TITLE: 10/21 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Lock Acquisition
INCOMING OPERATOR: Corey
SHIFT SUMMARY: Spent most of the shift continuing to try and recover alignments from the dolphin glitch at 8:05UTC. Currently waiting for ADS to converge to go into observing.

I had lots of issues to start in the morning, ALS_X would lose lock for no apparent reason or its WFS would oscilate too hard and kill its lock, then Diff_IR kept being "not really found" then PRMI buildups were very unstable and we couldn't get good enough flashes to get DRMI. I tried an IA, and then moving SR3 and PR3 based on their OPLEVS to where they were before the dolphin glitch, adjusting SR3 made PRMI better and PR3 made it worse.

I ended up trying to a full slider restore to a time when we were locking for the lock that was killed by the computer crashes (10/19 18:09UTC), still no luck getting PRMI or DRMI. I was considering doing another IA or restoring the sliders to after Camilla's IA this morning, after calling and talking with Jenne I did an initial alignment and not another restore. After this IA we went back up to NLN without any interventions, I stepped slowly through the states just in case. The violins had rung up a bit, but they damped down pretty quickly and weren't much of a hinderance.

Once I got to NLN, the SQZ manager had the notification "SQZ ASC AS42 not on?" So I went to RESET_SQZ_ASC then back to FREQ_DEP_SQZ following Vickys instructions in alog71083. While waiting for the ADS to converge I went through the large amout of SDF diffs for BOS and OAF from 8:50UTC which looked to be when Dave restarted their models, I reverted almost all of them after talking to Jenne (they were all COEFF) except for 1 in BOS. Naoki also hopped on to optimize the squeezing before we went back into observing, I optimized the OPO temperature when he was done and accepted it in SDF then went into observing at 20:49UTC.

Lockloss at 21:22UTC

Lost lock during PRMI_ASC from Yarm losing lock. PRMI keeps locking then losing it seconds later, flashes were super low. Tried CHECK_MICH after a few PRMIs. I trended PRM, PR3, SR3, and the BS to see if anything had moved since the LL, I ended up adjusting PR3 in yaw by .2 (155.5 ->155.3) since it looked like it drifted a little bit and then the flashes looked much better. Not sure why it moved? I also had to tap PRM a little but in pitch (2 microradians, -1502.4 -> -1504.4) and it caught PRMI then DRMI. Guardian brought us up the rest of the way no problem.

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