Meetings

• Meeting time: 13:00-13:30 JST/KST on every Monday
• Meeting room: Zoom

Agenda & Minutes

20220620 (Mon.)

• Agenda
  • Announcement

    • LIGO DetChar F2F is July 18-19 with noise sprint July 20-22. In person + remote style wiki
  • KAGRA commissioning reports (Yokozawa)
  • Unify conda environment in Kamioka detchar computers, k1sum[01] and k1det[012] (YamaT)
  • DQR update (Yuzurihara)
  • Update contents of summary page? (Oshino)
  • Combine DET computer resources into one DET cluster at Kamioka site

20220613 (Mon.)

• Agenda
  • Announcement

    • LIGO DetChar F2F is July 18-19 with noise sprint July 20-22. In person + remote style wiki

    • New paper about DQ for pyCBC arXiv

  • KAGRA commissioning reports (Yokozawa)
  • Unify conda environment in Kamioka detchar computers, k1sum[01] and k1det[012] (YamaT)
  • DQR update (Yuzurihara)
  • Update contents of summary page? (Oshino)
  • Combine DET computer resources into one DET cluster at Kamioka site
• Minutes
  • KAGRA commissioning reports

    • Explained by Yokozawa-san see KAGRA detector status220613

  • Unify conda environment in Kamioka detchar computers, k1sum[01] and k1det[012] (YamaT)
  • DQR update (Yuzurihara)

    • Task to compute inspiral range is running on k1det1 klog#20986

  • Update contents of summary page? (Oshino)

    • Updated DetChar and VIS tab klog#21060

20220606 (Mon.)

• Canceled due to conflict with KIW9

20220530 (Mon.)

• Agenda
  • Announcement

    • The 9th KAGRA International Workshop (KIW) web (registration by May 31, 2022)

    • JPS meeting : registration by June 2 web

      • Question : Someone should present the status of DetChar and activity toward O4?

    • LIGO DetChar F2F is July 18-19 with noise sprint July 20-22. In person + remote style wiki

    • Final KAGRA report at OpsDiv call was done at May. 26, 2022 slide for May 26

  • KAGRA commissioning reports
  • Unify conda environment in Kamioka detchar computers, k1sum[01] and k1det[012] (YamaT)
  • DQR update (Yuzurihara)
  • Update contents of summary page? (Oshino)
  • Combine DET computer resources into one DET cluster at Kamioka site
• Minutes
  • KAGRA commissioning reports

    • Pumping down of EY started at 2022 May 24 9:45~ klog#20851

    • Pumping down of IY started at 2022 May 25 9:35~ klog#20874

  • Unify conda environment in Kamioka detchar computers, k1sum[01] and k1det[012] (YamaT)
    • hveto worked with omicron triggers generated by a new version of Omicron
      • There seems to be no compatibility between omicron version we use and one in igwn-py39.

      • There may be also no compatibility between SummaryPages we use and omicron in igwn-py39.

      • If so, we need to move igwn-py39 for all tools (SummaryPages, omicron, hveto etc.)

      • SummaryPages in igwn-py39 had worked well in gps mode (reported a few weeks ago).

      • TY want to gather the volunteer to test SummaryPages in daily mode.

    • gwpy can use 'NDSSERVER' environmental variable
      • We don't need to do the code hack for nds2.py in gwpy.

    • (Yuzu) In DAC call, I heard that operation test of gw_data_find is on-going on m31 by Compu&Soft members. It may be available in a few week.

  • DQR update (Yuzurihara)
    • I prepared the code of one task to compute inspiral range at the time of GW alert.

    • I send the merge request git repo and will take the review.

  • Update contents of summary page? (Oshino)

    • Update SummaryPages web server by YamaT klog#20926

20220523 (Mon.)

• Agenda
  • Announcement
    • New accounts for accessing LIGO resources (registration by May 22)

    • The 9th KAGRA International Workshop (KIW) web (registration by May 31, 2022)

    • Final KAGRA report at OpsDiv call is planned at May. 26, 2022 slide for Mar 31slide for Feb 17

    • JPS meeting : registration by June 2 web

  • KAGRA commissioning reports
  • Unify conda environment in Kamioka detchar computers, k1sum[01] and k1det[012] (YamaT)
    • call for volunteers from remote site, to test hveto and FScan. Please let us (Yuzuriahra or YamaT) know.
  • DQR update (Yuzurihara)
  • Update contents of summary page? (Oshino)
  • Combine DET computer resources into one DET cluster at Kamioka site
• Minutes
  • KAGRA commissioning reports
    • In-air health check for suspensions (ITMY, ETMY) was by Ushiba and other members.
    • On last Friday, we had the acceptance check to close the chamber for Yarm. It passed.

