GGOS – Global Geodetic Observing System

The Global Geodetic Observing System (GGOS) is the coordinating observing system of the International Association of Geodesy (IAG). It integrates observations from the global geodetic infrastructure—including GNSS, VLBI, SLR, DORIS, gravimetry, and related techniques—to monitor the geometry, rotation, and gravity field of the Earth. By combining these measurements, GGOS provides consistent geodetic products such as terrestrial, celestial, gravity, and height reference frames that are essential for Earth system research and many societal applications.

GGOS builds on earlier international initiatives, including the concept of an Integrated Global Geodetic Observing System (IGGOS), which aimed to coordinate global geodetic observations across techniques and disciplines. Today, GGOS provides the scientific and organizational framework for the global geodetic observing system, ensuring that geodetic data and products contribute to monitoring global change, supporting satellite navigation, and improving our understanding of the Earth system and its dynamics.

More Info: https://geodesy.science/ggos