ryan.crouch@LIGO.ORG - posted 04:05, Sunday 23 July 2023 - last comment - 10:55, Monday 24 July 2023(71624)
OPS Sunday owl midshift update
STATE of H1: Observing at 146Mpc
We've been locked for 9:20, no issues aside from another MY low temperature alarm.
Briefly dropped from Observing from 08:18:42 to 08:18:59 from an unknown issue, whatever SDF diff or grd node issue resolved itself before I could open the medms.
Using commands 'guardctrl log -a "07/23/2023 08:17 UTC" -b "07/23/2023 08:20 UTC" IFO' and 'guardctrl log -a "07/23/2023 08:17 UTC" -b "07/23/2023 08:20 UTC" DIAG_SDF' I can see that it was syscssqz that had 2 sdf diffs. Trended a in 71652 to see this was H1:SQZ-FIBR_SERVO_COMGAIN and H1:SQZ-FIBR_SERVO_FASTGAIN that changed from 20 to 17 and 15 back to 20 in ~0.3 seconds.
Oli also saw this 07/24 04:09UTC 71652, tagging SQZ, maybe we need to edit something or unmonitor these channels.