MMA Imaging and Calibration Group

Date: 28 October 2003

Time: 4:00 pm EDT (2:00 pm Socorro, 2:00 pm Tucson)

Phone: (434)296-7082 (CV SoundStation Premier Conference phone 3rd floor).  No Video planned...

Past minutes, etc on MMA Imaging and Calibration Division Page
 
 

Agenda

Notes from the meeting are in this font!
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Science IPT Items - Wootten

ALMA Calendar

• 3-4 November ALMA Board,  Santiago
• 5 November Visit to future Array Operations Site
  
• 6 November    ALMA Groundbreaking, future Operations Support Facility site
• 14-15 November SSR Face-to-face, AOC
  

LAMA Memo Series

•  Report of the Science IPT, Q3 2003.
  

- Action items from varioussources:
 Last Meeting:  SSB Requirements should be put into Science Requirements.
                       Comments due on ACA 
                       Distribute username and password for the DRSP website.
Mini-ALMA Week Action Items and Decisions: Science IPT: Complete comments on Antenna Technical specs and corresponding ICDs. All IPTs 15-10-03                                                      See Over-the-top recommendations.    Document to implement five load amplitude calibration device described in ALMA Memo #461 must be written SCIE, FEND 26-9-03      See proposed Amplitude Calibration Measurements and CRE.

                        Highlight remaining controversial issues in FE Req documents submitted to CCB. All IPTs 30-9-03  HAW commented.
                        Science Requirement document should be ready to be submitted to the CCB. Wootten 20-10-03  Last moment for comments!
                        All IPT leaders or designees to provide to Emerson description of system operational needs by 10 October 2003. Science IPT Report. Summary.
Correlator CDR:  "The committee recommends that the Science IPT clarify the conditions under which the spectral dynamic range of 40 dB be required.  Since the ALMA correlator is a 2-bit correaltor, the dynamic range can only be achieved if the narrowband power into the receiver is less than a certain small fraction of the total receiver power.  The Science IPT must quantify what the maximum total narrowband power is into the receivers, as fraction of the total receiver noise power."    

                        "The science specifications indicating what the maximum sensitivity loss of the correlator must be should be further clarified.  Nominally, with the European tunable filter card and a 2-bit correlator, the sensitivity loss in the correlator is 1-(0.88 x 0.985)=.133."   
                        Some simulations may be needed to determine imaging artifacts possibly caused by phase and amplitude errors in overlap region of
                                     tunable filter option for correlator.
AMAC: Simulate imaging using two prototype antennas as examples, if array were to consist of half of one type and half of the other.

Discussion Items - (Wootten)

• ALMA Science Requirements Document -- update of Project Book Chapter 2 (Al)
• New Imaging Appendix from Gueth
• Other changes--electronics losses; correlator setup time
  
• ALMA System Design Document -- D'Addario's proposed phase changes  (Holdaway)
  
• Configuration (Wootten)
  

• Order of construction--inner pads last.
  

• ATF (Mangum) 
  
• Site characterization (Radford)
  
• Public Relations.  New IPT has been formed.
  

 October 13-14, 2003 : The Search for Other Worlds
 

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Travel

 Oh, always

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