I ran BruCo on half a hour of data starting at GPS 1138960800. The full report is available here:
https://ldas-jobs.ligo.caltech.edu/~gabriele.vajente/bruco_1138960800/
Some interesting things:
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there's again significant coherence with DHARD_PIT at low frequencies. Maybe the P2L gains have changed again? It would be good to check if ETMY is again the culprit. If so, it might indicate something wrong with that suspension. Fig. 1
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SRCL and MICH seem far enough from the measured noise. Fig. 2
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some other angular degrees of freedom start to show (low) coherence, like CHARD_Y and SR2_Y. Fig. 3 and 4
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There is some (low) coherence at low frequency (mostly <15 Hz) with ISI-GND_STS_HAM5. Fig. 5
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The 1 Hz comb of lines is very well visible in many magnetometers, mostly PEM-EY_MAG_EBAY_SEIRACK. Fig. 6
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At the beam jitter periscope peaks, there is coherence with IMC degrees of freedom. Maybe it's time to optimze the IMC alignment. Fig. 7