Abstract: A system (100) for subject (50) detection is disclosed. The system (100) comprises a plurality of radar systems (21, 31). Each radar system (21, 31) comprises an antenna configured to transmit an electromagnetic signal and to detect reflections of the electromagnetic signal and determine a plurality of data points corresponding with the position of reflectors. The system also comprises a processor (10) configured to receive the plurality of data points from each radar system (21. 31), and to process the data points to detect and/or track a subject (50) therefrom. Each of the radar systems (21, 31) has a boresight (22, 32), corresponding with an axis of maximum antenna gain for the electromagnetic signal. The plurality of radar systems (21, 31) comprises a first radar system (21) with a first boresight (22) and a second radar system (31) with a second boresight (32). The first boresight (22) is at an angle of at least 25 degrees to the second boresight (32).