"grr v time
0.0000000000000	1.0000000000000
0.4000000000000	1.0010358078516
0.8000000000000	1.0041639748770
1.2000000000000	1.0094465500704
1.6000000000000	1.0169897113419
2.0000000000000	1.0269469236564