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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Volume 36, issue 3
Ann. Geophys., 36, 705-715, 2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue: Space weather connections to near-Earth space and the...

Ann. Geophys., 36, 705-715, 2018
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Regular paper 04 May 2018

Regular paper | 04 May 2018

Determination of gravity wave parameters in the airglow combining photometer and imager data

Prosper K. Nyassor1, Ricardo Arlen Buriti1, Igo Paulino1, Amauri F. Medeiros1, Hisao Takahashi2, Cristiano M. Wrasse2, and Delano Gobbi2 Prosper K. Nyassor et al.
  • 1Unidade Acadêmica de Física, Universidade Federal de Campina Grande, Campina Grande, PB, Brazil
  • 2Divisao de Aeronomia, Instituto Nacional de Pesquisas Espaciais, Sa.o Jose. dos Campos, SP, Brazil

Abstract. Mesospheric airglow measurements of two or three layers were used to characterize both vertical and horizontal parameters of gravity waves. The data set was acquired coincidentally from a multi-channel filter (Multi-3) photometer and an all-sky imager located at São João do Cariri (7.4°S, 36.5°W) in the equatorial region from 2001 to 2007. Using a least-square fitting and wavelet analysis technique, the phase and amplitude of each observed wave were determined, as well as the amplitude growth. Using the dispersion relation of gravity waves, the vertical and horizontal wavelengths were estimated and compared to the horizontal wavelength obtained from the keogram analysis of the images observed by an all-sky imager. The results show that both horizontal and vertical wavelengths, obtained from the dispersion relation and keogram analysis, agree very well for the waves observed on the nights of 14 October and 18 December 2006. The determined parameters showed that the observed wave on the night of 18 December 2006 had a period of  ∼  43.8  ±  2.19min, with the horizontal wavelength of 235.66  ±  11.78km having a downward phase propagation, whereas that of 14 October 2006 propagated with a period of  ∼  36.00  ±  1.80min with a horizontal wavelength of  ∼  195 ±  9.80km, and with an upward phase propagation. The observation of a wave taken by a photometer and an all-sky imager allowed us to conclude that the same wave could be observed by both instruments, permitting the investigation of the two-dimensional wave parameter.

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