Description of the radar set, tactical-technical characteristics
Figure 1: Antenna ATZ of Type 978 radar
|frequency:||9 410 MHz
|pulse repetition time (PRT):|
|pulse repetition frequency (PRF):||1 000 or 2 000 Hz|
|pulsewidth (τ):||1 µs or 0.2 µs|
|instrumented range:||40 NM (≙ 74 km)|
|range resolution:||< 46 m|
|hits per scan:|
|antenna rotation:||20 or 24 min⁻¹|
Type 978 was operating in X-Band surface warning and navigation radar for British destroyers and frigates. This radar replaced the earlier Type 277Q. Later it was also replaced by Type 1006.
The antenna ATZ is a 6 feet wide double-cheese, the upper for transmission, the lower for reception. The speed of rotation depends on the feed with either 50 or 60 Hz mains voltage.