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Description

TMPA (3B42) dataset have been discontinued as of Dec. 31, 2019, and users are strongly encouraged to shift to the successor IMERG dataset (doi: 10.5067/GPM/IMERG/3B-HH/06).

This dataset was the output from the TMPA (TRMM Multi-satellite Precipitation Analysis) Algorithm. It provides precipitation estimates in the TRMM regions that have the (nearly-zero) bias of the ”TRMM Combined Instrument” precipitation estimate and the dense sampling of high-quality microwave data with fill-in using microwave-calibrated infrared estimates. The granule temporal coverage is 3 hours.

Product Summary

Platforms
TMPA
Instruments
NOT APPLICABLE
Spatial Extent

N: 50 S: -50 E: 180 W: -180

Geographic Region
TROPICS
Coordinate System
CARTESIAN
Granule Spatial Representation
CARTESIAN
Temporal Extent
1997-12-31 to 2019-12-31
Data Partner
Goddard Earth Sciences Data and Information Services Center (formerly Goddard DAAC), Terrestrial Information Systems Laboratory, Earth Sciences Division, Science and Exploration Directorate, Goddard Space Flight Center, NASA (NASA/GSFC/SED/ESD/TISL/GESDI
Concept ID
C1281704371-GES_DISC
Data State
COMPLETE
Number of Files/Granules
64280
Processing Level
3
Published
Updated
Science Keywords
Total Surface Precipitation Rate

Citation

Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.

Copy Citation

Precipitation Processing System (PPS) At NASA GSFC. (2018). TRMM (TMPA) Rainfall Estimate L3 3 hour 0.25 degree x 0.25 degree V7 [Data set]. NASA Goddard Earth Sciences Data and Information Services Center. https://doi.org/10.5067/TRMM/TMPA/3H/7 Date Accessed: 2025-12-15

Documents

Variables

Variables are a set of physical properties whose values determine the characteristics or behavior of something. For example, temperature and pressure are variables of the atmosphere. Parameters and variables can be used interchangeably. Variable level attributes provide individual information for each variable.

The Name in this table is the variable name. Fill value indicates missing or undefined data points in a variable. Valid range is the range of values the variable can store. Scale factor is used to increase or decrease the size of an object and can be used to correct for distortion. For questions on a specific variable, please use the Earthdata Forum.

Name Description Units Data Type Fill Value Valid Range Scale Factor
HQprecipitation HQprecipitation mm/hr float32 -9999.900390625 N/A N/A
IRprecipitation IRprecipitation mm/hr float32 -9999.900390625 N/A N/A
nlat nlat degrees_north float32 N/A N/A N/A
nlon nlon degrees_east float32 N/A N/A N/A
precipitation precipitation mm/hr float32 -9999.900390625 N/A N/A
relativeError relativeError mm/hr float32 -9999.900390625 N/A N/A
satObservationTime satObservationTime minutes int32 N/A N/A N/A
satPrecipitationSource satPrecipitationSource N/A int16 -9999 N/A N/A
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