GRACE Follow-On Satellites Separating from Spacecraft (Artist's Concept)

Illustration of the twin spacecraft of the NASA/German Research Centre for Geosciences (GFZ) Gravity Recovery and Climate Experiment Follow-On (GRACE-FO) mission. GRACE-FO will continue tracking the evolution of Earth's water cycle by monitoring changes in the distribution of mass on Earth.

https://photojournal.jpl.nasa.gov/catalog/PIA22447