tone code ranging

tone code ranging

[′tōn ‚kōd ‚rānj·iŋ]
(navigation)
In navigation by satellite, a method of transmitting a high-precision time signal using the reduced peak power available to a satellite; an audio frequency is used to phase an audio oscillator in the user equipment, and a train of short pulses is generated in synchronism with the zero crossings of the audio tone to provide high-resolution timing.