Deployment test using pendulum

ESA's Hera mission will deploy a pair of CubeSats in the vicinity of its target asteroid, deploying at a speed of just a few cm per second to prevent them risking leaving orbit and getting lost in space. The Hera Deep Space Deployer’s CubeSat Release System that will give each CubeSat their final push away had to tested in terrestrial gravity, which meant employing a pendulum-based rig plus high-speed cameras to validate the desired velocity would be reached at Dimorphos.