Allan's-variance.md

@@ -5,6 +5,7 @@ Allan variance is a measure of the frequency stability of a signal over time, an
 The Allan variance is usually plotted as a function of the averaging time, and the resulting plot is called the Allan deviation. The Allan deviation plot allows for the analysis of the stability of the signal over different time scales.
 
 **There are three main regions that can be identified in an Allan deviation plot:**
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 **-   Short-term stability:** This region corresponds to averaging times of less than 1 second. In this region, the Allan deviation is dominated by random noise and is inversely proportional to the square root of the averaging time.
     
 **-   Medium-term stability:** This region corresponds to averaging times between 1 second and 1 day. In this region, the Allan deviation is dominated by the stability of the oscillator or clock.