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Homestake Meeting Minutes, 08/24/17

Attending: Vuk, Andrew, Daniel, Ross, Victor


  • Next Meeting: Vuk will do a doodle poll, but Wed 11am central seems good.
  • Data analysis topics
    • Data corrections, frame production (Gary/Daniel/Pat)
      • Daniel: timing hiccups from last week, timing off by 1/4 of a second especially when a station is reset.
        • Daniel made a list of all times that are questionable, will try to see how this correlates with time channels. There are of order 30-40 glitches in different stations, but they may correlate with times when timing channels were known to be bad.
      • Is IRIS data updated? Daniel checked, does not look updated… Will check with Gary how to proceed.
    • Event catalog (Gary/Ross)
    • Radiometer updates (Pat, Andrew) pdf
      • Estimation of Newtonian noise at different depths, will present some of it at the LIGO-Virgo collaboration meeting next week.
    • Parameter estimation for Rayleigh and Love (Pat)
    • Teleseismic events and Wiener filtering (Daniel, Michael)
    • Very-long-periods (Ross)
    • Velocity from noise correlations (Daniel)
      • Model selection?
    • Pull together all velocity measurements to start making comparisons (all)
  • Papers
    • Homestake Array Summary paper: pdf
      • Leads: Vuk, Gary, Victor
      • target: Seism. Research Lett., 6000 words, 10 figures.
      • Vuk: addressed comments from Jan, Riccardo, and LIGO internal review, should be ready for submission. Will send one last email to get Gary's approval, as he was not present today.
  • Active excitation overview paper
    • Leads: Gary, Ross
    • Others: Victor, Daniel,…
    • Will discuss at the next call.
  • Surface Active Excitation
    • Leads: Victor, Boise
    • Others: Gary, Ross
    • Plan to invite the Boise group to give us a presentation in Sep or Oct 2017, when they are ready with their paper.
  • Underground Active Excitation:
    • Lead: Gary, Ross
  • Parameter estimation for the Rayleigh and Love eigenfunctions (amplitude vs depth dependence).
    • Leads: Pat, Daniel
    • Also contributing: Victor, Vuk, Levi
    • Novel, but maybe insufficient for a publication. Could use the eigenfunction measurement for Rayleigh and assume something about Rayleigh field to make preliminary estimates of the Newtonian noise.
  • Estimating directional and modal composition of the seismic noise. (Pat, Levi, Vuk)
    • Leads: Pat, Vuk, Levi
  • Wiener filter application
    • Leads: Jan, Michael
    • Aim for late August.
  • Teleseismic EQs and near-surface scattering
    • Leads: Daniel, Victor
  • Time-variable velocity changes
    • Lead: Victor, not started yet
  • Very low frequency harmonics (Ross)
groups/homestake/meetings/20170824.txt · Last modified: 2017/08/24 11:52 by mandic