The Hungarian Astronaut and the crew members of the AX4 mission will observe TLEs from the International Space Station. This is the UHU project.

Latest news, updates

Lightning Alerts – an app in support of photographing TLEs

October 12., 2026
The Lightning Alerts application can also be used to find active thunderstorms. In the app, one can show only positive ground strikes, hide weak ones with a strength filter, and tap a strike to see its peak current, time, and distance and direction from you. One can also put a saved place over a distant storm area to get alerts for lightning there. The data comes... Details »

Conference presentations on lessons learned in the UHU experiment

September 15., 2026
The planning and the implementation of the UHU experiment provided several important and useful practical lessons from which future similar mission can benefit. These experiences, learned by the ground science team, have been collected and were presented in two international conferences: the 18th International Conference on Atmospheric Electricity... Details »

A Piece of Space History in a Frame!

June 17., 2026
The mission phase of the UHU project has officially come to an end. Nearly a year ago, on June 25, 2025, Tibor Kapu and his fellow astronauts embarked on the Axiom Space’s Ax-4 mission to the International Space Station. During the 18-day mission, the crew carried out numerous scientific investigations, including the UHU experiment. As part of the project... Details »

EGU26 conference poster on the contribution of citizen observers to the UHU project

May 9., 2026
A poster has been presented in the Atmospheric Electricity session of the EGU26 international conference on the great contribution of ground-based citizen observers to the UHU experiment. The poster demonstrates that all conditions were met to observe TLEs from the space and from the ground simultaneously. The only thing that prohibited the fulfillment... Details »

UHU mission debriefing

January 20., 2026
An opportunity was created for the ground science team of the UHU experiment to meet Tibor Kapu, the Hungarian astronaut of the Ax-4 mission, and discuss the practical aspect of carrying out nighttime video observations from the International Space Station. The meeting, held on the 14th of January, 2026, was particularly useful as it helped to better understand... Details »

All news »