EISCAT Symposium, 49AM Optical Meeting, and Radar School, Sweden and Finland, August 2025 Registration for the Symposium as well as the Radar School preceding it is now open: The 22nd International EISCAT Symposium and the 49th Annual European Meeting on Atmospheric Studies by Optical Methods (49AM, also known as “The Optical Meeting”) will be held jointly at the Space Campus, Kiruna, Sweden, from 24th to 28th August 2026, hosted by EISCAT AB and the Swedish Institute of Space Physics (IRF). See https://eiscat.se/eiscat-symposium-2026/ Deadline Symposium: 21st April 2026. International EISCAT Radar School: the Symposium will be preceded by a Radar School, which will take place 17th to 21st August 2026 at Kilpisjarvi, Finland, hosted jointly by Sodankyla Geophysical Observatory and EISCAT AB. See https://sgo.fi/Events/RS2026/ Deadline Radar School: 31st March 2026. Welcome!