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ARSR-3

Description of the radar set, tactical-technical characteristics

Figure 1: ARSR-3

Figure 1: ARSR-3

Specifications
frequency: 1 250 … 1 350 MHz
(L-Band)
pulse repetition time (PRT):
pulse repetition frequency (PRF): 310 … 365 Hz
pulsewidth (τ): 2 µs
receive time:
dead time:
peak power: 5 MW
average power: 3.3 kW
instrumented range: 240 NM (≙ 445 km)
range resolution: 450 m
accuracy:
beamwidth: 1.1°
hits per scan:
antenna rotation: 5 min⁻¹
MTBCF:
MTTR:

ARSR-3

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.