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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

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

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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

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The 2nd Gregory G. Leptoukh Online Giovanni Workshop will be held November 10 and November 12-14, 2014.
Aug 14, 2014 - Call for Presentations: 2nd Gregory G. Leptoukh Online Giovanni Workshop

Share and disseminate how the NASA Giovanni data system is being used for scientific research

+ Read More…

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