I had an old Raspberry Pi, a RTL based SDR and an antenna that can be best described as a bit of wet string. But the results are incredibly satisfying. (Receiving 1090MHz ADSB signals from aircraft around my home). After playing with that for a while I thought as I’m also massively into HF I would try the same with HFDL ACARS. Sadly it appears that aircraft using HFDL don’t send a great amount of positional info and hardly ever an altitude, heading or speed. Now researching L-Band 😁 #HFDL #ACARS