TRMM Precipitation Radar (PR) Level 1 Power and Reflectivity Products (TRMM Product 1C21)

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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.

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 rainfall distribution ... View entire text
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Description: Access to TRMM Level 1B Product Precipitation Radar (PR) Reflectivities 1C21 data online
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Geographic Coverage
Spatial coordinates   
  N: 38.0   S: -38.0   E: 180.0   W: -180.0
Min Altitude: SURFACE Max Altitude: 23 KM

Data Set Citation
Dataset Originator/Creator: NASA,JAXA, Tropical Rainfall Measuring Mission (TRMM)
Dataset Title: TRMM Precipitation Radar (PR) Level 1 Power and Reflectivity Products (TRMM Product 1C21)
Version: 7
Online Resource:
Temporal Coverage
Start Date: 1997-12-07
Data Resolution
Latitude Resolution: 4 km
Longitude Resolution: 4 km
Horizontal Resolution Range: 1 km - < 10 km or approximately .01 degree - < .09 degree
Vertical Resolution: 125-250 m
Vertical Resolution Range: 100 meters - < 1 km
Temporal Resolution: 16 orbits per day
Temporal Resolution Range: Daily - < Weekly
Quality A Table structure (called Scan Status) is included in the HDF file,
containing entries on a scan-by-scan basis. These entries include a
geolocation flag and a data quality flag, indicating the percentage of
pixels along each scan with values within a pre-defined range.
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:
Dataset ID: TRMM PR Reflectivities 1C21

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: 42958 kb
Distribution Format: HDF
Fees: none
Phone: +81-492-98-1217
Fax: +81-492-98-1001
Email: hanaoka at
Contact Address:
Earth Observation Center
Office of Earth Observation Systems
National Space Development Agency of Japan
City: Hatoyama-machi, Hiki-gun
Province or State: Saitama
Postal Code: 350-0393
Country: JAPAN
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File Specifications for TRMM Products:

Metadata for TRMM Products:

TRMM V6 vs. V7 Major Data Format Changes:

T. Kozu, T. Kawanishi, K. Oshimura, M. Satake, H. Kumagai; TRMM
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Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2011-07-15
Last DIF Revision Date: 2013-03-22
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