Title :
Modified gamma model for Singapore rain drop size distribution
Author :
Ong, J.T. ; Shan, Y.Y.
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Inst., Singapore
Abstract :
A modified gamma model is used to describe the rain drop size distribution in Singapore (1°21´N, 103°41´). The general expression of the moment estimates for the model is derived first. Since Joss type Distrometer RD69 is used in the measurement, the special equations for such data are then derived. The parameters for the modified gamma model are calculated for ten rainfall rates ranging from 1 mm/hr to 140 mm/hr. Using the least square fitting method, the general model suitable for all rainfall rates is obtained. The theoretical model is compared with the measured data. It shows that the derived model can be used to represent the Singapore rain drop size distribution
Keywords :
rain; Joss type Distrometer RD69; Singapore; atmosphere; meteorology; modified gamma model; rain; rain drop; raindrop; rainfall rate; size distribution; theoretical model; Communication systems; Degradation; Differential equations; Electronic mail; Genetic expression; Least squares methods; Microwave communication; Microwave frequencies; Rain; Size measurement;
Conference_Titel :
Geoscience and Remote Sensing, 1997. IGARSS '97. Remote Sensing - A Scientific Vision for Sustainable Development., 1997 IEEE International
Print_ISBN :
0-7803-3836-7
DOI :
10.1109/IGARSS.1997.609059
