Shadow-mapping to study attenuation by rain on satellite microwave links

The paper presents a high resolution numerical map of the microwave shadow that would be cast on the earth surface by a precipitation pattern (a thunderstorm complex at a height of 5 km is considered as an example) in the radiation from a transmitter on a geostationary satellite at azimuth 120 deg and elevation 18.43 deg. On the map each number represents an area 1 km x 1.5 km at a height of 5 km. Another figure is presented showing how the data from several shadow maps are combined. Maps, one every five minutes for two hours, which would tell the whole attenuation story of a storm passage for an area approximately 60 km x 40 km are also considered.