AN/TPS-77

The AN/TPS-77, formerly designated AN/TPS-117, is an L-band (1215-1400 MHz) 3D tactical transportable long-range air surveillance radar, sharing 80% commonality with the mobile AN/FPS-117. It employs an active electronically scanned array (AESA) to generate multiple pencil beams. The planar antenna features 34 rows, each with 34 solid-state Digital Array Row Transceiver (DART) modules utilizing Gallium Nitride (GaN) technology, directly coupled to their antenna elements for enhanced reliability and reduced life-cycle costs. The radar incorporates various interference rejection techniques, including agile bandwidth, pulse-to-pulse frequency agility, low sidelobes, sidelobe blanking, MTI, constant false alarm rate processing, pseudo-random pulse repetition frequency, pseudo-random beam positioning, and a linear frequency-modulated waveform. With an instrumented range of 10 to 470 km (5 to 250 NM) and a peak power of 19.9 kW, it can achieve 1 to 3 hits per scan at antenna rotation speeds of 5, 6, 10, or 12 RPM. The processing, operator interface, and communications equipment are housed in a single ISO shelter, allowing for remote operation. The entire system can be deployed by a single C-130 aircraft or two medium trucks. The Royal Air Force operates the AN/TPS-77 under the designation AMES Type 92.

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