Caltech: Mours, Shawhan, Yamamoto
     Louisiana Tech: Greenwood
     LHO: Mavalvala, Raab, Rahkola, Savage, Whitcomb
     Michigan: Riles
     MIT: Sylvestre
     Oregon: Schofield

Introduction - KR

• (Because of the Amaldi meeting and summer vacations, more persons than usual are reporting by e-mail this week.)
• DMT monitor developers are reminded of the upcoming E5 run (August 3-6). New monitors and improved old monitors are strongly encouraged. In particular, adding an interface to the DMT viewer to existing monitors should be high priority. Providing an html summary page is also welcome, along with more documentation on how monitors work and what their outputs mean.
• There have been a handful of requests to give talks in the detchar sessions at the upcoming LSC meeting (August 13-16). In addition, all E3/E4 investigation team leaders will be put on the agenda to give reports. Final E3/E4 written reports will be due at the August meeting. These should be separate from any E5 reports to be written up in the future, but time will be made for any preliminary E5 reports that are ready in time.
• KR plans to show at the meeting a status table of DMT monitors like that shown at the March meeting, with columns for the various features that the monitors support. As a carrot to developers, all changes in the table between March and August will be highlighted in bold color.
• Similarly, tables will be shown that list the status of E2 and E3/E4 investigation reports with columns for preliminary telecon reports, oral reports at LSC meetings, and final written reports. (Click here to see the current E2 final reports web page.)
• Another teleconference will be held in two weeks (Friday July 27), mainly to discuss E5 preparations, but preliminary E3/E4 reports are welcome too, as this will be the last detchar telecon before the August LSC meeting.

• Data integrity - P. Shawhan

Peter has been looking at data in the HPSS archive to find global problems in data recording/transfer. Examining raw data along with the second and minute trends from engineering runs E2-E4, he has found five different classes of problems that recur:
• 1) Second-trend files missing from archive. The omissions were due to the manual process now used for ingesting into the archive and have now been fixed by Stuart Anderson.
• 2) Gaps in the raw data because of DAQ reboots. These typically last about a minute. Because second-trend files are written once/minute, there is usually a 1-2 file gap for those, with no gap in minute-trend files, which are written once/hour.
• 3) However, the DAQ system pads the trend files with leading zeroes after a reboot, meaning that up to a minute of zeroes can appear in a second-trend file and up to an hour of zeroes in a minute-trend file.
• 4) There were sporadic truncations of minute-trend files, making them unreadable. Several hours from E2-E4 were lost as a result. The problem (due to a timing mismatch) has been identified and fixed.
• 5) There are occasional short segments of second-trend data where all channels examined are zero. This is not yet understood, but affects a very small fraction of the data.
Peter remarked that his data checking to date has been quite tedious because it's done manually. We need automated checking as part of data ingestion. A natural place for such checking is in the LDAS data ingestion API, which hasn't yet received much programming attention.
Peter also mentioned that all of the data is available via the getframes utility and soon will be available via Lidax (see below). Lidax will provide lists of known contiguous data segments to handle the sort of gaps found above.

• Interferometer configurations - S. Whitcomb
• It's reasonably likely that the Hanford 2km IFO will be in a full recycled, recombined mode, giving us the first engineering data in that configuration. The 2K is nearly back to its pre-earthquake state.
• It's unlikely that either of the 4K IFO's will have any arms locked in time, given recent shutdowns. Their mode cleaners may be operational, however.
• Common-mode, feed-forward tidal actuation (acts on reference cavity temperature) has been tested on the 2K and is tentatively calibrated at about the 20% level. Differential-mode tidal actuaction will require some more hardware and software work to be ready by E5.
  
  
• Investigations, scientific monitoring shifts, and DMT monitors - KR
• Investigation teams are forming up with the E3/E4 lineup as defaults. A preliminary list will be posted next week.
• Many scientific monitoring shift slots remain to be filled for E5, especially at Hanford. More volunteers are requested. A preliminary shift list will be posted next week.
• An E5 telecon will be held Friday July 27 at 11:00 a.m. EDT at which investigation leaders will be asked to summarize briefly their plans and to make any final special requests for running conditions.
• Any new or revised DMT monitors to be run centrally by the process manager during E5 should be given to John Zweizig no later than Friday July 27.

• Daniel has very nearly completed the Lidax package, which allows flexible data access from various sources, including the hpss archive, the observatories and local files. A prototype version is now available for testing on fortress and will be released for wider use soon. A quick-start guide is available.

• General - J. Zweizig (attending Amaldi meeting, reported by e-mail)

John has finished a new trigger-directed data analysis environment class (TrigEnv). It's similar to the standard DatEnv class, but it reads data offline from epochs instead of from an infinite stream. The epochs are taken from an xsil table (e.g., produced by guild). A preliminary template monitor is available on Caltech computers.
A new major DMT release is planned soon that will include these changes and DTT-related changes (see below). It will also include Masahiro Ito's histogram class, Dave Chin's revised operational state conditions, and Ed Daw's IIR filter class (see below).
 
