1. A target identifier comprising one or more computing devices having machine readable instructions, the target identifier being configured to: determine a synthesized profile for a target based on active sensor data that characterizes a radio frequency (“RF”) signal transmitted by an active sensor system and reflected by the target and received at the active sensor system, wherein the synthesized profile characterizes an estimated Line of Bearing (“LoB”) and a radial speed (“Rdot”) of the target relative to a passive sensor system; and match the synthesized profile with a measured profile that is determined based on RF signals that are transmitted by the target or RF signals broadcast by a communication system that are reflected by the target and the RF signals are received at the passive sensor system, wherein the measured profile characterizes a measured LoB and a measured Rdot of the target.