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ASR
Airport Surveillance RadarNEC's Airport Surveillance Radar (ASR) is a high performance S-Band radar system designed to provide air traffic controllers with reliable and clear picture of air traffic within its coverage area.
Latest solid-state and digital processing technologies are used to realize improved ground and weather clutter suppression and interference-free output.
Based on its more than 50 years of unique experiences of serving worldwide customers, NEC offers integrated advanced technologies listed below to meet each customer's requirements.
- Benefiting in fully solid-state transmitter and signal processing technologies with system stability
- Clutter rejection by use of dual beam antenna and multi-doppler filter technologies
- A high level of data availability by sliding-window technique to provide aircraft and weather data simultaneously
- Digital pulse compression technique
- Redundant architecture based on a fault tolerant transmitter and duplicated receivers and processing channels with automatic switchover
- Easy and safe maintenance
Technical Characteristics
| Frequency | 2,700 to 2,900 MHz | ||||
|---|---|---|---|---|---|
| Typical instrumented range | 80 nmi. / 45,000ft. | 80 nmi. / 26,000ft. | 60 nmi. / 22,000ft. | 60 nmi. / 35,000ft. | |
| Radar Cross Section | 2 ㎡ | 15 ㎡ | 15 ㎡ | 2 ㎡ | |
| Accuracy (range/azimuth) |
≦ 150 m (range) ≦ 1.5° (azimuth) |
≦ 150 m (range) ≦ 1.5° (azimuth) |
≦ 150 m (range) ≦ 1.5° (azimuth) |
≦ 150 m (range) ≦ 1.5° (azimuth) | |
| Pulsewidth (Long/Short) | 1 μS / 80 μS | 1 μS / 80 μS | 1 μS / 80 μS | 1 μS / 80 μS | |
| Transmitter | Modules | 90 | 54 | 16 | 24 |
| Peak Power | 50 kW | 32 kW | 10 kW | 16 kW | |
| Antenna | Gain | ≧ 34.5 dB | ≧ 34.0 dB | ≧ 34.0 dB | ≧ 33.0 dB |
| Polarization | Linear / circular | Linear / circular | Linear / circular | Linear / circular | |
| Rotation rate | 15 rpm | 15 rpm | 15 rpm | 15 rpm | |
| Beamwidth | 1.3 deg. | 1.3 deg. | 1.3 deg. | 1.4 deg. | |
| Receiver | Subclutter visibility | ≧ 35 dB | ≧ 35 dB | ≧ 33 dB | ≧ 35 dB |
| Pulse compression ratio | 80:1 | 80:1 | 80:1 | 80:1 | |
| Noise figure | ≦ 1.6 dB | ≦ 4 dB | ≦ 4 dB | ≦ 1.6 dB | |
| MTI processing |
6-pulse Multi doppler filter |
6-pulse Multi doppler filter |
6-pulse Multi doppler filter |
6-pulse Multi doppler filter | |
| Weather processing | 6 level | 6 level | - | 4 level | |