Re:broadband imaging (Score 1)

We'd call it medium-band imaging (about 10%), but we're lucky in that we don't expect narrow emission lines in this region and that we're about to be checked soon (I hope) by the high-resolution Composite Infrared Spectrometer (CIRS) on board the Cassini spacecraft. The atmospheric opacity is supplied by a spectrally broad quasi-"continuum" absorption arising from a collision-induced dipole of molecular hydrogen (a very weak absorber, but all the outer planets have PLENTY of it!) Glenn Orton, JPL (co-discoverer)