[inquisitive]

See https://business.esa.int/opportunities/invitation-to-tender/integrated-applications-using-ads-b

Any comments, clearly uses satellites to operate.

[LersmenThe3]

I've used ADS-B before with an SDR dongle. Very cool to see the planes around you on the screen a couple minutes before seeing them fly overhead. As for the satellite thing, no way could they track planes without some kind of eye-in-the-sky tech.