Description of the radar set, tactical-technical characteristics
Figure 1: ARSR-3
|frequency:||1 250 … 1 350 MHz
|pulse repetition time (PRT):|
|pulse repetition frequency (PRF):||310 … 365 Hz|
|pulsewidth (τ):||2 µs|
|peak power:||5 MW|
|average power:||3.3 kW|
|instrumented range:||240 NM (≙ 445 km)|
|range resolution:||450 m|
|hits per scan:|
|antenna rotation:||5 min⁻¹|
ARSR-3 is operating in L-Band long-range air surveillance radar. It was used to detect azimuth and range of en-route aircraft operating between FAA terminal areas.
ARSR-3 is a dual channel radar with two separate transmitter with each a powerful klystron, receiver and signal-processing channels utilizing adjacent frequencies. A minimum frequency separation of 25 MHz and orthogonal polarization prevents co-interference. The common radar data processing is done by using an 8-bit processor. The reflector antenna provides a cosecant squared beam shaping. It also allows improved high-elevation short-range cover by using a low beam for long range low altitude cover and a slightly higher beam which minimizes clutter at short ranges. In addition, the ARSR-3 has a weather channel with associated processing to provide weather contour information in digital format.
The first installation took place at the FAA Aeronautical Center in Oklahoma City in July 1978. ARSR-3 was replaced by the 3D- radar ARSR-4 since the 1990s.