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Mesospheric winds derived from SuperDARN HF radar meteor echoes at Halley, Antarctica

机译:SuperDARN HF雷达流星回声产生的中层风在南极州的哈雷

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Mesospheric winds are derived from HF radar observations of meteor echoes at Halley (76°S, 27°W), Antarctica. These meteor echoes are observed within the first range gates of the radar (less than 500 km) and are characterised by lower spectral widths than echoes backscattered from plasma irregularities in the E region of the ionosphere. The derived winds show first order agreement with mesospheric winds measured independently over Halley. Gravity wave signatures (e.g. <2-h period) and smaller-scale structure in the winds are revealed within the spatiotemporal data formed by the 16 beams. A data base of such observations is being built up from existing radar data extending over nearly a full solar cycle from 1988 to the present day.
机译:中层风来自南极哈雷(76°S,27°W)的HF雷达对流星回声的观测。这些流星回声是在雷达的第一个测距门(小于500 km)内观测到的,其特征是光谱宽度比电离层E区域中由于等离子体不规则性而回散射的回波要小。导出的风与在哈雷上独立测量的中层风显示一阶一致。在由16束波束形成的时空数据中揭示了重力波签名(例如<2-h周期)和风中的小尺度结构。从1988年至今的几乎整个太阳周期内,现有雷达数据正在建立此类观测的数据库。

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