• Merging with DTT - D. Sigg, J. Zweizig (attending Amaldi meeting, reported by e-mail)

Daniel and John are putting together a combined version of the GDS code with the DMT and DTT better integrated via a merged source tree. The DMT/DTT integration will also include the present DTT calibration infrastructure. In the farther future, plotting tools used now by the DTT and DMT viewer will be made available on the root command line.
 
• Histogramming - M. Ito (reported by e-mail)

Masahiro has completed the code that defines 1-dimensional histograms in the DMT environment and allows passing of histogram structures to the DMT viewer via the MonServer, MonClient and MonDataMsg classes. He is now updating Daniel's ROOT extensions within the DMT viewer itself to provide a histogram display gui.
 
• Operational state conditions - D. Chin, K. Riles (KR reporting)

Prompted by requests from John, Dave has reorganized some of the code to make it more efficient and to speed up compilation, but there is more work to be done on that. As noted above, the functional changes reported at the last detchar telecon will be available in the next DMT release.

• Line noise (multi-taper method) & inter-channel correlation monitors - B. Allen, A. Ottewill

(Adrian reported by telephone afterward)
Nelson Christensen continues to use the correlation monitor for E3/E4 studies. A dramatically revised version of the multi-taper line monitor has been sent to Bernard Whiting for performance testing. The new version is better integrated into the DMT background monitor format and includes both a DMT viewer interface and database trigger generation. Adrian expects to send the new code to John next week for use in E5.
 
• Line noise (quasi-monochromatic method) monitor - E. Daw, S. Klimenko (not present, attending Amaldi meeting)

 
• Band-limited / seismic noise monitors - E. Daw (not present)

 
• Bilinear cross-couplings & broad-band non-Gaussianity monitor - S. Penn (reported by e-mail)

The stand-alone bispectrum program now includes bicoherence which is expected to be more useful than the unnormalized bispectrum of the old version. Steve plans to be at Livingston before and during E5 and will give tutorials on using the program to anyone interested.
 
• Lock transition and servo instability monitors - D. Chin, K. Riles (KR reporting)

Both the lock transition and servo instability monitors now have dmt viewer interfaces that show histories of lock transitions and servo alarm triggers. Dave has given the revised monitors to John for running in E5.
 
• Rayleigh behavior monitor (non-Gaussianity vs frequency) - S. Finn, G. Gonzalez, P. Sutton (not present, attending Amaldi meeting)

 
• Power spectral transient monitor - S. Mohanty (not present, attending Amaldi meeting)

 
• Transient identification & event catalog monitors - J. Sylvestre, R. Weiss (Julien reporting)
  Julien plans to release (today or Monday) new versions of the tid program suite. The suite consists of a DMT background monitor (server) that computes time-frequency plots, an interactive, foreground gui program (client) that can run anywhere and communicates with the background monitor to display the plots in real-time scroll mode, and another DMT background monitor (event catalog) that identifies patterns in the time-frequency plane. The default Nyquist frequency binning can be changed with an option that turns on a decimation filter.
  The time-frequency plotter can keep up in real-time with plotting several 2kHz-rate channels. It's meant for exploratory finding of recurring patterns. With trial and error one can determine pattern templates (rectangular only, for now) and thresholds that can then be inserted into an ascii configuration file that the event catalog reads. At the moment, a config file exists to identify a known transient due to a compressor near the LHO mid-X station, and Julien is working to develop others. For the moment, when a pattern is recognized the event catalog produces ascii and html files. In the future it will also generate a database trigger.
  Documentation, including a detailed example can be found here.
  
  
• Glitch monitor - M. Ito (reported by e-mail)

Some minor improvements are planned for E5: suspending the calculation of ambient standard deviations during detected events and adding more information to the database output. Some sample events found by the glitch monitor during the engineering runs have been posted.
 
• Magnetic field and seismic transient monitors - R. Frey, R. Rahkola (Rauha reporting)

An earthquake monitor that sets visible and audio alarms in the control room is now being tested. The monitor uses its own EPICS interface, different from the default DMT interface for triggers, allowing a dedicated EPICS channel for the monitor. In its first test the monitor picked up seismic triggers during a recent windstorm.

A.O.B.

• Fred Raab reported that after some installation work Hugh Radkins is now working again on tidal modelling. E3 data has been looked at, and E4 will be soon. A preliminary report will be given in two weeks.
  
  
• Next  teleconference (E5 preparations & E3/E4 reports): Friday July 27 at 11:00 a.m. EDT (8:00 PDT).