Jim W. suggestd that we try out the 45mHz blends if we can't lock due to the high microseism. Just before I came on shift, Travis and Sheila switched them over for the X and Y directions on BS, ETMY, EMTX, ITMY, and ITMX. They decided to do this because of the low winds and high microseism.  This seemed to have helped us out quite a bit. Before the change, they struggled getting to lock DRMI, with them switched it only took us a few tries before we were all the way to Nominal Low Noise.

I will be accepting these blend changes in the SDF so we can move into Observing.

Furture operators should change them back if the winds pick up (Sheila says anything above 20 might be too high for these blends), but keep in mind this may drop lock.

Back to Nominal Low Noise after being out for ~19hours. LLO is still down so Sheila will run the A2L script and then we will clear up the SDF and move on to Observing.

Note: We are currently running with the 45mHz blends in the X and Y directions for all BSC ISI's to cope with the microseism.

Josh, Andy

Yesterday's hveto page found a very constant rate of 30-40Hz glitches in DARM were vetoed by a population of 10-15Hz glitches in the End-Y QPDs (ASC-Y_TR_{A,B}_{NSUM,YAW,PIT}_OUT_DQ). Fig1 shows the time/freq of the DARM triggers and the ASC-Y triggers that vetoed them, Fig 2 shows the time/freq of all DARM triggers and the ones that got vetoed, and Fig 3 shows how the ranking statistic found all ASC-Y channels to be correlated. A .txt file with the times of vetoed DARM triggers is attached in case folks want to look at other channels around those times. 

Fig 4 shows DARM, figs 5,6 show ASC-Y channels, figs 7,8 show zoomed specgrams to see the frequency. What we see are strong scattering arches around 8 and 16 Hz in all of the End-Y QPD channels, at the same time as similarly shaped fringes in DARM around 48Hz. I think DARM (more sensitive to scatter, potentially, at higher frequencies)  is seeing the 6th overtone of the 8Hz arch (multiple reflections?). The higher overtones are sometimes visible in the QPDs too. 

So...what scatterer/optics is moving too much? We know [1] that f_fringe(t) = 􏰁􏰁􏰁􏰁􏰁abs(2 v_sc(t) / lambda)􏰁. Where v_sc(t) is the time derivative of the position of the scatterer x_sc(t). The time between peaks is about 3.5 seconds, but that is half the period because of the abs() so it's a ~7 second period or 0.14Hz motion of the scatterer. 􏰁􏰁􏰁 

Note: We checked and the beam diverter is closed (H1:SYS-MOTION_Y_BDIV_A_POSITION = 1). 

Note 2: Today's hveto page hasn't finished yet, but no reason to believe this isn't happening still.  

[1] Accadia, T., et al. "Noise from scattered light in Virgo's second science run data." Classical and Quantum Gravity 27.19 (2010): 194011.

Title: 10/11 Owl Shift 7:00-15:00 UTC (0:00-8:00 PST).  All times in UTC.

State of H1: Aligning

Shift Summary: Unlocked when I arrived due to high winds.  Unable to complete initial alignment due to many issues I haven't seen before.  Called Sheila and she volunteered to come to the site to help.  When Sheila arrived, she noticed that microseism was high enough that it was giving me troubles locking.  We decided to try Jim's 45 mHz ISI blends, which helped enough to get further than I previously had.  However, the BS ISI stage 2 tripped after a few minutes.

Incoming operator: TJ

Activity log:

8:23 cleared H1IOPASC0 timing error

Working on relocking.  I have been struggling with alignment for a while, but with a little coaching from Sheila, I'm getting there.

Activity Log: All Times in UTC (PT)

23:00 (16:00) Take over from TJ
23:15 (16:15) Complete initial alignment. 
23:16 (16:16) Trying to relock
23:37 (16:37) Sheila left the site
00:00 (17:00) Put IFO in down state until wind and seismic calms down.  
02:05 (19:05) Robert S. left the site
02:15 (19:15) Wind below mostly 30 mph - trying to relock
02:35 (19:35) Wind back up, gusts near 40 mph– Cannot get past LOCKING_ALS, will wait for things to settle a bit more
04:18 (21:18) Wind up and down; Seismic still high. Tried relocking with same negative results 
04:43 (21:43) After 12 lockloss at LOCKING_ALS in 12 locking attempts and now seeing wind gusts up to 50+ mph, put the IFO in a DOWN state waiting for Mother Nature to relax  
06:28 (23:28) Wind dropping but still gusty, seismic activity still high. Going to give locking another try
07:00 (00:00) Turn over to Travis


End of Shift Summary:
Title: 10/10/2015, Evening Shift 23:00 – 07:00 (16:00 – 00:00) All times in UTC (PT)

Support: Sheila, Elli

Incoming Operator: Travis

Shift Summary: 
- After many tries cannot get past ALS locking state. Wind still over 35 mph with gusts to mid-50s. Will wait until settle down before trying to relock.

