#business # [[Epistemic status]] #godel-uncertain # Universal #outdated #idea https://www.rtl-sdr.com/ I used it in the past to intercept boats and airplane communication and show on a map I coded it in like, 2 hours... You can collect GSM networks and everything too, like space stuff Could build a box all packaged that host a web page showing all radio communication around on a map etc pain in the ass for dealing with government legal stuff