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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...
It is now possible to apply TEC (Total Electron Content) corrections within CASA. Note that the following procedure currently only corrects for Faraday rotations, and no corrections will be applied to dispersive delays as is possible with the AIPS TECO...
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/obsg...
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
Cycle 6(2)
What Cycle 6 proposal issues and clarifications should I be aware of before submitting my proposal?
Why are the fluxes in my CASA 5.1 simulated mosaic image incorrect, and how can I fix it?
Cycle 5(1)
What Cycle 5 proposal issues and clarifications should I be aware of before submitting my proposal?
General ALMA Queries(41)
Can ALMA data be used for studying Earth's atmospheric effects?
Can I respond to my helpdesk ticket through my email?
Project Planning(30)
Are there policies specific to Large Programs?
Can I observe continuum emission using ACA?
Proposal Handling(7)
I've downloaded the ALMA Proposal Template (LaTeX format). How do I convert it to letter size?
May I make changes to my project after the proposal review process?
ALMA Observing Tool (OT)(50)
Can I load a proposal from a previous cycle into the OT and submit it as a new proposal?
Can I request monitoring observations with standalone ACA?
Archive & Data Retrieval(27)
How can I access ALMA calibrator data?
As PI of an ALMA proposal, how can I give others access to the data during the proprietary period?
Offline Data Reduction and/or CASA(41)
Are there significant differences between versions of CASA after CASA 3.3 that make them incompatible?
Can I analyze single dish data using CASA?
Resources & Observer Support(14)
How can I get a full list of everything ALMA has observed?
How can I receive email notification of activity on my ALMA proposals?


What Cycle 6 proposal issues and clarifications should I be aware...
This Knowledgebase article is a repository for information relevant to submission of Cycle 6 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 19 April, 2018 p...
Why are the fluxes in my CASA 5.1 simulated mosaic image incorrec...
We have recently identified a bug in the CASA 5.1 releases which SERIOUSLY AFFECTS MOSAIC IMAGING OF SIMULATED DATA.   The simulated visibilities themselves are not adversely affected, nor is imaging a single field of a simulated mosaic in non-mosaic mode...
Most popular articles 
 
  1. How do I model the ALMA primary beam, and how can I use that mode...
  2. How do I convert flux measurements given in Jy km/s or K km/s int...
  3. What are the frequency reference frames in CASA?
  4. How can I estimate the Peak Flux Density per synthesised beam usi...
  5. What do I do if I can't get the OT to work?
  6. Will re-reduction improve the Cycle 0 data products provided by t...
  7. How do I arrange a visit to one of the ARCs?
  8. Where can I find ALMA documentation and manuals?
  9. Can I reduce ALMA data in software packages other than CASA, and ...
Newest articles 
 
  1. Why wont the OT start?
  2. Why are the fluxes in my CASA 5.1 simulated mosaic image incorrec...
  3. Why are the beam size value(s) in the Phase II OT different from ...
  4. Why won't the "Target List" upload feature work in the NA ALMA ar...
  5. Why won't the OT work with Java 9?
  6. What CASA version was used for QA2?
  7. Are there policies specific to Large Programs?
  8. What Cycle 6 proposal issues and clarifications should I be aware...
  9. Why does scriptForPI.py crash with NameError: name 'hif_restoreda...