[daip] DFTPL only averages IF 1

[Eric Greisen]

Michael Rupen writes:
 > Dear DAIP,
 >   DFTPL seems to average only the first IF (for VLA data anyhow): at least
 > I got identical answers for DFTPL run on (1) a standard VLA continuum
 > data set with 2 IF pairs, and (2) the same data set, after UVCOPing just the 
 > 1st IF.  DFTPL did give a different answer for the UVCOP of just the 2nd IF,
 > so there is a way around this, but it's kind of annoying.  So, suggestions
 > in order of ease & utility:
 > 
 > 1- Fix the documentation to say PROMINENTLY that this task looks only at the
 >   first IF
 > 
 > 2- Fix the task to average over all IFs by default
 > 
 > 3- Add BIF/EIF to allow the user to select which IFs to average
 > 
 > The latter would be very useful; UVCOP is not a big deal, but it adds
 > another step which doesn't seem very necessary.

10710.  December 8, 2000            DFTPL                 Eric
        Added BCHAN, ECHAN, BIF, EIF, FREQID to the inputs and fixed
        the task to loop over them and use correct frequencies to
        scale any position shifting.  Corrected uninitialized
        variables that led to NaNs for some reason I do not
        understand.  It suggests that dynamic variables are still used
        sometimes.  Found that it did not include samples in the
        max/min that it should reject (self-scale but fixed range) but
        it did try to plot them.  Fixed it to handle compressed data.
        Moved nowhere.


Eric