Observing at 79Mpc.
Winds began to pick up a bit during alignment, but has since dropped back down to 20mph or below. Jim W wanted to change the blends for the end stations in the direction of the winds to the Quite_90s. So we did and seems to have worked well so far.
We have changed the blends for ETMX Y and ETMY X to the Quite_90 from the 45mHz.
We are hoping that this addresses the 40mhz ring up that ETMX sees when winds are moderate (~20-30 mph) and useism is higher (.5 micron or more) and we have to used 45mhz blends in the beam direction (i.e. X for ETMX, Y for ETMY). So far we have only tried this on the end stations, we may want to do this on the corner station BSC's as well, I don't know.
I switched ETMY at 19:25 UTC, ETMX at 19:27 UTC.
Attached is a plot of the time series of EX stage 1 motion from last lockloss. The oscillation shows up mostly in X.