Aeolus being checked for leaks

The Aeolus satellite being checked for leaks at Intespace in Toulouse, France. The satellite has two pressurised tanks that are used for its propulsion system and for the instrument’s oxygen-cleaning system. Both have to be tested to ensure there aren’t any leaks and that the valves work correctly. Although the engineers do not use any toxic substances and there isn’t any risk of explosion, these tests are carried out in a special room at Intespace.