I like to follow aircraft on "flightradar24" the aircraft I track were all yellow but recently some of them have changed to pale blue. Does anyone know why some of these airplanes have changed colours.
Why are some aircraft shown as blue on the map?
Aircraft displayed as blue icons are currently being tracked via satellite. Satellites are collecting the ADS-B signals from aircraft and transmitting them to the Flightradar24 network. Space-based ADS-B tracking will be used to supplement our terrestrial receiver network.