To improve the current 2A12 rain retrieval algorithm (Kummerow et al. 2001) over land, it is important to evaluate the anomalies in the retrieved product. However, it is difficult to quantify these anomalies globally because there is no single rainfall product that can represent the ground truth. Products from rain gauges have reliable estimation of rainfall only over areas with dense rain gaug...

Since the TRMM launch in 1997, global rain estimation by microwave radiometer has been improved referring the PR data. The microwave radiometer observation becomes the major observation tool for the Global Precipitation Measurement (GPM). However, there are still gaps of global rainfall distribution between PR and TMI (e.g. Berg et al., 2002). One of the major issues for rain retrieval algorith...

Design by Transformation (DxT) is a top-down approach to mechanically derive high-performance algorithms for dense linear algebra. We use DxT to derive the implementation of a representative matrix operation, twosided Trmm. We start with a knowledge base of transformations that were encoded for a simpler set of operations, the level-3 BLAS, and add only a few transformations to accommodate the ...

A comparison of the TRMM satellite product and IMD rainfall gridded data is expressed by means indices for study drought variation in Tumakuru District Karnataka, India.

In order to secure the quality of precipitation estimates, ground validation (GV) of satellite data and retrieval algorithms is essential. Since end-to-end comparisons between instantaneous precipitation data observed by satellite and groundbased instruments is not enough to improve the algorithms. The error of various physical parameters in the precipitation retrieval algorithms (e.g. attenuat...

This study describes the daily lighting cycle and the annual thunderstorm distribution as observed by the Precipitation Radar (PR), the Visible and Infrared Scanner (VIRS) and the Lightning Imaging Sensor (LIS) on board the Tropical Rainfall Measuring Mission (TRMM) satellite over South America. Based on a TRMM measurements from 1998 through 2011, a database of individual thunderstorms have bee...

We develop an over-ocean rainfall retrieval algorithm for the Advanced Microwave Sounding Unit (AMSU) based on the Global Satellite Mapping of Precipitation (GSMaP) microwave radiometer algorithm. This algorithm combines an emissionbased estimate from brightness temperature (Tb) at 23 GHz and a scattering-based estimate from Tb at 89 GHz, depending on a scattering index (SI) computed from Tb at...

Prior research has shown that deforestation in the southwestern Amazon enhances the formation of nonprecipitating shallow cumulus clouds, while deep cumulus convection was favored over forested land. The research presented here further investigates the trends of hydrometeors in the area by examining how precipitation frequency changes as a function of distance to the forest’s edge. Measurements...