Abstract: In a target simulation system for measurement and functional testing of an active optronic target tracking system its search head (12) which is mounted on a turntable (11), a pilot beam source (26), a target simulation beam generator (21) and a test camera (20) are directed on to the same side of a projection surface (18). By means of a pilot beam (27), defined points, provided with sensors (25), of the projection surface (18), relative to the apparatus installation, and then the directional control of the turntable (11), are measured. The search head receiver (14) controls tracking of a target simulation point (23) which moves over the projection surface (18) and whose movement is detected in terms of co-ordinates by the camera (20) in order to compare same to the search head movement.