Engineering360: "Satellites Measure Earth Movement Down to the Millimeter"

Yepp, and then they find out that buildings are losing ground, sink and lose value and safety all at the same time.

http://www.techly.com.au/2016/08/05/san-fran-skyscraper-literally-sinking-earth/

It would be interesting to see what they're also measuring in terms of Earth tides where the ground moves vertically as much as a metre or more under the gravitational influence of the Moon and Sun.