1 September 1974 The High Altitude Observatory White Light Coronagraph
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Abstract
Most of the instruments of the Apollo Telescope Mount are satellite-borne because they observe in regions of the electromag-netic spectrum where the telluric atmosphere is opaque. For the coronagraph of the High Altitude Observatory, observing in visible light, this is not so. The structure of the solar corona is obscured from ground-based observations by scattered light in the earth's atmosphere, and observations from space are required to reduce this scattered light to a level which is negligible with respect to the brightness of the outer solar corona.
© (1974) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
R. M. MacQueen, J. T . Gosling, E. Hildner, R. H. Munro, A. I. Poland, C. L. Ross, "The High Altitude Observatory White Light Coronagraph", Proc. SPIE 0044, Instrumentation in Astronomy II, (1 September 1974); doi: 10.1117/12.953943; https://doi.org/10.1117/12.953943
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