The atmosphere serves as a critical component for high-energy astroparticle detectors, including Imaging Atmospheric Cherenkov Telescopes (IACTs) and both ground- and space-based cosmic-ray observatories. These instruments utilize the atmosphere as a massive calorimeter, where primary particles initiate extensive air showers and generate Cherenkov and fluorescence light. Because this medium also attenuates and scatters signals before they reach the detector, precise monitoring of aerosol and molecular conditions is essential for accurate event reconstruction. Furthermore, the growing interest in atmospheric electricity has expanded the field's scope; it is now vital to understand how these electrical phenomena affect astroparticle measurements. Conversely, the high resolution and large apertures of these detectors offer a unique opportunity to study events like ELVES and TGFs. This workshop is designed to foster interdisciplinary dialogue, with dedicated sessions for collaborative discussion.

Important dates and deadlines:
- registration open/close - 1.3. 2026 - 31.5. 2026
- abstract submission deadline - 30.4. 2026
- Notification of Acceptance - 10.5.2026
- Payment deadline - 31.5.2026
- Conference dates - 28 - 30.7.2026
- Proceeding Submission - 15.8.2026
