Institution: | 1. Max-Planck-Institut für hysik und Astrophysik, Institut für Extraterrestrische Physik, 8046 Garching, F.R.G.;2. School of Physics, The University of Sussex, Brighton, BN1 9QH, U.K.;3. Department of Physics, The University of Sheffield, Sheffield, S37RH, U.K.;4. Department of Physics and Astronomy, University of Iowa, Iowa City, IA 52242, U.S.A.;6. Space Sciences Division, University of Washington, Seattle, WA 98195, U.S.A.;5. The Aerospace Corporation, Los Angeles, CA 90009, U.S.A.;1. Department of Physics, Umeå University, SE-901 87 Umeå, Sweden;2. Department of Physics, Linköping University, SE-581 83 Linköping, Sweden |