"Automatic Dependent Surveillance–Broadcast (ADS–B) is a surveillance technology in which an aircraft determines its position via satellite navigation or other sensors and periodically broadcasts it, enabling it to be tracked"-Wikipedia.
Currently tracking aircraft around the country, Currently running on a Raspberry Pi Zero W, but i might upgrade this to a Raspbery Pi 3B+ (I do Like these machines), Running Mutability Dump 1090, that can be found here https://github.com/adsbxchange/dump1090-mutability and Virtual Radar Server. With an RTL-SDR-V.3 dongle. The feed below is what I’m picking up on my system and its also feeding Flightradar24, Which in turn grants me access to a business account with them.