@Alexander-Barth Thanks for sharing that! I’ll try it out soon. A student and I wrote our own APT decoder in Matlab and re-writing it in Julia has been in my to-do list for a while.
I’ve been working on introducing sat comm in my communications courses for a while (see for example A satellite ground station for teaching digital and wireless communications | IEEE Conference Publication | IEEE Xplore).
Another thing I want to do is controlling the SDR directly from Julia, that is, without needing intermediate tools like GQRX.