datetime: 24-Apr-2024 10:36:02
1 4.801500e-01 3.334500e-01
2.352000e-01 1 5.550000e-01
1.642500e-01 6.000000e-01 1

mean velocity (unclean): 6.880822e+00 
mean velocity (clean): 1.672832e+02