DQ shifter : Young-Min Kim

Link to the DQ Shift Report

Summary of DQ shift report during 28 Aug 2023 - 3 Sep 2023

• duty cycle : 58.24 %, 52.06%, 50.23 %, 85.28, 78.22 %, 86.01, 85.81 % == avg. 70.85 % in observing state
• First 3 days : windy, EQs, and SQZ issues, observing state is less then 60%
• last 4 days : good observing state (4-day avg. 83.83%). some ground motion at 0.03-0.1Hz, 0.3-1Hz
• On Wed. Aug 30, a bunch of loud glitches at 10-20Hz due to squeezer issue.
• On Thu. Aug 31, Fscan - line count was too high (>700), and touched alert threshold.
• Sep 1 and Sep 2, PI 24 rung up and lockloss - alog 72619, alog 72636
• Ground Motion from High Winds in Higher Frequency Bands by Ryan Short - alog 72540
• Hveto
  • first 2 days (Mon., Tue), PEM-EX_VMON_ETMX_ESDPOWER48_DQ vetoed some loud glitches, related to range drops.
  • last 5 days, ASC-DHARD_Y_OUT_DQ vetoed some loud glitches, related to range drops.
  • SUS ETMY L3 OPLEV PIT/YAW vetoed 20-60Hz (mostly 40-50Hz) glitches, snr ~< 10
• 102 Hz line mitigation - on Tue. Aug29, Gabriele and Elenna removed the high Q zero/pole pair - alog 72537
• some lines - not loud, sometimes faint, it seems not serious, but care about it - trying to follwo up
  • ~29Hz since Aug 29.
  • faint lines since Sep 1 : ~13Hz, ~52Hz, ~120Hz