Sure, but minute-by-minute is not needed. If you look at the last graph on the page, the one after "The pattern was especially clear on certain days, like September 1. You can easily see that interference incidents happened during or around the time belts when PV46 was in service." it is the most simple data, drawing points (the incidents) over a service timetable. These data (when the single train was in service or not) must have been available. I believe that the tricky part was the "delay" between the PV46 passing and (some time later) the "wrong braking" of another train.