Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980spie..252...82g&link_type=abstract
In: Smart sensors II; Proceedings of the Seminar, San Diego, CA, July 31, August 1, 1980. (A81-39605 18-35) Bellingham, WA, Soci
Astronomy and Astrophysics
Astronomy
Astronomical Photography, Coronagraphs, Ground Stations, Photometers, Sky Brightness, Solar Corona, Atmospheric Scattering, Electronic Control, Light Scattering, Microprocessors, Radiation Detectors, Remote Sensors, Solar Limb
Scientific paper
In photographing the solar corona from a ground-based coronagraph, the scattered light present in the earth's atmosphere greatly affects the exposure times. Described in this paper is a sky photometer used to sample the sky brightness to within 0.3 solar radius of the solar limb, crucially important for precisely sensing the coronal field background. The detector used is a commercially available MCC-401 optical detector set up to oscillate according to the amount of light falling upon it. The output of this detector is then used to regulate the exposure times via the 6502 micro-processor controlling the coronagraph.
Graves Elon J.
Widener Lee A.
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