CAL group

We did the calibration measurements and update the prameters.

Estimated parameters in the Pre-maintenance measurements are as follows.
 H_etmxtm = 3.840823152e-14@10Hz ( 0.04% from previous measurements)
 H_etmxim = 1.546766367e-14@10Hz  ( 0.70% from previous measurements)
 Optical_gain =  2.114710228e12         ( -0.69% from previous measurements)
 Cavity_pole = 18.100765775 Hz           ( -0.15% from previous measurements)

Previous values are listed in klog#34424.

Fig. 2 and Fig.4 shows the ratio of the sensing functions estimated.

Estimated parameters in the Post-maintenance measurements are as follows.
 H_etmxtm = 3.839861341e-14 @10Hz ( -0.03% from pre-maintenance measurements)
 H_etmxim =  1.484142700e-14@10Hz ( -4.05 % from pre-maintenance measurements)
 Optical_gain =  2.126367691e12         ( 0.55 % from pre-maintenance measurements)
 Cavity_pole = 18.041050536 Hz           ( -0.33% from pre-maintenance measurements)