1. Research & Development Department, Yokogawa Electric Corporation, 2-9-32 Nakacho, Musashino-shi, Tokyo 180-8750, Japan
2. Department of Marine Electronics and Mechanical Engineering, Tokyo University of Marine Science and Technology, 2-1-6 Etchujima, Koto-ku, Tokyo 135-8533, Japan
3. Kernow Analytical Technology Ltd, Unit 2B, Rural
Workshops, North Petherwin, Launceston, Cornwall, PL15 8TE, U.K.