The individual frames with slices extracted and approximately aligned have the suffix _ext. The flat-fielded, scrunched, sky-subtracted pairs have the suffix _scr. No datacube is formed from individual frames or pairs.
Several group files are created (with names starting gu). The coadded scrunched 2-d spectrum has the suffix _scr. This is formed into a datacube with the suffix _cub. A white-light image is extracted from this datacube with the suffix _im.
ORAC-DR -- integral field spectroscopy data reduction