Engineers getting CONCERTO ready for installation

Johannes Goupy and Michael Cantzer, engineers from the CONCERTO consortium and from ESO, respectively, work on the instrument, fixing a minor mechanical interference before installation on the ESO-operated Atacama Pathfinder EXperiment (APEX). The engineers are following the COVID-19 safety rules, wearing masks despite the lack of oxygen and hard work at the 5100m-high Chajnantor plateau, where APEX is located.