NASA NTRS · 19770062973
The Lyman alpha coronagraph
Abstract
The rocket-borne Lyman alpha coronagraph (RLAC) is to be used in the absence of a natural solar eclipse to determine coronal temperatures from measurements of the line width of Lyman-alpha and to determine neutral hydrogen densities of coronal material from the absolute intensity. The coronagraph consists of a 75-cm Fastie-Ebert scanning spectrometer with an AMR 641 photoelectric detection system, an off-axis parabolic primary mirror, and an occulting system. A special optical arrangement achieves rejection of radiation from the solar disk.
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Kohl, J. L., Reeves, E. M., Kirkham, B.. 1977-06-01. The Lyman alpha coronagraph. https://ntrs.nasa.gov/citations/19770062973
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