In preparation of acceptance documentation, top mass PR2 transfer functions for phase 3b (in vacuum) have been measured during the night of August 5th 2013. Plots comparing model and previous measurements are attached below

(1) H1 undamped M1-M1 top mass transfer functions (in red) against hsts model (in blue)

(2) H1 damped M1-M1 top mass transfer functions (in red) against hsts model (in blue) 

(3) H1 PR2 undamped phase 3a (pink) (in air, in chamber april 2013 ), H1 PR2 undamped phase 3b (cyan) (in vacuum, August 2013), L1 PR2 undamped phase 3a (orange) (in air June 2013)

Measurements are showing good agreement with previous data from LHO. Cross coupling in pitch is still present