I've made a comparison of the 1st vs the 2nd BBSS M1 satamp whitening modifications(see 92051 for timeline). Unfortunately there is a small difference (besides the whitening of course) between the environmental configurations - the second time (for the 2nd mod configuration) was during a time when SEI_ENV was in MAINTENANCE, which slightly raises the noise we see at lower frequencies. Eventually we'll be able to get the correct adc configurations on these plots so we can see where those would lie. Hopefully by then we will also have a better second time where we are in nominal SE_ENV conditions.

I had to get two different sets of loop suppression for each whitening configuration. The OLG measurement dates used for each measurement are listed and shown in the individual plots.

Results:
/ligo/svncommon/SusSVN/sus/trunk/BBSS/H1/BS/SAGM1/Results/2026-09-29_allDampRegressCompare_H1SUSBS_M1_NoiseComparison_1469227619vs1473639115-1200.pdf
r13183

Data:
/ligo/svncommon/SusSVN/sus/trunk/BBSS/H1/BS/SAGM1/Data/2026-07-27_dampRegress_H1SUSBS_M1_1469227619_1200.mat
/ligo/svncommon/SusSVN/sus/trunk/BBSS/H1/BS/SAGM1/Data/2026-09-17_dampRegress_H1SUSBS_M1_1473639115_1200.mat
r13182