Absolute disk-integrated model flux density predictions for Callisto, Ganymede, and Titan in the Herschel-centric reference system and at the epoch of the corresponding PACS measurements. The minimum-maximum model predictions for Uranus (“ura_esa2_2_i.dat”) and Neptune refer to all available PACS measurements during the entire Herschel mission. The PACS band-passes are shown in arbitrary units. The blue, green, and red bands have peak transmissions of 51%, 56%, and 46%, respectively.