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The Effects of Atmospheric Dispersion on High-Resolution Solar Spectroscopy | | Kevin P. Reardon
; 10.1007/s11207-006-0283-2
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10 Jan 2007 | | Journal: | Solar Physics, 2006, v. 239, p. 203 | | Abstract: | We investigate the effects of atmospheric dispersion on observations of the Sun at the ever-higher spatial resolutions afforded by increased apertures and improved techniques. The problems induced by atmospheric refraction are particularly significant for solar physics because the Sun is often best observed at low elevations, and the effect of the image displacement is not merely a loss of efficiency, but the mixing of information originating from different points on the solar surface. We calculate the magnitude of the atmospheric dispersion for the Sun during the year and examine the problems produced by this dispersion in both spectrographic and filter observations. We describe an observing technique for scanning spectrograph observations that minimizes the effects of the atmospheric dispersion while maintaining a regular scanning geometry. Such an approach could be useful for the new class of high-resolution solar spectrographs, such as SPINOR, POLIS, TRIPPEL, and ViSP. | | Source: | arXiv, astro-ph/0701303 | | Services: | Forum | Review | PDF | Favorites | |
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