Mark III (radio telescope)
The Mark III was a portable and fully steerable radio telescope located at Wardle, near Nantwich, Cheshire in the north-west of England. Constructed in 1966, it was remotely controlled from Jodrell Bank Observatory, and was mainly used as part of the MERLIN radio telescope network. It was designed by Charles Husband at the instigation of Bernard Lovell. Technical specifications Funding for the telescope was obtained in 1963 from the DSIR. The telescope was designed by Husband and Co. consulting engineers, and was constructed by Fairey Engineering. It started observations in July 1967. The telescope could be controlled either locally, or by remote control over UHF and microwave links from Jodrell Bank Observatory (normally the latter). Similar to the Mark II, it had an elliptical dish with a major axis of 125 ft/38.1m and a minor axis of 83 ft 4 in/25.4m. Unlike the Mark II, however, the dish is constructed of a wire mesh, with the wires apart set to an accuracy of . When pointed to the horizon, the telescope was 81% efficient at wavelengths of 21 cm (the hydrogen line), dropping to 45% at 11 cm. When the bowl was pointed to the horizon, the structure deformed slightly