$ o2-sim -m FT3 -e TGeant3 -g pythia8 -n 1000
Output: o2sim_HitsFT3.root
$ root.exe -q ft3Tracker.C+
Output: ft3tracks.root
$ root.exe -b -q ft3Occupancy.C+
Output: ft3Occupancy.root
$ root.exe -q -b FT3TrackerChecker.C+
Output: Fittercheck_ft3tracks.root