I made some plots to get a sense of how wind and microseism are affecting our duty cycle so far in O1. The first plot is a histogram of duty cycle vs percentiles of wind/microseism. The second plot is a timeseries that shows the microseism and wind plotted for all of O1 (until Oct 31 00:00 UTC) with the percentiles of each superimposed and locked segments along the bottom. All data are minute trend maximums. I used the flag H1:DMT-DC_READOUT_LOCKED for the locked state.
Comparing with long term wind / microseism statistics:
8-year wind study from Margarita: https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=12996
Long term study of the seismic environment: P040015
Below I have included a table of actual values for each percentile. The 8 year study of wind has higher values (I inferred the 8-year percentiles from the first plot in Margarita's aLog). Note that the 8 year study used hourly max trend data as opposed to minute trends. Also, keep in mind Margarita's study has already shown that historically September / October are less windy then spring/summer months.
The long term microseism numbers (taken from fig. 5 of the paper) agree more closely with O1 results so far.
| Percentile | O1 Wind [MPH] | Eight Year Wind [MPH] | O1 Microseism [nm/s] | Long Term Microseism [nm/s] |
| 50 | 6 | 11 | 255 | 200 |
| 70 | 10 | 15 | 359 | 300 |
| 80 | 13 | 20 | 442 | 400 |
| 90 | 16 | 25 | 555 | 550 |
| 95 | 21 | 30 | 650 | 700 |
The code used to generate these plots is located here: https://ldas-jobs.ligo-wa.caltech.edu/~jordan.palamos/duty_cycle/
