CAL group
We did the calibration measurements and updated the parameters.

Estimated parameters in the Pre-maintenance measurements are as follows.
H_etmxtm = 3.235833627e-14 @10Hz ( -0.42% from previous measurements)
H_etmxim = 9.563757544e-15 @10Hz ( -1.31% from previous measurements)
Optical_gain = 3.726146467e+12 ( 23.03% from previous measurements)
Cavity_pole = 16.877398235 Hz ( 1.64% from previous measurements)

This time, a modification to K1LSC-OMC_DC FB was applied to the calibration parameters.
In this FB, a gain of 0.8 had previously been input, but its effect was moved to FM3 yesterday.
In the reconstruction, the gain is included in the optical gain part, while the FMs are included in the filter part.
Therefore, in order to adapt to this FB change, the reconstruction filter was modified.
As a result, the optical gain value increased by ~2 dB compared to the previous (yesterday’s) value.
However, this operation does not change the combined response of the filter and optical gain (there is a slight difference between yesterday’s and today’s measurements).

Previous values are listed in klog#36224.