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11- and 18-GHz radio wave attenuation due to precipitation on a slant path
Authors:Akeyama   A. Morita   K. Inoue   T. Sasaki   O. Kikushima   M.
Affiliation:Nippon Telegraph and Telephone Public Corp., Kanagawa-ken, Japan;
Abstract:Measurements of attenuation at 11 and 18 GHz from precipitation have been made on a slant path over a three-year period in the Tokyo area using a sun tracker and a radiometer. Simultaneous rain attenuation measurements of a 2.9-km terrestrial path at 19 GHz were used to clarify the correlation characteristics between the terrestrial and the slant paths. The following results are presented: frequency, seasonal, annual, and elevation angle dependence of rain attenuation, rain rate distribution, effective distance, correlation characteristics of attenuation between slant and terrestrial paths, attenuation due to snowfall, and site diversity effect for a separation of 14.3 km at 18 GHz.
Keywords:
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