Rain Attenuation Statistics for Terrestrial Microwave Links in Canada

摘要

A broad, comprehensive set of attenuation predictions are presented for terrestrial microwave system planning. Detailed aspects of rain structure which affect the calculation of attenuation from a knowledge of the instantaneous precipitation intensities are discussed. The basis of the synthetic storm procedure which is used to compute the rain attenuation for terrestrial links is outlined. The range of microwave hop parameters for which attenuation prediction data are presented is described, and a number of current schemes for frequency extrapolation is examined. A selection of contour maps giving the attenuation levels and maximum permissible hop lengths on a geographic basis are also presented. The polarization characteristics of rain attenuation are considered. Finally, the predicted attenuation distributions for the individual locations are presented.