Mech, M., Crewell, S., Meirold-Mautner, I., Prigent, C., and Chaboureau, J.-P.: Information content of millimeter observations for hydrometeor properties in mid–latitudes. IEEE Transactions on Geosci. Remote Sens., 45(7), 2287–2299, doi:10.1109/TGRS.2007.898261, 2007.