• BNS range 75-80 Mpc throughout. Winds up to 20 mph affect the range.
• Lots of long locks, including a 28 hour one.
• Oct 15: Robert turns off HVAC, BNS range increases by 5 Mpc, due mostly to improvement in 50-75 Hz region.  alog 22532
• Oct 15: Commissioning work from 15:00 - 23:00 UTC, switching bias on ETMY ESD, bracketed by suites of DARM OLTF, Pcal to DARM, measurements. The ESD actuation strength has decreased by 7-8%; model comparison looks very good. alog 22561
• Oct 17: Chris B turns on and off CW injection out of observing mode from 16:58 - 17:01 UTC . alog 22602
• Oct 17: Locked for almost the whole day, except for EQ. "No news is good news"!
• Large excitations at 10-20 Hz come and go...
  • eg, here, here.  
  • They are associated with excess non-stationary noise in 100-300 Hz band noted by Sheila on Oct 12 alog 22527 .
  • They are particularly bad on Oct 16 and Oct 19.  
  • The loudest Omicron glich is associated with one of the above-noted excitations: ldvw spectrogram, strain spectrogram
  • What is the origin of these dramatic events?
• FSCAN: Strong wandering lines at (~633Hz and ~1270Hz) come and go - present on 16th, absent on the 17th,  back after relock on 18th,  continuing through 19th.  Fscan data not available on 15th.
  • What is the origin of these wandering lines that are either present or absent in different lock stretches?
• Glitches
  • RF45 glitches still present in Hveto
  • SUS ETMY (60 Hz magnetic) glitches still present in Hveto 
  • BBH and BNS triggers rather peaceful. Loudest triggers show very little in the spectrograms.

More details in the Data Quality shift report, Oct 15-18, 2015