Validation and error characterization for the Global Precipitation Measurement

In this paper, we have dealt with the validation and error characterization for the Global Precipitation Measurement (GPM) research initiative. The GPM is a three-year on-orbit duration program with a five-year duration goal. The Core satellite launch is scheduled tentatively for Fall 2008. Presently, GPM is in formulation stage in which the team is developing concepts and requirements prior to design work. As a part of formulation, ground validation is developing its requirements with a top level schedule requirement of commencing GV operations two years prior to the Core satellite launch. The rationale is that GV will benefit from a two-year head start in preparation for the Core observations. The requirements for GV are being developed in collaboration with, and vetted by, the precipitation science community.