[daip] [!7748]: AIPS - Wrong definition of position angle in IRING

[Eric Greisen]

Eric Greisen updated #7748
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       Staff (Owner): Eric Greisen (was: -- Unassigned --)
                 Due: - Cleared - (was: 23 December 2015 12:00 AM)

Wrong definition of position angle in IRING
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           Ticket ID: 7748
                 URL: https://help.nrao.edu/staff/index.php?/Tickets/Ticket/View/7748
           Full Name: Luis Rodriguez
               Email: l.rodriguez at crya.unam.mx
             Creator: User
          Department: AIPS Data Reduction
       Staff (Owner): Eric Greisen
                Type: Issue
              Status: Open
            Priority: Default
                 SLA: NRAO E2E
      Template Group: Default
             Created: 19 December 2015 09:15 PM
             Updated: 22 December 2015 08:29 PM
      Resolution Due: 30 December 2015 12:00 AM (7d 3h 30m)



I have looked hard at the geometry in IRING because it
is somewhat confusing.  But in the end I think it is doing
the right thing except that every radius has been increased
by dividing by the cos(inclination).  I think that is wrong but
the rest appears to be okay.

Can you send me the IMHEADER output for your image
or better yet a FITS file of the image?  And then tell me
what makes you think that it is doing things wrong.  I was
thinking of trying this on my galaxy HI image but I am not
sure what to expect of it.

Eric Greisen





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