Open Source software: Check!
Open Source hardware: Check!
They have made a really good effort with this, and I commend them for releasing it as they have. However…
Open Source Radio Modulation: Nope. LoRa. Again.
As has been discussed in another thread on this forum, a lot of us feel that LoRa doesn’t fit into the open source space ecosystem. It’s a proprietary modulation, and the SDR-based implementations which do exist (e.g. gr-lora) had to be reverse engineered and perform poorly as a result. Then there’s the question about patent infringement, and how Semtech would respond to an open source, reverse engineered implementation of their modulation.
LoRa appears to be the ‘in thing’ at the moment, and allows satellite designers to ride the IoT buzzword train. But there are alternatives available which don’t require the use of proprietary modulation, and would allow for the use of SDR-based ground-station networks (like… SatNOGS). The AX5243 (successor to the AX5043) is one such example of a radio chip that will do this.