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warn_icon.gif IMPORTANT MESSAGE May 12, 2016    Access and distribution of Globally-merged, full-resolution (~4 km) IR data from GES DISC   

   Access and distribution of Globally-merged, full-resolution (~4 km) IR data from GES DISC will be terminated after 30 June 2016.

   The Globally-merged, full-resolution (~4 km) IR data from geostationary satellites is available from NOAA at ftp://ftp.cpc.ncep.noaa.gov/precip/global_full_res_IR

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, 2015. The spacecraft re-entered the Earth’s atmosphere on June 15, 2015, at 11:55 p.m. EDT, over the South Indian Ocean.

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

 

Instruments onboard the TRMM satellite

Basic Information

Launch Date
November 27, 1997
Orbit
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 - July 2014)

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).


Instruments

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

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Apr 11, 2016 - How to make a GRACE-derived Drought Indicator Data Rods query

Hydrology variables generated by gravity mapping mission

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After successfully serving the Earth science community for several years, the Giovanni-3 system will be shutdown on March 31, 2016.
Mar 18, 2016 - Giovanni-3 End of Service

Completion of transition to Giovanni-4 set for March 31

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Certificate awarded to Kang et al. for the image selected to the 2nd Class of the Giovanni Image Hall of Fame. Their image displayed maps created with Giovanni of MODIS aerosol optical depth and cloud data over China.
Feb 23, 2016 - Announcing the 2nd Class of the Giovanni Image Hall of Fame

12 images selected for scientific interest and graphic presentation

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This huge dust storm over the Middle East, shown in a March 18, 2012 MODIS image, is the subject of a 2015 paper that utilized MODIS data available in Giovanni.
Feb 18, 2016 - Giovanni publications from the latter half of 2015

Final compilation counts 231 papers in peer-reviewed journals using Giovanni

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The NASA GES DISC Top 10 Highlights for 2015!  Each image represents a highlight of GES DISC activities in 2015, as described in the accompanying article.
Feb 03, 2016 - The NASA GES DISC lists its Top 10 Highlights for 2015

Increased reliability, more data, new data sets, & the next Giovanni

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Last updated: Apr 07, 2016 10:24 AM ET
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