AIPS NRAO AIPS HELP file for SLICE in 31DEC18



As of Tue Sep 18 9:49:15 2018


SLICE: Task to make a slice file from an image

INPUTS

INNAME                             Image name (name)
INCLASS                            Image name (class)
INSEQ           0.0      9999.0    Image name (seq. #)
INDISK          0.0         9.0    Disk drive #
BLC             0.0      4096.0    Beginning of slice
TRC             0.0      4096.0    End of slice
OUTTEXT
                                   Disk file to write slice text
                                   output. Default (blank) = do
                                   not write disk file.
DOKEEP         -1.0         1.0    > 0 keep simple slices
                                   matching input (no interp)

HELP SECTION

SLICE
Type: Task
Use:  SLICE will create an extension file of type SL containing
      a one dimensional slice associated with an image.  The task has
      traditionally managed slices only on arbitrary straight lines
      (in pixel space) in the X-Y plane, requiring BLC(3)=TRC(3), etc.
      The slices are interpolated onto a fairly fine grid.  If the
      slice is perely along an FQID axis, the data will be
      interpolated onto a grid which is regular in frequency.

      The ability to make a slice purely along one axis numbered > 2
      has been added.  In this case, for example, BLC(1)=TRC(1),
      BLC(2)=TRC(2), BLC(3) not = TRC(3), BLC(4)=TRC(4), etc.  This is
      equivalent to ISPEC run on a single X-Y pixel area.
Adverbs:
  INNAME......Image name (name).      Standard defaults.
  INCLASS.....Image name (class).     Standard defaults.
  INSEQ.......Image name (seq. #).    0 => highest.
  INDISK......Disk unit #.            0 => any.
  BLC.........The location of one end of the line defining the
              slice. (0,0) = (1,1)
  TRC.........The location of the other end of the line defining
              the slice. (0,0) => image top right hand corner.
              Note that BLC(i) > TRC(i) is allowed for I=1,2 and
              changes the direction of the slice values.  When doing a
              slice along an axis > 2, the BLC(i) and TRC(i) are
              forced to have the usual order by swapping if needed.
  OUTTEXT.....A file external to the AIPS system into which the
              slice output is to be written. Output is in the
              format of x, y pixel position, interpolated slice value,
              and the the X, Y, Z coordinate values in degress, Hz,
              etc.
  DOKEEP......> 0 => do not interpolate the image.  This only works if
                     the slice is exactly along the X or Y axis.
                     Slices along the Z axis are treated as if
                     DOKEEP=1 always.

EXPLAIN SECTION


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