参考资料

GRACE is a past mission that measured Earth's gravity field changes and revolutionized investigations of Earth's water reservoirs. Learn more about GRACE, explore its stories, and see its history with Hubble Space Telescope.

GRACE is a joint project between NASA and DLR to monitor mass variability on Earth using two satellites in a near-polar orbit. The mission provides monthly estimates of time-variable gravity in cm equivalent water height for 41,168 mascons, which are regions of the Earth's surface with similar gravity signatures.

GRACE flew two spacecraft in formation around Earth to measure changes in the planet's waters, ice sheets and solid Earth. The mission ended in 2017 and was followed by GRACE-FO in 2018.