[daip] [!5390]: aips - POSSM auto- and cross-correlation functions

[Lynn D Matthews]

Lynn D Matthews updated #5390
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POSSM auto- and cross-correlation functions
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           Ticket ID: 5390
                 URL: https://help.nrao.edu/staff/index.php?/Tickets/Ticket/View/5390
           Full Name: Lynn D Matthews
               Email: lmatthew at haystack.mit.edu
             Creator: User
          Department: AIPS Data Processing
       Staff (Owner): -- Unassigned --
                Type: Issue
              Status: Open
            Priority: Default
                 SLA: NRAO E2E
      Template Group: Default
             Created: 22 August 2014 06:47 PM
             Updated: 22 August 2014 06:47 PM
                 Due: 26 August 2014 06:47 PM (4d 0h 0m)
      Resolution Due: 01 September 2014 06:47 PM (10d 0h 0m)



I have tried using POSSM with APARM(8)=3 and 4, respectively, to plot auto- and cross-correlation functions.

I find that if one plots more than one Stokes, all but the first appear corrupted. For example, if Stokes='half', all Stokes LL plots are identically zero. If Stokes=' ', then LL is non-zero but clearly wrong, and RL and LR are zero.

Things look seemingly okay if one plots one Stokes at a time. 

I've tested various data sets, including some old VLA data, and always see the same behavior. 

Lynn Matthews

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