    • ADC glitch problem on many suspensions by YamaT klog#20815

  • Unify conda environment in Kamioka detchar computers, k1sum[01] and k1det[012] (YamaT)
    • hveto itself worked without no additional code hack.
    • Compatible error in trigger file format was occurred

      • The 'peak' columns have incompatible types: ['object', 'float64', 'float64']

      • In TY's remember, Kozakai-san faced and solved same problem...(?)
    • TY want to re-arrange cluttered O3-segments including test ones.

    • (Yuzu) This error is related to klog#19846 ?

  • DQR update (Yuzurihara)
    • no update
  • Update contents of summary page? (Oshino)

    • Updated VIS page. see klog#20814

  • Analysis of transient signals of IMMT1 (Aogaku members)

    • klog#20793

20220516 (Mon.)

• Agenda
  • Announcement

    • Vigo DetChar paper arXiv

    • The 9th KAGRA International Workshop (KIW) web (registration by May 31, 2022)

    • GWADW2022 web (registration closed)

    • The GRAvitational - wave Science&technology Symposia (GRASS 2022) web (registration closed)

    • (Final) KAGRA report at OpsDiv call is planned at May. 26, 2022 slide for Mar 31slide for Feb 17

  • KAGRA commissioning reports
  • Unify conda environment in Kamioka detchar computers, k1sum[01] and k1det[012]
    • call for volunteers from remote site, to test hveto and FScan. Please let us (Yuzuriahra or YamaT) know.
  • DQR update (Yuzurihara)
  • Update contents of summary page? (Oshino)
  • Combine DET computer resources into one DET cluster at Kamioka site
  • Report of new tool development? (Darkhan)
  • Glitch subtraction survey for O4
    • see mail from Davis Derek (2022 May 3)
    • deadline : May 16
    • The glitch subtraction activities are managed under DET.

    • current summary

• Minuts
  • Announcement

    • If you talk about DetChar activity, please let chairs know

  • KAGRA commissioning reports

    • In-air health check for suspensions (ITMY, ETMY) is on-going by Ushiba klog#20724 klog#20729

    • Turned "ON" two radiation shield coolers for EXC. But, on Sunday, it turned off due to mistake klog#20712 klog#20736

  • DQR update (Yuzurihara)

    • Operation test for DQR application is on-going on DetChar dedicated machine

    • From last Wednesday, the alert from MDC stopped (I'm not sure this is scheduled or not...)
      • That is because 1st period of MDC finished
    • The code review will start gradually

    • You can see the summary report of MDC alert on GraceDB

  • Unify conda environment in Kamioka detchar computers, k1sum[01] and k1det[012]
    • FScan cannot find IGWN.
      • YamaT plan to use it which is a part of lalpulsar packages.
    • Trigger files are required for hveto test.
      • YamaT plan to do the consistency check with O3 triggers and the configuration file.
      • Trigger files are on the DET file server and they must be mounted from the test server.
      • Oshino-san will share a past configuration file.
  • Update contents of summary page? (Oshino)
    • summary page is working well
  • Combine DET computer resources into one DET cluster at Kamioka site
    • no update
  • Report of new tool development? (Darkhan)
    • debugging code

20220509 (Mon.)

• Agenda
  • Announcement
  • KAGRA commissioning reports
  • Unify conda environment in Kamioka detchar computers, k1sum[01] and k1det[012]
    • call for volunteers from remote site, to test hveto and FScan. Please let us (Yuzuriahra or YamaT) know.
  • DQR update (Yuzurihara)
  • Update contents of summary page? (Oshino)
  • Combine DET computer resources into one DET cluster at Kamioka site
  • Report of new tool development? (Darkhan)
  • Glitch subtraction survey for O4
    • see mail from Davis Derek (2022 May 3)
    • deadline : May 16
    • The glitch subtraction activities are managed under DET. I would like to ask regular report in DET meeting.
• Minuts
  • Announcement
  • KAGRA commissioning reports

    • ADC noise measurement klog#20658

    • In-air health check for Yarm suspensions (ITMY and ETMY) is on-going.
      • If no problem, review will be done next week and pumping down will start on week of May 23
  • DQR update (Yuzurihara)
    • no update
  • Report of new tool development? (Darkhan)
    • add channel list?

