TRMM Combined Precipitation Radar (PR) and TRMM Microwave Imager (TMI) Gridded Rainfall Product (TRMM Product 3B31)
Entry ID: GES_DISC_TRMM_3B31_V7

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Summary
Abstract: The TRMM Microwave Imager (TMI) is a nine-channel passive microwave radiometer which builds on the heritage of the Special Sensor Microwave/Imager (SSM/I) instrument. It is flown aboard the Defense Meteorological Satellite Program (DMSP) platforms.

The TRMM Precipitation Radar (PR), the first of its kind in space, is an electronically scanning radar, operating at 13.8 GHz that measures the 3-D ... View entire text
Related URL
Description: OPeNDAP Earth Science Data TRMM 3B31.
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Caption:  3B31 TRMM combined monthly accumulated surface rainfall
 
Geographic Coverage
Spatial coordinates   
  N: 40.0   S: -40.0   E: 180.0   W: -180.0

Data Set Citation
Dataset Originator/Creator: NASA,JAXA, Tropical Rainfall Measuring Mission (TRMM)
Dataset Title: TRMM Combined Precipitation Radar (PR) and TRMM Microwave Imager (TMI) Gridded Rainfall Product (TRMM Product 3B31)
Version: 7
Online Resource: http://mirador.gsfc.nasa.gov/cgi-bin/mirador/presentNavigation.pl?t...
Temporal Coverage
Start Date: 1997-12-01
Data Resolution
Latitude Resolution: 0.5 degrees
Longitude Resolution: 0.5 degrees
Horizontal Resolution Range: 10 km - < 50 km or approximately .09 degree - < .5 degree
Temporal Resolution: Monthly
Temporal Resolution Range: Monthly - < Annual
Quality The current version of 3B31 only checks various quality flags in the 2A12, but not the 2B31. The recent version of 2B31 has provided an uncertainty index. The quality check of 2B31 will be added in the next version to remove any input data with poor quality. Pixels for which the 2A12 is either zero, or unreliable, currently do not allow the user to reconstruct the 2B31 original solution. This will be addressed in the next reprocessing. It may require a file format modification.
Access Constraints None
Ancillary Keywords
Data Set Progress
IN WORK
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: http://disc.gsfc.nasa.gov/

Data Center Personnel
Name: GES DISC HELP DESK SUPPORT GROUP
Phone: 301-614-5224
Fax: 301-614-5268
Email: gsfc-help-disc at lists.nasa.gov
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
Distribution Media: FTP
Distribution Size: file size; 383 KB
Distribution Format: HDF
Fees: none
Personnel
Role: TECHNICAL CONTACT
Phone: (301) 614-5165
Fax: (301) 614-5268
Email: gsfc-help-disc at lists.nasa.gov
Contact Address:
Hydrology Data Support Team, Code 610.2
Goddard Space Flight Center
City: Greenbelt
Province or State: MD
Postal Code: 20771
Country: USA
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Publications/References
File Specifications for TRMM Products: ftp://pps.gsfc.nasa.gov/pub/v7filespec/filespec.TRMM.V7.pdf

Metadata for TRMM Products: ftp://pps.gsfc.nasa.gov/pub/v7filespec/filespecMeta.TRMM.V7.pdf

TRMM V6 vs. V7 Major Data Format Changes: http://pps.gsfc.nasa.gov/Documents/formatChangesV7.pdf

Haddad, Z. S., E. A. Smith, C. D. Kummerow, T. Iguchi, M. R. Farrar, S. L. Durden, M. Alves, and W. S. Olson, 1996: "The TRMM 'Day-1' Radar/Radiometer Combined Rain-Profiling Algorithm", http://trmm.jpl.nasa.gov/paper.html
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2011-07-19
Last DIF Revision Date: 2013-03-22
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