Small- and large scale features of energy-dispersed ions in the PSBL observed simultaneously in both hemispheres by CLUSTER, GEOTAIL, and IMAGE A. Keiling (1), H. Reme (1), I. Dandouras (1), J.M. Bosqued (1), V. Sergeev (2), G.K. Parks (3), M. McCarthy (4), E. Moebius (5), E. Amata (6), B. Klecker (7), A. Korth (8), R. Lundin (9), T. Mukai (10), H. Frey (3) (1) Centre d Etude Spatiale des Rayonnements, Toulouse, France (2) Institute of Physics, St. Petersburg State University, St. Petersburg, Russia (3) Space Science Laboratory, UC Berkeley, USA (4) Geophysics, University of Washington, Seattle, USA (5) University of New Hampshire, Durham, USA (6) Instituto di Fisca dello Spazio Interplanetario, Roma, Italy (7) Max-Planck-Institut fur Extraterrestrische Physik, Garching, Germany (8) Max-Planck-Institut fur Aeronomie, Katlenburg-Lindau, Germany (9) Swedish Institute of Space Physics, Kiruna, Sweden (10) Institute of Space and Astronautical Science, Sagamihara, Japan We present the first simultaneous observations of energy-dispersed ions in the plasma sheet boundary layer of both hemispheres and at very different distances (4.5 Re and 23 Re) in the magnetotail. ClusterÍs multipoint measurement capability allowed us to study in great detail the intricate nature of two complex events that showed a lot of fine structure. Many new properties could be identified associated with the energy range, the energy dispersion types, and a beamlet sub-structure. The ion beamlets showed both temporal and spatial effects. We propose an injection scenario in the distant current sheet to understand the spatio-temporal history of these energy-dispersed ion beamlets. Simultaneous observations by Geotail in the opposite hemisphere are used to verify the interpretations drawn from the Cluster observations. Furthermore, IMAGE ultraviolet images show that Cluster and Geotail were magnetically conjugate to the poleward arc of the double oval suggesting a causal connection between these two phenomena. Thus, our study investigates both local and global features of energy-dispersed ions in the magnetosphere. _______________ Presented at the 35th COSPAR Scientific Assembly, Paris, France, July 18-25, 2004.