ASMI-18X
Description of the radar set, tactical-technical characteristics

Figure 1: ASMI-18X on the ATC-tower of London Gatwick Airport, West Sussex, Great Britain
(© 1982 N. Chadwick, cc-by-sa/2.0)

Figure 1: ASMI-18X on the ATC-tower of London Gatwick Airport, West Sussex, Great Britain
(© 1982 N. Chadwick, cc-by-sa/2.0)

Specifications | |
---|---|
frequency: | 9 410 MHz
(X-Band) |
pulse repetition time (PRT): | 250 µs |
pulse repetition frequency (PRF): | 4 kHz |
pulsewidth (τ): | 40 ns |
receiving time: | 54 µs |
dead time: | 196 µs |
peak power: | 20 kW |
average power: | 200 W |
instrumented range: | 8 km |
range resolution: | 6 m |
accuracy: | |
beamwidth: | 0.43° |
hits per scan: | |
antenna rotation: | 60 rpm |
MTBCF: | |
MTTR: |
ASMI-18X
ASMI-18X (Airport Surface Movement Indicator) is operating in the X-Band surface movement radar.
The antenna is an 18 feet wide (≙ 5.5 m) slotted waveguide radiator horizontally polarized and providing 36 dB gain and fan-beam pattern with a vertically opening of 15 degrees. The radar’s sensitivity is sufficient to detect a crawling person at 2 km on the runways, and the resolution is sufficient to clearly show the shape of large aircraft.
This radar was developed by RACALL Avionics in 1980.
Source:
- J.D. Holcroft, S.J. Martin: “ASMI-18X, an airport surface surveillance radar”, in IEE RADAR-82, 1982, ISSN: 0537-9989, p. 311-315.