14 February 2008 Earth's atmosphere distorting influence when observing Sun oscillatory-wave processes
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Proceedings Volume 6936, Fourteenth International Symposium on Atmospheric and Ocean Optics/Atmospheric Physics; 69360S (2008) https://doi.org/10.1117/12.783167
Event: Fourteenth International Symposium on Atmospheric and Ocean Optics/Atmospheric Physics, 2007, Buryatia, Russian Federation
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.
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Sergey A. Chupin, Sergey A. Chupin, Nikolai I. Kobanov, Nikolai I. Kobanov, } "Earth's atmosphere distorting influence when observing Sun oscillatory-wave processes", Proc. SPIE 6936, Fourteenth International Symposium on Atmospheric and Ocean Optics/Atmospheric Physics, 69360S (14 February 2008); doi: 10.1117/12.783167; https://doi.org/10.1117/12.783167
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