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Measurements of solar extreme ultraviolet radiation in the wavelength range 1310–270 A have been made from the satellite Oso 3. The flux variation over a solar rotation period was obtained for emission lines representing elements in various stages of ionization. Since no correction need be made for atmospheric absorption, the accuracy of these results is superior to the accuracy of the results we previously obtained with similar instrumentation aboard rocket vehicles.
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Hall et al. (1970) studied this question.
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