Some really nice stretches of observing, thanks LHO! Here are some observations:
- It looks like it's taking a while (~30mins) for noise at certain frequencies to settle once the ifo is locked. Looking at spectrograms there are noise lines around 20-30 Hz, 500 Hz (violin modes), 1000 Hz (harmonics), and broadband noise above 1000 Hz and especially at 5000Hz (laser frequency noise 4-4.5kHz (alog)?).
- PyCBC (e.g. this link) seems to be most affected by random glitches and scattering
- On Sunday the range seems to have a bit of a cyclic trend to it, on the order of 7 hours to go from 130 Mpc, down to 120Mpc and back again. Lasso doesn't show any obvious correlations
- Overflows from ETMX are causing really loud glitches in CALIB-STRAIN. There were 13 of these glitches on sunday. The OMC also seems to be overflowing a decent amount (39 instances of FEC-10_ADC_OVERFLOW_ACC_2_26 on sunday) but these are not showing up in CALIB STRAIN
The full DQ shift can be found at: https://wiki.ligo.org/DetChar/DataQuality/DQShiftLHO20230424