Geodesy is a research field in which shape, rotation, and gravity of the Earth as well as their temporal changes are measured for the elucidation of dynamic Earth. VERA observes the position of VLBI antennas whose separation is more than 2000 km with the accuracy of 1 mm. By combining these data with GNSS (Global Navigation Satellite System) data, the movement of antennas due to the plate tectonics and earthquakes are determined. A superconductive gravimeter measures the very small gravity changes, and these data are exchanged internationally through GGP (Global Geodynamics Project) for the study of the free oscillation of the Earth and the movement of Earth’s deep interior.
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