[alma_na] May 13 ALMA NA DH Meeting Minutes

[Carolyn White]

ALMA NA DH Meeting - 2002-May-13

Attendees - Glendenning, Gray, Kingsley, Mangum, Payne, Perfetto, Rafal,
Simon, Sramek, Webber, White, Wootten

Wootten gave a report on the Calibration Meeting.  A calibration group was
formed.  The group worked through the Project Book and plan to have an
updated version in two weeks.  The group appointed Brian Butler as head of
the calibration effort and his first item will be to review the Project
Book.

Guilloteau noticed an error in the Vertex specification for dual load (memo
will be revised).  There are issues with both the subreflector calibration
and dual load semitransparent vane system; testing needs to be done.

There has been progress on two designs in the water vapor radiometer area;
testing is being conducted at OVRO, VLA and BIMA. A WVR sub-group of the
calibration group was created.  Holdaway is working on the total power
issues and preparing a memo.

Webber questioned the WVR group if there are optical coupling issues and if
the LO leakage from WVR goes into the front end?  The front end WVR groups
need to coordinate these issues as well as several other items.  At the
calibration meeting the group also discussed the photonic calibration
system.

Rafal suggested that we may want to have a document that explains how each
specification will be verified.

Kingsley reported that Vertex is on site.  Shipments will start arriving
this week and erection starts on the 20th-27th.  The transporter meeting
last week was very productive; we are working on the tilt specification
issues.  Fast switching may also be a problem; the compressor/front end
group will work through this.  The antenna group is working to finalize
their product tree for system engineering.  Guilloteau may be claiming
problems with dual load at his facility.

Sramek is continuing to document the back end PDR that took place in
Granada.  Sramek is compiling a list of issues to be sent to the back end
staff.  Most of the meeting viewgraphs are available on SiteScape.  The back
end plan is being re-vamped.

Glendenning stated that preparations for the antenna involves several areas:
(1) site infrastructure; (2) programming activities; (3) setting up
computers for site (monitors, database, etc.); (4) working on documentation
and plans for phase 2.  The next version of TICS will be in August 2002.

Perfetto gave the status of the holograph, which is being tested to make
electronic sequences work well.  The reference and transmitter seeds are
being tested:  1) the latest data looks alight; Brooks is working on
receiver data.  The control software for the holography is progressing.  The
evaluation receiver is making progress as well.  The first cooled down unit
is expected next week.  The assembly of the 2nd receiver is practically in
the same phase as evaluation receiver #1.  Compressor #2 is complete and
being tested in the lab; compressor rotates only in aziumth.

Payne described the activities in phontoics.  Shillue is on-track with this.
Simond has accepted the position and starts June 3.  Ellison completed first
test on photodiodes.

Webber reported that the custom correlator is due in 10 days; we expect to
have preliminary results in two to three weeks.

Gray reported on the progress being made with SiteScape.  Oliver will be
sending out an announcement soon.  The initial release is for users to be
accustomed to the program and send in comments/suggestions.  We ask that
users do not link URL's yet.

Rafal reports that at the ACC teleconference on May 21 we expect the current
version of the Project Plan to be released.  Rafal is working on attendance
requirements for the AMAC meeting.  Rafal is still working with fiscal on
the financial reporting the DH require.

The next meeting will be Monday, June 3.