From the operational viewpoint tracking radars are considered to be well suited for incorporating high-performance target recognition modes, while maintaining the main tracking function. Active-phased array radars can also support high-resolution modes, but are more constrained by design architecture issues than the trackers. Active arrays with fixed faces have more time available than the rotating designs, so can support modes with longer dwell periods. The passive-phased array radars are the most difficult for incorporating a target recognition function, while maintaining the key operating functions of the radar. However, passive array designs, which include an azimuthal squint capability, provide potential for increasing the dwell period for implementing stepped frequency high-range resolution modes. Phased array radars have surveillance and tracking functions to perform, so target recognition modes have to be implemented within already tight resourcing budgets. For environments with large numbers of targets to be recognised, radars are under development that are to be specifically used for target recognition. For systems, such as tracker radars, that can operate with very short engagement timelines, the target identity decisions would be made automatically. For longer range surveillance and multi-function radars, there would normally be sufficient time for the operator to study the signature data and the computer's recommendations and make the final decision on the target's identity and the appropriate response to the threat.

Inspec keywords: radar resolution; search radar; phased array radar; radar target recognition

Other keywords: passive array designs; operational issues; surveillance functions; active-phased array radars; tracking functions; radar target recognition; longer range surveillance; tracking radars; high-resolution modes; multifunction radars; azimuthal squint capability

Subjects: Radar equipment, systems and applications