20220502 (Mon.)

• Agenda
  • Announcement
  • KAGRA commissioning reports

    • PRM cause the glitch in IMMT1 OPLEV signal and POP forword QPD signal klog#20539

    • In-air health check for suspensions (ITMY, ETMY) is on-going by Ushiba klog#20631 klog#20632

  • Unify conda environment in Kamioka detchar computers, k1sum[01] and k1det[012]
    • call for volunteers from remote site, to test hveto and FScan. Please let us (Yuzuriahra or YamaT) know.
  • DQR update (Yuzurihara)
  • Update contents of summary page? (Oshino)
  • Combine DET computer resources into one DET cluster at Kamioka site
  • Report of new tool development? (Darkhan)
  • Data Quality flag for O4a
    • We are asking the concrete requirement for DAC members (CBC, burst, Stochastic)
    • This is related to discuss the ER period and time
  • Analysis of TCam photos of ITMY and ETMY with the metal scale by Tcam
• Minutes
  • Announcement

    • GWADW2022 web

    • The 9th KAGRA International Workshop (KIW) web

    • The GRAvitational - wave Science&technology Symposia (GRASS 2022) web

  • DQR update (Yuzurihara)
    • no update.
  • Unify conda environment in Kamioka detchar computers, k1sum[01] and k1det[012]
    • no update
  • Update contents of summary page? (Oshino)

    • klog#20634

  • Analysis of TCam photos of ITMY and ETMY with the metal scale by Tcam klog#20574

    • analysis is on-going by Aogaku students. Report will appear soon.

20220425 (Mon.)

• canceld

20220418 (Mon.)

• Agenda
  • Announcement
    • monthly maintenance for JGWDoc + JGW wiki + klog on April 18 13:00-16:00 JST.
  • Unify conda environment in Kamioka detchar computers, k1sum[01] and k1det[012]
    • call for volunteers from remote site, to test hveto and FScan. Please let us (Yuzuriahra or YamaT) know.
  • DQR update (Yuzurihara)
  • Update contents of summary page? (Oshino)
  • Combine DET computer resources into one DET cluster at Kamioka site
  • Report of new tool development? (Darkhan)
• Minutes
  • Unify conda environment in Kamioka detchar computers, k1sum[01] and k1det[012]
    • No updates in last week.
    • Some volunteers for testing of hveto, fscan are sitll wanted.
    • We should start to test also iDQ from now on for future observing runs (O5, O6...)
  • DQR update (Yuzurihara)
    • operation test for tools is on-going without error and trouble
  • Update contents of summary page? (Oshino)
    • no update
  • Combine DET computer resources into one DET cluster at Kamioka site
    • no update
  • Report of new tool development? (Darkhan)

    • slide

  • 120Hz glitches investigation during O3GK

    • configuration file

20220411 (Mon.)

• Agenda
  • Announcement

    • Workshop 2022/04/15 web page

      • DetChar talk is planed by Yokozawa. When he circulates slide, put comments on slide.

  • Unify conda environment in Kamioka detchar computers, k1sum[01] and k1det[012]
    • call for volunteers from remote site, to test hveto and FScan. Please let us (Yuzuriahra or YamaT) know.
  • Exchange of opinions between DET members(YamaT, Sawada(OPS), Yuzurihara) and DMG members(Kanda, Oohara)
  • DQR update (Yuzurihara)
  • Update contents of summary page? (Oshino)
  • Combine DET computer resources into one DET cluster at Kamioka site
    • (Oshino) explain idea, goal, and timeline
  • Report of new tool development? (Darkhan)
  • Follow-up report of remote contribution from Aoyama Gakuin univ.
• Minutes
  • Unify conda environment in Kamioka detchar computers, k1sum[01] and k1det[012]
    • no volunteer yet (Test of hveto and FScan).
      • Coding kagradata.py for the new version of Bruco is ongoing.
      • We need to decide KAGRA common rule about NDS2 and DATAFIND for fixing codes.
    • NAPT test was started for the purpose of saving number of IP address in DGS network.
      • DET gateway (copy of k1gate is enough for the test) will be connected to DGS network.
        • Other nodes will be under DET gateway.
      • It may be better to construct the gateway as Deb10. (Copy of k1gate is Rocky8)
        • TY have no experience of constructing NAPT on Debian.
      • NDS(k1nds[012]), NFS(k1nfs0) services must be available from under DET gateway.
      • How should we do k1det2 which is used for Bruco running from CDS workstation.
  • Exchange of opinions between DET members(YamaT, Sawada(OPS), Yuzurihara) and DMG members(Kanda, Oohara)
    • related to conda environment and DQR tasks
    • in Kashiwa server and Kamioka computers, we should have common rule fo NDS2 and DATAFIND, which YamaT already mentioned.
  • DQR update (Yuzurihara)
    • the application to connect between igwn-alert and Task Manager was developped by Joe

