J. Kissel, S. Dwyer, T. Shaffer

TJ was diligently running at regularly scheduled calibration measurement suite with the current nominal configuration of the IFO. Sheila and I got too excited about what other measurements we needed to do during the commissioning period today, and I quickly and boldly made the assessment that the simulines sweeps were done by just looking at the front wall DARM FOM. And said "we can go ahead with the first [commissioning] measurements" and changed the SRCL offset to grab an augmented IFO configuration sweep as planned. We realized only ~2 mins after that the nominal configuration sweep *was* still going, and this is me eating my hat. Sorry team.

TJ killed the simulines session, which apparently automatically cleans up the calibration sweep measurement report infrastructure, so there's no evidence of it.
So, today's regular calibration has been spoiled.

The broadband injection in the nominal configuration did go forward to completion, that's
    /ligo/groups/cal/H1/measurements/PCALY2DARM_BB/
        PCALY2DARM_BB_20250327T153021Z.xml
The "nominal" configuration -- compared to what we want to change today:
    Filter Cavity Detuning = -34 Hz offset
    SRCL Offset -191 [ct]

Here's the measurements with the augmented IFO configuration, with 
    Filter Cavity Detuning = -28 Hz offset
    SRCL Offset -306 [ct]

    /ligo/groups/cal/H1/measurements/PCALY2DARM_BB
        PCALY2DARM_BB_20250327T155611Z.xml
    /ligo/groups/cal/H1/measurements$ ls */*20250327*.hdf5
        DARMOLG_SS/DARMOLG_SS_20250327T160138Z.hdf5
        PCALY2DARM_SS/PCALY2DARM_SS_20250327T160138Z.hdf5
        SUSETMX_L1_SS/SUSETMX_L1_SS_20250327T160138Z.hdf5
        SUSETMX_L2_SS/SUSETMX_L2_SS_20250327T160138Z.hdf5
        SUSETMX_L3_SS/SUSETMX_L3_SS_20250327T160138Z.hdf5
Due to the augmented SRCL offset, these measurements should *not* be included in the collection of measurements used for creating estimates of residual sensing function systematic error.
The filter cavity detuning change only impacts the noise performance of the IFO, so if need be, you *can* still use the actuation function portion of the measurement suite.