AN EXACT ANALYTICAL SOLUTION FOR RAINDROP COLLISION RATE

An exact solution was found for the rate of collisions between raindro ps by integrating over a finite drop size range. Collision rates compu ted from this solution were compared to those computed from a solution obtained by integrating over an infinite drop size range. The compari son revealed that, for a given reflectivity factor and intercept, the solution for finite size spectrum width results in collision rates tha t are higher than those obtained for an infinite drop size range. This work underscores the importance of knowing the size spectrum width in determining raindrop collision rate.