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OVERVIEW

warn_icon.gif IMPORTANT MESSAGE Jul 24, 2015    Why do my Data Holdings look different?    

Accessing your data through the GES DISC web site may seem a little unfamiliar to you to these days, but we can assure you, your data is all still available. The location of the data in the online archive has not changed.

The GES DISC has implemented a new interactive interface to make finding data easier than ever. We've added features like searching by keywords, filtering by criteria such as measurements, processing level and spatial resolution, and sortable data columns so now you can fine tune your search results. To get you started we put together a Help document to introduce you to the new interface. If you have any questions about the new design please contact us using the Feedback link in the upper right-hand corner or contact the GES DISC Help Desk by sending email to gsfc-help-disc@lists.nasa.gov.

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

"Data Rods" provide a way for hydrologists and meteorologists to easily use data acquired by NASA satellites.
Aug 06, 2015 - “Data Rods” from the NASA GES DISC

Transforming satellite observations of Earth into temporal data for specific locations

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This visualization of Tropical Rainfall Measuring Mission (TRMM) data for June 17, 2013 shows the heavy rainfall in northern India that contributed to the Kedarnath flood and landslide disaster.
Jul 30, 2015 - Giovanni publications update, January-June 2015

Data system employed for a wide variety of Earth science research using NASA data

+ Read More…
The ESIP Federation was founded in 1998.
Jul 13, 2015 - Staff represent GES DISC at ESIP Federation summer meeting

Earth Science Information Partners (ESIP) Federation combines science, data, and information technology

+ Read More…
MERRA's northward wind data show several areas of high wind speeds in January 2012, including an area near the Amery Ice Shelf.
Jun 12, 2015 - Online now: May-June 2015 issue of The Giovanni News

Newsletter includes articles on crab plover research, Southern Ocean winds, and time-series data

+ Read More…
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…

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