TITLE: 11/20 Day Shift: 16:00-24:00 UTC
STATE of H1: Observing
SHIFT SUMMARY: Lost a 30 hour lock from an earthquake. Jeff, Kiwamu and Darkhan were here doing calibration stuff. Having problems relocking, can't get past noise-tunings. ITMY swing continues to annoy after lock losses.
20:00 Jeff and crew start calibration measurements
21:00 6.4 earthquake in Argentina breaks lock
21:30 Corey brings a tour through
22:00 Robert in and out of LVEA, setting up PEM injections
Cheryl, Kiwamu,
Executing each line of NOISE_TUNINGS, we spotted typo in which MICH FF and SRCL FF1 were selecting a wrong set of digital filters. In particular, MICHFF was the worst -- it didn't use the AC coupling filter, resulting in a jolt to ITMs. We set them to the ones that had been used in the previous 30 hour lock stretch (31653). Cheryl will test this to see if the situation is better.