Figure 5

Key statistics of rotational activities include duration of PS, number of rotations of PS, total number of PS and number of locations with PS. The histograms in (a,b) show that there is a higher incidence of short-lived PS than PS with ≥2 rotations. For the PS with ≥2 rotations, most have less than 20 full rotations, and only 1 exhibits more than 60 rotations, lasting over 2400 ms. (c) Shows the total number of PS, as well as the number of locations with PS as a function of time for the 2 categories of PS. The number of short-lived PS is always less than that the number of PS with over 2 rotations. However, in terms of the number of locations occupied by the PS, these two categories of PS are similar.