"vel[0] v time
0.0000000000000	0.0000000000000
0.3515742187500	0.0007551276159
0.7031484375000	0.0009756832230
1.0547226562500	0.0011930656332
1.4062968750000	0.0014341473286
1.7578710937500	0.0017081065339
2.1094453125000	0.0019987791114
2.4610195312500	0.0022989985284