TITLE: 01/10 Owl Shift: 08:00-16:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: EQ, maintenance day
INCOMING OPERATOR: Nutsinee?
CURRENT ENVIRONMENT:
Wind: 11mph Gusts, 10mph 5min avg
Primary useism: 0.24 μm/s
Secondary useism: 0.41 μm/s
QUICK SUMMARY:
I had problems with PI modes 27 & 28 all night, they needed constant attention. 27 broke lock once, and when I got back up, looking at spectra showed that the modes that were ringing up were outside the mode 27 bandpass filter, so I switched from FM5 (18036.5 hz) to FM4(18040 hz), and could at least control the PI for the rest of the night, but it needed frequent tweaks to the PLL phase.
Maintenance has started, Peter headed out to the PSL after an EQ knocked us out, Krishna has started a software upgrade to the BRSs.