 The European Space Agency (ESA) is working with the United Kingdom’s University of Nottingham to monitor the movements of large structures as they happen using satellite navigation sensors. The team fixed highly sensitive satnav receivers for detecting movements as small as 1 cm at key locations on the Forth Road Bridge in Scotland. Measurements from these sensors were continuously transmitted in real time via satellite to a processing center at the university and made available via a web-based interface as part of GeoSHM, the project for Global Navigation Satellite System and Earth Observation for Structural Health Monitoring. This information was complemented by historical Earth observation satellite data to give a better overall picture of possible influences on bridge safety through gradual changes in the surrounding ground and any movements of critical structures. Because of stressed structural members and unexpected deformations due to increased traffic, extreme weather conditions such as high winds cause frequent bridge closures, resulting in enormous revenue loss per day. Bridgemaster Barry Colford observed: “This information is extremely useful for understanding how much the bridge can move under extreme weather conditions. This allows us to decide to close the bridge based on precise deformation information.”