Mathematics
Scientific paper
Dec 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975jatp...37.1511f&link_type=abstract
Journal of Atmospheric and Terrestrial Physics, vol. 37, Dec. 1975, p. 1511-1524.
Mathematics
2
Atmospheric Tides, Diurnal Variations, Lower Ionosphere, Radar Data, Radio Meteors, Wave Propagation, Amplitude Distribution Analysis, Annual Variations, Graphs (Charts), Harmonic Analysis, Phase Shift, Regression Analysis, Spectrum Analysis, Superposition (Mathematics)
Scientific paper
Data from the Garchy meteor radar are used to construct a detailed picture of the general mean and seasonal averages of the semi-diurnal and diurnal tides in the 80-100 km altitude range. The semi-diurnal tide is generally dominated by the fundamental S(2 omega) sub 2, 2 mode, but higher-order modes prevail in winter, and spring and autumn averages cannot both be described by a single 'equinoctial' model. The diurnal tide is alternately dominated by the S(omega) sub 1, 1 mode and by evanescent modes (in summer). Comparisons with theoretical predictions show severe discrepancies. Short-term variations of the tides are investigated with the help of two-dimensional spectral analysis and regression methods. Several cases of complex tidal structure can be interpreted as reflection or wave superposition phenomena.
Bernard Rémi
Fellous Jean-Louis
Glass Mel
Massebeuf M.
Spizzichino Aldo
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