Abstract
Doppler measurements at mesospheric heights were carried out in June 1984 using the mobile SOUSY VHF radar at Andenes/Norway (69°N, 16°E). The temporal wind variations at heights between 80 and 95 km reveal wave motions with periods of about 12 h, 14.5 h, 24 h and 54 h. The propagating semi-diurnal tide has amplitudes up to 20 m s −1 and a vertical wavelength of about 30 km. The diurnal tide is much weaker and the phase shows a more complex variation with height. The 14.5 h period motion reveals a maximum amplitude of 15 m s −1 at about 84 km and a vertical wavelength of 15 km.
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