Attached is a list of channels monitored by Conlog with the number of times each changed over the period of one hour this morning. Each of these channels changed more than 600 times in the hour. I will likely remove these from Conlog unless I hear a strong objection otherwise. These should be updated to be written as readonly in the autoBurt.req files. I understand that this would probably require changing the comments in the Beckhoff code that generates them.

The motivation for removing these is that Conlog has now used approximately 11% of its available disk space of 2 TB in about 2 weeks and 5 days.

A question: What are the guardian channels that end in _WORKER?

I reset both PSL power watchdogs at 19:00 UTC (11:00 PST).  This closes FAMIS task 3638.

Checked the dust monitor vacuum pumps in the CS and both ends. Adjusted pressures as necessary. All temperatures within normal range.

H1 remained locked while the Norco truck drove to CP1.

• 17:37:57UTC - Norco truck is through the gate and along side the main parking lot
• 17:39:42UTC - Norco truck drives off of the pavement in front of CP1 and into the rocks, stops and backs up
• 17:40:00UTC - Norco truck is parked, though still running

This injection of noise into H1 was very similar to the flatbed truck that picked up the frontloader, alog 34102.

The phone at EY Ext 239 has been down.  The problem was the Analog driver in the corner station was not supplying enough voltage to the end station.  We have moved the number to different outputs on the unit and moved the wiring at the end station.  The entrance phone and VEA phone are working now.  

Lowered CP3 LLCV from 16 to 15% open.

TITLE: 02/21 Day Shift: 16:00-00:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Preventitive Maintenance
OUTGOING OPERATOR: Corey
CURRENT ENVIRONMENT:
    Wind: 10mph Gusts, 5mph 5min avg
    Primary useism: 0.04 μm/s
    Secondary useism: 0.17 μm/s
QUICK SUMMARY:  Corey handed off a recently relocked H1.  At 16:03 UTC, I transitioned ISI_CONFIG to VERY_WINDY_NOBRSXY and set OPS_OBSERVATORY_MODE to Preventative Maintenance in preparation for Maintenance Day activities. 

TITLE: 02/21 Owl Shift: 08:00-16:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Observing at 68Mpc
INCOMING OPERATOR: Travis
SHIFT SUMMARY:

Other than a big South American EQ which took H1 & L1 down, had a nice shift.
LOG:

• 11:00 EQ
• 12:16 EQ
• 14:30 LOCKLOSS, 6.5 Bolivian EQ
  • Took OBSERVATORY MODE immediately to LOCKACUISITION, but eventually went to the more apt EARTHQUAKE state.
  • Went to LARGE_EQ_NOBRSXY briefly & then back to WINDY
  • After swinging around a little proceeded with locking.
  • 15:17 OBSERVING, even though we are 43min away to MAINTENANCE DAY...no one is lined up for Maintenance, so padding our UP-Time! 
• CS ECAT PLC2 SDF Diffs AGAIN!
  • Similarly to Nutsinee, had an SDF Diff.  H1:IMC-REFL_SERVO_IN1GAIN has been drifting from -8 -> -6 -> -7(currently).  I ACCEPTED this Diff; snapshot attached.
• ~15:37 Bartlett gently driving his truck to OSB Receiving
  • Huge glitch appeared on Range...wonder if this is due to his truck approaching.
• 15:42 Bartlett opening OSB Receiving Roll-Up Door--->No Glitch
• 15:47 Bartlett driving his truck away--->No Glitch
  • This probably means the 15:37 glitch was something else.
• 16:00 MAINTENANCE DAY BEGINS

• EQ seen at:
  • USGS: Listed it at 14:09utc
  • SEI BLRMS:  14:20utc
• Magnitude: 6.5
• Location: Bolivia
• Starting time of event: 14:20utc
• Lock status:  H1 (&L1) Lockloss

Pretty abrupt lockloss if it was due to the EQ (no heads up on the Tidal striptool).  L1 also lost lock.

Going to LARGE_EQ_NOBRSXY to ride it out for a bit (since the ISI_CONFIG window told me to)....but it looks like this quake is not that bad...may transition sooner rather than later.

• EQ seen at:
  • USGS:  Seen on site around 12:00 utc, but it was listed as occurring at 11:08utc
  • SEIS BLRMS:  Appeared at 12:18utc up to 0.7um/s (0.03-0.1Hz band)
  • Tidal Strip Tool:  Oscillations at 12:16utc
  • Terramon DEAD
• Magnitude: 5.1
• Location: Southwest Indian Ridge
• Starting time of event: 12:16utc locally
• Lock status?  Observing, but oscillations seen on tidal.

H1 Locked for 8hrs.  Decent range. 

See a 5.1 EQ in Indian Ocean off of eastern Africa.  We'll see if that gives us any grief.

