Caltech: Drever, Lazzarini, Shawhan, Zweizig
     Carleton: Christensen
     Florida: Coldwell, Klimenko
     LHO: Ito, Savage, Sigg
     LLO: Chickarmane, Coles, Zotov
     Michigan: Riles
     Penn. State: Schlaufman, Sutton
     Syracuse: Penn, Saulson

S1 Preparation:

• Interferometer status (R. Savage, M. Coles)

Both Hanford IFO's are locking well now (6-8 hour locks are not unusual). Work is underway to restore H2 sensitivity to its state just before the infamous wire break. Daniel Sigg and Mike Zucker are working on getting the new common mode laser feedback working for H1, which could bring its noise level down to where H2 was during the E7 run. A hardware freeze is imminent, but there is an apparent beam-clipping problem on the H2 input beam, not a show stopper, but undesirable.
The work at LLO has been focussed for the last three weeks on the PEPI installation for the input test masses. The installation went very well. Rewiring and software work are in progress and going well. Joe Giaime is overseeing the commissioning work. The interferometer itself runs well at night. Except for occasional stormy periods in the Gulf of Mexico when the microseismic level builds up, the overall duty cycle of the IFO is about 30% without the new PEPI actuation turned on. LLO plans to run every night next week to shake down operations, since many people will be away at the LSC meeting the following week.
• Meetings (All)

It was decided to plan a single pre-S1 inter-site telecon on Thursday March 22 at 8:00 a.m. PDT to review hardware and software status. Other meetings can be held as needed, if problems crop up.
 
• Scientific monitoring shifts (KR)

The latest schedule  still has some open slots, most notably some expert day shifts at LLO. The critical evening and owl shifts do have expert coverage. A tentative set of scimon procedures has been posted. Experts are urged to look them over and revise them as needed.
 
• Scientific investigations (KR)

A list of S1 investigations and team members has been posted. More volunteers are welcome. Persons manning scimon shifts are encouraged to sign up for an investigation.

• KR  has posted a tentative detchar sessions schedule for the August LSC meeting at Hanford. Overlap with advanced detector and ASIS sessions has been avoided. Sessions will be held late Monday afternoon and on Wednesday.

Scheduling detector characterization teleconferences for fall 2002

• KR's teaching schedule for fall 2002 interferes with the long-standing detchar telecon time of 11:00 a.m. ET. Moving the starting time to 11:30 a.m. was proposed, but KR will first poll the working group by e-mail and talk with David Shoemaker about conflicts with other Friday LIGO telecons.

DMT  Software Status Review:

 
• DMT infrastructure - J. Zweizig

John has tagged DMT version 2.2.3 which includes some upgrades from Daniel and Masahiro Ito for signal processing routines. The upgrades include filter design code that allows computation of coefficients for elliptic, Butterworth, etc filters to satisfy a requested parameter list. A GUI tool is also being written to allow easy setting of coefficients and determination of filter parameters from already-produced coefficient files. The new code will allow emulation of filters that exist in the online controls and DAQ software. There will be another DMT release on Friday August 16 to test the latest code, with a "final" S1 release with bug fixes just before S1 begins.
 

Updates from DMT monitor authors (progress since Monday meeting and prospects for S1):

• Dave Chin: LockLoss and ServoMon

No updates, but an instability problem in LockLoss has been reported by LHO operators. Dave is trying to track the intermittent problem down..
.
• Ed Daw: blrms and PeakMon (no update)

 
• Masahiro Ito: glitchMon

GlitchMon now uses the new filter classes (see above).

• Sergey Klimenko: LineMonitor and WaveMon

Alarm capability has been added to LineMonitor, but Sergey was unable to confirm from the alarm summary page that they were being set. He will talk to John and/or Szabi to sort this out. He plans to set alarm thresholds on violin modes and harmonics for S1.
WaveMon is working fine, but Sergey hasn't finished the documentation.
 
• Szabi Marka: IRIG-B and TimeMon (update by e-mail)

Documentation for IRIG-B is now available.

• Adrian Ottewill: MTLineMon and CorrMon (no update)

 
• Steve Penn: BicoMon

There have been some small changes to the new GUI control for setting time/frequency parameters and to the display format. Some bug fixes remain, which should be taken care of by S1.

• Rauha Rahkola:  absGlitch and eqMon

Minor change in config file units for absGlitch. Working on new implementation of both monitors using a new, generic chInterface class to be described at the upcoming LSC meeting.
 
• Daniel Sigg: MultiVolt (no update)

 
• Patrick Sutton: SenseMonitor and RayleighMonitor

RayleighMonitor's fast version is now stable. The fast version does not permit changes to control parameters after display begins, but can keep up comfortably in real time.
The DMT viewer time interval for SenseMonitor display has now been fixed to run no longer than 24 hours. Its results for E7 are being compared to what Duncan Brown in the inspiral group has found offline. The agreement is good for H1 and L1, but there is a not-yet-understood discrepancy for H2. Patrick estimates a slightly worse sensitivity. He suspects noise leakage from lower frequencies is affecting his estimates.
 
• Natalia Zotov: PTMon

Natalia has decided to write her own filters for PTMon, which has meant  some rewriting of existing code. She has run into some I/O problems in using some adapted USGS C code in the DMT C++ environment.
• John Zweizig: BitTest, HistCompr, PSLMon, and SegGener

Some documentation has been updated.

• Next  meeting: Monday August 19 at Hanford