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ADS-B (Automatic Dependent Surveillance-Broadcast) transmits aircraft position determined by:

Q: ADS-B (Automatic Dependent Surveillance-Broadcast) transmits aircraft position determined by:

The aircraft's own GNSS receiver. ADS-B broadcasts position data derived from the aircraft's onboard GNSS receiver, along with identification, altitude, and velocity, without requiring radar interrogation.

Ground radar

Inertial navigation only

ATC SSR interrogation

The aircraft's own GNSS receiver

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