GGOS is the Global Geodetic Observing System. It is a component of the International Association of Geodesy (IAG), which is the organization responsible for the advancement of Geodesy. The IAG and therefore GGOS are parts of the International Union of Geodesy and Geophysics (IUGG).

The Vision of GGOS is advancing our understanding of the dynamic Earth system by quantifying our planet’s changes in space and time.