TRMM 3B42: 3-Hourly Precipitation Estimates

Dataset Availability

1998-01-01T00:00:00Z–2019-12-31T21:00:00Z

Dataset Provider

NASA GES DISC at NASA Goddard Space Flight Center

Earth Engine Snippet

ee.ImageCollection("TRMM/3B42")

Tags

3-hourly climate geophysical jaxa nasa precipitation rainfall trmm weather

Description

The Tropical Rainfall Measuring Mission (TRMM) is a joint mission between NASA and the Japan Aerospace Exploration Agency (JAXA) designed to monitor and study tropical rainfall. The 34B2 product contains a gridded, TRMM-adjusted, merged infrared precipitation (mm/hr) and RMS precipitation-error estimate, with a 3-hour temporal resolution and a 0.25 degree spatial resolution.

See the algorithm description and the file specification for details.

Documentation:

• PI Documentation

• File Specification for TRMM Products

• Comparison between TRMM versions 6 and 7

• Readme

• Details of the TMPA algorithm used in this product

• TRMM Data Gaps

• Transition from TMPA to IMERG

Bands

Resolution
27830 meters

Bands

Name	Units	Min	Max	Description
precipitation	mm/hr	0	100	Merged microwave/IR precipitation estimate
relativeError	mm/hr	0	100	Merged microwave/IR precipitation random error estimate
satPrecipitationSource				Flag to show source of data
Bitmask for satPrecipitationSource Bits 0-5: Source 0: No observation 1: AMSU 2: TMI 3: AMSR 4: SSMI 5: SSMI/S 6: MHS 7: TCI 30: AMSU/MHS average 31: Conical scanner average 50: IR
HQprecipitation	mm/hr	0	100	Pre-gauge-adjusted microwave precipitation estimate
IRprecipitation	mm/hr	0	100	Pre-gauge-adjusted infrared precipitation estimate
satObservationTime	min	-90	90	Satellite observation time minus the time of the granule. In case of overlapping satellite observations, the two or more observation times are equal-weighting averaged.

Terms of Use

Terms of Use

This dataset is in the public domain and is available without restriction on use and distribution. See NASA's Earth Science Data & Information Policy for additional information.

Citations

Citations:

• Adler, R.F., G.J. Huffman, A. Chang, R. Ferraro, P. Xie, J. Janowiak, B. Rudolf, U. Schneider, S. Curtis, D. Bolvin, A. Gruber, J. Susskind, P. Arkin, E.J. Nelkin, 2003: The Version 2 Global Precipitation Climatology Project (GPCP) Monthly Precipitation Analysis (1979-Present). J. Hydrometeor., 4(6), 1147-1167.

• Huffman, G.J., 1997: Estimates of Root-Mean-Square Random Error for Finite Samples of Estimated Precipitation, J. Appl. Meteor., 1191-1201.

• Huffman, G.J., 2012: Algorithm Theoretical Basis Document (ATBD) Version 3.0 for the NASA Global Precipitation Measurement (GPM) Integrated Multi-satellitE Retrievals for GPM (I-MERG). GPM Project, Greenbelt, MD, 29 pp.

• Huffman, G.J., R.F. Adler, P. Arkin, A. Chang, R. Ferraro, A. Gruber, J. Janowiak, A. McNab, B. Rudolph, and U. Schneider, 1997: The Global Precipitation Climatology Project (GPCP) Combined Precipitation Dataset, Bul. Amer. Meteor. Soc., 78, 5-20.

• Huffman, G.J., R.F. Adler, D.T. Bolvin, G. Gu, E.J. Nelkin, K.P. Bowman, Y. Hong, E.F. Stocker, D.B. Wolff, 2007: The TRMM Multi-satellite Precipitation Analysis: Quasi-Global, Multi-Year, Combined-Sensor Precipitation Estimates at Fine Scale. J. Hydrometeor., 8(1), 38-55.

• Huffman, G.J., R.F. Adler, M. Morrissey, D.T. Bolvin, S. Curtis, R. Joyce, B McGavock, J. Susskind, 2001: Global Precipitation at One-Degree Daily Resolution from Multi-Satellite Observations. J. Hydrometeor., 2(1), 36-50.

• Huffman, G.J., R.F. Adler, B. Rudolph, U. Schneider, and P. Keehn, 1995: Global Precipitation Estimates Based on a Technique for Combining Satellite-Based Estimates, Rain Gauge Analysis, and NWP Model Precipitation Information, J. Clim., 8, 1284-1295.

Explore with Earth Engine

Important: Earth Engine is a platform for petabyte-scale scientific analysis and visualization of geospatial datasets, both for public benefit and for business and government users. Earth Engine is free to use for research, education, and nonprofit use. To get started, please register for Earth Engine access.

Code Editor (JavaScript)

var dataset = ee.ImageCollection('TRMM/3B42')
                  .filter(ee.Filter.date('2018-04-01', '2018-04-10'));
var precipitation =
    dataset.select(['precipitation', 'HQprecipitation', 'IRprecipitation']);
var precipitationVis = {
  min: 0,
  max: 12,
  gamma: 5,
};
Map.setCenter(-79.98, 23.32, 4);
Map.addLayer(precipitation, precipitationVis, 'Precipitation');

Open in Code Editor

TRMM 3B42: 3-Hourly Precipitation Estimates

The Tropical Rainfall Measuring Mission (TRMM) is a joint mission between NASA and the Japan Aerospace Exploration Agency (JAXA) designed to monitor and study tropical rainfall. The 34B2 product contains a gridded, TRMM-adjusted, merged infrared precipitation (mm/hr) and RMS precipitation-error estimate, with a 3-hour temporal resolution and a 0.25 degree …

TRMM/3B42, 3-hourly,climate,geophysical,jaxa,nasa,precipitation,rainfall,trmm,weather

1998-01-01T00:00:00Z/2019-12-31T21:00:00Z

-50.0 -180.0 50.0 180.0

Google Earth Engine

https://developers.google.com/earth-engine/datasets