Lesson 5. Observing Earth gravity: the geoid and its use to compute ocean dynamic topography
Gravimetric satellites, including GOCE, have improved our knowledge of the geoid. As a result we are now able to calculate the mean ocean currents from altimetry measurements of sea surface height - something that was not possible before the advent of gravimetric satellites. This lesson introduces the geoid as computed from GOCE measurements. It highlights some of the geoid features that match either deep inhomogeneities, or reliefs in the Earth's crust, and explains how these influence sea surface height.