Following up from 90723 we (roughly) calculated the BS top mass drive (cts) to bottom mass motion (urad) measured by the oplev. This will allow to (re)calibrate the top mass sliders in physical units. The screenshot attached show the ndscope used for this calculation. The data was taken before the sign convention was corrected (90725), so the signs were flipped from the ndscope in the table below: 

The slider calibrations to implement (at next opportunity) in the gain of the slider filterbanks are : 

P calibration = 1/0.15 = 6.6 [P_cts/P_urad] 
Y calibration = 1/0.35 = 0.6 [Y_cts/Y_urad]