One year after Rhode Island officials abruptly closed the westbound Washington Bridge, data from a European satellite is offering new insight into what was happening to the bridge in the months before it shut down.

Target 12 asked Value.Space, a technology firm with offices in London and Estonia, to analyze data from the European Space Agency’s Sentinel-1 satellite in search of clues about the bridge’s final months. Value.Space uses the satellite data to monitor dams, bridges and other infrastructure on behalf of governments, insurers and other organizations.

Sentinel-1, which was launched in 2014, sends a radar signal down to the earth’s surface that bounces back like an echo, with new readings gathered every 12 days. That allows engineers to evaluate whether there has been any movement of a piece of infrastructure or landscape — down to the millimeter.

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