[daip] [!13077]: AIPS - How to add random noise to the model data

[JongHo Park]

JongHo Park updated #13077
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How to add random noise to the model data
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           Ticket ID: 13077
                 URL: https://help.nrao.edu/staff/index.php?/Tickets/Ticket/View/13077
                Name: JongHo Park
       Email address: jhpark at astro.snu.ac.kr
             Creator: User
          Department: AIPS Data Reduction
       Staff (Owner): -- Unassigned --
                Type: Issue
              Status: Open
            Priority: Default
                 SLA: NRAO E2E
      Template group: Default
             Created: 29 November 2018 02:11 AM
             Updated: 29 November 2018 02:11 AM
           Reply due: 03 December 2018 02:11 AM (4d 0h 0m)
      Resolution due: 25 August 2021 12:00 AM (999d 21h 49m)

Hello! I am a Ph.D. student at Seoul National University in South Korea.I am trying to do some simulations about how much the observed linear polarization is reliable.My idea is to make simulated data by1. converting the CLEAN model to the UV data with the task UVSUB in AIPS2. adding random noise to the created data3. adding D-term errors to the created dataI succeded in the step #1 and I think that the step #3 can be done with the SPLIT and DOPOL = 1 with some artificial D-term values added to the AN table.However, I could not figure out how to add random noise to the data.The created data in the step #1 has zero noise because the data are created from a model.I want to add similar levels of random noise I could find in the real data, say, rms noise of 0.1 mJy/beam.I found that the task UVMOD allows me to add the random noise but I want to know how I can add the random noise of rms = 0.1 mJy/beam.I would be really flattered if you could let me know the procedure.Thank you so much for your help in advance!Best Regards,Jongho Park

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