Plasmoids in Saturn's magnetotail - Hill, TW; Thomsen, MF; Henderson, MG; Tokar, RL; Coates, AJ; McAndrews, HJ; Lewis, GR; Mitchell, DG; Jackman, CM; Russell, CT; Dougherty, MK; Crary, FJ; et al. (JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2008)