The Aerosol Cloud meTeorology Interactions oVer the western ATlantic Experiment (ACTIVATE) team will host an online open data workshop related to NASA’s ACTIVATE field mission focused on aerosol-cloud-meteorology interactions. ACTIVATE is an ongoing multiyear mission to collect remote sensing and in situ observations of aerosols, clouds, and the atmosphere using two aircraft centered over the western North Atlantic Ocean. The team is eager to engage more data users and enhance collaboration. The free workshop will be held October 20 and 21, 2021, from 9 to 11 a.m. Eastern time both days.