AIPS NRAO AIPS HELP file for RASHIFT in 31DEC21



As of Wed Oct 27 22:51:23 2021



HELP SECTION

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.  RASHIFT is used only if BOXFILE is not.

Null Value:  NONE  ( 0 => no shift )
Tasks:
   BOXES.......Adds Clean boxes to BOXFILE around sources from a list.
   CHKFC.......Makes images of Clean boxes from Boxfile.
   FIXBX.......Converts a BOXFILE to another for input to IMAGR.
   IMAGR.......Wide-field and/or wide-frequency Cleaning / imaging
               task.
   SCIMG.......Full-featured imaging plus self-calibration loop with
               editing.
   UVCON....   Generate sample UV coverage given a user defined array
               layout.
Procedures:
   CXPOLN......Procedure to make complex polarization images and beam.
   LINIMAGE....Build image cube from multi-IF data set.

EXPLAIN SECTION


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