Ther is a standing challeng in obtaining long localized records of rainfall data in many large river basins of the developing world. Recent spaceborne instrumentation offers a constente source of rainfall information, but this information covers only a relatively limited time period. In this context, and given its consistence, a question rises on the potential offered by this new wealth of information to improve our understanding of the rainfall patterns and how to use them in order to alleviate the historical problems of scarcity of observed historical records.