Precipitation Measurement Missions

Launched by NASA and JAXA in 1997, TRMM carries the first on-orbit active/passive instrument package to study the intensity and structure of tropical rainfall.

An international satellite mission to be launched by NASA and JAXA in 2014 that will set new standards for precipitation measurements worldwide using a network of satellites united by the GPM Core Observatory.

Public Invited to Webinar on Citizen Science

NASA and the Community, Collaborative Rain, Hail, and Snow Network (CoCoRaHS) run by Colorado State University, Fort Collins, invite the public to participate in a free webinar on February 13th 2013 to promote citizen science that involves rain and snow measurements across the United States. CoCoRaHS is a citizen scientist network with more than 16,000 volunteers nationwide that encourages volunteers of all ages to record and monitor precipitation using...

GPM "Let It Snow" Photo Contest

GPM is proud to announce the follow-up to our popular Extreme Weather Photo Contest! Winter winds blow in cold air, snow, ice, freezing rain, and a slew of other cold weather phenomena. What is winter like in your area or favorite vacation spot? Post your coolest photos of winter weather and we'll pick the best ones to feature on the NASA Precipitation Measurement Missions websites! UPDATE: Submissions accepted from 1/7/13 -> 2/4/13

GCPEx: What We Don't Know About Snow

Weather forecasts have come a long way, but almost every season there's a snowstorm that seems to come out of nowhere, or one that's forecast as 'the big one' that turns out to be a total bust. In the last ten years, scientists have shown that it is possible to detect falling snow and measure surface snowpack information from the vantage point of space. But there remains much that is unknown about the fluffy white stuff.

NASA's D3R radar at the GCPEx field campaign.

Core Observatory Enters TVAC Chamber

On Tuesday, Dec. 4, 2012, the Global Precipitation Measurement (GPM) mission Core Observatory began thermal vacuum testing at NASA's Goddard Space flight Center in Greenbelt, Md. Thermal vacuum testing is part of GPM's environmental test program to ensure that the satellite is ready for the harsh conditions of space.

Tropical Rainfall Measuring Mission Turns 15

When it rains it pours, goes the saying, and for the last 15 years, the data on tropical rainfall have poured in. NASA's Tropical Rainfall Measuring Mission (TRMM) was launched on Nov. 27, 1997, and for the last decade and a half has enabled precipitation science that has had far reaching applications across the globe.

MISSION UPDATES

Monday, December 17, 2012

GPM Continues Environmental Testing

The GPM Core spacecraft has completed hot and cold thermal balance testing in the thermal vacuum chamber at NASA's Goddard Space Flight Center. Next it will undergo hot and cold cycle thermal...

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LATEST RAINFALL DATA

TRMM image of the Earth displaying the last 3 hours of global rainfall accumulation

Download TRMM Data | Extreme Events | Precipitation Maps

Science

Through an advanced set of instruments, TRMM and GPM provide new information on precipitation characteristics and how rain and snow interact within the Earth system. This section explores how space-borne precipitation measurements are acquired, processed, and utilized.

Flight Project

The GPM Flight Project at Goddard Space Flight Center is responsible for the design, development, manufacturing, integration/testing, as well as operations of NASA-provided instruments, spacecraft, ground validation and data processing systems for the GPM mission.

Multimedia

Photos and videos that tell the story of the Precipitation Measurement Missions. Watch the GPM Core Observatory being built and tested at NASA Goddard, learn about the science of measuring precipitation, and more.

Data Access

TRMM provides a collection of rainfall products spanning the period of 1998 to the present. Once the Core Observatory is launched, GPM will provide a set of next-generation precipitation products covering the globe. This section outlines the various ways to query, view, and download these precipitation products.

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MISSION UPDATES

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