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Knowledgebase: ALMA Observing Tool (OT)
My project requires good uv-coverage. How should I set up my Science Goal?
Posted by Suzanna Randall, Last modified by Rein Warmels on 28 February 2018 07:31 AM

uv-coverage is not expected to be a significant issue. Even snapshot observations will have sufficient uv-coverage for the vast majority of projects. You can verify this using the SIMdata task in CASA or the ALMA Observation Support Tool, available from the Science Portal under 'Documents & Tools'. The online Observation Support Tool (OST) can also be accessed directly at http://almaost.jb.man.ac.uk/. SIMdata documentation can be accessed directly at http://casaguides.nrao.edu/index.php?title=Simulating_Observations_in_CASA

In the unlikely event that you do find you need more time than estimated by the ALMA OT in order to fulfil uv-coverage requirements, you should select "Override OT's sensitivity-based time estimate" in the Control & Performance editor of the OT, and provide a careful justification in the Technical Justification. This may be beneficial for observations of very complicated and bright sources, where the OT estimated time is too short to fully recover the structure. The time entered should include all calibrations and overheads and is assumed to pertain to the 12-m array configuration only. Multiple 12-m arrays are not allowed in time override mode.

The time required for the ACA will then be estimated by the OT as explained in this Knowledgebase article.

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