1 Unit for Space Sciences, University of Kent, Canterbury Kent CT2 7NR U.K. 2 Istituto Universitario Navale 80133 Napoli Italy 3 Martin Marietta Denver, CO 80201 U.S.A. 4 Osservatorio Astronomico di Capodimonte Napoli 80131 Italy 5 CNRS, Service d'Aeronomie 91371 Verrieres le Buisson Cedex France 6 Physics Institute, University of Bern, CH-3012 Switzerland 7 Department of Astronomy, University of Florida Gainesville, FL 32611 U.S.A. 8 Max-Planck-Institut für Kernphysik, Postfach 103980 D-69029 Heidelberg Germany 9 Department of Physics, University of Sheffield Sheffield S10 7RH U.K. 10 Applied Optics Group, University of Kent, Canterbury Kent CT2 7NR U.K. 11 Laboratoire d'Astronomie Spatiale, Traverse du Siphon 13376 Marseille Cedex 12 France 12 Universite Paris-Sud, Laboratoire Rene Bernas 91406 Orsay Cedex France 13 Max-Planck-Institut für Aeronomie W-3411 Katlenburg-Lindau Germany 14 Department of Experimental Physics, St Patricks College Maynooth, Co. Kildare Ireland 15 Department of Physics, Baylor University Waco, TX 76798-7303 U.S.A. 16 Jet Propulsion Laboratory Pasadena, CA 91109 U.S.A. |