    • DQRAlert git repo

    • I tried to run this tool in Kamioka computer and it is working well.
    • need to prepare the document of how to use this tool on wiki page.

    • DQR workflow

  • Update contents of summary page?
    • no update
  • Combine DET computer resources into one DET cluster at Kamioka site
    • goal : prepare job management server and can submit job to k1det[012]
    • timeline : before O4
    • there might be conflict between this cluster and NAPT test. Oshino and YamaT will discuss.
  • Follow-up report of remote contribution from Aoyama Gakuin univ.
    • (Yokozawa, Oshino, Yuzurihara) we started the discussion of task list and how to contribute from remote site.

20220404 (Mon.)

• Agenda
  • Announcement

    • DQR design document, put comments on git issue

    • Workshop 2022/04/15

      • Workshop on the development of innovative tools for new collaborations within gravitational wave detection experiments

    • KAGRA's authorship submission. For details, see [kagra 05009]. Deadline April 8 17:00 JST
  • Unify conda environment in Kamioka detchar computers, k1sum[01] and k1det[012]
  • DQR update
  • Update of summary page
  • Trouble of Omicron trigger generation
  • 120Hz glitches investigation during O3GK
• Minutes
  • Unify conda environment in Kamioka detchar computers, k1sum[01] and k1det[012]
    • Installation of IGWN was done on k1detfs.
      • Too slow HDD response? (~150KB/s via NFS)
    • Works well

      • SummaryPages as GPS-select mode

        • ini-file grammar is slightly changed from the old version.
      • Omicron
        • No special hack
      • Omega-scan
        • needs temporal code hack
      • Bruco
        • needs preparation for reading kagra data (kagradata.py)

        • No --include option in original one.

    • Not yet

      • SummaryPages as Daily mode (This will be done by Kamioka people)

      • hveto
      • FScan
        • Not included in IGWN environment?
    • Problem

      • No global NDS2, DataFind servers or equivalent way.

        • SSH port forwarding is not enough because port number is different depending on person.
        • So I cannot do the code hack on IGWN software in the system region.
      • KAGRA env may not be able to be included in IGWN until O4.
        • If so, we shouldn't use IGWN in officially for O4.
    • (Lupin) igwn-py38? or py39?
    • YamaT asked status of FScan
    • In future, we need to prepare similar environment on Kashiwa cluster. The environment is not completely same as Kamioka computers.
    • We need volunteers from remote site, to test hveto and FScan. Please let us (Yuzuriahra or YamaT) know.
  • DQR update (Yuzurihara)
    • Operation test for new version of Task Manager is on-going on k1det1.

    • I found that code of stationary task uses datafind to read gwf data, which we don't have.

    • I need to consider how to read data for DQR tasks.
      • (Darkhan) Is there any way to get the latest list of channels?
      • (Yuzurihara) If you can specify the name of frame data, there is a function on gwpy.
  • Update of summary page (Oshino)
    • no update
  • Trouble of Omicron trigger generation (Oshino)

    • klog#20328

    • replaced the local SSD on k1sum1. The Omicron triggers are stored in different disk.
  • 120Hz glitches investigation during O3GK
    • no update
    • Kihyun can't join for a while. This project will be postponed.
  • Report of new tool development (Darkhan)
    • showed demonstration
    • this tool can take a ratio between channels and will be able to apply time-domain filter (band pass/highpass/lowpass) in future.

20220328 (Mon.)

