travis.sadecki@LIGO.ORG - posted 08:11, Sunday 02 April 2017 - last comment - 15:15, Sunday 02 April 2017(35271)
Ops Day Shift Transition
TITLE: 04/02 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 61Mpc
OUTGOING OPERATOR: Jeff
CURRENT ENVIRONMENT:
Wind: 35mph Gusts, 30mph 5min avg
Primary useism: 0.15 μm/s
Secondary useism: 0.44 μm/s
QUICK SUMMARY: High winds are affecting our range a bit, but we have been locked for ~24 hours.
Looking at the summary pages, it looks like the range drop is coincident with increase in the 10-30 blrms motion at the corner station. I suspect the recent wind-related range drop/glitches are related to the 8-18 Hz input beam-tube vibration-related coupling that Robert and co. showed recently. This is probably not surprising to most, but I just wanted to suggest this explicitly since wind wasn't mentioned in Robert's alog. Hopefully fixing that problem will also fix wind-range coupling.