1. MICH control signal became larger when the micro seismic motion became large
Fig.1. showed the MICH related signal for the higher seismic motion (BLRMS(0.1 - 0.3 Hz)~1.0, 18th Nov. 00:00:00)
Fig.2. showed the MICH related signal for the lower seismic motion (BLRMS(0.1 - 0.3 Hz)~0.1, 15th Nov. 21:00:00)
As you can see, the MICH control signal would be twice.
2. Glitch like signal in the ITMX MN V1-V2
Fig.3. showed the some glitches in the ITMX MN COILOUTF V1-V3.
There is several coincidence when the ITMX MN WIT R became larger number.
(Also in LSC REFL PDA3 RF45 I ?)
3. Saturation of the POP PDA1 RF45 I signal.
Fig.4.
In several lock loss, the trigger would be the saturation of the PRCL error signal (POP PDA1 RF45 I signal), but I still not understand why the drift and saturation of the POP PDA1 RF45 I.
After finishing the investigation of the lock loss, I will post the report again
