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Content which is affiliated solely with the Global Precipitation Measurement Mission.

PERSIANN Dynamic Infrared–Rain Rate (PDIR-Now): A Near-Real-Time, Quasi-Global Satellite Precipitation Dataset

Submitted by LisaN on
Publication Year
Authors
Nguyen, P., M. Ombadi, V. A. Gorooh, E. J. Shearer, M. Sadeghi, S. Sorooshian, K. Hsu, D. Bolvin, and M. F. Ralph
Journal
J. Hydrometeorology
Volume
21(12)
Page Numbers
2893–2906
DOI
10.1175/JHM-D-20-0177.1
Mission Affiliation
GPM
Major Category
GPM

Advancing Passive Microwave Retrievals of Precipitation Using CloudSat and GPM Coincidences: Integration of Machine Learning with a Bayesian Algorithm

Submitted by LisaN on
Publication Year
Authors
Rahimi, R., A. Ebtehaj, and L. Milani
Journal
J. Hydrometeorology
Volume
26(5)
Page Numbers
537–553
DOI
10.1175/JHM-D-24-0040.1
Mission Affiliation
GPM
Major Category
GPM

Machine Learning for Explanation of Subgrid Convective Precipitation: A Case Study over CONUS Using a Convection-Allowing Model and SHAP Analysis

Submitted by LisaN on
Publication Year
Authors
Kang, H., and A. Abtehaj
Journal
Artificial Intelligence for the Earth Systems
Volume
4(1)
DOI
10.1175/AIES-D-24-0062.1
Mission Affiliation
GPM
Major Category
GPM

Impacts of the Transition from DMSP SSMIS to WSF-M MWI on IMERG

Date Last Updated
August 8th, 2025
Document Description

The Integrated Multi-satellitE Retrievals for the Global Precipitation Measurement (GPM) mission (IMERG) combines precipitation retrievals from all available low-orbit passive microwave (PMW) data, together with geosynchronous infrared (GEO-IR) providing baseline retrievals to compute merged global precipitation every half hour. The IMERG Early Run includes forward propagation of PMW data, while the Late Run also uses backward propagation. IMERG includes the Defense Meteorological Satellite Program (DMSP) Special Sensor Microwave Imager/Sounder (SSMIS) constellation operated by the U.S.

File Downloads
SSMIS-MWI_transition.pdf

End of SSMIS data coming to GPM Near Real-time Products

Department of Defense (DOD) FNMOC has announced its intention to shut down the current flow of operational SSMIS data on 30 June 2025. This is much earlier than the earlier announced date of September 2026, and would suspend the use of F16, F17, and F18 SSMIS data in GPM PPS. We are vigorously pursuing alternatives for continuing access to SSMIS data, but it seems likely that there will be an interruption, and perhaps end, to the SSMIS data streams. The lack of these 3 conically scanning radiometers will impact the accuracy of all IMERG products as they will have data from 3 fewer radiometers
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