Bruce Murray Space Image LibraryCassini ISS narrowband filter transmission Cassini ISS narrowband filter transmission System transmission functions for the NAC and WAC narrow-band filters. NAC filters are as follows: MT1, MT2, MT3 (purple: solid, dotted, and dashed); CB1, CB2, CB3 (green: solid, dotted, and dashed); and HAL (red). WAC filters are HAL (red), MT2, MT3 (purple: solid and dashed); CB2 and CB3 (green: solid and dashed). The geometric albedo of Titan is also given (solid black) to illustrate the placement of the methane band and continuum filters relative to the methane features in the spectrum of Titan. Porco et al. 2004 (DOI: 10.1007/s11214-004-1456-7)Figure 21 from "Cassini Imaging Science: Instrument Characteristics And Anticipated Scientific Investigations At Saturn"Article available for download for free here.