Description of the radar set, tactical-technical characteristics
Figure 1: AN/TPS-77 Antenna Group
|frequency:||1,215 to 1,400 MHz|
|pulse repetition time (PRT):|
|pulse repetition frequency (PRF):|
|pulsewidth (τ):||51.2 µs (short range)|
409.6 µs (long-range)
|peak power:||19.9 kW|
|average power:||3.6 kW|
|instrumented range:||5 to 250 NM (10 to 470 km)|
|hits per scan:||1 … 3|
|antenna rotation:||5, 6, 10, 12 rpm|
|MTBCF:||> 2 000 h|
The AN/TPS-77 (formerly known as the AN/TPS-117) is an L-Band, 3-D, tactical transportable long-range air surveillance radar. It is a mobile version of the AN/FPS-117. It features 80 percent commonality with the FPS-117.
The AN/TPS-77 uses an active electronically scanned array (AESA), to generate a number of pencil beams. The planar antenna is made up of 34 rows with 34 solid-state row transmit/receive (TR) modules into a single line replaceable unit (LRU) located on the antenna array and directly coupled to their antenna elements. These TR-modules are called Digital Array Row Transceiver (DART), and employs Gallium Nitride (GaN) technology to provide increased reliability, extend the service life of the radar, and reduce life-cycle costs. The exciter and final receiver are located in the platform electronics unit mounted at the base of the antenna itself.
The radar use a variety of interference rejection techniques. These include greater than 10 percent agile bandwidth, pulse-to-pulse frequency agility, low side-lobes, sidelobe blanking, MTI and constant false alarm rate processing, pseudo-random pulse repetition frequency, pseudo-random beam positioning, and a linear frequency-modulated waveform.
The processing equipment, along with customized operator interface and communications equipment, is located in a single ISO shelter. It can be operated remotely. The whole radar can be deployed in a single C-130 aircraft and by only two medium trucks.