• Agenda
  • Announcement

    • DQR design document, put comments on git issue

    • Workshop 2022/04/15 Workshop on the development of innovative tools for new collaborations within gravitational wave detection experiments

  • Unify conda environment in Kamioka detchar computers, k1sum[01] and k1det[012]
  • Activity report by students from Aoyama Gakuin univ.
    • glitch investigation related to IMMT1 oplev (Aoyama Gakuin univ.)
    • Tcam image analysis to identify mirror location and center (Aoyama Gakuin univ.)
  • DQR update
  • Update of summary page
  • 120Hz glitches investigation during O3GK

• Minutes
  • Unify conda environment in Kamioka detchar computers, k1sum[01] and k1det[012]
    • YamaT constructed the test environment in local computer

    • Although YamaT is copying the environment to DetChar computers, it is very slow. (speed ~ 250KB/s)

    • After copying, YamaT will work on modification of codes to fit KAGRA data, such as nds2.py
    • For testing the tools (Omicron, Hveto...), we need volunteers, especially remote site!
  • Activity report by students from Aoyama Gakuin univ.
    • five students and two staff members from Aoyama Gakuin univ. stayed Kamioka site during last three weeks.

    • They helped commissioning work both in tunnel klog#20124 klog#20155 and in control room.

    • several code developments to understand glitch cause have been done. klog#20026 klog#20027

    • code development to identify mirror center of ITMX have been done by using image analysis. slide(Japanese) klog#20036 klog20198 klog#20203

  • DQR update
    • Joe updated Task Manager. Yuzurihara will install new version and test it.
  • Update of summary page
    • no update
  • 120Hz glitches investigation during O3GK
    • no update

20220307 (Mon.)

• Agenda
  • announcement

    • LVK meeting March 2022 wiki web

      • registration is available
  • 120Hz glitches investigation during O3GK
  • unify conda environment in Kamioka detchar computers, k1sum[01] and k1det[012]
  • DQ flags for O4
  • DQR update
  • glitch investigation related to IMMT1 oplev

• Minutes
  • 120Hz glitches investigation during O3GK
    • no update
  • unify conda environment in Kamioka detchar computers, k1sum[01] and k1det[012]
    • YamaT is working on this project at test-server.
    • Test of new conda environment will start from next week (after JPS meeting)
  • DQ flags for O4
    • no update
  • DQR update

    • Joe is developing the code to connect between igwn-alert and TaskManager. It will be available soon.

    • Schedule for review
      • Review of Task Manager will be done before review of each task.
      • High priority task needs to complete before Aug. 2022
      • Low priority task needs to complete before Nov. 2022
  • glitch investigation related to IMMT1 oplev
    • From March 8, students from Aoyama Gakuin univ. stayed at Kamioka

    • They worked on the investigation of glitch. klog#20026klog#20027

    • They checked IMMT1 QPD signals and PRM suspension signals at the time of glitch.
  • NDS2 tool development (Darkhan)
    • no major update.
  • GPS accuracy monitor (Oshino)

    • is available on summary page

    • Current difference is acceptable and reasonable.
  • No meeting on March 21 due to Japanese holiday. Next meeting is planed on March 28.

20220307 (Mon.)

• Agenda
  • announcement

    • RRT plan during O4 slide

    • LVK meeting March 2022 wiki web

      • registration is available
  • 120Hz glitches investigation during O3GK
  • unify conda environment in Kamioka detchar computers, k1sum[01] and k1det[012] (YamaT)
  • DQ flags for O4
  • DQR update
• Minutes (Yuzurihara)
  • 120Hz glitches investigation during O3GK
    • no update
  • unify conda environment in Kamioka detchar computers, k1sum[01] and k1det[012] (YamaT)
    • There are many computers/workstations in Kamioka site or Kamioka control room.
    • Workstations (k1ctr*) use common conda environment by mounting the file server.

    • In DetChar computers k1{sum,det}[01], conda environment should be unified all DetChar resources, similar to workstations.

    • To prevent the trouble that DetChar experts might break the environment, the conda environments will be set as read-only permission.

    • Installation will be done by Kamioka members. After that, we need volunteers to test the DetChar tools on new conda environment.

    • what is the time line?
      • Installation will finished before the end of March. From April, the test will start. Volunteers are helpful.
  • DQ flags for O4

    • In last PEM meeting, Yuzurihara presented the current status and received the helpful comments. [slide](https://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=13970)

    • We will change our plan to construct the data quality flag and will compute the BLRMS of gwpy to set the threshold.
    • The review is necessary before O4. (probably very close to O4, because we need ER)
  • DQR update
    • no update
  • Commissioning of GreenX
    • In the last weekend, the commissioner tried continuous GreenX. During that trials, they found many short term lock loss (~10 ms). 10 ms is too short to follow the suspension motion, so it is likely that there are some causes of the lock loss except for the suspension motion.

