ASR 4
Description of the radar set, tactical-technical characteristics
Figure 1: Antenna of the ASR 4
© 1966 Alberto Castro www.acastro.es
| Specifications | |
|---|---|
| frequency: | 2 700 - 2 900 MHz
(S-Band) |
| pulse repetition time (PRT): | |
| pulse repetition frequency (PRF): | 700 - 1200 Hz |
| pulsewidth (τ): | 0.8 µs |
| receive time: | |
| dead time: | |
| peak power: | 425 kW |
| average power: | 300 … 400 W |
| instrumented range: | 60 NM (≙ 111 km) |
| range resolution: | |
| accuracy: | |
| beamwidth: | 1.5° |
| hits per scan: | |
| antenna rotation: | 15 rpm |
| MTBCF: | |
| MTTR: | |
ASR 4
The ASR 4 was one of the first civil air traffic control radars in the United states. The first radar sets were installed in spring 1959 at Newark (New Jersey) and at Orlando (Florida). The ASR 4 has a range of 60 miles at up to 25,000 ft and incorporates video mapping, MTI and devices to eliminate rain clutter. It used the mechanical tunable magnetron of the type 5586 of the company Ratheon.
TI’s radars have been selected over all competition by a dozen countries as well as the FAA and the U.S. Air Force, Navy and Army. In all, 175 airports used the ASR 4 and later versions, the ASR 5 and ASR 6. It was replaced by the ASR 9 since 1989.
ASR 4 used on military airfields received the designation AN/FPN-51.
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