°The scientific discipline that deals with the measurement and representation of the earth, its gravitational field and geodynamicphenomena (polar motion, earth tides, and tectonic motion) in three-dimensional, time-varying space.
°The scientific discipline that deals with the measurement and representation of the earth, its gravitational field and geodynamicphenomena (polar motion, earth tides, and tectonic motion) in three-dimensional, time-varying space.