AIPS HELP file for SLICE in 31DEC22
As of Tue Feb 7 14:50:41 2023
SLICE: Task to make a slice file from an image
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
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)
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.
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,
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