At 05:27 6/23/2017 UTC (22:27 PDT Thursday night) we received a short timing GPS-EY error which cleared quickly. Looking at DAQ trends for this system, this appears to be another bogus GPS error. The attached dataviewer trend (second trend, 5 minutes duration, 20:25 - 20:30 PDT Thu 6/22) shows that the reported number of tracked satellites drops to zero, but the not-tracking-satellites flag does not report this. Also the number of visible satellites stays at 10 during the glitch.

model restarts logged for Thu 22/Jun/2017 - Wed 14/Jun/2017 No restarts reported

model restarts logged for Tue 13/Jun/2017
2017_06_13 09:24 h1isiham6
2017_06_13 09:29 h1broadcast0
2017_06_13 09:29 h1dc0
2017_06_13 09:29 h1fw0
2017_06_13 09:29 h1fw1
2017_06_13 09:29 h1fw2
2017_06_13 09:29 h1nds0
2017_06_13 09:29 h1nds1
2017_06_13 09:29 h1tw1
2017_06_13 10:19 h1isiham6
2017_06_13 11:23 h1iopoaf0
2017_06_13 11:23 h1oaf
2017_06_13 11:23 h1pemcs
2017_06_13 11:23 h1tcscs
2017_06_13 11:24 h1calcs
2017_06_13 11:24 h1iopseih45
2017_06_13 11:24 h1ngn
2017_06_13 11:24 h1odcmaster
2017_06_13 11:24 h1susprocpi
2017_06_13 11:26 h1hpiham4
2017_06_13 11:26 h1hpiham5
2017_06_13 11:26 h1iopoaf0
2017_06_13 11:26 h1isiham4
2017_06_13 11:26 h1isiham5
2017_06_13 11:27 h1calcs
2017_06_13 11:27 h1oaf
2017_06_13 11:27 h1odcmaster
2017_06_13 11:27 h1pemcs
2017_06_13 11:27 h1tcscs
2017_06_13 11:28 h1ngn
2017_06_13 11:28 h1susprocpi

Maintenance Tuesday. New isiham6 code with associated DAQ restarts. Unexpected problems with h1seih45 and h1oaf0 which required model restarts.

model restarts logged for Mon 12/Jun/2017 - Wed 07/Jun/2017 No restarts reported

model restarts logged for Tue 06/Jun/2017
2017_06_06 08:54 h1susomc

Maintenance Tuesday, minor model change to h1susomc.

model restarts logged for Mon 05/Jun/2017 - Sat 03/Jun/2017 No restarts reported

model restarts logged for Fri 02/Jun/2017
2017_06_02 10:17 h1caley
2017_06_02 10:17 h1iopiscey
2017_06_02 10:17 h1iscey
2017_06_02 10:17 h1pemey
2017_06_02 10:18 h1caley
2017_06_02 10:18 h1iopiscey
2017_06_02 10:18 h1iscey
2017_06_02 10:18 h1pemey
2017_06_02 10:19 h1alsey

h1iscey power cycle as part of ALS-Y problem investigation.

model restarts logged for Thu 01/Jun/2017
2017_06_01 11:59 h1nds1
2017_06_01 12:01 h1nds0

Completion of minute trend offloading required restart of NDS  daqd.

model restarts logged for Wed 31/May/2017 No restarts reported

TITLE: 06/23 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 66Mpc
OUTGOING OPERATOR: Jim
CURRENT ENVIRONMENT:
    Wind: 4mph Gusts, 2mph 5min avg
    Primary useism: 0.01 μm/s
    Secondary useism: 0.18 μm/s
QUICK SUMMARY:  No issues handed off.  Lock is ~22 hours old.

TITLE: 06/23 Owl Shift: 07:00-15:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Observing at 67Mpc
INCOMING OPERATOR: Travis
SHIFT SUMMARY: Another quiet shift
LOG:

Nothing to report. Environment is quiet, IFO was locked all shift.
 

  In Observing for about 7 hours. All green and clear at this time.

   Pitch: ETMX, ITMX, and SR3 were at or above 10urads. They have been reset to zero. See Figure 1
   Yaw: ETMX and ITMX were atthe 10urads line. The BS is close to the 10urad line, however the slpoe is flat. See Figure 2 

Close FAMIS Task #4733

TITLE: 06/22 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 69Mpc
INCOMING OPERATOR: Jeff
SHIFT SUMMARY:  Commissioning for the first half of the day, Observing for the second.  H1 locked for ~6 hours, Observing for ~3 hours.  No issues to report.
LOG:  See previous aLogs.  A couple of locklosses during Commissioning period that I didn't bother to log because they were CCLs (Commissioner Caused Lockloss);).

