Quick Looks - On-Line TMI Quick Look images TMI quick-looks available on-line. Each quick-look is generated at a resolution of 1/4 degree, thus generating an image of 1440x720 pixels, or a file size of about 500k.

TSDIS - TRMM Science Data and Information System The real-time processing and post-processing of the TRMM science data is performed by the TRMM Science Data and Information System (TSDIS). Working with the TRMM principal investigators and science algorithm developers, TSDIS maintains the operational science data processing system and ensures the timely processing of all TRMM science instrument data. During routine operations, raw instrument data is received in near real-time by TSDIS and then processed by the first tier of science algorithms to produce calibrated, swath-level instrument data. Using this calibrated, swath-level instrument data, the second tier of algorithms are used to compute geophysical parameters, such as precipitation rate, also at the swath-level resolution. At the final stage of TSDIS processings, the third tier algorithms produce gridded geophysical parameters from the first- and second-tier instrument data. All TRMM products are archived and distributed by the Goddard Distributed Active Archive Center (GES DISC DAAC). For further information concerning TSDIS operations go to ths TSDIS homepage.

GES DISC DAAC - Distributed Active Archive System The operational archiving and distribution to the public of all TRMM science data products is provided by the Goddard Distributed Active Archive Center (GES DISC DAAC). In addition to archiving and distributing the TRMM science data, the GES DISC DAAC also provides necessary information and support for manipulating these data files, which are provided in NCSA's Hierarchical Data Format (HDF). These files are generally distributed on-line. Finally, the GES DISC DAAC provides front-line support for any questions concerning the TRMM science data. TO obtain TRMM science data, go to the Goddard GES DISC DAAC homepage.

Data Products & Description - In order to satisfy opposing requirements for early data distribution and the highest possible data quality, TRMM will reprocess all products with improved algorithms approximately once per year. This section, aside from presenting general product information, updates the performance of each algorithm as information becomes available to the science team. Data users should check this site before working with any TRMM data, and occasionally thereafter as more informaton becomes available. All information is tied to the data version number as distributed by the GES DISC DAAC.

TRMM GROUND VALIDATION - The function of the TRMM GV program at the NASA/Goddard Space Flight Center is to provide support for Tropical Rainfall Measuring Mission (TRMM), in connection with the ground based validation of the TRMM satellite observations. The TRMM Satellite Validation is the focal point for the planning and implementation of a broad and integrated observational program of precipitation and related climate research, designed to meet the specific science validation objectives established by the TRMM science team, and which are also consistent with programmatic requirements established by NASA Headquarters

TRMM-based precipitation estimates-A series of quasi-global, near-real-time, TRMM-based precipitation estimates is available to the research community via anonymous ftp . The estimates are provided on a global 0.25 ° x0.25 ° grid over the latitude band 50 ° N-S within about seven hours of observation time. Three products are being provided: A TRMM-calibrated merger of all available TMI, AMSR-E, SSM/I, and AMSU-B precipitation estimates (three-hourly accumulations); a geosynchronous infrared estimate which is calibrated by the merged-microwave data (hourly estimates); and a combination of the first two fields (three-hourly accumulations). The data are available under ftp://trmmopen.gsfc.nasa.gov/pub/merged . Users are urged to download the README first for additional details.

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