User:SeaslugMk2/sandbox

The Type 901 radar was the guidance radar for the Seaslug missile system, with a modified version, Type 901M, for the Mk2 system.

Background
The Type 901 radar project started during the second world war as part of the projected 'Long Range System 1' (LRS1) gunnery control system. LRS1 was never completed but the radar was utilised for the Seaslug missile project. Operating between 9·0GHz and 9·8GHz, it first tracked an aircraft as early as November 1946. At that stage the system looked very different to the tapered drum of the operational system; instead it consisted of two offset feed dishes on a wartime 2pdr pom-pom mounting. One dish was for the tracking beam and the other dish was for the gathering/guiding beams. By mid 1951 experimental missiles were riding a stationary beam, and by the end of that year they were riding a jitter-free moving beam. By the spring of 1952 missiles had been gathered at 'a relatively high elevation' and had successfully ridden a beam in the presence of jitter.

Notes.
Some of the information is taken from SR Jenkins' website (http://www.littlewars.org.uk) with the author's permission.