earth reflection, diffraction, and attenuation. The following paper describes an experiment conducted at 850 mc which was undertaken to solve this problem. We have concluded that useful predictions of wave propagation can be made with free space theoretical field strength reduced by theoretical knife edge diffraction shadow loss and by suitable empirical experience factors.