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The Tropical Rainfall Measuring Mission (TRMM) satellite is a joint mission between NASA and the National Space Development Agency (NSDA) of Japan. It is designed to monitor and study tropical rainfall and the associated release of energy that helps to power the global water cycle. The satellite can greatly enhance our understanding of the interactions which produce changes in global rainfall and climate. A detailed overview of TRMM covers why we need TRMM, which is broken into grade-specific explanations; questions and answers about TRMM; TRMM instruments; climate-related facts; the Mission to Planet Earth "Education" Homepage; and case studies comparing land and ocean storms. Images showing current conditions, as well as archived images, movies, and animations are provided on hurricanes, global datasets covering lightning, temperature, and rainfall, monthly mean rainrates from 1998 through 2000, monthly rainfall anomalies, data types and idealized data simulations. Also archived are press releases, refereed journals, and scientific documents related to TRMM data information. An Educational Resources section provides teacher's guides, animations and activities on topics such as latent heat of evaporation and the water cycle, hurricanes as heat engines, air pressure systems in the context of El Nino/La Nina, lightning formation and the role of ice in a thunderstorm, and remote sensing of precipitation. The ground-based validation efforts of the TRMM are outlined in detail. Related organizations, data sources, field experiments, and TRMM research are linked from this site.

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