Description of the radar set, tactical-technical characteristics
Figure 1: AN/SPS-38 (XN-1)
|frequency:||510 … 690 MHz
|pulse repetition time (PRT):|
|pulse repetition frequency (PRF):|
|hits per scan:|
|antenna rotation:||5 or 15 min⁻¹|
AN/SPS-38 (XN-1) was a naval radar operating in the UHF-Band which did not go beyond the prototype design. With a total weight of 10 tons, it was one of the largest and heaviest naval radars.
The transmitter was extremely frequency agile. It could be switched on one of the 45 different frequencies in the given band either manually, automatically according to a time schedule, or in random order. Thus this radar could not interfere with jamming equipment available at that time! The antenna was hydraulically stabilized against ship heeling (pitch and roll), which is why on the only existing picture the antenna is shown standing in a mechanical stop. In normal operation, it would be aligned horizontally. The antenna consisted of an antenna array of 150 horn radiators (5 × 30) as well as the corresponding waveguides and power splitters for feeding.
Although training courses for the operators were already organized, delivery to the Navy did not take place because the radar became too expensive compared to an alternative modernization of its predecessor AN/SPS-37.