ITGRF – International Terrestrial Gravity Reference Frame

ITGRF (International Terrestrial Gravity Reference Frame) is a global reference framework that provides a consistent and precise standard for gravity measurements worldwide. It integrates high-quality terrestrial gravity observations from different countries and institutions to ensure comparability and long-term stability.

ITGRF supports geodesy, geophysics, sea-level research, and Earth system science by enabling accurate monitoring of mass changes within the Earth system, such as groundwater depletion, glacial melting, and tectonic processes.