Inference of spatial correlation characteristics of rainfall intensity from the data of satellite-borne precipitation radar and ground-based rain gauges

Spatial correlation characteristics of rainfall are crucial in predicting rain attenuation statistics and various diversity characteristics for wireless communication links operating at frequencies above 10 GHz. In this paper, we propose a method for estimating the spatial correlation coefficient of rainfall intensity from the ground rainfall intensity data measured by a satellite-borne precipitation radar and a ground-based rain-gauge. By applying this method to the data measured by the Precipitation Radar of the Tropical Rainfall Measuring Mission satellite and those of ground-based rain-gauges provided by Japan Meteorological Agency, the estimated spatial correlation characteristics for Kanto region around Tokyo are found to be consistent with those reported in literatures. In addition, the result revealed that the spatial correlation characteristics showed regional dependence in central and western Japan. dependence.