In September, scientists of the ATTO project met in Manaus for our 2019 workshop. To our delight, representatives of the German Aerospace Center (DLR), project manager on the German side, and of the Brazilian Ministry for Science could join us for the entire week. During the workshop, we dedicated a large amount of time to poster sessions in a relaxed atmosphere. That way, many participants had the opportunity to present their work and had time for personal exchange with project partners. In addition, we placed another emphasis on interdisciplinary breakout sessions for topics where the research questions of different working groups overlap.