Institution: | (1) Jet Propulsion Laboratory, California Institute of Technology, Pasadena, U.S.A.;(2) Max Planck Institut für Aeronomie, 3411 Katlenburg, D3411 Lindau, Germany;(3) International University of Bremen, P.O. Box 750 561, 28725 Bremen, Germany;(4) Indian Institute of Geomagnetism, Colaba, Mumbai/Bombay, 400-005, India |