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Proceedings Paper

Sky Photometer For Ground-Based Coronal Photography
Author(s): J. E. Graves; A. L. Widener
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Paper Abstract

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 .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.

Paper Details

Date Published: 1 January 1980
PDF: 3 pages
Proc. SPIE 0252, Smart Sensors II, (1 January 1980); doi: 10.1117/12.959486
Show Author Affiliations
J. E. Graves, Sacramento Peak Observatory (United States)
A. L. Widener, Sacramento Peak Observatory, (United States)

Published in SPIE Proceedings Vol. 0252:
Smart Sensors II
David F. Barbe, Editor(s)

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