oli.patane@LIGO.ORG - posted 07:38, Wednesday 18 September 2024 - last comment - 15:42, Wednesday 18 September 2024(80160)
Ops Day Shift Start
TITLE: 09/18 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Lock Acquisition
OUTGOING OPERATOR: Ibrahim
CURRENT ENVIRONMENT:
SEI_ENV state: CALM
Wind: 5mph Gusts, 3mph 3min avg
Primary useism: 0.01 μm/s
Secondary useism: 0.08 μm/s
QUICK SUMMARY:
Relocking and at CARM_5_PICOMETERS. Not sure yet why we lost lock, but it might've been an earthquake.
Lockloss from earlier this morning, 2024-09-18 13:39UTC, wasn't caused by an earthquake, but by the FSS saturating. This is the first FSS_OSCILLATION lockloss that we've had from NLN in a year
Back to Observing 15:09UTC.
Had to accept this sdf diff for ETMX_L3_ESDOUTF_LR to get into Observing. This change happened during TRANSITION_FROM_ETMX. Since this is our first relock since the DAC was changed out yesterday at EX, wondering if this was related at all to those changes.
I probably had a stray mouse click that turned that decimation filter off, and then did my SDF-accepting of the state of FMs 9 and 10 of the ESDOUTF filter banks. Thankfully it was just the decimation filter that I had wrong, which doesn't affect our sensitivity in any way.
Anyhow, I have updated the safe.snap file to accept the decimation filter being correctly ON (see attached). This will show up as an SDF diff again (opposite of what Oli posted this morning) in Observe and should be accepted. I don't want to set it in Observe right now, since accepting would require changing other things with the ETM, which I don't want to do right now. So, it'll stay as a diff.
SDF accepted in Observe