I took a quick look at six hours of 30-minute SFTs automatically
created by FScans this morning (thanks for setting the intent bit!),
to see if recent line mitigation attempts have reduced the amplitude
of the 1-Hz and other combs at low frequencies. Unfortunately, 
the low-frequency noise floor is too elevated to say much yet
about that mitigation success, but in the band 28-32 Hz, where
last night's noise is lower, there do seem to be fewer and lower-level
lines, including reduced amplitudes for the 1-Hz comb with a ~0.25-Hz offset.

Please note that the 56.84-Hz comb reported in the ER9 data
(present but weaker in O1 data)  remains quite strong.
There are other strong lines present, too, but I gather noise-hunting
is just getting started. The 56.84-Hz comb suggests a DAQ problem
somewhere, as noted before.

The attached plots show different bands of O1 data (narrow black curves)
superposed on last night's data (broad red swath). In each case, an 
inverse-noise weighting is used, to suppress periods of elevated noise.

Figure 1 - 10-2000 Hz
Figure 2 - 10-28 Hz
Figure 3 - 28-32 Hz
Figure 4 - 32-50 Hz
Figure 5 - 50-100 Hz
Figure 6 - 100-200 Hz
Figure 7 - 200-1000 Hz
Figure 8 - 1000-2000 Hz