Combines the spatial dimensions of up to 20 datasets to produce one output Asterix dataset. If datasets with more than 2 dimensions are supplied (eg. spectral images), then the number and sizes of the non-spatial dimensions must match. Otherwise arrays of any size may be added, and if astrometry is available, files with different pixel sizes and / or rotations will be correctly superimposed.
NB: This command is not part of the interactive image processing
system and does not require it to be active.