Abstract
The Goddard Space Flight Center instrument carried on the pointed section of the OSO-7 satellite is described. This instrument contains: An extreme ultraviolet spectroheliograph using glancing incidence optics of Wolter's Type II to focus the Sun's light on the entrance slit of a concave grating spectrometer; an auxiliary Hα system; two X-ray spectroheliographs using mechanical collimators for spatial resolution and Ross filters to isolate spectral bands of interest, and a flare polarimeter operating in the 15–40 keV X-ray region. These subsystems may be operated in a number of modes which, when combined with the spacecraft modes, give the instrument great flexibility for making solar observations. Representative results from each of the subsystems are presented.
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Underwood, J.H., Neupert, W.M. The GSFC EUV and X-ray spectroheliograph on OSO-7. Sol Phys 35, 241–258 (1974). https://doi.org/10.1007/BF00151946
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DOI: https://doi.org/10.1007/BF00151946