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首页> 外文期刊>Geophysical Research Letters >Radar measurements of electric fields in the topside of the equatorial electrojet: First results
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Radar measurements of electric fields in the topside of the equatorial electrojet: First results

机译:赤道电喷流顶部雷达的电场测量:初步结果

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摘要

We show that the vertical polarization electric field (E-p) in the topside of the equatorial electrojet can be determined from the Doppler spectra of type-2 echoes obtained with a radar that is appropriately displaced in latitude from the magnetic dip equator. Using a 49.92 MHz radar on Christmas Island (2.9 degrees magnetic dip latitude), we found unexpectedly large E-p at altitudes at least as high as 120 km over the dip equator. Another new and related finding is the transient appearance of type-1 echoes at 99 km over Christmas Island, which likely was produced by an E-p of at least 11 mV/m that must have appeared at 114 km altitude over the dip equator. Elevated electron temperatures inferred from the type-1 Doppler spectra are consistent with the presence of anomalous energetics. [References: 13]
机译:我们显示,赤道电喷流顶部的垂直极化电场(E-p)可以从使用从磁倾角赤道纬度适当偏移的雷达获得的2型回波的多普勒光谱中确定。在圣诞节岛(2.9度倾角纬度)上使用49.92 MHz雷达,我们发现在倾角赤道上至少高达120 km的高度出乎意料的大E-p。另一个新的相关发现是圣诞节岛上方99 km处的1型回波的瞬时出现,这很可能是由至少11 mV / m的E-p产生的,该E-p必须在俯仰赤道的114 km高度处出现。从1型多普勒光谱推断出的电子温度升高与异常能量学的存在是一致的。 [参考:13]

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