An icing detection system based on optical refractometric techniques is decribed in the proposal. The first omega group, inc. Proposes to demonstrate the applicability of this concept to enable the construction of instrumentation that automatically determines the onset, duration, accu mulation and dissolution of icing on airport runways, parkedaircraft, airport navigational aid structures, etc. The objective of phase i is a laboratory demonstration. In phase ii, a production prototype instrument will be designed, constructed and field tested. If proven feasible, this concept enables a new class icing determination instrument ation to be built for the transportation and appliance markets.
