Report for ALMA Calibration and Imaging
                         October 2002
                       NA Progress Report   

Overview
     
     During October, Science IPT activity again centered on final definition 
of the ALMA Configuration, particularly the long baseline part of the plan,
and on the Site Infrastructure Review and Transporter Review held in Tucson.
A calibration telecon was held to discuss progress on the memo review process
and discuss other issues.

Several Science IPT staff telecons were held, a Science IPT leaders telecon
was initiated, and a joint NA/EU Science IPT telecon was initiated.
Most of the NA Science IPT: Holdaway, Radford, Mangum and Butler, 
along with Conway from the EU Science IPT, met in Tucson for a face-to-face 
meeting to refine Level 3 milestones for the IPT attended by Project Scientist
Stephane Guilloteau and Japanese Project Scientist Tetsuo Hasegawa.
Wootten and van Dishoeck also attended the ASAC telecon, and commented upon
the ASAC report to the ACC.

Anticipated problems:

With a workshop on receiver specifications occurring during late
November, the Science IPT will be preparing to defend specifications
it has contributed, particularly that on receiver stability.

Configuration

During this period, the JAO approved the plan delivered by Conway for
configurations covering less than 4km in extent to the JAO.  Holdaway 
continued designing the interface from the largest Conway
array to the more extended Y+ configurations.  A new detailed map of the
site, accurate to a few meters, was delivered and Conway began taking into
account new details of the terrain to mate the array configuration to it.

Status of Y+ Configuration

Holdaway is finishing the first draft of this configuration, due 5 November.
The new more accurate maps of the site will allow better assessment of the
chosen pad positions, which will follow the first configuration attempt.

Calibration

Butler, as leader of the Calibration Group, organized and moderated 
a ALMA Calibration Group phone 
telecon.  Reviews of Memos were discussed; minutes of the meeting
are available.  Several memos will be revised.  In particular,
Mangum revised ALMA Memo 434 on "Load Calibration at Millimeter and
Submillimeter Wavelengths" in light of the reviewers comments.

Site Characterization

A new map of the site, much more accurate than those previously
available, was delivered.
Butler and Holdaway held discussions on
site data analysis particularly on water vapor scale
height and on the hygrometer data.

Science Software Requirements

       Myers continued to work with the Science Software Requirements 
group on audit requirements for aips++.  Mangum also works with this group,
as well as project scientists.
     
Outreach and Public Education

Wootten visited with scientists at the Arizona Radio Observatories during
his visit to Tucson.

Science IPT ALMA Papers
Revised ALMA Memo 434 on "Load Calibration at Millimeter and
      Submillimeter Wavelengths"

Science IPT Meetings during September
 1 October 2002 News--2GC Comments, IPT; Configuration and JAO-only Configuration Review, Director's Frontend Review; Calibration: Milestones v2., Telecon and Photonic Cal Device.
 8 October 2002 News--Director's FE Review, Science IPT; Configuration and JAO-only Configuration Review, Calibration: Milestones v3., Telecon and Photonic Cal Device.
 15 October 2002 News-- Configuration and JAO-only Configuration Review, Calibration: Milestones v4., Calibration Telecon
 29 October 2002 News-- Configuration Approved, Site Infrastructure and Transporter Review, Milestones v4.

ASAC Telecon 9 October 2002 (ASAC Report to ACC to be available soon)

NACC and ACC Meetings 29-30 October 2002.