W. N. Brandt

¹Department of Space Science, Southwest Research Institute, P.O. Box 28510, San Antonio, TX 77228-0510, USA. ; ²Institute of Astronomy, University of Cambridge, Cambridge CB3 OHA, UK. ; ³Max-Planck-Institut für extraterrestrische Physik, Postfach 1603, D-85740 Garching, Germany ; ⁴Space Physics Research Laboratory, University of Michigan, Ann Arbor, MI 48109, USA. ; ⁵Space Sciences Laboratory, University of California, Berkeley, CA 94720, USA. ; ⁶Jet Propulsion Laboratory, Pasadena, CA 91109, USA.