Advances of recent decades made high accuracy gravimetry widely available as a reliable tool to not only realize the terrestrial gravity reference with absolute gravimeters, but also to monitor gravity changes with high precision continuously over years by deploying superconducting gravimeters or with new survey concepts using quantum gravimeters. Mass change processes such as loading effects of atmosphere and ocean, volcanic activities, land uplift and glacial isostatic adjustment or water storage changes at different temporal scales can now be detected.

Technological leaps made quantum and MEMs based gravity sensors available, enabling new measurement scenarios including mobile measurements and observations of gravity gradients. Ultra stable optical clocks allow to directly determine gravity potential differences based on Einstein's theory of general relativity. Thereby, different functionals of the Earth gravity field are now accessible by measurements, opening new fields of applications with great future potential.

The session is dedicated to all aspects of high accuracy terrestrial gravity field determinations and its applications, reaching from monitoring of sub-daily variations to long-term processes in the different fields of geosciences. Contributions that document the stability and traceability of applied gravimeters and the progress of the International Terrestrial Gravity Reference Frame of IAG are as welcome as reports about the state of the art of novel techniques, improvement of established measurement solutions and advances in instrumental developments. We also strongly invite studies on field applications, e.g. volcanoloy, geothermal energy, hydrology as well as tidal, atmospheric and non-tidal loading effects.

This session is organized jointly with the IAG (International Association of Geodesy) Subcommission 2.1, IAG project "Novel Sensors and Quantum Technology for Geodesy (QuGe)" and the Horizon Europe projects EQUIP-G (Grant ID 101215427) and ERIgMEA (Project Nr: 25IEM07).