After 4 locklosses at LOCKING_ALS (COMM and DIFF beatnotes at -18 and -15), at 18:05UTC I started an initial alinement. IA went smoothly and finished at 18:30UTC. Observing at 19:46UTC.  

NLN at 19:14UTC, I let SQZ_MANAGER try for 8 minutes but it kept failing at TRANSISION_IR_LOCKING, as yesterday 73770. Repeated yesterdays "Issues with SQZ FC Guardian" wiki steps and touched FC2 Pitch. Then had trouble with SQZ_FC  at ENGAGE_FC_ASC step. When Vicky stepped through the guardian this wasn't an issue and it locked fine, we then had the guardian do it and it locked fine. I touched SQZ OPO temperature and SQZ angle, high frequency SQZ looks bad but we are unsure why. 

FM2 DARM2 boost that was tuned on yesterday 73783, 73776 did not come on so I sdf reverted to turn it on. I'll search the alog to find where this needs to be added the ISC_LOCK. Tagging ISC. sdf

This bad high frequency noise was present in the start of most (but not all) of our locks since Tuesday, zoomed out plot. ZM6 alignment shifted Tuesday and is close to saturating. It is also moving a lot at the start of each lock, maybe causing this changing high frequency squeezing. We could repeat Naoki's 73171 offloading.

We can also see in the purple SQZ BLRMS (centered at 4.8kHz) jump at ~ 08:12UTC (1h40 into the lock) the DARM plot shows that the high frequency slowly gets better but at ~ 08:12UTC the noisy region at 4.8kHz and 3kHz suddenly disappears and is replaced by noise at 4kHz (compare purple/yellow traces to red). What would cause this?