[daip] [!15876]: AIPS - How to change antenna weight with the AIPS task "WTMOD" ?

[Eric Greisen]

Eric Greisen updated #15876
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How to change antenna weight with the AIPS task "WTMOD" ?
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           Ticket ID: 15876
                 URL: https://help.nrao.edu/staff/index.php?/Tickets/Ticket/View/15876
                Name: Cheng-Yu Kuo
       Email address: cykuo at mail.nsysu.edu.tw
             Creator: User
          Department: AIPS Data Reduction
       Staff (Owner): Amy Mioduszewski
                Type: Issue
              Status: Open
            Priority: Default
                 SLA: NRAO E2E
      Template group: Default
             Created: 19 March 2020 05:34 AM
             Updated: 19 March 2020 10:22 AM
           Reply due: 23 March 2020 08:37 AM (3d 22h 14m)
      Resolution due: 13 December 2022 05:00 PM (999d 6h 37m)

Do not run the task in place - make a copy of the input with new weights.
Run PRTUV or UVPRT to see the weights that are produced.  I think English is causing a problem.  You
almost certainly want the ALMA baselines weighted higher not lower than the other baselines.  The remark about downweighting the best antennas was made for data that had weights already set by the expected noise.  In other words data that already had ALMA weighted 100 times more than the others.  If all weights in your data are the same then you need to raise the weight of the ALMA baselines.

Eric Greisen


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