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ALMA Calibration Group
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:
Calibration Group Action Items
Calibration Links
Calibration Categories
Calibration Issues
Calibration Specifications and Requirements
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 Links
Recent Calibration Documents
:
Listing of Recent CSV Calibration Documents
ALMA Project Documentation
:
Links to Project-level documentation which relate to ALMA calibration
ALMA Calibration Memos
:
Links to calibration memos
Calibration Group Meeting Agendas and Minutes
:
Agendas and Minutes for all ALMA Calibration Group meetings
Calibration Memo Reviews
Calibration Group Use of the Wiki
Atmospheric Modelling for ALMA
Calibration Categories
CalAmp
:
Amplitude
CalPhase
:
Phase
CalBandpass
:
Bandpass
CalPol
:
Polarization
CalPoint
:
Pointing
CalLoc
:
Antenna Location
CalDelay
:
Antenna and Electronic Delay
CalOpt
:
Optics
CalTotalPower
:
Total Power
CalPrimaryBeam
:
Primary Beam
CalArchive
:
Archiving and Accessing Calibration Quantities
CalSolar
:
Solar Observations
Calibration Issues
CalAmpSources
:
Absolute Amplitude (Flux) Calibration Source Discussion
CalPlan
:
Calibration Plan Revisions
CalBackend
:
ALMA Backend Design
CalAca
:
The ACA
CalBaseline
:
Baseline Determination
CalAsac
:
Issues Raised by the ASAC
CalDrsp
:
Calibration Attributes of DRSP (Hogerheijde Report)
CalAncillary
:
Ancilliary Calibration (Weather) Devices
CalExamples
:
Calibration Examples
CalSubref
:
Calibration Issues Related to Subreflector Positioning
Calibrator Database Development
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Topic revision: r110 - 2013-05-21,
JeffMangum
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