RetroPPI (stands for Retro Plane Position Indicator) is a PHP/JavaScript-based application that emulates a PPI radar display. It displays aircraft, their positions and essential data sourced via readsb or an ADSB.lol-compatible API. RetroPPI features a nostalgic PPI-style interface with green-on-black display, range rings, sweep animation, and real-time aircraft tracking.
For information on deploying, configuring, and using RetroPPI, visit RetroPPI on Codeberg