S3 / S4 Investigation Updates:

• Calibrations Mike Landry, Gaby Gonzalez, Brian O'Reilly)
  Gaby reported that there is a new pre-S5 calibration of  ETM actuation functions. A discrepancy reported previously in L1 arm calibrations has been cleared up, and L1 autocal works again, giving excellent agreement with full calibration.
  
• Coherence studies between AS_Q and PEM channels (Nelson Christensen, Sarah Vigeland)
  Sarah summarized recent work on identifying correlations between GW lines found and auxiliary channels, using code developed by Vuk Mandic for the stochastic analysis. Sarah finds a great deal of structure in the correlations between AS_Q and microphones. Robert commented that he wasn't surprised to see these low-level correlations, since the coherences are probing deep down into the noise, below the level at which acoustic mitigation has been carried out so far.
  
• Glitch-finding tool (Nelson Christensen, Hans Bantilan)
  Hans described a matlab-based time-frequency, glitch-finding tool being used to systematically scan auxiliary channels at the times of inspiral triggers. One goal is to provide such a tool for more general use in the control room during science running. Gaby wondered how one would avoid high accidental veto rates and suggested time lag studies. KR asked about keeping up with the data. Hans reported that the program requires 15-20 minutes to scan 97 channels for a 90-second interval. Fred wondered if there is a central repository, analysis to the DQ segments page, for known glitches. KR answered that the LDAS database was meant to serve that purpose, but that many offline triggers (e.g., KleineWelle) are not sent to the database. KR will follow up with the glitch group to see if it's time to start filling the database with such triggers.
• Data quality flag evaluation for the Inspiral analysis (Gaby Gonzalez)
  Gaby reported on a comprehensive evaluation of S4 version 6 H1 DQ flag usefulness for the inspiral analysis, using a series of inspiral notebook entries:
  1  2  3  4  5  6  7  8  9
  Gaby divided the flags among those to be used for selecting segments, for vetoing individual events, or not to be used at all. See entries for details.
• S4 data quality flags (John Zweizig, Keith Riles, Peter Shawhan)
  KR plans to make a version 7 S4DQ release next week, with refined dust intervals from Andri / Alessandra, along with orientation info for Allegro (note added: release made on July 14).

DMT Software Development:

• John Zweizig: Infrastructure status (hardware & software)
  John reported that the new DMT machines (Quad opterons) have arrived at the observatories. Dave Barker and Tom Evans are working to get them installed. Tom is also working on getting a new GNU installation to support automakes. John is heading to LHO Wednesday to start commissioning those machines. John has installed the newest DMT release on decatur, to allow more efficient online development at LLO. John also mentioned that he is working on an interface to Duncan's new segments database, to allow real-time setting of DQ flags in S5. He will announce that feature to the dmt-discuss mailing list when it's ready. KR reminded everyone that new DMT trend names are needed and should be implemented by July 25.
• Soma Mukherjee / Roberto Grosso: Mean-Baseline-Tracking monitor
  No update
• John Whelan / Mark Cenac / Brian O'Reilly: StochMon
  Had to leave early for hurricane evacuation.
• Giovanni Santostasi: PulsarMon
  Giovanni reported by e-mail that he had made more code changes, but has been unable to test them because of decatur's obsolete (non-EZCalibrate) installation (now fixed - see above) and an ssh incompatibility between fortress and his McNeese computer.

• White Paper contributions due today!
• Next meeting: Friday July 29 at 1:30 p.m. EDT (S4 investigations, DMT status / plans, White Paper)