The contract between ESA and Arianespace to launch the ADM-Aeolus satellite was signed on 22 July 2016 by ESA’s Director of Earth Observation Programmes, Josef Aschbacher, (left) and CEO of Arianespace, Stéphane Israël, (right) in the presence of Jan Woerner, ESA Director General, (centre), at ESA headquarters in Paris, France. Aeolus will be launched on a Vega rocket from Europe’s Spaceport near Kourou in French Guiana at the end of 2017. Using novel laser technology, this new mission will provide profiles of wind, aerosols and clouds to advance our understanding of atmospheric dynamics and to improve weather forecasts.