This Study Group is joint between Commission 1 on Reference Frames, Commission 2 on Gravity Field and Commission 3 on Earth Rotation and Geodynamics and is reporting to Commission 3. The activities of this new Joint Study Group concern the comparison of ground and space gravity measurements with geometric measurements of surface deformation.
The motivation of this Joint Study Group is to study surface deformation by comparing site displacement observations with both ground- and space-based gravity measurements. Issues that will arise when comparing site displacement with gravity measurements are differences in spatial and temporal scales and differences in sensitivity.