AN / SPS-39

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The AN / SPS-39 is a ship-based 3D - airspace surveillance radar long range. It was created by the US Corporation Hughes produced.

description

The SPS-39 was delivered from 1960 and uses the so-called "frequency scanning" technology (FRESCAN) to find the height of radar targets. A wide range of frequencies is used for transmission. A “scan” process starts at a high frequency, which results in the radar signals being sent from the lower part of the antenna. The frequency is now reduced and the location of the radiation moves upwards on the antenna surface. This changes the angle to the radar target, from which its height can ultimately be calculated. This method has the advantage that it does not require any additional mechanical components for height finding and has a higher EloGM resistance, but a relatively large and bulky antenna is also required to ensure precise location.

Most of the systems were equipped with an IFF device over time and received a new, more reliable antenna. The radar is no longer in active service, it has been replaced by the AN / SPS-52 and AN / SPS-48 .

Platforms

Leahy class , Charles F. Adams class , Baltimore class , Farragut class , Brooke class

Technical specifications

  • Frequency range : 2.91 - 3.15 GHz
  • Energy requirement: 1 MW
  • Antenna rotation time: 4 or 12 s
  • Range: 230 - 305 km
  • Maximum detection height: 30 km