How can we provide a stable reference for precise positioning and measuring changes of our planet?
The International Terrestrial Reference Frame (ITRF) provides the fundamental basis to refer the geodetic observations and estimated parameters to a unified global basis. High accuracy, consistency and long-term stability are required for precisely monitoring global change phenomena as well as for precise positioning applications on and near the Earth’s surface.
The ITRF comprises concrete points (markers) attached to the solid Earth crust with precisely determined coordinates (mean 3D positions of the stations and their motions).
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Terrestrial Reference Frame