Disdrodata 2.2

The purpose of this software program is to enable users of an RD-80 or RD-69 disdrometer to record and evaluate drop size measurements with a personal computer or notebook based on Windows. This paper will briefly describe the theoretical background of drop size measurements with the disdrometer and it's implementation in the present program.

The disdrometer distinguishes 127 classes of drop diameter. To reduce the amount of data and to get statistically meaningfull samples, the 127 drop size channels of the RS-232 output are combined into 20 drop size classes distributed more or less exponentially over the available range of drop diameters by the DISDRODATA program. The number of drops in each drop size class is integrated over one minute to form an individual measurement. All the measurements are combined into a file. All data files are identified automatically by their starting time.