ryan.crouch@LIGO.ORG - posted 19:28, Monday 01 January 2024 - last comment - 21:51, Monday 01 January 2024(75114)
Lockloss at 02:20
Lockloss at 02:20UTC, HAM3 ISI watchdog trip from the cps sensors? Seismic motion was increasing at the time. CPS_H2 sees a big spike which presumably was the trip.
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Back into observing at 03:20UTC
This looks like a CPS glitch, H2 and V2 sensor see coincident spikes not seen on other sensors. I think these sensors are both in their own box, corner 1 and 3 are in the other chassis, I will take a look during maintenance tomorrow.