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")

Cadence

3 Hours

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.

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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

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