Both of our locks since today's maintence period have had large glitches at low frequency.  In the first lock we also had a reappearance of the 1083Hz OMC length glitches (and the corresponding peak in our spectrum).

The OMC length feature coming back may be due to more low frqeuency motion of the interferometer because BRSY is not in use, https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=33978

I added a boost to the OMC length loop to keep it on resonance better, measurements attached.  This seemed to help the 1083 Hz peak.  I turned the boost off from 4:14 UTC to 4:21 UTC Feb 8th UTC

If we want to make this boost permanent we should rearrange filters in OMC-LSC_SERVO and update the OMC guardian.  For now I have put it in OMC-LSC_I_SWSTAT FM3.  Travis accepted this in SDF, and has gone back to observing.  This data may be ususable because of the huge glitches. 

Operators: If you have to relock later tonight, you can engage the boost for the OMC by turning on FM3 in OMC-LSC_I (you can find this under OMC> CONTROL> green button saying I in the center near the top).