Comparison overnight spectra of the BBSS's M1 LF/RT and M2 UL/UR osems before vs after the installation of the BRDs is showing that the BRDs are correctly damping the Bounce and Roll modes and so don't need to be adjusted.

Bounce and Roll frequencies (measured before installing BRDs) were at 19.80 Hz for Bounce and 32.09 Hz for Roll. Final measurements will be taken in chamber.

No BRDs
- Brighter colors
- Overnight measurement taken over >14 hours
- Starting time: 2026-05-20 00:08:45 UTC

With BRDs
- Darker colors
- Overnight measurement taken over >14 hours
- Starting time: 2026-05-21 00:16:54 UTC

The data file I used for this can be found in  /ligo/svncommon/SusSVN/sus/trunk/BBSS/H1/BS/Common/Data/2026-05-21_1900_H1SUSBS_M1M2_BounceRoll_NoBRDs_vs_BRDs.xml as r13015.