Starting at approx 5:30 UTC we are seeing an (small) increase in glitches on the control room glitchgram FOM (Figure 1). We think this is a symptom of the RF45 related issues again as we noticed a jump in the RF45 coherence FOM during one of these glitches.Right now, it seems much less damaging then the last episode.
See spectrograms (specifically feature at ~350 seconds in):
Strain: https://ldvw.ligo.caltech.edu/ldvw/view?act=getImg&imgId=108900
RF45: https://ldvw.ligo.caltech.edu/ldvw/view?act=getImg&imgId=108901
This time, the trend of LSC-MOD_RF45_AM_CTRL_OUT_DQ shows nothing strange (Figure 2).
The only reason I said the increase in glitches was 'small' is because I was comparing it to this.
It seemed to go away for ~40 mins but now it has returned again at ~6:32 UTC, looking pretty bad. I think Ed is going to try something.