We use a GNSS ‘carrier wave’ signal, transmitted at a
very
high frequency (1575 MHz) to pinpoint the exact moment
the signal rises from 0 to 1.
You can see from the image above that the phase of the carrier signal flips when the data signal changes.
Because this signal is being transmitted at such a high frequency, it means that we can measure with far greater
precision, exactly when the signal change occurred.
This provides a much higher timing resolution, so, when we are lining up our real time and corrected signals, we know
with a much greater accuracy, when that signal changed. Therefore, we know to a much greater accuracy what the true
https://en.racelogic.support//Product_Info/VBOX_Data_Loggers/VBOX_Sigma/VBOX_Sigma_User_Guide/01_-
_VBOX_Sigma_Introduction
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