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GRACE-FO Launch Press Kit

Image of the spacecraft in orbit over Earth, with the black of space.

Many of today’s most pressing climate science challenges hinge on knowing how and where water is moving on Earth. GRACE-FO will continue the successful partnership between NASA and the German Research Centre for Geosciences (GeoForschungsZentrum – GFZ).

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NASA scientists used GRACE data to identify regional trends of freshwater movement, and combined that information with data from other satellites, climate models and precipitation measurements to d...
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The Gravity Recovery and Climate Experiment, or GRACE mission, used precise measurements of the motions of two spacecraft in Earth’s orbit to track the movement of water through the oceans, land, and atmosphere.
For 15 Years, GRACE Tracked Freshwater Movements Around the World
The twin satellites of NASA's Gravity Recovery and Climate Experiment Follow-on, or GRACE-FO, will track the movement of water around Earth. This short video explains how and why it's important.
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Explaining why GRACE-FO is so important.
Why Is GRACE-FO So Important?
This map from September 2015 shows deep drought in California, Nevada and Texas. 
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While the GRACE mission was active, scientists at NASA’s Goddard Space Flight Center generated groundwater and soil moisture drought indicators like this every week from GRACE data on terrestrial water storage and other observations, using a numerical model of land surface water and energy processes.
Groundwater Drought Indicator
GRACE-FO will measure Atlantic Ocean bottom pressure as an indicator of deep ocean current speed, as GRACE did. 
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GRACE-FO will measure Atlantic Ocean bottom pressure as an indicator of deep ocean current speed, as GRACE did. This pattern of above-average (blue) and below-average (red) seafloor pressure in 2009 GRACE data revealed a temporary slowing of deep ocean currents.
Ocean Bottom Pressure
The two GRACE-FO satellites are seen from GFZ’s Satellite Laser Ranging Station in Potsdam, Germany, on May 23, 2018 at 22:16 UTC and 22:17 UTC, respectively.
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The bright lights of the spacecraft are seen against the dark black of space.
GRACE-FO Satellites From Potsdam
GRACE Follow-On (GRACE-FO) continues the legacy of GRACE, tracking Earth’s water movement and surface mass changes across the planet. Monitoring changes in ice sheets and glaciers, near-surface and...
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GRACE Follow-On (GRACE-FO) continues the legacy of GRACE, tracking Earth’s water movement and surface mass changes across the planet. Monitoring changes in ice sheets and glaciers, near-surface and underground water storage, the amount of water in large lakes and rivers, as well as changes in sea level and ocean currents provides an integrated global view of how Earth’s water cycle and energy balance are evolving.
GRACE-FO Mission Brochure
Illustration of GRACE-FO in orbit (view 4)
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Illustration of GRACE-FO in orbit
Illustration of GRACE-FO (View 4)
GRACE-FO in a protective shipping container arriving at a new facility at Vandenberg Air Force Base, California.  
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GRACE-FO in a protective shipping container arriving at a new facility at Vandenberg Air Force Base, California.
GRACE-FO Arrives at Vandenberg
Illustration of GRACE-FO in orbit (view 5).
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Illustration of GRACE-FO in orbit over Earth.
GRACE-FO in Orbit (View 5)
GRACE Follow-On continues the critical mission of measuring the movements of mass within and between Earth’s atmosphere, oceans, land and ice sheets, as well as below Earth’s surface.
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GRACE Follow-On, scheduled to launch in spring 2018, will continue the critical mission of measuring the movements of mass within and between Earth’s atmosphere, oceans, land and ice sheets, as well as below Earth’s surface.
GRACE-FO Fact Sheet
The rainy and dry seasons in the Amazon Basin in 2004, revealed by gravity anomalies observed by GRACE. Reds and pinks show where and when mass was higher than average, a sign that more water was p...
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The rainy and dry seasons in the Amazon Basin in 2004, revealed by gravity anomalies observed by GRACE. Reds and pinks show where and when mass was higher than average, a sign that more water was present, and blues show months when mass was lower.
Rainy and Dry Seasons in the Amazon (2004)
A simplified example of how the distance between the GRACE-FO satellites changes as they pass from the Caribbean Sea across Colombia and Peru.
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A simplified example of how the distance between the GRACE-FO satellites changes as they pass from the Caribbean Sea across Colombia and Peru (which have higher mass than the oceans) to the Pacific Ocean. Panel 1: When both spacecraft are over the ocean, the distance between them is relatively constant.
How GRACE-FO Measures Gravity
Illustration of GRACE-FO in orbit (view 2).
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Twin spacecraft of GRACE-FO in orbit over Earth.
GRACE-FO in Orbit (View 2)
This visualization displays monthly GRACE data in the Amazon basin, demonstrating water storage and movement. 
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This visualization displays monthly GRACE data in the Amazon basin. GRACE (Gravity Recovery and Climate Experiment) measures mass distribution and in this instance is used to demonstrate water storage and movement in the basin.
Amazon Basin Monthly GRACE Data
Flames from the SpaceX Falcon 9 rocket launching GRACE-FO into orbit.
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A close-up of the flames from the rocket launching GRACE-FO.
Rocket Flames
The GRACE-FO satellites are nearly identical. The Microwave Interferometer (MWI) will measure the minute variations in distance between the spacecraft.
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The GRACE-FO satellites are nearly identical. The Microwave Interferometer (MWI) will measure the minute variations in distance between the spacecraft.
GRACE-FO Instruments
GRACE-FO, a collaboration between NASA and German Research Centre for Geosciences (GFZ), launched from Vandenberg Air Force Base on on May 22, 2018.
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A vertical image of the rocket launching in front of a blue sky.
GRACE-FO Launches
A long exposure of the  GRACE-FO launch from Vandenberg
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The rocket's blaze is seen across the sky in this long exposure view with the ocean in the foreground.
GRACE-FO Launch, Long Exposure
The GRACE-FO satellites were assembled by Airbus Defence and Space in Germany. The photo shows the satellites in the testing facility of IABG, an Airbus subcontractor, in Munich (view 1).
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The GRACE-FO satellites were assembled by Airbus Defence and Space in Germany.
GRACE-FO Satellites During Testing
Monthly changes in ocean bottom pressure data obtained by the GRACE satellites from November 2002 to January 2012. 
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Monthly changes in ocean bottom pressure data obtained by the GRACE satellites from November 2002 to January 2012.
Ocean Bottom Pressure 2002-2012
Work begins to build NASA’s twin satellites, under construction by Airbus Defense and Space.
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NASA’s twin satellites, under construction by Airbus Defense and Space, will be the follow-on spacecraft of the GRACE mission, which have contributed significantly to global climate research since 2002.
Build Commences on GRACE-FO Satellites
The Laser Ranging Interferometer instrument.
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The Laser Ranging Interferometer instrument.
Laser Ranging Interferometer
Gravity variations studied by GRACE can be used to determine ground water storage on land masses. 
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Gravity variations studied by GRACE can be used to determine ground water storage on land masses. By comparing current data to an average over time, scientists can generate an anomaly map to see where ground water storage has been depleted or increased.
Global Terrestrial Water Storage Anomaly
An artist's rendering of the twin GRACE-FO spacecraft.
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An artist's rendering of the twin GRACE-FO spacecraft in orbit around Earth.
GRACE-FO Rendering
The GRACE mission launched in 2002, changing our understanding of Earth.
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The GRACE mission launched in 2002, changing our understanding of Earth.
15 Years of GRACE

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