Parameters of Rain Drop Size Distribution and Their Vertical Profile Depending on Rainfall Type

Vertical Profiles Of: Rain Drop Size Distribution & Radar Reflectivity Factor-rain Rate (z-r) Relation

A new parametrization of the rain drop size distribution

This paper revisits the problem of nding a parametric form for the rain drop size distribution (DSD) which 1) is an appropriate model for tropical rainfall, and 2) involves statistically independent parameters. Using TOGA/COARE data, we derive a parametrization which meets these criteria. This new parametrization is an improvement on the one that was derived in [3], using TRMM ground truth data...

A Maximum Entropy Modelling of the Rain Drop Size Distribution

This paper presents a maximum entropy approach to Rain Drop Size Distribution (RDSD) modelling. It is shown that this approach allows (1) to use a physically consistent rationale to select a particular probability density function (pdf) (2) to provide an alternative method for parameter estimation based on expectations of the population instead of sample moments and (3) to develop a progressive...

Examination of the – Relation Suggested for Drop Size Distribution Parameters

Raindrop size distributions are often assumed to follow a three-parameter gamma distribution. Since rain intensity retrieval from radar observations is an underdetermined problem, there is great interest in finding physical correlations between the parameters of the gamma distribution. One of the more common approaches is to measure naturally occurring drop size distributions (DSDs) using a dis...

On the Role of Drop Size Distribution in Trmm Rain Profiling Algorithm

The selection of the drop size distribution (DSD) model is one of the critical steps in rain profiling algorithm (RPA) of the NASA Tropical Rainfall Measuring Mission (TRMM) (Iguchi et al. 2000). RPA requires R-Ze and K-Ze relations for convective and stratiform precipitation, where K and Ze represent the attenuation and equivalent reflectivity at 13.8 GHz, respectively, and R is the rain rate....