TITLE: 07/15 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 132Mpc
SHIFT SUMMARY: Been in NLN 1h55, still haven't had a TOO to take the 'pydarm measure --run-headless bb' calibration measurement.
LOG:
- Lockloss @ 19:06UTC 1373483210 alog 71353
- 20:03-20:07UTC IMC_LOCK was struggling during laser noise suppression with log message "Diffracted power jumped too much, toggling secondloop", didn't look into how long this has been going on for Tagging PSL
- During relock while damping violins I did some OMC shaking 71354
- Back to NLN and Observing at 21:08UTC
- Small EQ from Japan at ~21:50UTC
Looking into IMC_LOCK "Diffracted power jumped too much, toggling secondloop" message. In this 07/15 20:02UTC lock the CLOSE_ISS state worked on it's fourth attempt, see attached.
Since then it has worked on the first (07/16 11:41UTC) and second (07/16 13:50UTC) attempts. Before this it worked on the first (07/14 23:21UTC) (07/14 17:15UTC), second (07/14 12:25UTC) and fifth (07/13 09:14UTC) attempts.
Maybe this is expected but should be looked into, may be related to low ISS diffracted power issue Jason will fix this week (71322).
