I ran Bruco on two times around excess noises as Andy's suggestion.
Oct 24, 12:40:00 UTC : https://ldas-jobs.ligo-wa.caltech.edu/~youngmin/BruCo/PRE-ER10/H1/Oct24/H1-1161348017-600/
Oct 24, 15:45:00 UTC : https://ldas-jobs.ligo-wa.caltech.edu/~youngmin/BruCo/PRE-ER10/H1/Oct24/H1-1161359117-600/
The first time is right after Range Drop which Stefan mentioned (https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=30790).
For the comparison, the bruco scan on nominal state around 70Mpc is here (https://ldas-jobs.ligo-wa.caltech.edu/~youngmin/BruCo/PRE-ER10/H1/Oct24/H1-1161342497-600/)
It's not easy for me to find a specific channel to look at, therefore,
Any comments/suggestions on what I should look at and/or any further analysis are welcome.
Thanks-
This shows that we have ASC noise below 30 Hz, and that perhaps the A2L for ITMY was not tuned well at the end of the lock: ITMY_L3_ISCINF_P
SRCL noise is high from 15-50 Hz, we will attempt to make a better feedforward filter soon for this (This is also the conculsion of some quick noise injections this morning.)
PRCL coherence is high both where the SRCL coherence is high and at the jitter peaks, which could be coupling through SRCL or frequency noise lock point errors.
PSL channels that have good whitening show coherence around our high frequency lump. (OSC PD INT ISS PDB)
There are a few channels that I think could be added to the excluded list:
SUS-ETMY_L2_FASTIMON_LL_OUT_DQ
OMC-PI_DCPD_64KHZ_AHF_DQ
OMC-DCPD_NULL_OUT_DQ
Looking at the frequency range of interest (mainly 50 - 200 Hz), there isn't any coherence with significant channels. This is not unexpected if the noise is due to scattering, since it would be a highly non linear coupling, thus not seen with a coherence analysis.