GPS-3 Long Range Search Radar Set - A Long Range backup Search Radar set built by General Electric in the 1950s. This set consisted primarily of FPS-8 components and was considered a stripped down variant of the FPS-8.
GPS-3 Search Radar
Text Adapted from Mil-HDBK-162A 15 Dec 1965.
Radar Set GPS-3 is used to back-up the search function of a primary surveillance radar set. The GPS-3 equipment has a maximum target detection range of 220 nautical miles using normal video. The antenna reflector mounted on Tower AB-397/FPS-8 may be manually preset to the desired angle of vertical tilt and may be rotated in forward or reverse direction through 360 degrees in azimuth. The reflector may be scanned through any sector of 40 to 120 degrees with the center of the sector at any azimuth position.
This radar set includes a coherent video cancellation type of a range indicator, and a PPI for monitoring received target video or for general testing. The antenna circuits for IFF equipment are included in Radar Set GPS-3. The GPS-3 is composed of a surveillance radar set, Tower AB-397/FPS-8, and Radar Recognition Set UPX-6.
Either Arctic Tower AB-313/FPS-8 or Temperate Tower AB-397/FPS-8 is used with Radar Set GPS-3, depending upon environmental conditions. When the GPS-3 is used in an arctic installation, the power requirement is increased by 60 kilowatts by the addition of radome heat banks.