1. a Physics Department , Royal Military College of Canada , P.O. Box 17000 STN FORCES, Kingston, Ontario, K7K 7B4 E-mail:
2. b Physics Department , Royal Military College of Canada , P.O. Box 17000 STN FORCES, Kingston, Ontario, K7K 7B4
3. c Rosenstiel School of Marine and Atmospheric Science , University of Miami , Miami, FL, USA