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Next Generation Gravity Mission

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The Next Generation Gravity Mission (NGGM) 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.