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Description

TMPA (3B43) 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-MONTH/06).

The 3B43 dataset is the monthly version of the 3B42 dataset.

This product was created using TRMM-adjusted merged microwave-infrared precipitation rate (in mm/hr) and root-mean-square (RMS) precipitation-error estimates.
It provides a "best" precipitation estimate in a latitude band covering 50o N to 50o S, an expansion of the TRMM region, from all global data sources, namely high-quality microwave data, infrared data, and analyses of rain gauges. The granule size is one month.

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
1998-01-01 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
C1282032631-GES_DISC
Data State
COMPLETE
Number of Files/Granules
264
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/3B43) Rainfall Estimate L3 1 month 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/MONTH/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
gaugeRelativeWeighting gaugeRelativeWeighting percent int32 N/A 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
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