Next Generation Gravity Mission

The Next Generation Gravity Mission is a proposed Earth observation satellite mission under development by the European Space Agency's FutureEO programme. If approved, it will launch in 2032 as a pair of satellites flying in the same low Earth orbit in an in-line formation, separated by approximately 100 km. The satellites will precisely map Earth's gravity field by monitoring short-period changes in the distance between them using laser interferometry.
NGGM will form part of the MAss Change and Geosciences International Constellation together with NASA's GRACE-C pair of satellites. The MAGIC satellite constellation is intended to extend the more than two decades long time series of monthly gravity field models by the GRACE and GRACE-FO missions. If implemented, NGGM will be the first Mission of Opportunity in the FutureEO programme.