AN/TPS-73

The AN/TPS-73 is a solid-state S-band (2.7-2.9 GHz) primary surveillance radar designed for air traffic control, gap-filling, and surveillance duties, capable of long-range tactical operations up to 110 km (60 NM). Manufactured by Alenia (later Selex ES, now Leonardo) and also by Paramax (Unisys) and Lockheed Martin Tactical Defense Systems, it was sold under license as the Argos 73. This multi-functional system integrates with a monopulse secondary surveillance radar and employs pulse-to-pulse frequency agility, low-peak-power-coded waveforms, and a 10 kW peak power transmitter with solid-state modules (300 W each) for survivability and high target visibility in adverse clutter and electronic countermeasures (ECM) environments. Its Alenia-built open-mesh, truncated paraboloid antenna, illuminated by dual beams, supports horizontal or circular polarization, while the low-noise receiver utilizes Adaptive Moving-Target Detection (AMTD) and high-resolution ground-clutter maps for suppression, alongside range/azimuth adaptive thresholding of Doppler filters to enhance target sensitivity. The plot extractor can simultaneously manage 600 known tracks or 300 tentative tracks, and the system features automatic selection of unjammed frequencies to counter ECM. Contained within a single 10-foot ISO shelter, which also stores antenna components during transport, the AN/TPS-73 is transportable by land, sea, or air (C-130, CH-53). The U.S. Marine Corps acquired 18 AN/TPS-73 radars in 1990 as part of the Marine Air Traffic Control And Landing System (MATCALS) and deployed them during the Iraq War; it is slated for replacement by the AN/TPS-80 G/ATOR multi-function radar.

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