TRMM Home Page


The Tropical Rainfall Measuring Mission (TRMM), a joint mission of NASA and the Japan Aerospace Exploration Agency, was launched in 1997 to study rainfall for weather and climate research. After over 17 years of productive data gathering, the instruments on TRMM were turned off on April 8. The spacecraft re-entered the Earth’s atmosphere on June 15, 2015, at 11:55 p.m. EDT, over the South Indian Ocean, according to the U.S. Strategic Command’s Joint Functional Component Command for Space through the Joint Space Operations Center (JSpOC), and most of the spacecraft was expected to burn up in the atmosphere during its uncontrolled re-entry.  

The multi-satellite 3B42*/TMPA product will continue to be produced through mid-2017 - learn more about  the transition from 3B42* to IMERG.

TRMM is a research satellite designed to improve our understanding of the distribution and variability of precipitation within the tropics as part of the water cycle in the current climate system. By covering the tropical and sub-tropical regions of the Earth, TRMM provides much needed information on rainfall and its associated heat release that helps to power the global atmospheric circulation that shapes both weather and climate. In coordination with other satellites in NASA's Earth Observing System, TRMM provides important precipitation information using several space-borne instruments to increase our understanding of the interactions between water vapor, clouds, and precipitation, that are central to regulating Earth's climate.

Extreme Weather News

Powerful Hurricane Sandra Viewed By GPM
The GPM core observatory satellite flew above hurricane Sandra on November 26, 2015 at 0706 UTC. Sandra had winds of 125 kts (144 mph) at that...
Tropical Storm Sandra
Early this morning tropical Storm Sandra became the 18th named storm of the 2015 Eastern Pacific hurricane season. Intensifying tropical storm...
Typhoon IN-FA's Extreme Rainfall Measured By GPM
Typhoon IN-FA's peaked as a category four tropical cyclone on the Saffir-Simpson scale with maximum sustained winds of about 115 kts (132 mph) on...
GPM Sees Better Organized Typhoon IN-FA
The GPM core observatory satellite had another excellent view of typhoon IN-FA on November 19, 2015 at 0305 UTC. This GPM pass revealed the...
Tropical Storm Rick Examined By GPM
Tropical storm Rick is the latest tropical cyclone to form in the 2015 Eastern Pacific Ocean hurricane season which has spawned a record number of...
GPM Monitors Western Pacific Typhoon IN-FA
On November 18, 2015 at 1533 the GPM core observatory satellite flew directly over a recently formed typhoon called IN-FA that was located near...

View the Extreme Weather Archive


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