J. Kissel

I've processed the measurements of the ETMX actuation strength during both the nominal IFO conditions (namely, the ETMY spot position was -15.7mm PIT, +13.2mm YAW of center) and when the ETMY spot position was moved toward center (-6.1mm PIT, +0.0mm YAW). 
As mentioned earlier in several spoilers, the reported actuator strength (as a function of frequency) is the same, regardless of ETMY spot position. We had no expectation it would, this is merely quantitive proof to complete the story.
This closes out the analysis of all the data taken while moving the ETMY spot position a few weeks ago (see LHO aLOG 50382), and complements the analysis of the sensing function under spot move here LHO aLOG 50498.

Attached are a collection of three plots for each the PUM and TST stages:
    Page (1): Comparing the two measurements against the full 2019-04-16 reference model 
    Page (2): Dividing out the reference model, to just look at the remaining actuation strength in Newtons/(CAL EXC point ct)
    Page (3): Each raw measurement that went in to calculating the above.

Note, we didn't measure the UIM because (a) we also didn't expect it to change, and (b) it would have taken than much longer, and we were already pushing our allotted measurement time that week.

This data was processed with the following script:
/ligo/svncommon/CalSVN/aligocalibration/trunk/Runs/O3/H1/Scripts/FullIFOActuationTFs/
    process_actuationmeas_collection_20190717_spotmove.py
along with rev 8036 of
/ligo/svncommon/CalSVN/aligocalibration/trunk/Common/pyDARM/src/
    actuation.py