S4 Investigation Updates:

• Calibrations Mike Landry, Gaby Gonzalez, Brian O'Reilly)
  Gaby reported that work continues steadily on finalizing the S4 calibration. Meanwhile the systematic uncertainties on the final S3 calibration have now been estimated and documented. The range of errors are estimated to be 15-18\% on L1, about 9\% on H1, and 4-10\% on H2 ampliutdes. All phase errors are estimated to be six degrees or less. Comments on the final S3 calibration report are welcomed. This report will serve as the template for future S4+ reports.
  
  
• Spectral lines Line-finding report   Spectral line lists (Keith Thorne)
  KeithT presented the first release of a spectral line catalog from the S4 run, based on a variety of sources. A number of formatting improvements to the tables are planned, and help is requested from all on identitifying features.
  
  
• Glitch investigations (Laura Cadonati, Erik Katsavounidis)
  Laura and Erik couldn't make the telecon, but Peter Shawhan mentioned that he will be producing light-dip DQ intervals soon, based on 2-3 different thresholds. Alessandra Di Credico has found the light-dip intervals at even the lowest threshold to be quite useful.
  
  
• E12 data quality flags (John Zweizig, Keith Riles, Peter Shawhan)
  KeithR mentioned a quick E12DQ release made earlier in the day to correct a flag name describing the Allegro orientation. John Whelan mentioned he will soon provide information on Allegro orientation during the S4 run.

DMT Software Development:

• John Zweizig: Infrastructure status (hardware & software)
  John reported that he expects the new online DMT machines to arrive at the end of June. He will go out to the sites shortly afterward to do the installation. He is working right now with Junwei Cao on merging the online/offline DMT versions for a consistent automake configuration. Junwei has gotten things to work under linux, and John is trying to implement it on Solaris.
  
  
• Soma Mukherjee / Roberto Grosso: Mean-Baseline-Tracking monitor
  Soma reported that Roberto continues work on getting online DMT infrastructure working. He has had trouble with online plotting and has exchanged e-mails with JohnZ. He and Soma plan to visit LLO for about a week in July and hope to overlap with John's visit.
  
  
• John Whelan / Mark Cenac / Brian O'Reilly: StochMon
  John reported that there has been recent code cleanup to remove compilation warnings. PSD reading is now robust offline and will soon be tested online. He and Marc are preparing for a StochMon version that uses actual spectra from both IFO's in a pair (instead of using a reference spectrum from one). They will implement it first for H1/H2 since those data channels are easy to bring together online. They hope that a LIDAX-based DMT infrastructure will be ready before S5 to allow the same code to be used for H1/L1 and H2/L1, but as a fallback they plan to implement another scheme in which monitors write out temporary PSD's each minute at both sites; a script copies them over to the other site, and then the corresponding monitors read in and report on the previous minute's FOM. This scheme has the additional virtue that one can recover the essential info from the PSD's and check results with an independent MATLAB program. John is also thinking ahead to a "stochastic analysis warroom" in which daily / weekly reports of actual sensitivity will be desirable. He may try to run his MATLAB programs under ONASYS (or simply under condor at PSU, as KeithT suggested).
  
  
• Giovanni Santostasi: PulsarMon
  Giovanni reported that he has recovered some long-lost files on the alvar machine, which should allow him to resume work on the EZCalibrate interface to PulsarMon. He has been trying without much success to compile the EZCalibrate verion on decatur. After some discussion it became clear that decatur's DMT installation is too old to be compatible with EZCalibrate. Giovanni will work instead on fortress at LHO or on a Caltech machine for now. In the meantime, KeithR and John will talk to Shannon Roddy at LLO to see about making it easier to keep decatur (GC machine) at least as up to date as fortress. Giovanni confirmed that he has fixed the problems encountered in early S4 with plots of known-pulsar FOM's.

• Next meeting: Friday June 24 at 1:30 p.m. EDT (S4 reports and DMT status / plans)