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How it works: inaccuracies

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  • How it works: inaccuracies

    Dear FR24,
    I think I have noted some inaccuracies in https://www.flightradar24.com/how-it-works:

    §1 ADS-B: "The ADS-B transponder on aircraft transmits signal containing the location (and much more)"
    should be "The ADS-B transponder on aircraft transmits signal containing the aircraft identification and optionally its location (and much more)"

    §2 MLAT: "In some regions with coverage from several FR24-receivers we also calculate positions of non-ADS-B equipped aircraft with the help of ..."
    should be "In some regions with coverage from several FR24-receivers we also calculate positions of ADS-B aircrafts, which do not transmit their position, with the help of..."

    Regards.
    RIN67630

  • #2
    If the transponder is sending a position it's classed as ADS-B.

    Automatic dependent surveillance – broadcast (ADS–B) is a surveillance technology in which an aircraft determines its position via satellite navigation and periodically broadcasts it, enabling it to be tracked. The information can be received by air traffic control ground stations as a replacement for secondary radar. It can also be received by other aircraft to provide situational awareness and allow self separation.

    https://en.wikipedia.org/wiki/Automa...0%93_broadcast

    Mode-S doesn't include positional data and these are the aircraft that FR24 tries to plot using MLAT.
    Mike


    www.radarspotting.com

    Radarspotting since 2005

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