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PRECIPITATION MEASUREMENT MISSIONS

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Launched by NASA and JAXA in 1997, TRMM carries the first on-orbit active/passive instrument package to study the intensity and structure of tropical rainfall.

An international satellite mission launched by NASA and JAXA on Feb. 27, 2014, that will set new standards for precipitation measurements worldwide using a network of satellites united by the GPM Core Observatory.

MISSION UPDATES

Since December 1997, TRMM and the instruments it carries have provided valuable information to researchers, the applications community, and the public. On July 8, 2014, pressure readings from the...
LATEST TRMM RAINFALL DATA

Displays of realtime data on this site may be intermittent today due to server maintenance.
TRMM image of the Earth displaying the last 3 hours of global rainfall accumulation

Launch

The GPM Core Observatory successfully launched from Tanegashima Space Center, Japan, at 1:37pm EST on February 27th 2014. Use these resources to stay updated on GPM news and help celebrate this historic occasion.

Flight Project

The GPM Flight Project at Goddard Space Flight Center is responsible for the design, development, manufacturing, integration/testing, as well as operations of NASA-provided instruments, spacecraft, ground validation and data processing systems for the GPM mission.

Multimedia

Photos and videos that tell the story of the Precipitation Measurement Missions. Watch the GPM Core Observatory being built and tested at NASA Goddard, learn about the science of measuring precipitation, and more.

Science

Through an advanced set of instruments, TRMM and GPM provide new information on precipitation characteristics and how rain and snow interact within the Earth system. This section explores how space-borne precipitation measurements are acquired, processed, and utilized.