AN/SPS-4
History
The AN/SPS-4 was a C-Band high resolution surface search and zenith air search radar for moderate size naval vessels. It used a dual antenna consisting of a paraboloid surface reflector, and a spherically zenith reflector, which permits the operator to observe targets either on and near the surface of the water or approaching from overhead.
AN/SPS-4 was first delivered in 1952. As aircraft speeds rose, the zenith search function was no longer relevant (due to it's short range) so it was disabled from 1958 onwards.
Used on
Affiliated systems
Part description
2 versions are drawn in the part: on the left the zenith search antenna, on the right the surface search only antenna.
See also
https://www.radartutorial.eu/19.kartei/11.ancient2/karte025.en.html
