"phi v time
0.0000000000000	0.1867765534911
0.3000000000000	0.1861610730267
0.6000000000000	0.1847231649143
0.9000000000000	0.1824788873623
1.2000000000000	0.1794519586826
1.5000000000000	0.1756765663076