Affiliations 1 McDonnell Center for Space Sciences,
Department of Physics, Washington University, 1 Brooking Drive, CB 1105, St Louis, MO 63130-4899, United States
Ramanath Cowsik
McDonnell Center for Space Sciences,
Department of Physics, Washington University, 1 Brooking Drive, CB 1105, St Louis, MO 63130-4899, United States