; DOIFS
;---------------------------------------------------------------
;! controls functions done across IFs
;# ADVERB UV
;-----------------------------------------------------------------------
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;-----------------------------------------------------------------------
;---------------------------------------------------------------
DOIFS     LLLLLLLLLLLLUUUUUUUUUUUU CCCCCCCCCCCCCCCCCCCCCCCCCCCCC
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DOIFS
Type:  Adverb     (Logical,  > 0  =>  true)
Use:   Controls functions done across IF numbers
Null value:  false (-1).
Tasks:
  FLAGR......Edit data based on internal RMS, amplitudes, weights.
             DOIFS > 0 => flag all IFs if one is bad.
  KRING......Fringe fit data to determine antenna calibration, delay,
             rate.  DOIFS controls how IFs are combined in the
             solutions.
  RLDLY......Fringe fit data to determine antenna R-L delay difference.
             DOIFS   DOIFS controls how IFs are combined in the
             solutions.
  SNFLG......Flags uv data based on jumps in an SN or CL table.
             DOIFS true means to flag all IFs when one is bad.
  VPFLG......Resets flagging to all or all corss-hand whenever some are
             flagged.  DOIFS controls how much is flagged when some
             part is flagged.
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