On Friday 29 September, the European Space Agency opened the doors of the ESA Centre for Earth Observation, ESRIN, to host the ESA Open Day in the framework of the European Researchers' Night. With a full program of presentations, interviews, interactive games, hands-on workshops and various activities, more than 1400 people, among adults and children, had the opportunity to deepen their knowledge of the activities and programs in which ESA is involved every day.

More than 150 000 aircraft and 5000 airports worldwide are equipped with Satellite-based Augmentation System (SBAS) technology for safer flying. Specialists overseeing these systems met from 19 to 21 September for the 38th SBAS Interoperability Working Group meeting, hosted by ESA in Toulouse, to coordinate efforts for seamless navigation.

Our planet is being continuously bathed in radio signals from satnav satellites – which are useful for much more than just navigation. Dedicated space missions acquire these signal reflections to amass valuable environmental information. The shoebox-sized PRETTY CubeSat, flying on Europe’s next Vega launcher, will investigate a new frequency and novel observation angle to better measure the rate of climate change – at the same time as gathering radiation data on its surrounding space environment.