Sky Photometer For Ground-Based Coronal Photography

J. E. Graves; A. L. Widener

doi:10.1117/12.959486

1 January 1980 Sky Photometer For Ground-Based Coronal Photography

J. E. Graves, A. L. Widener

Proceedings Volume 0252, Smart Sensors II; (1980) https://doi.org/10.1117/12.959486
Event: 24th Annual Technical Symposium, 1980, San Diego, United States

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.

Citation Download Citation

J. E. Graves and A. L. Widener "Sky Photometer For Ground-Based Coronal Photography", Proc. SPIE 0252, Smart Sensors II, (1 January 1980); https://doi.org/10.1117/12.959486

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