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TRMM/TMPA 3-Hourly 0.25 deg. TRMM and Others Rainfall Estimate Data

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Abstract: The Tropical Rainfall Measuring Mission (TRMM) is a joint U.S.-Japan satellite mission to monitor tropical and subtropical precipitation and to estimate its associated latent heating. TRMM was successfully launched on November 27, at 4:27 PM (EST) from the Tanegashima Space Center in Japan.

The rainfall measuring instruments on the TRMM satellite include the Precipitation Radar (PR), an ... View entire text
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Caption:  3B42 TRMM and others combined 3 hour accumulated surface rainfall
Description:  Sample of 3B42.

Geographic Coverage
Spatial coordinates   
  N: 50.0   S: -50.0   E: 180.0   W: -180.0

Data Set Citation
Dataset Originator/Creator: Tropical Rainfall Measurement Mission Project (TRMM)
Dataset Title: TRMM/TMPA 3B42 TRMM and Others Rainfall Estimate Data V7
Dataset Series Name: TRMM_3B42
Dataset Release Date: July 2011
Dataset Release Place: Greenbelt, MD
Dataset Publisher: Goddard Space Flight Center Distributed Active Archive Center (GSFC DAAC)
Version: 7
Online Resource:
Temporal Coverage
Start Date: 1998-01-01
Location Keywords
Data Resolution
Latitude Resolution: 0.25 degree
Longitude Resolution: 0.25 degree
Horizontal Resolution Range: 10 km - < 50 km or approximately .09 degree - < .5 degree
Vertical Resolution: Surface
Temporal Resolution: 3-hourly
Temporal Resolution Range: Hourly - < Daily
Quality Random error estimates (mislabeled “relative error” for historical reasons) are provided for each 0.25 x 0.25 degree box. The quality of the 3B42 product is highly sensitive to the quality of the input data: TMI (product 2A12), TRMM Combined Instrument (TCI; product 2B31), and the other input datasets listed in the Summary. If the quality of the input data is less than anticipated, then the quality of 3B42 will also be less. For more, see,
Access Constraints None
Ancillary Keywords
Data Set Progress
Originating Center
Data Center
Goddard Earth Sciences Data and Information Services Center (formerly Goddard DAAC), Global Change Data Center, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA Supplemental Info
Data Center URL:

Data Center Personnel
Phone: 301-614-5224
Fax: 301-614-5268
Email: gsfc-help-disc at
Contact Address:
Goddard Earth Sciences Data and Information Services Center
Code 610.2
NASA Goddard Space Flight Center
City: Greenbelt
Province or State: MD
Postal Code: 20771
Country: USA
Distribution Media: FTP
Distribution Size: file size: 10949 kb
Distribution Format: HDF
Fees: none
Phone: 301-614-6308
Fax: 301-614-5492
Email: George.J.Huffman at
Contact Address:
NASA Goddard Space Flight Center
Mailstop 612
City: Greenbelt
Province or State: MD
Postal Code: 20771
Country: USA
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Product Readme:

File Specifications for TRMM Products:

Metadata for TRMM Products:

TRMM V6 vs. V7 Major Data Format Changes:

TMPA Restarted with October 2014: ... View entire text
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2011-07-19
Last DIF Revision Date: 2016-01-20
Future DIF Review Date: 2016-07-31