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warn_icon.gif IMPORTANT MESSAGE Jul 25, 2014    Nearing the end of the TRMM Era   

From PPS: Since December 1997, TRMM and the instruments it carries have provided valuable information to researchers, the applications community, and the public.  On July 8, 2014, pressure readings from the fuel tank indicated that TRMM is at the end of its fuel.  As a result, NASA has ceased station keeping maneuvers and TRMM has begun its drift downward from its operating altitude of 402 km.

 A small amount of fuel has been retained to conduct debris avoidance maneuvers to ensure the satellite remains safe during the drift down.

 TRMM observations will continue as the spacecraft descends to 335 km, at which time it will be shutdown prior to re-entry.

This date is nominally estimated to be February 2016, but may change depending on solar activity.  While TMI and LIS will continue operating during the entire drift down period, the TMI data will be affected. TMI incidence angle will be changing as will the field of view. Users should adjust their use of TMI data to reflect these changing values. However, we expect useful data to continue especially for non-climate research.

 JAXA has indicated that they may soon stop distribution of the radar data since useful science data is only possible within narrow altitude ranges near 400 and 350 km. When TRMM reaches 350 km (its original altitude), radar data may resume for a short period.

What's Hot

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UPDATE!!! Hurricane Data Analysis Tool

The Hurricane Analysis Tool allows users to overlay various data products relevant in the study of hurricanes in an area plot, a time plot or animation using an interactive tool. The data products being offered include NCEP/CPC 4-km Global (60 deg N - 60 deg S) Merged IR Brightness Temperature Dataset, TRMM's product 3B42, TMI's sea surface temperature, NCEP Reanalysis sea level pressure and QuikScat's wind. This tool is beneficial for users to obtain a visualization comparison of two products during a hurricane event.

The Hurricane Archive Gallery gets a Face Lift

Hurricane Archive Gallery gets a face lift and is now dynamic! Check out the new gallery interface that allows you to select the year and hurricanes you want to view. Data access has also been added to the gallery along with QuikScat Wind and new CloudSat images! Take a look!

Hurricane Archive Dynamic Gallery

Latest Generated 3-Hour Rainfall Total Images

These are the latest images derived from the 3-hour near-real-time rainfall total (TMPA or 3B42RT) of the Atlantic and Gulf regions. The images created using the Giovanni analysis tool with the latest available data granules. These are generated and updated on a daily basis to observe current rainfall total activity. You can view more current images and animations of these and other parameters, such as AIRS temperature and Surface Pressure, by visiting the Image Gallery. A Past Hurricane Archive is also available to view animations of data set parameters of hurricanes that developed over the Atlantic region.

3-hourly near-real-time rainfall total of the Atlantic region

 

 3-hourly near-real-time rainfall total of the Atlantic region derived from the TRMM Project Multi-Satellite
Precipitation Analysis (TMPA or 3B42RT. This image was created using the interactive Giovanni application.

Current precipitation in the Gulf region  3-hourly near-real-time rainfall total of the Gulf region derived from the TRMM Project Multi-Satellite
Precipitation Analysis (TMPA or 3B42RT). Go to Giovanni to view an interactive version.

 


Latest News

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

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IMERG data from the GPM mission provide accurate global satellite observations of rain and snow.
Feb 23, 2015 - Integrated Multi-satellitE Retrievals for GPM (IMERG) Data Released through NASA GES DISC

Data release continues heritage of TRMM with refined and improved precipitation data

+ Read More…
Radio transmitters revealed where juvenile loggerhead turtles live, in research performed with the aid of the Giovanni system.  (Picture by the University of Central Florida/Brian Boesch.)
Jan 29, 2015 - 226 scientific publications citing the Giovanni system were counted in 2014

Many different Earth science disciplines represented in research using NASA data visualization system

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The NASA GES DISC "Top 10" Highlights of 2014.  See text for explanation of each image.
Jan 23, 2015 - The NASA GES DISC Top 10 Highlights of 2014

Ten notable achievements in an eventful year for NASA Earth science data center in Greenbelt, Maryland

+ Read More…

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Last updated: May 21, 2014 09:52 AM ET