Abstract

The results of studies of the solar spectrum made from rockets and extending from the ultraviolet to soft x-rays are reviewed. Experiments with spectrographs have given the solar intensity distribution to 2000A, the Fraunhofer spectrum to 2300A with varying resolution reaching 0.6A above 2630A, and the magnesium doublet at 2800A with intense emission cores. The vertical distribution of ozone was determined to 70 km and found to be in agreement with a photochemical calculation. Diurnal heating in the ozone layer was calculated. The intensity of Lyman alpha of hydrogen, 1216A, was measured with photon counters and with a thermoluminescent phosphor, and solar x-rays from 5–7A were observed by these methods and also by direct photography through filters. The absorption of x-rays was found to occur in the E-layer and must account, at least in part, for its production.

© 1953 Optical Society of America

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