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ALMA Calibration Group

TIP Last Update: JeffMangum - 17 March 2013
Welcome to the home of the ALMA Calibration Group on the wiki!

Information related to the development of calibration techniques for ALMA are located here.

  • Next meeting:
    • Date: TBD
    • Time: 15:00 UT
    • Duration: 1.0 hr
    • USA Toll Free Number: 877-940-1273
    • International: +1-517-466-6602
    • Passcode: 5 6 6 4 7 9 4
    • Leader: JeffMangum
  • Agenda and Minutes on the CalAgendaMinutes topic.
  • Action Items on the CalActionItems topic.

Table of Contents:


 
Specification Requirement
Pointing (All-Sky)
2.0 arcsec
Pointing (Offset)
0.6 arcsec
Primary Beam
6% in power out to 10% on the primary beam
Feed Setting
280 micron vertical; 3200 micron lateral
Subreflector Setting
28 micron vertical; 140 micron lateral; 1.7 arcmin rotational
Antenna Motion
1.5 degrees in 1.5 seconds settling to 3 arcseconds peak pointing error
Amplitude (Relative)
1% for nu < 370 GHz; 3% for nu >= 370 GHz
Amplitude (Absolute)
5% for all frequencies
Antenna Location
65 micron
Geometric Delay
5 fs systematic
Atmospheric Delay
10 fs systematic; 40(1.25 + PWV) fs fluctuating
Antenna Delay
7 fs systematic; 50 fs fluctuating
Electronic Delay
7 fs systematic; 30 fs fluctuating
Bandpass
10000:1
Polarization
1% in amplitude; 6 degrees in position angle
Sideband Gain Ratio
0.1%

Calibration Group Action Items

See the CalActionItems topic for a complete list of open and closed action items.

Calibration Categories

Calibration Issues

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Topic revision: r110 - 2013-05-21, JeffMangum
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