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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 26, issue 5
Ann. Geophys., 26, 1121–1125, 2008
https://doi.org/10.5194/angeo-26-1121-2008
© Author(s) 2008. This work is distributed under
the Creative Commons Attribution 3.0 License.

Special issue: Atmospheric studies by optical methods

Ann. Geophys., 26, 1121–1125, 2008
https://doi.org/10.5194/angeo-26-1121-2008
© Author(s) 2008. This work is distributed under
the Creative Commons Attribution 3.0 License.

  28 May 2008

28 May 2008

First observations from a CCD all-sky spectrograph at Barentsburg (Spitsbergen)

S. A. Chernouss, O. M. Sharovarova, Yu. V. Fedorenko, A. V. Roldugin, and L. S. Yevlashin S. A. Chernouss et al.
  • Polar Geophysical Institute of the Kola Science Centre RAS, Apatity, Murmansk region, 184200 Russia

Abstract. A digital CCD all-sky spectrograph was made by the Polar Geophysical Institute (PGI) to support IPY activity in auroral research. The device was tested at the Barentsburg observatory of PGI during the winter season of 2005–2006. The spectrograph is based on a cooled CCD and a transmission grating. The main features of this spectrograph are: a wide field of view (~180°), a wide spectral range (380–740 nm), a spectral resolution of 0.6 nm, a background level of about 100 R at 1-min exposure time. Several thousand spectra of nightglow and aurora were recorded during the observation season. It was possible to register both the strong auroral emissions, as well as weak ones. Spectra of aurora, including nitrogen and oxygen molecular and atomic emissions, as well as OH emissions of the nightglow are shown. A comparison has been conducted of auroral spectra obtained by the film all-sky spectral camera C-180-S at Spitsbergen during IGY, with spectra obtained at Barentsburg during the last winter season. The relationship between the red (630.0 nm) and green (557.7 nm) auroral emissions shows that the green emission is dominant near the minimum of the solar cycle activity (2005–2006). The opposite situation is observed during 1958–1959, with a maximum solar cycle activity.

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