TITLE: 11/29 Eve Shift: 00:00-08:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Preventive Maintenance
OUTGOING OPERATOR: Ibrahim
CURRENT ENVIRONMENT:
SEI_ENV state: CALM
Wind: 2mph Gusts, 1mph 5min avg
Primary useism: 0.02 μm/s
Secondary useism: 0.23 μm/s
QUICK SUMMARY:
H1 is relocking following maintenance day, currently up to TRANSITION_FROM_ETMX. The PRG trace is noisier than usual, but otherwise things look okay.
H1 is back to observing as of 00:22 UTC.
I had to deal with one SDF diff in the CS_ISC table for the H1:ALS-C_DIFF_PLL_VCOCOMP channel. Trending it back, it seems to have been turned OFF last Tuesday during maintenance (ISC_LOCK in 'IDLE') and back ON earlier this afternoon at 20:46 UTC, during the "Beckhoff work" section of Ibrahim's day shift log. Prior to it being switched OFF last week, it had been ON for about 8.5 years, or pre-O1. So, I ACCEPTED this diff.