Description of the radar set, tactical-technical characteristics
Figure 1: Mk. 22 (“orange peel” antenna)
and Mk. 12 (rectangle antenna)
|frequency:||9 375 ± 30 MHz
|pulse repetition time (PRT):|
|pulse repetition frequency (PRF):||480 Hz or 1 639 Hz|
|pulsewidth (τ):||0.5 µs|
|peak power:||25 … 35 kW|
|average power:||7 W or 25 W|
|instrumented range:||10 NM (≙ 18 km)|
|range resolution:||90 m|
|beamwidth:||β= 1.2° ;ε= 4.5°|
|hits per scan:|
Mk. 22 is operating in the X-Band Fire Control System (FCS). It is designed as an auxiliary equipment for use as an elevation finder in conjunction with the radars Mk. 4 and Mk. 12. It furbishes elevation and range information on low-angle targets.
The reflector is an elliptically shaped, cut paraboloid of open-grate construction. It is 6 feet high by 1½ feet wide by 2½ feet deep and provides a beavertail pattern. The antenna mechanically scans in the vertical plane over an elevation angle of 13° at a rate of 2 scans per second.