[daip] [!3897]: aips - Combining AIPS SN/CL tables

[Eric Greisen]

Eric Greisen updated #3897
--------------------------

              Status: Closed (was: Response Overdue)
                 Due: - Cleared - (was: 29 October 2013 02:47 PM)

Combining AIPS SN/CL tables
---------------------------

           Ticket ID: 3897
                 URL: https://help.nrao.edu/staff/index.php?/Tickets/Ticket/View/3897
           Full Name: Ylva Pihlstrom
               Email: ylva at unm.edu
             Creator: User
          Department: AIPS Data Processing
       Staff (Owner): Eric Greisen
                Type: Issue
              Status: Closed
            Priority: Default
      Template Group: Default
             Created: 23 September 2013 06:57 PM
             Updated: 31 October 2013 04:37 PM



I'm sorry to be so tardy in replying - I have no great ideas.

CALIB needs to have solutions for all IFs.  But then you could use CLCOP
to take the solution from IF N and apply it to IFs 1-N-1,, and N+1 - M in one
execution of CLCOP.  (OPTYPE='AVER').  If necessary to take R polarization
and apply to L or vice versa, one more execution of CLCOP with 'R2L' or 'L2R'
and INVERS=0.  After you fix up the SN then run CLCAL.

SNP2D is what is really intended to handle your problem.  If the phase at the
maser line is due to a delay - and many experienced folks here believe that
all phases are really delays - then the correct phase to apply at other widely
separated frequencies (EVLA) would be via delays (phase changes with
frequency linearly) rather than simply copying phases.

Eric Greisen




------------------------------------------------------
Staff CP:  https://help.nrao.edu/staff