- Turned on Jim W. 45 mHz ST1 blends on ITMY while trying to lock (04:18 to 04:43). Saw no difference in the behavior of Y and X during ALS locking. Saw no apparent difference in behavior of the ALS locking with the 45 mHz or Quite_90 ST1 Blends.  
- Wind strong and gusty all shift. Seismic activity also high all shift. The wind is still in the upper 20s and gusty, although it is trending lower. In the past 30 have been able to get to LOCK_DRMI_1F before lockloss. Conditions are improving.  

   Wind had settled a bit (in the teens and 20 mph range) but seismic activity still high. I tried to relock using the 45 mHz Blends, supplied by Jim W, on ITMY. There was no observed difference in the locking/lockloss behavior with the 45 mHz or Quite_90 Blends. I restored the Quite_90 Blends on ITMY.

   Note: While trying to relock this time the wind came back up into the 20s and 30s with several gusts in the 40s, and a couple of gusts over 50 mph. I don't know how good a test of the 45 mHz Blends this was.       

   IFO has been unlocked all shift. Wind is still high (gusts in the 50s mph) but calming down. Mostly wind is in mid 20s to low 30s. Seismic activity is still high but also settling down. Tried relocking about 30 minutes ago, with no luck. Still cannot move beyond LOCKING_ALS. As conditions improve will continue to try relocking. 

Title:  10/10/2015, Evening Shift 23:00 – 07:00 (16:00 – 00:00) All times in UTC (PT)

State of H1: At 23:00 (16:00) Unlocked due to high wind and seismic activity. Running initial alignment. 

Outgoing Operator: TJ

Quick Summary: Wind is high 35mpg with gusts to over 40mph; seismic activity is also high. At shift change, TJ was finishing an initial alignment. Now trying to relock.      

Title: 10/10 Day Shift 15:00-23:00 UTC (8:00-16:00 PST).  All times in UTC.

State of H1: Unlocked, high winds and high microseism

Shift Summary: Locked until 21:24, haven't been able to relock since due to environment issue.

Incoming operator: Jeff B.

Activity log:

• 15:32 ETMY sat.
• 15:58 Out of Observing, Robert starting PEM inj
• 16:30 Robert to LVEA
• 17:10 Robert out of LVEA and going to area inside vertex to tamp
• 17:50 Robert, Chris back
• 18:10 Robert into LVEA
• 18:14 Robert out, LVEA swept
• 18:17 Observing
• 19:29 ETMY sat. (x2)
• 19:45 Hanford Fire Dept. Driving to MY to check on a panel that was giving them an alarm
• 20:01 Fire Dept. back, all is well
• 20:58 Sheila starting A2L script while LLO is down
• 21:24 Lockloss
• 22:28 Starting Initial Alignment, maybe it will help in these high winds
• 22:29 Ken and his Parents going into the CER
• 22:38 Ken and company out

After the lockloss at 21:24 UTC we haven't been able to lock since.

A few possible environmental factors for these locking woes:

• High winds - Gust up to 55 mph at EX
• High microseism - This has been up for the past 24 hours and hasn't gone down yet.

Out of Observing so Sheila can run her A2L script while LLO is down (WP#5552)

Observing at ~75Mpc. LLO was up for an hour or so but they are back down. The Hanford Fire Dept had to drive to MY to check a panel that was giving them an alert. Gardening crew is still on site and so is a tour group.

1. The re-calibrated C01 hoft data now exist at CIT.

The results of some quick tests are given below.

The calibration group should decide if it wants to do further testing before we announce that this data is ready for analysis.

Updated missing data and DQ flags are also yet to be inserted into the segment database.

2. The filter files and command line arguments used with gstlal_compute_strain are documented here:

https://wiki.ligo.org/Calibration/GDSCalibrationConfigurations

3. The frame-types, channels names, and DQ flag names are documented in the DCC here:

https://dcc.ligo.org/LIGO-T1500502

Specifically, the frame-types are H1_HOFT_C01 and L1_HOFT_C01 and exist for:

H1: 1125969920 == Sep 11 2015 01:25:03 UTC to 1128398848 == Oct 09 2015 04:07:11 UTC

L1: 1126031360 == Sep 11 2015 18:29:03 UTC to 1128398848 == Oct 09 2015 04:07:11 UTC

4. I have update the times C01 exists on the GDS calibration configuration pages, on the O1 Run page, and in the DCC document:

https://wiki.ligo.org/Calibration/GDSCalibrationConfigurations
https://wiki.ligo.org/LSC/JRPComm/ObsRun1#Calibrated_Data_Generation_Plans_and_Status
https://dcc.ligo.org/LIGO-T1500502

(And the wiki pages, https://wiki.ligo.org/Calibration/T1500502_Prototype_Info points to the DCC document.)

5. Missing data flags and updated DQ flags are yet to be inserted into the segment database, pending generating these and an OK to proceed.

Here are some important details:

There is no missing H1_HOFT_C01.

