Figure 5

Descriptive statistics of the number of keys sent to a ground station after its weight was perturbed. The figure illustrates the number of keys transferred to London every week between the years 2013 and 2019. Box plots correspond to independent runs of the SatQKD optimisation over six years with the rolling horizon of one year. In every run, the weight of the ground station was randomly changed by a small amount. The plot was drawn according to the following conventions. A box represents the area between the first and the third quantile. The horizontal line splitting the box denotes the median. Whiskers extend to the last datum below or above 1.5 times the distance between the first and the third quantile