CATEC has an indoor testbed for the validation of air traffic automation techniques and multi-vehicle systems (both coordination and cooperation). This testbed is based on an indoor positioning system that uses 20 VICON cameras. This system can calculate the position and attitude of any moving object within the volume of the testbed (15x15x5 m) in real time (with an update rate of up to 500 Hz). Finally, the testbed is integrated with a software development system that allows the simulation of the algorithms before testing them on the testbed.