Skip to content. | Skip to navigation

Personal tools
You are here: GES DISC Home TRMM

OVERVIEW

warn_icon.gif IMPORTANT MESSAGE Apr 16, 2015    Missing data issue in 3B42RT   

IR fill-ins ceased when CPC Global 4 km Merged IR data dropped out, starting 14 April 17:00 UTC, apparently due to processing issues at NOAA.  As a result, 3B41RT has no data and 3B42RT only has data in regions where microwave data are available.

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

The UV Erythemal Daily Dose (an OMI data parameter) was low in southern Florida on June 22, 2005.  Read the April 2015 Giovanni News to find out why.
Apr 22, 2015 - The Giovanni News, April 2015 issue, is now online

Issue features an update on the development of Giovanni-4

+ Read More…
GPM Microwave Imager (GMI) data acquired April 3, 2015 over Typhoon Maysak in the Pacific Ocean. Astronauts on the ISS also photographed Maysak on this day.
Apr 17, 2015 - Global Precipitation Measurement (GPM) data available from the NASA GES DISC

Rain and snow data from microwave imager and precipitation radar

+ Read More…
Labeled MODIS image of the "Christmas Storm" of 2013.  Dr. Mark Jury used Giovanni in his analysis of this storm, which caused flooding on several islands.
Mar 23, 2015 - The March 2015 issue of The Giovanni News is online

Issue features six interesting journal papers from the latter half of 2014

+ Read More…
Giovanni shapefile image analysis for Japan, showing heavy rainfall around Tokyo due to passage of Super Typhoons Phanfone and Vongfong in October 2014.
Mar 18, 2015 - Integrated Multi-satellitE Retrievals for GPM (IMERG) data are now in Giovanni-4

Precipitation data from the Global Precipitation Measurement (GPM) mission

+ Read More…
MODIS-Aqua nighttime temperatures in Europe, June 2008, mapped with Giovanni-4.  The data is from the Land Processes DAAC, a Federated Giovanni partner.
Feb 24, 2015 - The January-February 2015 issue of The Giovanni News is online

Issue has articles on Federated Giovanni, 2014 publication count, OMI data, and "Top 10" cake

+ Read More…

+TRMM News Archive  RSS News Feed

Document Actions
NASA Logo - nasa.gov
NASA Privacy Policy and Important Notices
Last updated: May 27, 2010 04:35 PM ET