Search for: [Description = "This paper covers unavailability of terrestrial and satellite line\-of\-sight radio links due to rain. To evaluate the rain effects over communication system, it is essential to know the temporal and spatial evolution of rainfall rate. Longterm 1\-min average rain\-rate characteristics necessary for the design of microwave radio links are determined for central Poland. 1\-min rain rate distributions are presented. It also describes comparison results of predicted attenuation obtained from ITU\-R formula and empirical data at frequency bands 11 GHz and 18 GHz and satellite 12 GHz. The National Institute of Telecommunications stores 11\-year long rain intensity characteristics \(1985–1996\), based on data derived on 15.4 km long experimental path. In this paper chosen experimental data are presented."]

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