The Laser Infra-Red Imaging Sensors (LIRIS) demonstration, developed by Airbus for ESA tested new rendezvous sensors during a special flyunder manoeuvre 8 August, four days before ATV Georges Lemaître docked with the International Space Station.
The LIRIS sensors were activated during ATV-5's mission and monitored at the ATV Control Cetnre with experts on the LIRIS team confirming that the sensors were working correctly.
The data from LIRIS was not used by Georges Lemaître itself nor sent to ground control straight away as a large amount of data was generated. Instead data was saved on dedicated recorders. ATV-5 relied on the usual optical sensors (videometers and telegoniometers) for navigation to achieve a perfect docking with the International Space Station - an accuracy of less than 5 mm!