ariance for the white noise
process.</p>
    <h2 class="hasAnchor" id="note"><a class="anchor" href="#note"></a>Note</h2>

    <p>This function is based on the calculation of the theoretical allan variance 
for stationary white noise process raised in "Allan Variance of Time Series Models for 
Measurement Data" by Nien Fan Zhang. This calculation
is fundamental and necessary for the study in "A Study of the Allan Variance for Constant-Mean 
Non-Stationary Processes" by Xu et al. (IEEE Signal Processing Lett