There are gaps in L1_HOFT_C01 due to times when there were bad dataValid flags in the raw 64 s L1_R data. These gaps have been reduced down to the times of those raw frames -/+ 16 wings needed for filtering.

The times of the gaps in L1 C01 hoft intersected with L1_DMT-ANALYSIS_READY:1 are:

$ ./compareSegLists.tcl -f1 segs_MISSING_L1_HOFT_C01.txt -f2 segs_L1_DMT-ANALYSIS_READY_1.txt -i -s -T
1127128496 1127128592 96
1127353008 1127353104 96
1127387760 1127387856 96
1127435760 1127435856 96
1127687856 1127687952 96
1128122032 1128122075 43
1128122086 1128122128 42
1128320816 1128320912 96
Total duration = 661 seconds.

The UTC time of raw L1_R data with bad dataValid flags that intersect L1_DMT-ANALYSIS_READY:1 are:

$ ./compareSegLists.tcl -f1 segs_MISSING_L1_HOFT_C01.txt -f2 segs_L1_DMT-ANALYSIS_READY_1.txt -i | awk '{sum = $1 + 16; print sum}' | xargs -l tconvert
Sep 24 2015 11:14:55 UTC
Sep 27 2015 01:36:47 UTC
Sep 27 2015 11:15:59 UTC
Sep 28 2015 00:35:59 UTC
Sep 30 2015 22:37:35 UTC
Oct 05 2015 23:13:51 UTC
Oct 05 2015 23:14:45 UTC
Oct 08 2015 06:26:55 UTC

Most of the above seem associated loss or gain of lock. For example, see the drop out in L1 lock segments near Sep 24 2015 11:14:55 UTC here:

https://ldas-jobs.ligo-la.caltech.edu/~detchar/summary/day/20150924/

Gaps have been filled in when C00 was missing during maintenance days after DMT calibration restarts, but none of these intersect with L1_DMT-ANALYSIS_READY:1

Bottom line: The analysis using the C01 hoft will lose 661 s of L1 ANALYSIS_READY time due to bad dataValid flags.

6. The data is available via NDS2 and using gw_data_find.

Quick test show no issues, e.g., in these example comparison plots between GDS online and DCS offline C01 spectra from Oct 9 (i.e., after Oct. 6 filter updates):

https://ldvw.ligo.caltech.edu/ldvw/view?act=getImg&imgId=99928
https://ldvw.ligo.caltech.edu/ldvw/view?act=getImg&imgId=99929

And for example, calibration factors (which are not applied) now agree too, e.g., for L1:

https://ldvw.ligo.caltech.edu/ldvw/view?act=getImg&imgId=99835
https://ldvw.ligo.caltech.edu/ldvw/view?act=getImg&imgId=99836
https://ldvw.ligo.caltech.edu/ldvw/view?act=getImg&imgId=99839

The calibration group should decide if it wants to do further testing.
 

Back to Observing at ~73Mpc after Robert's work, LLO is still down.

Summary:

We had single-IFO time so I tested the new inverse actuation filter for PCALX. WP5530

Sudarshan and I believe we tracked down the factor of 2 and sign error from the initial PCALX test, see aLog 22160. We wanted to do this test to confirm that.

CBC injections:

The waveform file is: https://daqsvn.ligo-la.caltech.edu/svn/injection/hwinj/Details/Inspiral/H1/coherenttest1from15hz_1126257408.out

The XML parameter file is: https://daqsvn.ligo-la.caltech.edu/svn/injection/hwinj/Details/Inspiral/h1l1coherenttest1from15hz_1126257408.xml.gz

I did three CBC injections. The start times of the injections were: 1128303091.000000000, 1128303224.000000000, and 1128303391.000000000.

The command line to do the injections is:
ezcawrite H1:CAL-INJ_TINJ_TYPE 1
awgstream H1:CAL-PCALX_SWEPT_SINE_EXC 16384 coherenttest1from15hz_1126257408.out 1.0 -d -d >> 20151006_log_pcal.out
awgstream H1:CAL-PCALX_SWEPT_SINE_EXC 16384 coherenttest1from15hz_1126257408.out 1.0 -d -d >> 20151006_log_pcal.out
awgstream H1:CAL-PCALX_SWEPT_SINE_EXC 16384 coherenttest1from15hz_1126257408.out 1.0 -d -d >> 20151006_log_pcal.out

I have attached the log. I had to change the file extension to be posted to the aLog.

DetChar injection:

I injected Jordan's waveform file: https://daqsvn.ligo-la.caltech.edu/svn/injection/hwinj/Details/detchar/detchar_03Oct2015_PCAL.txt

The start time of the injection is: 1128303531.000000000

The command line to do the injections is:
awgstream H1:CAL-PCALX_SWEPT_SINE_EXC 16384 detchar_03Oct2015_PCAL.txt 1.0 -d -d >> 20151006_log_pcal_detchar.out

I have attached the log. I had to change the file extension to be posted to the aLog.