Aerospace Dictionary

Secondary surveillance – Aerospace Dictionary

secondary surveillance –  radar Ground radar which interrogates air traffic with identifiable codes of pulses, triggers distinctive response from each target, extracts plots and assigns identity to each, normally presented as
flight number, altitude and other information beside target on radar display [Mode A provides coded target identiy, C altitude and S selective interrogation]. Aerial normally slaved in azimuth to main surveillance (primary) radar and may be on-mounted. 







Courtesy:The Cambridge Aerospace Dictionary