1. a Canadian Hydrographic Service , Bedford Institute of Oceanography , Polaris, 2nd Floor--PO Box 1006, Dartmouth, Nova Scotia, Canada , B2Y 4A2
2. b Canada Centre for Remote Sensing , 588 Booth Street, Ottawa, Ontario, Canada , K1A 0Y7
3. c Helical Systems Limited , 1 Research Drive, Dartmouth, Nova Scotia, Canada , B2Y 4M9