AN/SPN-18
Description of the radar set, tactical-technical characteristics
Figure 1: AN/SPN-18 used the same antenna as AN/SPN-11.
| Specifications | |
|---|---|
| frequency: | 9 320 … 9 430 MHz
(X-Band) |
| pulse repetition time (PRT): | |
| pulse repetition frequency (PRF): | 800 or 2 000 Hz |
| pulsewidth (τ): | 0.25 or 0.65 µs |
| receiving time: | |
| dead time: | |
| peak power: | 40 kW |
| average power: | 20 W |
| instrumented range: | 40 NM (≙ 75 km) |
| range resolution: | 46 m |
| accuracy: | 2%, 1° |
| beamwidth: | β=1,9°; ε=20° |
| hits per scan: | 20 |
| antenna rotation: | 9 rpm |
| MTBCF: | |
| MTTR: | |
AN/SPN-18
AN/SPN-18 is operating in the X-Band navigation and surface surveillance radar. It provides anticollision data, piloting information through observation of shorelines, buoys, and channel markers, and storm warning data by tracking heavy rain or snow squalls.
The AN/SPN-18 is a further development of the AN/SPN-11 with higher pulse power and a possible switching of the pulse duration for a larger energetic range. The AN/SPN-18 is operated from a DC power source, while the AN/SPN-18X is operated from an AC source.
Source:
- Military Standardization Handbook United States Radar Equipment Manual TM 11-487C-1 1965, p. 1188ff
(The obvious misprint in the handbook with the pulse lengths could be corrected mathematically by the pulse repetition frequency and the specified duty cycle.)