Conceptual confusion of gyroscope_random_walk

[chenxianbo]

Hi:
in kalibr wiki, gyroscope_random_walk is regarded as in run-bias- instability（the lowest point in the Allan standard deviation）, but here is regarded as "fit a 1/2 line to the right side of the allan plot, Random walk is at tau=3 ".
I am confuse about that

[kekeliu-whu]

+1