HAPS (High Altitude Platform Stations) are flying objects in the stratosphere (approx. 20 km) that are kept geostationary and can cover areas with a diameter of 100 - 200 km with their antennas. With the appropriate equipment, they can be used for both mobile and stationary broadband services. Due to the relatively short latency times, they offer the possibility of providing very powerful broadband connections even in remote rural areas.
The study is available for download.