[Takahashi, Hirata, Ikeda]

The results of the health check showed the TF from each TM actuator (H1~H4) to the Oplev signals (L, P, Y) were not consistent with the previous measurement. We checked if some points were rubbing or not. We did not find any rubbing points in the TM, IM, and IRM. To reject the effects due to the upper part, we fixed the TM and measured the TF. When we used the Diaggui script for the health check, the Oplev signals were saturated by the large actuation. We reduced the actuation by 1/10, the measured TFs were improved.