J. Kissel

Now armed with a set of DARM loop model parameters that accurately predict the DARM Open Loop Gain transfer function (see LHO aLOG 45726), we can update the reference model values at calibration line frequencies, colloquially referred to as simply the "EPICS records" by the CAL team. These facilitate the calculation of time-dependent correction factors (see T1700106). I've also made sure that all demodulating oscillators are on, running, and at the correct amplitude.

For consumption by the GDS and SLM tool team who need these values as well, I've committed these new records to 
    /ligo/svncommon/CalSVN/aligocalibration/trunk/Runs/O3/H1/Results/CALCS_FE/epicsrecords_H1_20181205.txt
and attach them here for convenience.

I've generated these EPICS records with the following model parameter set,
    /ligo/svncommon/CalSVN/aligocalibration/trunk/Runs/O3/H1/params/modelparams_H1_20181205.py
and the following script
    /ligo/svncommon/CalSVN/aligocalibration/trunk/Runs/O3/H1/Scripts/CALCS_FE/createEPICS_for_20181205.py

I'm a little bit nervous about the systematic error in these EPICs records, namely:
    (1) We haven't updated the sensing function "ERR" filter, so we're still using the 2018-10-04 model for the sensing function.
    (2) We haven't updated the actuator replica chain to match the updated actuation strength for the ESD after the bias reduction, but maybe we might be getting away with it, because the replica L3 / TST DRIVE_ALIGN gain is still set at -40, when the real thing is -80, and the actuator strength is still the 4.505e-12 N/ct when the real thing is 2.294e-12. 
    (3) The whole system hasn't worked since the upgrade to split kappa_PU into kappa_P and kappa_U. # details
but we'll see.