Abstract
A spirit level is used to get precise orientation of single solar images taken with a direct pointing photographic or CCD heliograph. A brief discussion of the alignment of this device and of the instrumental errors is given.
References
Dezsö L., Gerlei, O., Kovacs A.: 1987,Debrecen Photoheliographic Results for the Year 1977, pp 25–27
Pettauer T.: 1990, inThe Dynamic Sun, ed. L. Dezsö, Publ. Debrecen Heliophys. Obs., Vol. 7, pp 62–63
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Pettauer, T. A device for precise orientation of solar images. Sol Phys 155, 195–198 (1994). https://doi.org/10.1007/BF00670739
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DOI: https://doi.org/10.1007/BF00670739