The file contains one line for each slice. Each line contains four numerical fields separated by white space (any number of spaces or tabs). The first two give the y positions of the top and bottom of the slice, the other two give the x and y shift needed to align the slices. All of these should be integers except for the y-shift. Blank lines and any text following a # will be ignored. The slices should be listed in the order in which they are arranged in the two dimensional field of view, not the order in which they are arranged on the raw IFU image. This is important because the slices will be put into the final datacube in the order in which they are listed here.
ORAC-DR -- integral field spectroscopy data reduction