"The satellite amateur community has often spurred innovations in the field of satellite communications. The QO-100 payload in geostationary orbit has opened up a new community that is familiar with SDRs and experiments with waveforms."

Interesting and worth a look. Presented by Frank Zeppenfeldt who "works in the satellite communications group in ESA (European Space Agency), on a number of projects related to satellite IoT and satellite 5G. We are interested to support the satellite amateur community in defining a future geostationary payload as a possible follow-up of the QO-100 payload which is currently in orbit."

https://fosdem.org/2024/schedule/event/fosdem-2024-2084-design-of-a-follow-u...

--  Jeff, KE9V