• EQ seen at:
  • USGS:  4.9 Solomon Islands at 10:01utc, or 4.7 Tajikistan at 10:24utc
  • SEI BLRMS:  11:00utc up to 0.7um/s (0.03-0.1Hz band)
  • Terramon has been dead.
• Magnitude: 4.9 or 4.7
• Location: Solomon Island or Tajikistan
• Starting time of event: 10:01utc?  Seen locally at ~11:00utc
• Lock status?  H1 Observing and no noticeable effect.  L1 has had a recent lockloss which could be related to it?

TITLE: 02/21 Owl Shift: 08:00-16:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Observing at 70.1Mpc
OUTGOING OPERATOR: Nutsinee
CURRENT ENVIRONMENT:
    Wind: 4mph
    Primary useism: 0.02 μm/s
    Secondary useism: 0.20 μm/s

Light rain on drive in (most of the snow is finally melted [we've had snow on the ground since early January!]).  useism has been trending down for the last 18hrs.
QUICK SUMMARY:

Nothing noteworthy for hand-off.  L1 had been down but are now making us doubly coincident.  Just a comparison to last night, the fundamental violin mode is an order of magnitude higher than last night (is 2e-18 tonight vs. 2e-19 last night)

TITLE: 02/21 Eve Shift: 00:00-08:00 UTC (16:00-00:00 PST), all times posted in UTC

STATE of H1: Observing at 69Mpc

INCOMING OPERATOR: Corey

SHIFT SUMMARY: Quiet. One lockloss. No issue coming back up.

Keita, Sheila, Vaishali

Bullseye

On Friday we had a first look at some data from the new bullseye PD we installed this week. The point of installing this detector was to investigate the broad lump of noise which shows up at some interferometer alingments. 

The first attachment shows the RIN measured on the QPD (NSUM) and the HPL diode, the bullseye signal which is labeled here as PIT and roughly calibrated into beam radii, and a yaw signal which is not correctly normalized or calibrated. The second attachment shows coherences.  The bullseye signals is very coherent with intensity noise, and all the signals have small coherence with DARM both at low frequencies and up to nearly a kHz where the broad lump of noise was. (This was measured in our normal observing configuration where we don't see the broad lump of noise.)  The third attachment shows the DAMR spectrum, with predictions for the level of noise based on the coherences with the bullseye detector (DARM ASD *sqrt(coherence))  Since there is a lot of coherence between the bullseye detector and intensity noise, I have also shown the intensity noise projection from the noise budget based on injections into the ISS second loop.

Other noise subtraction

Using the same long coherence data that we got for the bullseye coherences, I did a subtraction very similar to what Keita did in 33650.  I used IMC WFS A+ B DC PIT and YAW, SRCL, PRCL, MICH, all 3 bullseye sensors, and ASC HARD control signals.  At each frequency I used ony the channel that had the highest coherence, and estimated the noise in DARM attributed to that channel as DARM asd*sqrt(coherence). The fourth attached plot shows the estimations for some individual channels and the combined one which is the estimate for the most  coherent signal at each frequency. 

The last attachment shows the DARM spectrum with this signal subtracted (labeled subtraction residual) which looks very similar to Keita's result with only jitter channels subtracted, as well as this subtracted DARM with shot noise also subtracted (shown in green).

Tom Dent, Miriam Cabero

We have identified a sub-set of blip glitches that might originate from PSL glitches. A glitch with the same morphology as a blip glitch shows up in the PSL-ISS_PDA_REL_OUT_DQ channel at the same time as a blip glitch is seen in the GDS-CALIB_STRAIN channel.

We have started identifying times of these glitches using omicron triggers from the PSL-ISS_PDA_REL_OUT_DQ channel with 30 < SNR < 150 and central frequencies between ~90 Hz and a few hundreds of Hz. A preliminary list of these times (on-going, only period Nov 30 - Dec 6 so far) can be found in the file

https://www.atlas.aei.uni-hannover.de/~miriam.cabero/LSC/blips/O2_PSLblips.txt

or, with omega scans of both channels (and with a few quieter glitches), in the wiki page

https://www.lsc-group.phys.uwm.edu/ligovirgo/cbcnote/PyCBC/O2SearchSchedule/O2Analysis2LoudTriggers/PSLblips

Only two of those times have full omega scans for now:

https://ldas-jobs.ligo-wa.caltech.edu/~detchar/hveto/day/20161204/1164844817-1164931217/scans/1164876856.97/

https://ldas-jobs.ligo-wa.caltech.edu/~detchar/hveto/day/20161204/1164844817-1164931217/scans/1164882018.54/

The whitened time-series of the PSL channel looks like a typical loud blip glitch, which could be helpful to identify/find times of this sub-set of blip glitches by other methods more efficient than the omicron triggers:

https://ldas-jobs.ligo-wa.caltech.edu/~detchar/hveto/day/20161204/1164844817-1164931217/scans/1164876856.97/1164876856.97_H1:PSL-ISS_PDA_REL_OUT_DQ_1.00_timeseries_whitened.png