This routine creates multiple
output NDFs by dicing a supplied 2D- or 3D- NDF up into JSA tiles (i.e. it is the inverse of
JSAPASTER). The spatial WCS of the input NDF must matches the JSA all-sky grid.
= NDF (Read)
The input 2D or 3D NDF - it need not have been created by a smurf task.
Currently, it should be gridded on the JSA all-sky pixel grid, which means that in practice it
probably will have been created by MAKEMAP or MAKECUBE.
INSTRUMENT = LITERAL
The JCMT instrument (different instruments have different tiling schemes and pixel
sizes). The following instrument names are recognised (unambiguous abbreviations may be
" . The dynamic default is
determined from the input NDF if possible. If this cannot be done, then no dynamic default is
provided, and the user is prompted for a value if none was supplied on the command line. 
JSATILELIST() = _INTEGER (Write)
Returned holding the zero-based indices of the
created JSA tiles. The number of such indices is given the
= _INTEGER (Write)
AN output parameter which is returned holding the number of
output NDFs created.
OUT = NDF (Write)
The base-name for the output NDFs. The
names will be formed by appending the tile number to the basename, preceded by an
underscore. A null(!) value causes the name of the input NDF to be used. [!]
The name of a text file to create, in which to put the names of all the output
NDFs created by this application via parameter OUT (one per line). If a null (!) value is
supplied no file is created. [!]
PROJ = LITERAL (Read)
Determines the projection used by
the output NDFs. The allowed values are
" (HPX projection centred on RA=0h),
" (HPX projection centred on RA=12h),
" (XPH projection centred on the north
" (XPH projection centred on the south pole). A null (!) value causes
" to be used. [
TRIM = _INTEGER (Read)
A zero or negative value results
in each output NDF covering the full area of the corresponding JSAtile. A value of one
results in each output NDF being cropped to the bounds of the supplied NDF. A value of
two or more results in each output NDF being cropped to remove any blank borders.