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MISSION UPDATE 6/16/2015:

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 / TMPA-RT products products have a planned end date of December 31, 2019. The GPM IMERG dataset now includes TRMM-era data going back to June 2000, and is now the recommended multi-satellite dataset to use for most purposes. Learn more about  the transition from 3B42*/TMPA to IMERG.

TRMM was 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 provided 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 provided 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

GPM IMERG Measures Rainfall Accumulation from Hurricane Dorian in the Caribbean
Hurricane Dorian is packing heavy rain as it moves toward the Bahamas as predicted by NOAA’s NHC or National Hurricane Center. NASA's GPM mission...
IMERG Measures Flooding Rainfall in India
In early August 2019 a depression formed in the Bay of Bengal that moved over India contributing to heavy rainfall on India's west coast....
Hurricane Barry Makes Landfall in Louisiana
UPDATE 7/17/19: This GPM IMERG animation shows rainfall accumulations from #HurricaneBarry in the Gulf of Mexico from July 11-16, 2019. Learn more...
GPM Sees Developing Tropical Storm Barry in the Gulf of Mexico
NASA / JAXA’s GPM Core Observatory passed over developing Tropical Depression 2 (which was upgraded to Tropical Storm Barry later in the morning)...
GPM Flies Over Flooding Rainfall in Washington DC
Washington DC experienced extreme rainfall the morning of July 8th, 2019 when a cluster of slow-moving thunderstorms moving through the area tapped...
NASA Reveals Heavy Rainfall in Tropical Cyclone Fani
Satellite data revealed heavy rainfall in powerful Tropical Cyclone Fani before it made landfall in northeastern India. Fani brought that soaking...
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