    • The commissioner needs helps DetChar members to identify the cause or give a hint of the cause.

    • For details, see klog#19963 klog#19983

    • main channel K1:TMS-X_GR_PDA1_OUT_DQ
    • time : 2022 Mar 06 23:37:50 UTC = 2022 Mar 07 8:37:50 JST = GPS time 1330645088

20220228 (Mon.)

• Agenda
  • 120Hz glitches
  • DQ flags for O4
  • progress of DQR
  • lock loss study of GreenX
• Minutes (Yuzurihara)
  • accouncement

    • LVK meeting March 2022 wiki web

      • registration is available
      • Wed, 17 March 2021:
        • Plenary Session #1 (09:00-10:30 US/CDT) (=3/16 23:00 JST)
        • Paper Presentation Session #1
        • Plenary Session #2 (16:00-17:30 US/CDT) (=3/17 6:00 JST)
      • Thu, 18 March 2021:
        • Plenary Session #3 (09:00-10:30 US/CDT) (=3/17 23:00 JST)
        • Paper Presentation Session #2
        • Plenary Session #4 (16:00-17:30 US/CDT) (=3/18 6:00 JST)
    • Pastavi server will be unavailable tonight

      • klog#19913

  • 120Hz glitches
    • no update
  • DQ flags for O4
    • no update
  • progress of DQR
    • igwn-alert is running more than 9days and receiving the MDC alert

    • next step is to connect the MDC alert with the launch TaskManager.

    • remained task is to develop InspiralRange issue

  • lock loss study of GreenX

    • klog#19906

    • From the Hveto result, the channel (K1:IMC-SERVO_MIXER_DAQ_OUT_DQ) was the most coincident channel with the lock loss of GreenX.
  • unify the detchar computing environment (YamaT)
    • scattered codes and applications (Omicron, summary page, ) over Kamioka computers are troubling.
    • we plan to unify the environment by using igwn conda
    • detail will be reported in next meeting
    • (Darkhan) conda environment on k1ctr*. someone accidentally update someone's conda environment. administrator should prepare the conda environment?
    • (YamaT) k1ctr* share the environment. this activity is not related to k1ctr* but k1sum[01], k1det[012]. we should separate the user environment and the environment for the DET tools
    • (Darkhan) should avoid accidental mistake.

20220221 (Mon.)

• Agenda
  • 120Hz glitches
  • DQ flags for O4
  • progress of DQR
• Minutes
  • 120Hz glitches
    • No updates
  • DQ flags for O4
    • No updates
  • progress of DQR

    • klog#19847

  • Proposal new tool to see past data by NDS (Darkhan)

20220207 (Mon.)

• Agenda
  • 120Hz glitches

  • Report from LIGO Detchar F2F Meeting

  • DQ flags for O4
  • progress of DQR
• Minutes
  • 120Hz glitches
    • No updates
  • DQ flags for O4

    • slide

    • (Yuzurihara) read BLRMS data and made the several plots with 1% and 99% percentile.
    • When KAGRA will be locked as observation mode?
      • hopefully after july, there will be lock trial for two monthes(?)
    • When you set the 1% criteria, always you throw away the 1% data?
      • We might need to consider the better procedure to care that point.
  • progress of DQR

    • klog#19671

20220131 (Mon.)

• Agenda
  • 120Hz glitches
  • Report from DQR hackathon
  • DQ flags for O4
  • Master thesis (Morisue-san)

20220117 (Mon.)

• Agenda
  • 120Hz glitches
  • ITMX glitches
  • DQR progress
  • DQ flags for O4
• Minutes
  • 120Hz glitches
    • No updates
    • Next step is coincidence search with signals around ETMY including local control sensors.
  • ITMX glitches

    • klog#19212

    • K1:VIS-ITMX_F3_LVDTINF_GAS_{IN1,OUT} have glitches.
    • It seems to occur around AA chassis. (AA and cable replacement didn't help to improve situation).
    • We will try to find glitches on other channels on the same ADC board.

    • This channel should be added to Omicron search on SummaryPages.

  • DQR progress

    • JGW-G2213721

  • DQ flags for O4
    • No updates
  • O3GK paper
    • Threshold used for computing a glitch rate was changed as SNR=6.5.
    • It's a same criterion with LIGO, and Virgo.
    • Both GEO and KAGRA's results are now computed and draft was also updated.

Past meeting

• 2021

• 2020

• 2019