High-atmosphere wind profiles for altitudes between 90 and 110 km obtained from D1 LF measurements over Central Europe in 1983/1984

Computer Science – Sound

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Ionospheric Sounding, Low Frequencies, Lower Ionosphere, Wind Measurement, Wind Profiles, Annual Variations, Central Europe, Vertical Distribution, Wind Velocity

Scientific paper

Based on simultaneous reflection height measurements and regular daily nightime Dl LF wind measurements, accurate yearly height-time cross-sections of the general circulation at altitudes between 90 and 110 km over Central Europe have been obtained for the period March 1983 to October 1984. Average monthly vertical profile calculations for the prevailaing and the semidiurnal tidal wind components are found to be possible if the wind field does not vary significantly over the averaging period, for which case the data must be separated into suitable intervals with approximately uniform wind conditions. Day-to-day wind field variability is determined by simple harmonic analysis of the daily wind variations, which must then be assigned to an average nighttime reflection height.

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