What is the main underlying operating principle of the Very-high-frequency Omnidirectional Range (VOR) aircraft navigational system?

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Multiple Choice

What is the main underlying operating principle of the Very-high-frequency Omnidirectional Range (VOR) aircraft navigational system?

VOR provides bearing by comparing the phase of two signals transmitted by the station. The station sends a reference signal with a fixed phase and a second signal whose phase varies with direction, creating a phase relationship that depends on the aircraft’s azimuth relative to the station. The aircraft’s VOR receiver measures the phase difference between these two signals and converts that into the bearing (radial) from the station. This phase difference is what tells you which direction you are from the VOR. The time it takes for a signal to travel isn’t used to determine bearing here, altitude isn’t determined from a phase difference, and distance isn’t derived from the phase difference of two signals in this system.

VOR provides bearing by comparing the phase of two signals transmitted by the station. The station sends a reference signal with a fixed phase and a second signal whose phase varies with direction, creating a phase relationship that depends on the aircraft’s azimuth relative to the station. The aircraft’s VOR receiver measures the phase difference between these two signals and converts that into the bearing (radial) from the station. This phase difference is what tells you which direction you are from the VOR.

The time it takes for a signal to travel isn’t used to determine bearing here, altitude isn’t determined from a phase difference, and distance isn’t derived from the phase difference of two signals in this system.

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