[IEEE Proceedings of the IEEE 1991 National Aerospace and Electronics Conference NAECON 1991 - Dayton, OH, USA (1991.05.20-1991.05.24)] Proceedings of the IEEE 1991 National Aerospace and Electronics Conference NAECON 1991 - Proceedings of the IEEE 1991 National Aerospace and Electronics Conference NAECON 1991 (Cat. No.90CH3007-2)