J. Kissel

Since we've finalized our initial alignment settings to match the new global alignment with test mass spot positions set for 37W (LHO aLOG 50967), Jenne did a touch-up of the OMC ASC's QPD offsets in order to recover some optical gain (see LHO aLOG 50973). Since we have a new "more physical" shape to sensing function / optical plant in this new global alignment location (as reported in this morning's measurement LHO aLOG 50966), I wanted to get a further set of full sweeps to confirm these changes (since they'll also now be permanent). 

Attached are the results, and comparison between the this morning's pre-tuned OMC ASC, and post-tuned OMC ASC. As with all other tests of IFO parameter change (a previous spot-position move test, and an temporary 1.5x increase of DHARD PIT or YAW gains), we see that the low frequency feature only changes in the DARM Open Loop Gain transfer function, and the PCAL2DARMIN1 transfer function does not report it.

Raw data templates 
/ligo/svncommon/CalSVN/aligocalibration/trunk/Runs/O3/H1/Measurements/FullIFOSensingTFs/
    2019-08-01_H1_OMCASCOffsetTuneUp_DARM_OLGTF_LF_SS_5to1100Hz_15min.xml
    2019-08-01_H1_OMCASCOffsetTuneUp_PCALY2DARMTF_LF_SS_5t1100Hz_10min.xml
    2019-08-01_H1_OMCASCOffsetTuneUp_PCALY2DARMTF_BB.xml

Processing script 
/ligo/svncommon/CalSVN/aligocalibration/trunk/Runs/O3/H1/Scripts/FullIFOSensingTFs/
    process_sensingmeas_20190801_OMCASCOffsetTuneUp.py
    process_sensingmeas_collection_20190801_omcasctuneup.py