FlightAware Flight Tracker

What is ADS-B?

ADS-B (Automatic Dependent Surveillance–Broadcast) is a technology used for tracking aircraft in real time. Instead of relying solely on radar, aircraft equipped with ADS-B Out transmit their GPS position, altitude, speed, and other data via radio signals. This information is received by ground stations and satellites, enabling air traffic controllers, flight tracking services, and even aviation enthusiasts to monitor flights.

How Flight Radars Work

Flight tracking websites and apps (like FlightRadar24, ADS-B Exchange, and RadarBox) gather aircraft position data from several sources:

  • ADS-B Receivers: Ground-based stations that collect ADS-B signals.

  • MLAT (Multilateration): Uses multiple receivers to determine aircraft positions that do not transmit ADS-B.

  • Satellite-Based ADS-B: Extends coverage over oceans and remote areas.

  • FAA and ATC Data Feeds: Official air traffic control data supplements ADS-B signals.

Setting Up an ADS-B Receiver for Better Coverage

You can greatly improve aircraft tracking in your area by setting up your own ADS-B receiver with a simple setup:

  • ADS-B USB Dongle (RTL-SDR or FlightAware Pro Stick): A software-defined radio (SDR) receiver that picks up 1090 MHz signals from aircraft.

  • Raspberry Pi (or any small computer): Processes and uploads data to flight tracking networks.

  • Outdoor Antenna (High-Gain 1090 MHz Antenna): Placing an antenna high up (on a roof or pole) drastically improves reception range, sometimes up to 250+ miles.

Why Set Up an Antenna?

  • Extends coverage, especially in remote or low-coverage areas.

  • Improves aircraft tracking at lower altitudes.

  • Can contribute data to networks like FlightRadar24, which may offer free premium accounts to feeder stations.

  • Fun for aviation enthusiasts and hobbyists.

By setting up an ADS-B receiver and antenna, you can play a direct role in global aircraft tracking while improving coverage in your local area.