J. Kissel

We've had a really tough time keeping the IFO locked over the past week, which has made taking full interferometer calibration measurements difficult. In anticipation / hope that things might get better over the long weekend, here're the location of pre-tuned sensing function sweeps in case anyone gets a good lock stretch:
    /ligo/svncommon/CalSVN/aligocalibration/trunk/Runs/O3/H1/Measurements/FullIFOSensingTFs/
        2019-01-16_H1_PCAL2DARM_TF_5t1100Hz_3min.xml
        2019-01-16_H1DARM_OLGTF_5to1100Hz_14min.xml

To run:
(0) Make sure the IFO has thermalized, letting things settle for ~30 minutes after powering up. The measurements MUST be run in the same, well-thermalized lock stretch.
(1) Request NLN_CAL_MEAS from the ISC_LOCK guardian state (this turns off all calibration lines).
(2) Run each sweep in series; run the PCAL sweep first b/c it's quicker. (You can "cheat" a bit if you're impatient -- when the PCAL gets past ~10 Hz, you can start the DARM OLGTF)
(3) Save the templates with a new date, YYYY-MM-DD but in the same folder.
(4) Request NOMINAL_LOW_NOISE, which will turn the calibration lines back on.

As is indicated by the file names, both measurements together should take about 20 minutes.