Bavaria based company, H3 HATS GmbH announced the first successful demonstration of 5G connectivity between a GROB G520 flying radio tower in FL450 and 5G capable smart phone.

The flight trial was run together with the Deutsche Telekom AG (DTAG) and the Saudi Communications and Information Technology Commission (CITC) in the airspace of Saudi Arabia above the area of the Red Sea Project.


Video and Audio calls were established between the G520 flying radio tower in 45000 ft and a smartphone static on ground, a smartphone on a moving boat on the red sea and a smartphone in a moving car in the area of the red sea project. All test showed the possibility of telecommunication via a flying radio tower with a latency of a few milliseconds and a data rate of 80 – 100 Mbit/s. The H3 Company proved successfully that the G520 is the perfect high altitude platform for telecommunication purposes from the stratosphere. It could be demonstrated that telecommunication via a flying radio tower could be a possible future to extend telecommunication networks or to bring data connectivity in disaster or hardly accessible areas.



Robert Schmoldt, the COO of the H3 HATS Company said, “We have achieved the worlds first demonstration of 5G telecommunication via the stratosphere with the GROB G520 as a high altitude flying radio tower. This is a huge milestone for the global telecommunication industry and brings HAP-systems to the next level.”

The H3 HATS Company develops also future HAP-systems, which can be operated autonomously in constellations. A huge goal of this development is a very high level of sustainability. This includes the development of “green” propulsion system for a future HAP-system.