AN INVESTIGATION OF THE APPLICABILITY OF ANALYTICALLY MANAGEABLE RAINDROP SIZE DISTRIBUTIONS TO RADAR OBSERVATIONS OF SUBTROPICAL PRECIPITATION.
TEXAS A AND M UNIV COLLEGE STATION DEPT OF OCEANOGRAPHY AND METEOROLOGY
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The feasibility of representing drop-size distributions of subtropical precipitation by exponentially-damped functions is investigated. Distribution functions are proposed which are found to reproduce the actual dropsize distributions investigated better than the MarshallPalmer distribution. The proposed drop-size distribution functions are applied to the equations for a dual-frequency radar system. It is shown that it is possible to describe completely the drop-size distribution in a precipitation volume by use of graphical relations derived in the investigation coupled with power measurements in a dual-frequency system which exploits the greater attenuation at 3.2-cm over that at 10.3-cm wave lengths. The development presumes that the drop-size distribution in the radar echo volume can be represented adequately by one of the functions investigated.