TITLE: 06/25 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 145Mpc
OUTGOING OPERATOR: TJ
CURRENT ENVIRONMENT:
SEI_ENV state: CALM
Wind: 5mph Gusts, 2mph 3min avg
Primary useism: 0.01 μm/s
Secondary useism: 0.06 μm/s
QUICK SUMMARY:
Observing and have been Locked for almost 2.5 hours. Range is okay at 145Mpc, it looks like its been drifting a bit down since the lock started.
Looking at the lockloss from last night (2025-06-25 11:02 UTC - note that the 'refined lockloss time' is one whole second early than the actual lockloss time), it's immediately clear that we lost lock due to a quick ringup, but it is unclear where that ringup came from or what frequency it was actually at. We can see an 8Hz oscillation in DARM one second before the lockloss, but looking at the LSC channels, SRCL sees a 1.5 Hz oscillation right before the lockloss, and PRCL has a 4.5 Hz oscillation (although the PRCL oscillation could be unrelated, although it does look like it grows a bit larger). In the ASC channels, MICH P OUT has a ringup at ~3.8 Hz in that last second, and some of the other ASC channels look like they maybe also have some sort of excursion right before the lockloss.