; RASHIFT
;---------------------------------------------------------------
;! Shift in RA
;# ADVERB COORDINATES
;-----------------------------------------------------------------------
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;-----------------------------------------------------------------------
RASHIFT   LLLLLLLLLLLLUUUUUUUUUUUU CCCCCCCCCCCCCCCCCCCCCCCCCCCCC
----------------------------------------------------------------
RASHIFT
Type:  Adverb (Real array, 64 elements)
Use:   Specifies a change or shift of the Right Ascension (or X)
       coordinate of an image, one per FIELD.  Specifies a shift
       Eastward (smaller X-pixel value) of the map center.
       The actual new center Right Ascension is given by
              RA = RA_0 + RASHIFT(i) / cos (Dec_0)
       where Dec_0 is the declination of the reference point.

       If more than 64 fields are needed use BOXFILE to specify the
       shifts or field centers.

Null Value:  NONE  ( 0 => no shift )
----------------------------------------------------------------