TITLE: 07/28 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 52Mpc
INCOMING OPERATOR: Corey
SHIFT SUMMARY:

Jim and Sheila were damping violin modes at DC_READOUT when I arrived. I damped ETMY mode 9 (1009.2 Hz) using FM4, FM5, FM7 +100 gain in YAW. This is a change but I am not confident enough to update the wiki table or guardian code. Moved on to NLN in time to be hit by a magnitude 5.1 earthquake in California but remained locked. Reverted a SDF difference for the HAM4 ISI per Jim's instructions. Sheila and Marc did work at end X. Lost lock at 01:09 UTC. Stopped at DC_READOUT_TRANSITION to damp violin modes (the fundamentals were bad again). Damped the fundamentals. Accidentally rang up the second harmonics while trying to damp them. After damping them back down to where they were before I decided to move on to NLN and observing. PI mode 28 has rung up both times in NLN. My attempts to damp it by changing the phase do not seem to have much effect, but eventually it comes down anyway.

The range is slowly improving.

There are DIAG_MAIN notifications for both PCAL X and Y RF PD being greater than 1% off.

LOG:

00:00 UTC Trying DC_READOUT -> NLN. Changed intention bit from observing to lock acquisition.
00:08 UTC Earthquake
Sheila and Marc to end X
00:50 UTC Sheila and Marc back
Sheila running measurement
~01:00 UTC Reverted HAM 4 ISI SDF difference
01:09 UTC Lock loss
01:35 UTC Stopped at DC_READOUT_TRANSITION to damp violin modes. Fundamentals are bad again.
03:44 UTC NLN
03:58 UTC Observing