Angular dependence of pump‐induced bottomside and topside ionospheric plasma turbulence at EISCAT
Angular dependence of pump‐induced bottomside and topside ionospheric plasma turbulence at EISCAT
复制标题
EISCAT 泵引起的底部和顶部电离层等离子体湍流的角度依赖性
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
S. Nozawa
中科院分区：
文献类型：
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作者：
M. Kosch;E. Mjølhus;M. Ashrafi;M. Rietveld;T. Yeoman;S. Nozawa
[1]我们实验观察的位置和角尺寸的高频（HF）无线电窗口在底部电离层，这使得无线电波传播到顶部电离层，具有高的角分辨率在欧洲非相干散射（EISCAT）设施。EISCAT UHF非相干散射雷达在电离层底侧和顶侧观测到了HF泵浦引起的离子线增强。雷达天顶角在磁子午线上以小步长扫描。HF泵的占空比故意保持足够低，以最大限度地减少人为场对准不规则性的增长。底侧无线电窗口和顶侧增强雷达回波的位置与使用观测到的等离子体密度进行射线追踪确定的预期位置一致。
[1] We experimentally observe the location and angular size of the high-frequency (HF) radio window in the bottomside ionosphere, which permits radio wave propagation to the topside ionosphere, with high angular resolution at the European Incoherent Scatter (EISCAT) facility. HF pump-induced ion line enhancements were observed by the EISCAT UHF incoherent scatter radar on the ionospheric bottomside and topside. The radar zenith angle was scanned in small steps in the magnetic meridian. The HF pump duty cycle was deliberately kept low enough to minimize the growth of artificial field-aligned irregularities. The locations of the bottomside radio window and topside enhanced radar echoes are consistent with the expected position determined by ray tracing performed using the observed plasma densities.