Abstract
AN attitude stabilized1 Skylark rocket was successfully launched from Woomera, S. Australia, at 05.27 UT on March 20, 1968. Included in the rocket experimental payload were two grazing incidence spectrographs2 from the Astrophysical Research Unit at Culham Laboratory, The wavelength ranges covered by the spectrographs were (A) ∼ 12 Å to 70 Å and (B) ∼ 140 Å to 500 Å, and both instruments carried thin (t≈600 Å) aluminium filters3 over the entrance slits to exclude the intense longer wavelength ultraviolet and visible radiation.
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JONES, B., FREEMAN, F. & WILSON, R. XUV and Soft X-ray Spectra of the Sun. Nature 219, 252–254 (1968). https://doi.org/10.1038/219252a0
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DOI: https://doi.org/10.1038/219252a0
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