1. An interceptor-based sensor comprising: a track clustering element to cluster tracks of objects to generate track clusters based on an uncertainty associated with each track; a feature generating element to generate feature vectors for the track clusters in one or more directions with respect to a cluster under test, the feature vectors comprising one or more of a cluster count feature vector (N), a cluster population density feature vector (P), a cluster proximity feature vector (r), a cluster-weighted centroid feature vector (L) and a cluster scattering feature vector (θ); and a track selection element to associate tracks provided by another sensor based on belief functions generated from the feature vectors, the track selection element to select one of the tracks corresponding to a track of interest.