A methodology for quantitatively estimating the performance of millimeter-wave systems (30-300 GHz) in the atmosphere and in the presence of rainfall. Information on the transmission properties of millimeter waves is combined with currently available meteorological data to derive the methodology. The available propagation and rainfall data for a given climatic region are used to derive curves giving attenuation due to rainfall vs. path length for various frequencies. Emphasis is on high-reliability communications in which outages are 0.1 percent (530 min of outage per year) or less, but the methodology described applies to higher outage systems as well.
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