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Gravity changes with periods ranging 10 seconds to pluriannual, with a precision better than 10 (nm/s²)²/Hz, corresponding to a precision of 0.2 nm/s² (or 0.02 μGal) at a period of 100 s.
IGETS continues the Global Geodynamics Project (GGP) which became a service of IAG in June 2015.