Simultaneous observations of E‐region coherent backscatter and electric field amplitude at F‐region heights with the Millstone Hill UHF Radar
Simultaneous observations of E‐region coherent backscatter and electric field amplitude at F‐region heights with the Millstone Hill UHF Radar
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DOI：
10.1029/2000gl000042
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发表时间：
2000-10
影响因子：
5.2
通讯作者：
John C. Foster;P. J. Erickson
中科院分区：
文献类型：
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作者：
John C. Foster;P. J. Erickson
利用Millstone Hill UHF雷达进行的联合相干后向散射-非相干散射实验提供了对同一L壳上电场大小和相干后向散射参数的同时观测。一个精心设计的几何使用旁瓣相干污染从双流不规则在110公里的高度，出现在范围对应于F区的高度在主波束，结合同时未受污染的F区观测的漂移速度在相邻的距离门。对数相干功率和相干相速度Vph的大小都随λ线性变化。假设相干相速度近似为加热E区中的扰动离子声速，我们发现从Vph推断的电子温度与先前将E区Te与E相关的非相干散射结果之间非常一致。已经发现这种波致E区加热的最大值为3100 K。
A combined coherent backscatter‐incoherent scatter experiment with the Millstone Hill UHF radar provided simultaneous observations of electric field magnitude and coherent backscatter parameters on the same L shell. A carefully‐designed geometry used sidelobe coherent contamination from two‐stream irregularities at 110 km altitude, appearing at ranges corresponding to F‐region altitudes in the main beam, in conjunction with simultaneous uncontaminated F‐region observations of the drift velocity in adjacent range gates. Both logarithmic coherent power and the magnitude of the coherent phase velocity Vph vary linearly with . With the assumption that the coherent phase velocity is approximately the perturbed ion sound speed in the heated E region, we find an excellent agreement between the electron temperature inferred from Vph and previous incoherent‐scatter results relating E‐region Te to E. A maximum value of ∼3100 K has been found for such wave‐induced E‐region heating.