[daip] [!7724]: AIPS - AIPS UVPLT option rotated uvdist is weird

[Eric Greisen]

Eric Greisen updated #7724
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       Staff (Owner): Eric Greisen (was: -- Unassigned --)
              Status: Closed (was: Open)
                 Due: - Cleared - (was: 15 December 2015 10:24 AM)

AIPS UVPLT option rotated uvdist is weird
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           Ticket ID: 7724
                 URL: https://help.nrao.edu/staff/index.php?/Tickets/Ticket/View/7724
           Full Name: Eskil Varenius
               Email: varenius at chalmers.se
             Creator: User
          Department: AIPS Data Reduction
       Staff (Owner): Eric Greisen
                Type: Issue
              Status: Closed
            Priority: Default
      Template Group: Default
             Created: 11 December 2015 10:24 AM
             Updated: 11 December 2015 05:43 PM



The option is to make the axis the projected baseline length
along a user-specified position angle.   ROTATE=0 would be
the V axis, 90 degrees would be the U axis.  When you plot 
the U-V sampling you see that sometimes U is 0, sometimes
V is zero even though U*U + V*V is large.  The same happens
on any other position angle.  Some baselines are at right
angles to that position angle and so have only small values
on the requested axis.

Eric Greisen




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