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Proceedings Paper

Earth's atmosphere distorting influence when observing Sun oscillatory-wave processes
Author(s): Sergey A. Chupin; Nikolai I. Kobanov
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Paper Abstract

When carrying out optical observations of the sun using ground-based instruments, the main cause of error is the Earth's atmosphere. Daytime seeing will be best on two conditions: low gradients in the parameters of the Earth's atmosphere along the line-of-sight and high transparency (negligible stray light). Telluric line shifts caused by atmospheric instabilities were studied. Besides that, the influence of such parameters as atmospheric pressure and aerosol concentrations on daytime seeing were examined. Seeing was determined using a spectrogram. Analysis of the Fourier spectra of telluric line shifts revealed that seeing is mainly influenced by high-frequency turbulence in the Earth's atmosphere in the 0.1-4 Hz range (0.25-10 sec period). Study of the dependence of the stability of the Earth's atmosphere on aerosol concentration and pressure showed that the influence of aerosols was more expressed than that of pressure. It would appear that aerosols promote flattening of temperature gradients in the Earth's atmosphere and in this way improve conditions for solar observations.

Paper Details

Date Published: 14 February 2008
PDF: 8 pages
Proc. SPIE 6936, Fourteenth International Symposium on Atmospheric and Ocean Optics/Atmospheric Physics, 69360S (14 February 2008); doi: 10.1117/12.783167
Show Author Affiliations
Sergey A. Chupin, Institute of Solar-Terrestrial Physics (Russia)
Nikolai I. Kobanov, Institute of Solar-Terrestrial Physics (Russia)

Published in SPIE Proceedings Vol. 6936:
Fourteenth International Symposium on Atmospheric and Ocean Optics/Atmospheric Physics

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