J. Kissel

No explorative measurements today -- just a quick, standard, 30 minute check-in with the sensing function. Data and analysis to come.
/ligo/svncommon/CalSVN/aligocalibration/trunk/Runs/O3/H1/Measurements/FullIFOSensingTFs/
    2020-01-09_H1_DARM_OLGTF_LF_SS_5to1100Hz_15min.xml
    2020-01-09_H1_PCALY2DARMTF_LF_SS_5t1100Hz_10min.xml

    2020-01-09_H1_PCALY2DARMTF_BB_3min.xml

Plan to install a new front-end calibration model on Monday, 01/13, so this data set will be processed and included in the presentation materials of that data.
Among the improvements will be to 
 - rid the DELTAL_EXTERNAL / PCAL transfer function (which is representative of the systematic error in the calibration) of the sharp feature at 150 Hz due to previously poor models of the UIM dynamics -- see G2000037. (~3% improvment at 150 Hz, 0.5 % improvement between 10 - 100 Hz.)
 - update the sensing function to better match the current 38W IFO (instead of the 2019-09-09 model, which used data from the O3A 36W IFO). (~0.5 % improvement above ~30 Hz)
 - update to correctly model the O3 ETMX test mass' mass (we've been using the O2 test mass' mass since ... well O2, even though we've replaced the mass) (~0.1% improvement between 20 Hz and 100 Hz.)