This routine creates a single
output NDF by pasting together a supplied list of 2D- or 3D- JSA tiles (i.e. it is the inverse of
JSADICER). The spatial WCS of each input NDF must matches the JSA all-sky pixel grid. The output
NDF will usually be gridded using an HPX projection, but an XPH projection will be used if the
mosaic would cross a discontinuity in the HPX projection.
IN = NDF (Read)
of input JSA tiles.
INSTRUMENT = LITERAL (Read)
The JCMT instrument (different instruments
have different tiling schemes and pixel sizes). The following instrument names are recognised
(unambiguous abbreviations may be supplied):
" . 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. 
OUT = NDF (Write)
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