Heather, Vaishali, Evan, Kiwamu, Jeff B.
DQ shifter: Beverly

During her DQ shift, Beverly noticed excess noise in the SUS bounce/roll modes beginning at Feb 22 13:00 UTC onward, and asked if it might be correlated to the ground motion (see Beverly's Wed Feb 22 DQ shift summary and attached Feb 22 plots). There was indeed a large gust of wind that hit LHO at around 13:00 UTC, as well as a degradation in alignment in the YAW degree of freedom, where the YAW signal was about 0.7 above the reference line (this degradation would also add to low frequency noise). The reason for the excess noise was suspected to be a combination of both, so Jeff made adjustments to the A2L, after which we see that the amplitude of bounce/roll modes have dropped off at around Feb 23 01:00 UTC (or Feb 22 17:00 PST), which is when we ran the A2L (see attached Feb 23 plots).

Beverly's alog entry for her DQ shift can be found here: 34364