This program will import fits (Flexible Image Transport System) files into
Isis format. Only simple fits files are accepted. Extensions are not
support and files with no initial data, NAXIS = 0 , implying extensions with
data, are not supported either. Some common header data is transfered to
Isis labels. Primary image data is transfered completely and reliably.
Use this parameter to select the filename of a fits file to be
converted to a cube. Currently extensions and files with no initial
data, NAXIS = 0, are not supported.