model restarts logged for Sat 11/Mar/2017* No restarts reported

model restarts logged for Sat 11/Mar/2017 No restarts reported

model restarts logged for Fri 10/Mar/2017 No restarts reported

Note that the reporting code mistakenly reported Sun as Sat in this morning's report. This is because LHO transitioned from PST to PDT at 02:00 Sunday. My code runs at 5 minutes past midnight, and goes back a period of 24 hours to get the previous day's date. When it ran at 00:05 PDT this morning, going back 24 hours ( convert to GPS, subtract 24*60*60 seconds) effectively goes back 25 hours to 23:05 Sat 11th. Other uses of relative time spanning this period may have similar surprises.

Summary of the DQ shift from Thursday 9th March to Sunday 12th March (inclusive), click here for full report:

* The DQ Shift started with a duty cycle of 76%, which increased to 86%, 95% and on Sundaw went back down to 60% due to extreme weather conditions of high Wind and microseism ground motion.

* Range sensitvity mainly around 65 Mpc, with the excepcion of Friday which most time around 60MPc due to strong Winds.
* Weather conditions has had an impact on range sensitivity and range during this DQ shift.
* Not many locklooses; some due to PI ringing up, other was preceded by soft. sat. of H1:LSC-X_ARM_CTRL, others high winds and micoseism ground motion.
* Script 'a2l' has been run quite a few times during this shift due to the common presence of low freq. noise (10-20Hz), which mostly had not impact on range sensitivity.
* A few Earthquakes which caused not much problem.
* IMPORTANT: Driving PI mode 23 (for instance when applying damping filters) caused glitchy narrow lines at (14.5, 64.0, 78.5 and 142.5 Hz), this dominated Omicron glitchgram with a 60-80Hz band of high SNR glitches. Commissioners have noticed this an put in place a practice of not damping this mode anymore unless required for lock acquisition.
* IMPORTANT: The Gold Star Omicron glitch for the whole of Friday was a blip glitch coincident with all quadrants of H1:SUS-ETMY_L2_NOISEMON, and the highest New SNR glitch for Sunday reported by PyCBC? live 'short' was of this type too. This relates to the alog entry by Miriam, Hunter, Andy where it was reported evidence that 'Some blip glitches may be due to ETMY L2 coil drive'.
* Observed high SNR glitches caused by scattering of SUS-SRM and SUS-PRM
* Increased limits of the X and Y arm LSC tidal HEPI off load for tidal control.
* PLS tripped with standard Flow-1 error, which was caused by the drop in flow rate in head 3. This was quickly solved.
* On Sunday high winds and microseism caused repeated tidal alarms "Tidal X/Y error" as the tidal arm servos were railing at their limits (solved by increasing their range), this had an impact in lock acquisition.
* On Sunday 'a2l' script did run with errors due to execution permissions, leaving the Gains to some random values worse than when the script started which increased low frequency noise. The permissions issue will be soon looked up and the script may be modified such that when errors occur the Gain values should be reverted to the ones at the start.

   In Observing for past 12 hours. Environmental conditions are good. No issues or concerns at this time. 

Starting CP3 fill. LLCV enabled. LLCV set to manual control. LLCV set to 50% open. Fill completed in 2192 seconds. TC B did not register fill. LLCV set back to 19.0% open.
Starting CP4 fill. LLCV enabled. LLCV set to manual control. LLCV set to 70% open. Fill completed in 2276 seconds. TC A did not register fill. LLCV set back to 41.0% open.

   Reviewed the the work permits for Tuesday's maintenance window
    - The PSL will be down for most of the window
    - Expecting 2 Nitrogen deliveries on Tuesday
    - There will be tumbleweed baling On Monday & Tuesday

   Tumbleweed baling Monday along the Y Arm

Mag 5.3 Earthquake near Ovalle, Chile

    Seen on USGS, Seismon, and Terramon
    USGS - Mag 5.3 EQ at 15:05 UTC
    Terramon - Mag 5.1 EQ at 15:00 UTC, Predicted R-Wave of 0.822um/s arrival 15:52
    Rise in the BLRMS around 15:17 UTC; Primary microseism peak of 0.1um/s
    No apparent effect on H1

TITLE: 03/13 Owl Shift: 07:00-15:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Observing at 64Mpc
INCOMING OPERATOR: Jeff
SHIFT SUMMARY: Quiet shift
LOG:
Travis had it locked when I arrived, it's still locked as I leave. EY vacuum was alarming all night, otherwise nothing to report. 

CP7 dewar level alarm is due to the level being below 20% -> Accumulated tumbleweeds obstructing the Y-arm access road last Tuesday caused the cancellation of the originally scheduled LN2 delivery.  Rescheduled delivery is for this Tuesday.  No action is required by the CR operator.

TITLE: 03/13 Eve Shift: 00:00-08:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 68Mpc
INCOMING OPERATOR: Jim
SHIFT SUMMARY:  One lockloss due to PSL trip.  One unknown cause lockloss.  I did have a couple of Tidal X and Y error again tonight during relocking, but they stopped without intervention.  Otherwise a quiet night.  I did get a call from both Chandra and DaveB about CP7 alarms, although I did not receive any alarms in the control room.  Chandra advised to ignore these alarms until Tuesday since the dewar was not filled last Tuesday due to tumbleweed blockage, hence the low level.
LOG:  See previous aLogs.

No issues coming back up. 

Cause unknown.  FOMs look good and environment is quiet.

Begin 1 hour standdown.

No issues coming back up after PSL restart.

PSL tripped. Calling Peter.

TITLE: 03/12 Eve Shift: 00:00-08:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 67Mpc
OUTGOING OPERATOR: Jeff
CURRENT ENVIRONMENT:
    Wind: 6mph Gusts, 4mph 5min avg
    Primary useism: 0.03 μm/s
    Secondary useism: 0.31 μm/s
QUICK SUMMARY:  No issues handed off.  Looks like a much better start to the night than last night.

Shift Summary: Ran A2L DTT check – Pitch and Yaw are a bit elevated. As LLO is down, dropped out of Observing to run corrective script. A2L script finished with errors. Back to Observing. Spoke with Keita about the A2L Script. See aLOG #34763 for details. Successfully ran the script from a Controls terminal. Pitch and Yaw are now below the reference.

Remained lock for the entire shift. No issues or problems to report.

Miriam, Hunter, Andy

A subset of blip glitches appear to be due to a glitch in the ETMY L2 coil driver chain.

We measured the transfer function from the ETMY L2 MASTER channel to the NOISEMON channel (specifically, for the LR quadrant). We used this to subtract the drive signal out of the noisemon, so what remains would be any glitches in the coil drive chain itself (and not just feedback from DARM). The subtraction works very well as seen in plot 1, with the noise floor a factor of 100 below the signal from about 4 to 800 Hz.

We identified some blip glitches from Feb 11 and 12 as well as Mar 6 and 7. Some of the Omega scans of the raw noisemon signals look suspicious, so we performed the subtraction. The noisemons seem to have an analog saturation limit at +/- 22,000 counts, so we looked for cases where the noisemon signal is clearly below this. In some cases, there was nothing seen in the noisemon after subtraction, or what remained was small and seemed like it might be due to a soft saturation or nonlinearity in the noisemon.

However we have identified at least three times where there is a strong residual. These are the second through fourth plots. We now plan to automate this process to look at many more blip and check all test mass L2 coils in all quadrants.