Nothing apparent on FOMs.  Unknown cause.

TITLE: 04/02 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 61Mpc
OUTGOING OPERATOR: Jeff
CURRENT ENVIRONMENT:
    Wind: 35mph Gusts, 30mph 5min avg
    Primary useism: 0.15 μm/s
    Secondary useism: 0.44 μm/s
QUICK SUMMARY:  High winds are affecting our range a bit, but we have been locked for ~24 hours.

Shift Summary: Run A2L check script; Both Yaw and Pitch are elevated. Will run the correction script when possible.

Overall a good observing shift.

In the last hour, the wind has come up to Near Gale conditions with gusts well into the full Gale range (40 mph+). Primary microseism for the End Stations has correspondingly risen to near 0.9um/s. Range has dropped to 63.9 Mpc. There is a 0.723um/s R-Wave predicted to hit the site around 15:00 (08:00), the result of a Mag 5.2 earthquake near Bengkulu Indonesia. So far, no indications of the R-Wave arrival.    

   10:36 (03:36) GRB Alert - Both sites in Observing

Beam position based on exciting the pitch(yaw) DOF and then changing P2L(Y2L) gain to minimize the peak.  Both measurements use a sign convention that is consistent with UR coil values.  The Dec 2013 alpha numbers are as posted, however the beam distance numbers have been recalculated.  In Dec 2013 the conversion from alpha to mm was 37.5mm/alpha, and the current conversion is 42.2mm/alpha.

The animation that's attached shows the ideal IMC alignment in a dashed magenta line, the Dec 2013 alignment in red, and the Mar 2017 alignment in blue.  Green markers show the optics, squares are MC1, triangles are MC2, and circles are MC3.

The lines and markers accurately represent the optics and the beam changes, but are not to scale.  I altered some numbers to make the changes visible in this animation.

TITLE: 04/02 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 53Mpc
INCOMING OPERATOR: Jeff
SHIFT SUMMARY: Locked for 15.5hours, wind has been a steady 15mph and useism is rising up to 0.5um/s. There was a  large glitch just now that is showing up on the glitchgram in almost the entire shown frequencies.
LOG:

06:52 GRB

TITLE: 04/01 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 70Mpc
OUTGOING OPERATOR: Travis
CURRENT ENVIRONMENT:
    Wind: 19mph Gusts, 16mph 5min avg
    Primary useism: 0.04 μm/s
    Secondary useism: 0.34 μm/s
QUICK SUMMARY: Smooth sailing at 70Mpc for almost 8hours

TITLE: 04/01 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 70Mpc
INCOMING OPERATOR: TJ
SHIFT SUMMARY:  Observing for ~8 hours.  Relocked early in the shift.  No issues to report.
LOG:  See previous aLogs.

Locked for ~4 hours.  No issues.

Begin 1 hour stand down.

No issues relocking. 

Shift Summary: Run A2L check script; Pitch is around 0.6, Yaw is below reference. Lost lock, reason unknown. Had trouble with ALS locking, finding IR and DRMI_1F. Ran initial alignment. On relocking, broke lock, twice on FIND_IR ALS_DIFF. Third time made it all the way to NLN. Back to Observing.

Ran A2L check script. Pitch is up to 0.9, Yaw is OK. Will run correction script when opportunity presents.  

Damping unruly PI Modes 27 & 28

Lost lock a second time, with no apparent cause. Did not need realignment. During FIND_IR lost lock several times during ALS_DIFF. From the log it looked like the offset was being moved from 1368 to 0 and then back to 1368. The lock was breaking on the second jump of the offset to 1368. Made it through FIND_IR just as Travis was coming on shift. Relocking is proceeding.

TITLE: 04/01 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Lock Acquisition
OUTGOING OPERATOR: Jeff
CURRENT ENVIRONMENT:
    Wind: 7mph Gusts, 4mph 5min avg
    Primary useism: 0.03 μm/s
    Secondary useism: 0.26 μm/s
QUICK SUMMARY:  Unlocked before my arrival.  Relocking seems to be going OK with none of the issues noted by previous operators thus far.

   First 3 hours of shift were good observing time. 
   
   Lost lock - reason unknown. Had trouble with ALS Locking, IR, and DRMI_1F, so ran initial alignment. On relocking, broke a couple of times on FIND_IR for ALS_DIFF. After this relocking went OK. Reset the ETMX RMS WD. Finally relocked at NLN. 

   IFO in Observing, 29.2W, and 75.2 Mpc. Wind and seismic are low.   

TITLE: 04/01 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 68Mpc
INCOMING OPERATOR: Jeff
SHIFT SUMMARY: One lockloss that I couldn't figure out. There was a small earthquake coincidentally at the same time, but it didnt look to me like that was the cause, there was not enough motion on the platforms. Relocking had some minor annoyances, see my last alog for more info.

Not a straight forward relock. I couldn't get green to lock without having to move the TMSs so I went to do an initial alignment, but then the fiber polarization was >20% on the Y laser. After adjusting that and moving through IA, MICH would not dark lock. The alignment looked really good but it still would only lock bright. The dark offsets didn't look great so I ran the scripts for that hoping it might help. Then INPUT_ALIGN refused to lock. This is exactly what happened after the harmonic oscillator was replaced recently so I was getting worried, but bumping up the LSC XARM gain eventually worked. I couldnt bring the gain back down or it would kick the IMC and lose lock. After this the rest of IA went well, and locking was no problem.

Bounce is damping slowly but we are back to observing.

See red and blue VS green. Bumps are at around [4, 5, 6, 7, 8]*12.125 Hz or so.

When it was really bad (red), it was easily identifiable in detchar summary page, not so when it was mildly bad (blue).