[mmaimcal] Calibration and Imaging Division Monthly Report for April 2000.

[Al Wootten]

Folks--Anything left out of importance?  - Al

Calibration and Imaging Division Monthly Report for April 2000.

During April 2000, Mangum worked on
developing a system of calibration accurate to 1%, in accord with the
ASAC request--he found the BIMA design capable of compliance.  He also
worked on the Prototype Interferometer Test Plan.  Radford continued
design of the nutator, including modifications to accept the BIMA calibration
scheme.  Several instruments at the site have still not recovered from the
Bolivian Winter storms; their recovery is underway.  The tipping radiometers 
are working again, but the
interferometers and 183 GHZ radiometers are still broken. Butler finished the
Mark II mask of the site, with improved mountain shadowing, road positions,
and gradients.  Yun finished the image library for simulations, and began
adjusting the concentric ring array designs to the new site mask.  He also
organized the configuration meeting, to discuss the image library and
the simulations, and wrote the configuration chapter in the Project Book.  
Wootten arranged the ASAC meeting, which endorsed the scope
of the construction project, and disseminated the ASAC Report to ALMA Division
Heads and others.  The construction budget was secured, and Project Book
Chapters written and incoporated into the new document.  Mangum and Wootten
participated in the review of the Science Software Requirements report,
ALMA Memo No. 293.