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warn_icon.gif IMPORTANT MESSAGE Nov 23, 2015    Phasing out TRMM Version 6   

GES DISC is in the process of phasing out TRMM Version 6 data that covered the period December 1997 - June 2011. These data were superseded and obsoleted by the much improved Version 7. We also do remind that data from the TMPA Version 7 are still produced, even though the TRMM satellite was decommissioned in April, and deorbited in June, 2015. The Version 6 data will first be reduced in visibility in web search engines  and documentation, and then physically removed from the on-line archives by the end of 2015.

The Tropical Rainfall Measuring Mission (TRMM) is a joint mission between NASA and the Japan Aerospace Exploration Agency (JAXA) designed to monitor and study tropical rainfall.

Instruments onboard the TRMM satellite

Basic Information

Launch Date
November 27, 1997
Circular, non-sun-synchronous, with an inclination of 35 degrees to the Equator.
Orbit Altitude

350 km (1997/11/27 - 2001/08/08)

403 km (2001/08/24 - present)

Altitude Change
During the period of 2001/8/7 to 2001/8/14, the average operating altitude changed from 350 km to 403 km (referred to also as TRMM Boost).


Below are overview descriptions of the instruments on the TRMM satellite:

Visible Infrared Radiometer (VIRS)
The VIRS (of NOAA AVHRR heritage) is a five-channel, cross-track scanning radiometer operating at 0.63, 1.6, 3.75, 10.8, and 12 um, which provides high resolution observations on cloud coverage, cloud type, and cloud top temperatures.
TRMM Microwave Imager (TMI)
The TMI (of DMSP SSM/I heritage) is a multichannel passive microwave radiometer operating at five frequencies: 10.65, 19.35, 37.0, and 85.5 GHz at dual polarization and 22.235 GHz at single polarization. The TMI provides information on the integrated column precipitation content, cloud liquid water, cloud ice, rain intensity, and rainfall types (e.g., stratiform or convective).
Precipitation Radar (PR)
The PR, the first of its kind in space, is an electronically scanning radar, operating at 13.8 GHz that measures the 3-D rainfall distribution over both land and ocean, and define the layer depth of the precipitation.

Further information on these instruments may be found on the TRMM Instruments Web page.

Latest News

Submit an image for the 2nd Giovanni Image Hall of Fame Class!
Oct 23, 2015 - Special October 2015 issue of The Giovanni News is Online

Accepting submissions for the 2nd Giovanni Image Hall of Fame Class

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This Cross-Map Plot shows a latitude vs. pressure plot for the region between southern Hudson Bay, Canada, and the state of Florida.  AIRS atmospheric temperature data were averaged over December 15-21, 2004.
Oct 13, 2015 - The Giovanni News September-October 2015 issue is online

Urban Heat Islands in India, Version 4.16 Release Notes, and Federated Giovanni Update

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IMERG near-real-time data showed three tropical storms and typhoons spinning in the western Pacific Ocean on July 7, 2015.
Oct 01, 2015 - Near-Real-Time IMERG Early and Late Run Datasets Available at GES DISC

IMERG: Integrated Multi-satellitE Retrievals for GPM (Global Precipitation Measurement) Mission

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Giovanni-4 serves NASA Earth science data and interdisciplinary research with a multitude of analytical options, faster performance, and portability to other NASA data centers. Giovanni-4 will soon be available as open source software.
Sep 01, 2015 - Giovanni-4 takes center stage at the NASA GES DISC

Faster, more capable data exploration system replaces the previous version (Giovanni-3)

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MODIS image of the tropical Atlantic Ocean, June 24, 2009. Saharan dust and the ITCZ cause hemispheric asymmetry for aerosols and clouds, as described by Kishcha et al. Gray areas are gaps between observational swaths.
Aug 31, 2015 - July and August 2015 issues of The Giovanni News are online

July issue features summaries of six research papers using Giovanni; August issue discusses dust & color palettes

+ Read More…

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Last updated: May 27, 2010 04:35 PM ET