True multi-radar tracking for air defence C3 systems

A typical C³ system for air defence requires a clear and unambiguous air picture for efficient management of the air defence resources. Often a number of surveillance radars provide the main input data. Some kind of multi-radar tracking is then desirable for integrating the radar data to form the air picture. A number of different multi-radar tracking principles are in use. A number of important problems have to be addressed when designing a multi-radar tracking system. Bias errors, slant range errors, processing administration, and automatic track initiation are discussed, and the approach to these problems used in a recently developed commercial system is briefly considered