Location accuracy in X-band multifunction radar

The existing and operationally proven X-band multifunction surface-based radar ARABEL is described. The salient points regarding the design are considered, including: phased array control; multiple waveform management; high performance in detection and location; real-time multifunction operation; and weight and size operational constraints. The final impact upon performance is measured in terms of target location accuracy, in a terrestrial referential: all mechanical and electronic contributions are accounted for in a comprehensive simulation of the total accuracy. Results of simulations are in good agreement with field measurements. The total angular root-mean-square (rms) accuracy is better than 3 mrad. This corresponds to a probability of 70% of not exceeding the guaranteed figure, for the checked Rayleigh distribution law