On Friday I took two sets of BBSS M1 OLG measurements - the first measurement (blue (/cyan)) had damping ON for M1, but damping OFF for M2 and M3 (aka M3->M2 damping OFF, aka no actuation on M2 or M3). The second measurement (red (/pink)) had damping ON for M1 as well as damping ON for M3->M2 (aka actuation on M2, aka nominal in ALIGNED).

The only difference I really see between the two sets of measurements is in Yaw. Without the M3->M2 damping, there is an extra peak 0.4 - 0.6 Hz, but turning M3->M2 damping ON completely removes that.

Settings:
- In HEALTH_CHECK
- M1 DAMP ON
- SEI_BS FULLY_ISOLATED
- SEI_ENV CALM

M1 DAMP ON, M3->M2 DAMP OFF
(2026-09-25 ~17:30 UTC)
Data:
/ligo/svncommon/SusSVN/sus/trunk/BBSS/H1/BS/SAGM1/Data/2026-09-25_1730_H1SUSBS_M1_CDBIOState1_WhiteNoise_{L,T,V,R,P,Y}_0p02to50Hz_OLGTF.xml
r13182

M1 DAMP ON, M3->M2 DAMP ON
(2026-09-25 ~18:25 UTC)
Additional Settings:
- M3->M2 DAMP ON
    - M3 OSEM signals go up to M2 and M2 is actuated on to damp
    - 'OLDAMP' bank
Data:
/ligo/svncommon/SusSVN/sus/trunk/BBSS/H1/BS/SAGM1/Data/2026-09-25_1825_H1SUSBS_M1_CDBIOState1_M3toM2dampON_WhiteNoise_{L,T,V,R,P,Y}_0p02to50Hz_OLGTF.xml
r13184