ryan.short@LIGO.ORG - posted 07:41, Friday 24 January 2025 - last comment - 08:49, Friday 24 January 2025(82438)
Ops Day Shift Start
TITLE: 01/24 Day Shift: 1530-0030 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Lock Acquisition
OUTGOING OPERATOR: TJ
CURRENT ENVIRONMENT:
SEI_ENV state: CALM
Wind: 3mph Gusts, 1mph 3min avg
Primary useism: 0.02 μm/s
Secondary useism: 0.18 μm/s
QUICK SUMMARY: H1 lost lock just a half hour ago at 15:09 from a not obvious cause (link to lockloss tool) and is relocking; just reached DRMI.
- Wind low, microseism steady just above 50th percentile
H1 back to observing at 16:45 UTC. Had to help PRM during DRMI locking, but otherwise this was an automatic relock.
I updated OMC-LSC_PHASEROT from -21 to 56 since TJ pointed out in his alog from last night and accepted it in both SAFE and OBSERVE SDF tables (screenshots attached). Since the OMC was already locked by the time I did this, I just used the command from alog82430, which worked and did not cause a lockloss. This is possibly why the calibration overnight looked strange.