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Published online by Cambridge University Press: 14 August 2015
The success of Stecher and Milligan (1962) in obtaining UV photoelectric objective dispersion spectra of stars in 1962 inspired similar work at the Royal Observatory, Edinburgh. For a number of reasons we preferred to build a system using grating dispersion in the convergent beam from a 21-cm diameter paraboloidal mirror (Sudbury, 1969). The same principle of random sky scan from a spinning rocket was employed.