"trK v time
0.0000000000000	-0.0000000000000
0.4000000000000	-0.0395551618853
0.8000000000000	-0.0660627126423
1.2000000000000	-0.0723867998106
1.6000000000000	-0.0823475393437
2.0000000000000	-0.1091530017780