I made a quick plot of low noise % vs wind speed for O4a and thought it was interesting enough to share. This is by no means an analysis, just a quick look. Someone should probably do something similar to what Laurence and Sheila made for O3 for O4a (alog49682), but that someone is not me at the moment. Unlike on Figure 6 of Sheila's similar ER7 plot (T1500368), there isn't a clear drop off at a particular speed. This could be due to directional impacts and the wind fence, or a plethora of other factors. Figure 19 on this paper (<a href="https://dcc.ligo.org/DocDB/0150/P1800038/005/BRSLIGOCQG.pdf">P1800038</a> is again similar with O1 and O2 data, but in m/s. I'm very curious about looking around times of lock losses or failed acquisitions, but I'm not making promises if I'll ever get to those.

This is minute trends of the max wind, binned in integers, then taking the percent of time we were in ISC_LOCK states of >=600.