June 25., 2025

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June 24., 2025

At the time of writing this post, the AX4 mission is scheduled for launch on 25 June at 6:31 UTC. With the launch of the mission, the UHU ground-based TLE observation campaign starts, too. Regardless of the launch of the AX4 mission, we start the TLE ground observation campaign in the framework of the UHU experiment on 25 June. We welcome observation materials... Details »

June 15., 2025

At the end of the section summarizing the most important characteristics of TLEs, video footages have been inserted on thunderstorms and TLEs observed on different continents. These high-quality records demonstrate the level of photography one can reach with acquiring some knowledge and having patience and perseverance. Starting these activities requires... Details »

June 11., 2025

Please keep an eye on the AX4 website for information on the launch date of the space mission. Please note that the associated ground observation campaign starts on the launch date. The launch date has been delayed recently more times due to different reasons, but it can be announced any minute.
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June 10., 2025

A new call for submitting TLE photos was added and the description on the observation methodology has been extended. Enjoy! We are looking forward to receiving your observations and photos!
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June 6., 2025

Find it in its own section.
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June 3., 2025

The website is now open. Thank you for your interest, we hope you enjoy browsing!
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