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NRAO Knowledgebase


CASA data repositories contain our current best knowledge of, e.g., observatory coordinates, leap seconds, ephemerides, calibrator models, etc. Every version of CASA contains the latest files. Sometimes, however, one may want to manually update the...
When using the VLA for subarray observations, currently, the OPT does not have a special setup in place. Please see the _Subarray Observing_ section within the _Guide to Observing with the VLA_. https://science.nrao.edu/facilities/vla/docs/manuals/o...
You can link your NRAO and ALMA users accounts. This means you are then allowed you to navigate between help desk systems with one click and activate advanced features available in both help desks. If you click the link to the left 'ADD ACCOUNT LINKA...
The ALMA/NAASC helpdesk can be accessed through the ALMA Science Portal [1], or by navigating to help.almascience.org [2]. Links: ------ [1] http://www.almascience.org/ [2] http://help.almascience.org/
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ALMA Knowledgebase
General ALMA Queries(39)
Can I submit a ticket in Japanese?
How close can ALMA observe to the Sun?
Cycle 4(5)
What Cycle 4 proposal issues and clarifications should I be aware of before submitting my proposal?
What is the difference between a standard and a non-standard observing mode for Cycle 4?
Cycle 5(3)
What Cycle 5 proposal issues and clarifications should I be aware of before submitting my proposal?
What is the difference between a standard and a non-standard observing mode for Cycle 5?
Resources & Observer Support(14)
How do I arrange a visit to one of the ARCs?
Where can I find ALMA documentation and manuals?
Project Planning(37)
How do I deal with targets with unspecified coordinates in the OT?
Where can I find the online ALMA observing simulator developed by the University of Manchester?
ALMA Observing Tool (OT)(47)
What do I do if I can't get the OT to work?
How do I deal with targets with unspecified coordinates in the OT?
Proposal Handling(6)
May I submit an identical proposal to more than one category, e.g. submitting a proposal on distant galaxies both to cosmology and to galaxy categories?
To which category should I submit a proposal on distant galaxies: "cosmology/high-z" or "Galaxies/Nuclei"?
Archive & Data Retrieval(26)
What observations will be taken in Science Verification, and when will the data become available?
How can I improve the speed of my data download from the archive?
Offline Data Reduction and/or CASA(38)
Where can I find data reduction tutorials and recipes using CASA?
Can I reduce ALMA data in software packages other than CASA, and is there support for that?


What Cycle 5 proposal issues and clarifications should I be aware of before subm...
This Knowledgebase article is a repository for information relevant to submission of Cycle 5 proposals. These items may affect how users write their proposals or set up their observations in the OT. The content may evolve rapidly as the 20 April, 2017 ...
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  1. How do I model the ALMA primary beam, and how can I use that model to obtain the...
  2. How do I convert flux measurements given in Jy km/s or K km/s into the peak flux...
  3. What are the frequency reference frames in CASA?
  4. What do I do if I can't get the OT to work?
  5. How can I estimate the Peak Flux Density per synthesised beam using flux measure...
  6. How do I arrange a visit to one of the ARCs?
  7. Will re-reduction improve the Cycle 0 data products provided by the archive?
  8. Where can I find ALMA documentation and manuals?
Recent Articles 
 
  1. How is noise correlated in CASA when mstransform and tclean are used?
  2. Are there antenna position problems in data taken between 25th December 2016 and...
  3. Is it possible to resume interrupted downloads?
  4. Can I search for a list of sources at the same time?
  5. Can I see which data are public but have not yet been published?
  6. How do I make a polarization observation in Cycle 5?
  7. Under what conditions can I request the raw data of my observing program be deli...
  8. What is the difference between a standard and a non-standard observing mode for ...
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