Dear Colleagues, The abstract submission for the 21st International EISCAT Symposium 2024 and the 48th Annual European Meeting on Atmospheric Studies by Optical Methods is now open. Abstracts related to research, radars, and optical data regarding space and atmospheric phenomena are welcome. A list of the planned session topics are provided below. The abstract submission page and more details on the conference can be found at: https://uit.no/tavla/artikkel/830164/eiscat_symposium_2024?p document_id=830164 Abstract Deadline: March 30, 2024 Conference Overview: Venue: UiT The Arctic University of Norway campus, Tromsø, Norway Dates: July 29 - August 2, 2024 EISCAT Symposium Session List: - EISCAT 3D, and Complementary Instrumentation - Magnetosphere-Ionosphere-Thermosphere Coupling - Novel Radar and Signal Processing Techniques - Imager/Aurora Studies - Satellite, Rocket, and Multi-Instrument Studies - D-region and Mesospheric Phenomena - Meteors and Space Debris - Machine Learning in Space and Atmospheric Physics - Modelling of Auroral/Magnetospheric Processes - Active Ionospheric Experiments (Heating, etc.) - Space Weather - Effects of Satellites on Incoherent Scatter Radar Measurements Optical Meeting Session List: - Novel Optical Instrumentation and Techniques - Optical Calibration Techniques - Aurora - Airglow - Atmospheric Composition, Aerosols, and Clouds (Polar Stratospheric, Noctilucent, etc.) - Meteors, Sprites, and other Transient Phenomena Accommodations: Due to the demand for hotels in Tromsø during the summer months, it is recommended to book your hotel/accommodations as soon as possible. The registration fee is expected to be ~ 3500 nok and will include coffee breaks, lunches, a visit to the EISCAT 3D Skibotn site, conference style presentations, a poster session, and a banquet dinner. For any inquiries or requests for more information, please contact: EISCAT_Norway(a)uit.no Sincerely, Devin Huyghebaert on behalf of the Local Organizing Committee Science Organizing Committee: Thomas Ulich (EISCAT) Noora Partamies (UNIS - University Center in Svalbard) Mykola Ivchenko (KTH Royal Institute of Technology) Ingemar Häggström (EISCAT) Anita Aikio (University of Oulu) Hilde Nesse (University of Bergen) Lisa Baddeley (UNIS - University Center in Svalbard) Björn Gustavsson (UiT The Arctic University of Norway) Local Organizing Committee at UiT: Björn Gustavsson, Devin Huyghebaert, Inger Solheim, Ingrid Mann