"trK v time
0.0000000000000	-0.0000000000000
0.4000000000000	-0.0000330503685
0.8000000000000	-0.0000653356390
1.2000000000000	-0.0002074414405
1.6000000000000	-0.0004730338170
2.0000000000000	-0.0008474300074