All this made possible by ADS-B:
en.wikipedia.org/wiki/Automatic…
Also, someone built a system that takes photos and then identifies all the airplanes flying over his house:
skybot.cam
NASA On our Day of Remembrance, we pause to honor the members of the NASA family who gave their lives in the pursuit of..twitter.com/i/web/status/1…2x
Elon Musk offered $5k to remove a bot tracking his flights protocol.com/elon-musk-flig…