J. Kissel
#BelatedALOG

We grabbed a sensing function measurement last Wednesday, 2022-05-25. 

The IFO was in the state described in the "3rd" nominal low noise segment of LHO:63284 i.e. 
   - not yet switched over back to all EX actuation as in LHO:63363, and 
   - EY's L2A filters were still on LHO:63274), 
which may play a role in interpreting the low-frequency end of the processed results (i.e. there may be L2A2L cross-coupling that may confuse any statements about detuning.)

The data were taken after allowing the ADS loops to converge (error signals less than +/-0.05 [ct]), with a hand-installed higher gain (that I think has since been put into lsc_params parameter list of ISC_LOCK of guardian), which took quite a while, so the IFO had been at 50W (PSL input) for at least an hour, and we imagine, thermally stable.

The measurement files have been committed to the repo here:
     /ligo/svncommon/CalSVN/aligocalibration/trunk/Runs/O3/H1/Measurements/FullIFOSensingTFs/
          2022-05-25_H1_DARM_OLGTF_LF_SS_5to1100Hz_15min.xml
          2022-05-25_H1_PCAL2DARMTF_LF_SS_5to1100Hz_10min.xml
          2022-05-25_H1_OMCDCPDSUM_to_DARMIN1.xml

I'm working through creating a new style pyDARM parameter file, then learning how to use the new version of pyDARM, and I'll post processed results when done (see a start in LHO:63334).