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warn_icon.gif IMPORTANT MESSAGE Oct 09, 2014    IMPORTANT: TRMM PR Data Unavailable After Oct. 07, 2014 Due to Satellite Descent   

 
Dear Science User,
 
As the descent of TRMM is underway users of TRMM PR data should be aware that the last production orbit of public PR data will be orbit #96230 on data date Oct. 7, 2014. After this time the TRMM PR data is restricted.  TRMM TMI data will continue to be produced and publicly available during the descent of the spacecraft until it reaches its decommissioning altitude of 335km.

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
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 - 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).


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

MODIS-Aqua Aerosol Optical Depth, averaged over the period March 2004 – June 2004, for the eastern tropical Atlantic Ocean.  The smoothed data display option is shown.
Oct 22, 2014 - The September 2014 issue of The Giovanni News is online

Noteworthy July & August publications, Giovanni Workshop Agenda, and plotting options in this issue

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The 2nd Gregory G. Leptoukh Online Giovanni Workshop will be held November 10 and November 12-14, 2014.
Oct 10, 2014 - The 2nd Gregory G. Leptoukh Online Giovanni Workshop – Registration Now Open

Live presentations and posters highlight research which used the NASA Giovanni system

+ Read More…
Climate change in the highlands of India could affect the production, and price, of Darjeeling tea, prized by tea connoisseurs.
Aug 29, 2014 - Summer Temperature Trends in India’s Tea-Growing Region

Climate change in the highlands of India could adversely affect the tea crop

+ Read More…
Monitoring atmospheric mercury levels at remote Amsterdam Island was the subject of one of the most interesting papers using Giovanni from the first half of 2014.
Aug 27, 2014 - The July-August 2014 issue of the Giovanni News is online

Newsletter describes the 7 "most interesting" papers from the first half of 2014

+ Read More…

+TRMM News Archive  RSS News Feed

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