[Jenne, Terra, Koji]
We are leaving the IFO in Observing mode (intent bit set), so that the analysis teams can check their pipelines. Should be Undisturbed since about 07:48:00UTC. We did not do the Coil Drivers state, but that isn't our current noise limit (it's the usual ASC and A2L at low freqs, and then what looks like intensity noise at higher freqs).
OMC whitening cannot be turned on - I speculate that it's the too-high 2nd order violin modes causing the saturations. We are not currently damping any 2nd order modes.
Checking coherence of some LSC/ASC channels with regard to DARM.
LSC:
- PRCL has high coherence around the peak structure at 350Hz.
- MICH has several freqs below 40Hz to have 0.4~0.5 coherence.
ASC:
- DHARD_P is dominant between 27 to 40Hz. It also has high coherence (~0.7) between 8~13Hz
- CHARD_Y is dominant between 10 to 27Hz.
- SRC2_Y has coherence of ~0.5 between 8~13Hz.
- INP1_P is dominant at 15-20Hz.