The meridional thermospheric neutral wind measured by radar and optical techniques in the auroral region

Computer Science – Sound

Scientific paper

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Auroral Zones, Fabry-Perot Interferometers, Incoherent Scatter Radar, Meridional Flow, Thermosphere, Wind Measurement, F Region, Geomagnetism, Ion Motion, Ionospheric Sounding, Meteorological Radar, Radar Measurement, Solar Terrestrial Interactions, Wind Variations

Scientific paper

The theory and results of radar and Fabry-Perot interferometer scans of meridional winds are presented. The radar data were taken from Chatinika, AK, and the interferometry from the Michigan Airglow Observatory. An analytical model accounted for the effects of atomic and molecular ions on the radar signals, which were directed at the magnetic zenith. The interferometric data were gathered at nighttime with the instrument aimed at the auroral displays and tuned to 6300 A and nearby argon lines. Comparisons were also made of F region data gleaned with radar and interferometer stations 38 km apart. The data agreed in the absence of vertical winds. Radar revealed a net equatorward flow in the F region winds that were stronger in the summer hemisphere. The heating source was not identified.

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