TITLE: 07/07 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Lock Acquisition
OUTGOING OPERATOR: Tony
CURRENT ENVIRONMENT:
SEI_ENV state: CALM
Wind: 12mph Gusts, 4mph 3min avg
Primary useism: 0.02 μm/s
Secondary useism: 0.06 μm/s
QUICK SUMMARY: H1 just lost lock after a couple hours of being locked, so starting relocking now.
Lockloss @ 23:14 UTC after almost 2.5 hrs locked - link to lockloss tool
No obvious cause.
H1 back to observing at 00:46 UTC. Automatic relock except for a small adjustment to FC2 pitch was needed to lock the filter cavity.
I also ran a 'SCAN_SQZANG_FDS' once at low noise to improve the SQZ angle, which helped bring the BNS range up to about 142Mpc, but not quite back to the 150Mpc we were hoping for. Perhaps a SQZ alignment scan would've helped too, but I did not take the time to do that here.