Global Precipitation Measurement

  • Released Saturday, January 1st, 2000
  • Updated Tuesday, December 5th, 2023 at 12:00AM


The Global Precipitation Measurement (GPM) mission is an international network of satellites that provide the next-generation global observations of rain and snow. Building upon the success of the Tropical Rainfall Measuring Mission (TRMM), the GPM concept centers on the deployment of a "Core" satellite carrying an advanced radar / radiometer system to measure precipitation from space and serve as a reference standard to unify precipitation measurements from a constellation of research and operational satellites. Through improved measurements of precipitation globally, the GPM mission helps to advance our understanding of Earth's water and energy cycle, improve forecasting of extreme events that cause natural hazards and disasters, and extend current capabilities in using accurate and timely information of precipitation to directly benefit society. GPM, initiated by NASA and the Japan Aerospace Exploration Agency (JAXA) as a global successor to TRMM, comprises a consortium of international space agencies, including the Centre National d'Études Spatiales (CNES), the Indian Space Research Organization (ISRO), the National Oceanic and Atmospheric Administration (NOAA), the European Organization for the Exploitation of Meteorological Satellites (EUMETSAT), and others. The GPM Core Observatory launched from Tanegashima Space Center, Japan, at 1:37 PM EST on February 27, 2014.

For more information and resources please visit the Precipitation Measurement Missions web site.

Near Real-Time IMERG

The global IMERG precipitation dataset provides rainfall rates for the entire world every thirty minutes.

Hurricane Seasons

2023 Hurricanes & Typhoons

2022 Hurricanes & Typhoons

2021 Hurricanes & Typhoons

2020 Hurricanes & Typhoons

2019 Hurricanes & Typhoons

2018 Hurricanes & Typhoons

2017 Hurricanes & Typhoons

2016 Hurricanes & Typhoons

2015 Hurricanes & Typhoons

2014 Hurricanes & Typhoons


Other Extreme Weather

IMERG Visualizations

The satellites in the Global Precipitation Measurement Constellation provide unprecedented information about the rain and snow across the entire Earth. These visualizations show the constellation in action, taking precipitation measurements underneath the satellite orbits. As time progresses and the Earth's surface is covered with measurements, the structure of the Earth's preciptation becomes clearer, from the constant rainfall patterns along the Equator to the storm fronts in the mid-latitudes.

GPM Applications

Videos focusing on the application of GPM data around the world.

Video Features

Produced web shorts on science topics, engineering features, and team member profiles.

Live Broadcasts

Archives of live broadcast events.

Data Visualizations

Animated sequences based on actual data and/or simulations.


Conceptual and illustrative animations of GPM instruments and science concepts.

People of GPM

OLYMPEX Field Campaign 2015-2016

The Olympic Mountain Experiment, or OLYMPEX, is a NASA-led field campaign, which will take place on the Olympic Peninsula of Washington State from November 2015 through February 2016. The goal of the campaign is to collect detailed atmospheric measurements that will be used to evaluate how well rain-observing satellites measure rainfall and snowfall from space. In particular, OLYMPEX will be assessing satellite measurements made by the Global Precipitation Measurement (GPM) mission Core Observatory.

Launch Coverage

GPM launched at 1:37 PM EST on February 27, 2014, from Tanegashima Space Center, Japan.

Countdown to Launch

Short videos highlighting major steps along the way from Goddard Space Flight Center, Md., to launch from Tanegashima Island, Japan.

Raw Media for Broadcast

HD broadcast-quality footage of the GPM Core spacecraft in various stages of integration and testing, as well as the shipping of the spacecraft to Japan in preparation for launch.

Prelaunch Press Briefings

Press briefings held on January 27, 2014, from Goddard Space Flight Center.

High Resolution Still Images

Large images of the GPM Core spacecraft over several building, testing and integration milestones.

Educator Resources

These are elements that may be used as materials in presentations.