Ratio of the flux densities measured by HFI and computed from the ESA2 (Uranus, top) and ESA3 (Neptune, bottom) models from Moreno (2010). At 545 and 857  GHz, the measurements are not independent measurements of the planet flux densities, since the 545 and 857  GHz channels have been re-calibrated to match the average of the Uranus and Neptune flux density given by the models.