It seems that there is high coherence between ASC CSOFT/CHARD and LSC PRCL/MCL. Please see the attached plots (data from Jun 20, 02:00:00 UTC, for 1024s).

Especially with PRCL, the ~0.4 Hz peak seems to be related to the dP/dtheta instability (37046 and alogs referred therein). Does this indicate that there is a large cross-coupling from LSC to ASC ( i.e. a large dtheta/dF term in the dP/dtheta loop)? Would l2a ff (see, e.g., LLO 31756) help?

Short summary posted below. See here for full results.

• 48.9% overall duty factor. Opportunistic commissioning and recurring 0.4Hz pitch instability ate into observation time.
• 65-70 Mpc BNS range typical for observation segments.
• Acoustic noise reappeared at EY - Hveto round 1 winner on Monday H1:PEM-EY_MIC_VEA_MINUSY_DQ
• 0.44 Hz oscillation in optics pitch degraded dataquality, mostly on Tuesday

Sheila logged that the two lock-losses on Tuesday were caused when her excitation measurement on the PSL ISS THIRDLOOP SERVO was both aborted and when it completed correctly. It would appear that this is due to the filter being used by the excitation has a slow ring down and it was outputting a non-zero value when the awgtpman killed the excitation. This caused a sharp transient step which in this case resulted in the output of the THIRDLOOP_SERVO filter going very high.

This problem was initially reported by Jenne in this alog. My analysis was reported in this alog. Daniel, Jim and myself came up with a work-around described in this alog  and in this wiki  

To verify the filter in this case has a long ring down, I ran it on a test stand front end, it does indeed have a long ring down, image is attached.

I had opened FRS8368  for this issue, which can now be closed.

The flow rate in the power meter flow circuit has gotten extremely noisy in the past 3 days.  Since no debris
was observed in the filters, one wonders if it's the flow sensor or perhaps the Beckhoff terminal input that
processes the output of the flow sensor.

Locked at NLN for 2.5 hours for commissioning work.  Set to Observe at 19:46 UTC after Sheila's measurement wrapped up.

Added 225 mL H2O to Xtal chiller.  Diode chiller was good.  Filters still appear clean.  This closes FAMIS task 6528.

While LLO is still down, Sheila is planning to do some commissioning for a couple of hours.  Will monitor the state of LLO and revert to Observing when they get locked.

TITLE: 06/22 Owl Shift: 07:00-15:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: EARTHQUAKE
INCOMING OPERATOR: Travis
SHIFT SUMMARY:

Fairly standard shift until a big Guatamalan EQ took H1 down for going on 2.5hrs.  EQ band recently low enough to start locking up H1 again.  

Saw a pair of porcupines.
LOG:

• 8:36 TCSy Chiller Flow Low Alarms begin & Topped Off (see alog)
• 10:38 -11:38 GRB (Swift) Stand Down Time.
• 12:39:  EQ Lockloss
  • 13:46 Starting to align ALS.  ALSy was in La La Land no matter what ETM tweaks I tried.  I Cleared History for End Y Overview and tried to reduce error signals, but I didn't get very far.  Ultimately, I started an Initial Alignment over for ALSy.  In retrospect, I should have just waited a little longer for the EQ to die down a little.
  • Currently locking on steps after DRMI as I hand off to Travis

TITLE: 06/22 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Lock Acquisition
OUTGOING OPERATOR: Corey
CURRENT ENVIRONMENT:
    Wind: 11mph Gusts, 8mph 5min avg
    Primary useism: 0.09 μm/s
    Secondary useism: 0.17 μm/s
QUICK SUMMARY:  Relocking after an EQ ~2 hours ago.  Currently at the CARM reduction steps, so progressing well.  No other issues were handed off.

• 12:36 (5:36amPDT):  Incoming EQ Verbal alarm (but don't see anything on USGS)
• 12:39:  USGS posts 6.8 Guatamala EQ 
• 12:39:  H1 lockloss
• 12:40:  EQ seen on BLRMS (eventually gets to 11um/s!)
• 12:49:  EX ISI Tripped & Seismon transitioned to EARTH_QUAKE_V2.
• 12:53:  IMC breaking lock.
• 12:55:  Noise Eater out of range...toggled it off/on
• 12:56:  Many other ISIs & BS trips
• 13:11:  Everything GREEN again for ISI/SUS & IMC locked....knock on wood.

Sun almost rising.  H1/GEO OBSERVING.  Virgo Locking.  Winds are about the same.  And H1 is at 65Mpc.