Gabriele suggested that we rerun Sheila's DARM comparison scripts (76768) to look at time from last night. I used the instructions that Sheila wrote in LHO:76768.

The two times I used are from Gabriele's DARM comparison (listed below), however I just used 600s segments instead of the full 3600s. Also, these plots compare DELTAL_EXTERNAL since we were having nds issues on-site and couldn't fetch GDS-CALIB_STRAIN for a few hours.

O4a GPS 1389058533
ER16 (last night) GPS 1396241443

Attachments:

comparison.png: DARM comparison shared by Gabriele in Mattermost showing that we are almost back down to the O4a level of noise near 100Hz.

compare_darm_spectra.pdf: DARM spectra comparison showing that we're currently pretty much right at late O4a noise levels above 70Hz. Our noise is better from about 18Hz to about 33Hz but our noise floor is higher now 50-70Hz.


compare_darm_range_integrand.pdf: BNS range integrand comparison

compare_cumulative_range.pdf: comparison of the cumulative range at both GPS times. BNS range is matched between the two times below about 18Hz and right at 150Hz (by eye). If I'm interpreting this plot correctly, we're doing better than late O4a now between 20 & 70Hz but slightly worse everywhere else. After talking to Sheila about how to interpret this plot: we are doing better from 20Hz to around 35Hz, then losing range 35Hz to ~70Hz. The improvements are likely from the new DARM offloading but those improvements are being negatively affected by other low frequency noise we're still trying to figure out.