Phi_0/pi,omega/2pi [Hz],+- error [Hz]
0.069204152249135,257.557436582529,25.6758521808051
0.13840830449827,270.952099034452,16.7663632801174
0.207612456747405,269.180437399364,7.96146607844292
0.27681660899654,254.249196212292,6.06038152452169
0.346020761245675,252.407495267903,4.35129301778613
0.41522491349481,247.734160626554,4.31541915911566
0.484429065743945,236.93920453653,4.34035888089764
0.55363321799308,219.729412622012,6.03384187236733
0.622837370242215,218.438519439794,7.32765063046708
0.69204152249135,178.637831862453,10.6175101180934