I have to dive in a bit more to give good and specific guidance/context, but fundamentally, your system will require a shim to "speak" $UAT_SOURCE and the output this would expect, assuming the source was an sdr. Want help writing the code for this? Specs to build requirements RNO-G in -> SDR out are welcome.
https://airplanes.live/hardware/
https://sdr-enthusiasts.gitbook.io/ads-b/ might also be of value.