Date:  /  / UTC
GIF Animation:

We offer hourly global rainfall maps in near real time (about four hours after observation) using the combined MW-IR algorithm with GPM-Core GMI, TRMM TMI, GCOM-W AMSR2, DMSP series SSMIS, NOAA series AMSU, MetOp series AMSU and Geostationary IR data. Background cloud images are globally merged IR data produced by NOAA Climate Prediction Center (CPC), using IR data observed by JMA's MTSAT satellite, NOAA's GOES satellites and EUMETSAT's Meteosat satellites.

User Registartion for Near-Real-Time Data

To use data, user registration is needed. Since September 3, 2014, near-real-time products and images will be replaced by reanalysis version about 3 days later. Reanalysis data in latest version (GSMaP_MVK Ver.6.000) currently available period after September 1, 2014, but past period data will be released sequentially after processing. Reanalysis data in old version (GSMaP_MVK ver.5.222) are available for the period from Mar. 2000 to Nov. 2010, and will be removed from the server when new version data is available.

  • User Registration

Joint research with other organizations

Currently, JAXA conducts joint researches with following organizations to develop and improve the GSMaP algorithms.

Validation of the GSMaP product at each region are included in intercomparison activities of satellite precipitation products, which is promoted by the International Precipitation Working Group (

What’s New

GSMaP products are updated with product version 03D without reprocess of past period data.
GSMaP products are started reprocessing with product version 03C. All GSMaP products are reprocessed with product version 03C.
Due to network trouble in NOAA/NESDIS, AMSU and IR data is not available since 00Z 21 Oct. 2014. This affects process and accuracy of GSMaP_NRT.
Algorithm updates to the same version to the Global Precipitation Measurement (GPM) Global Rainfall Map (GPM-GSMaP) product since Sep. 3, 2014.
Browse images will be replaced by reanalysis version about 3-days later.
We resumed processing from April 24 (JST).
Due to the system failure occurred on 19 April, 2014 (JST).
JAXA, we temporarily stop update of our dataset, "Global Rainfall Map in Near Real Time (GSMaP_NRT)", at present.
We are planning to resume processing on 23 April, 2014 (JST).
Your connection may fail briefly for maintenance during the following period.
Period: 08:00(JST), Sep. 28 to 18:00(JST)
Due to the network maintenance, our Web,FTP service will be temporarily unavailable during the following times.
Times: Sep. 3, 2013, 10:30, 14:30(JST)
Due to the network maintenance, your connection may be closed during the following period.
Period: Jul. 20-21, 2013.
Due to the network maintenance, your connection may be closed during the following period.
Period: Jul. 13-14, 2013.
We have completely renewed the WEB site "JAXA Global Rainfall Watch". In addition to the mode in which to display the global data up to now, also now available in overlay mode to display Google Map.
GCOM-W1/AMSR2 and DMSP-F18/SSMIS data have been introduced to GSMaP_NRT system since 00UTC 1 July 2013.
We made the GSMaP logo. It released on the GPM HP.


Rainfall rate (mm/hr)
Global (60N - 60S)
Grid resolution
0.1 degree lat/lon
Temporal resolution
1 hour

Instruction for Users

For more details about this web site and GSMaP, please read Users Guide.

  • Readme