Studies of the ionospheric turbulence excited by the fourth gyroharmonic at HAARP
Studies of the ionospheric turbulence excited by the fourth gyroharmonic at HAARP
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HAARP第四次回旋谐波激发的电离层湍流研究
DOI：
10.1002/2015ja021341
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
K. Papadopoulos
中科院分区：
文献类型：
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作者：
A. Najmi;G. Milikh;Y. Yampolski;A. Koloskov;A. Sopin;A. Zalizovski;P. Bernhardt;S. Briczinski;C. Siefring;K. Chiang;Y. Morton;S. Taylor;A. Mahmoudian;W. Bristow;M. Ruohoniemi;K. Papadopoulos
本文介绍了在高频有源极光研究计划（HAARP）中，利用接近四阶电子回旋谐波的频率，在宽的辐射功率范围内，采用多种不同的诊断方法，对高频加热引起的人工电离层湍流（AIT）进行的研究。诊断包括GPS定位、地面受激电磁发射（SEE）、HAARP电离层探测仪、科迪亚克雷达和乌克兰南极站（UAS）接收的信号。后者允许分析由AIT散射到电离层波导沿着地球的终止器，15.6毫米的HAARP设施。第一次，两个突出的SEE功能，下移的最大值和广泛的上移的最大值的幅度，被观察到饱和的最大HAARP有效辐射功率的50%。观察到在不同发射频率和泵浦波强度下，倾斜总电子含量、SEE和UAS接收信号的非线性效应。来自不同探测器的数据之间的相关性表明，散射波到达UAS的波导沿着地球的终结者，他们被注入到波导由AIT以上HAARP产生的人工条纹的散射，而不是通过从旁瓣辐射直接注入。
A study is presented of artificial ionospheric turbulence (AIT) induced by HF heating at High Frequency Active Auroral Research Program (HAARP) using frequencies close to the fourth electron gyroharmonic, in a broad range of radiated powers and using a number of different diagnostics. The diagnostics include GPS scintillations, ground‐based stimulated electromagnetic emission (SEE), the HAARP ionosonde, Kodiak radar, and signals received at the Ukrainian Antarctic Station (UAS). The latter allowed analysis of waves scattered by the AIT into the ionospheric waveguide along Earth's terminator, 15.6 mm from the HAARP facility. For the first time, the amplitudes of two prominent SEE features, the downshifted maximum and broad upshifted maximum, were observed to saturate at ~50% of the maximum HAARP effective radiated power. Nonlinear effects in slant total electron content, SEE, and signals received at UAS at different transmitted frequencies and intensities of the pump wave were observed. The correlations between the data from different detectors demonstrate that the scattered waves reach UAS by the waveguide along the Earth's terminator, and that they were injected into the waveguide by scattering off of artificial striations produced by AIT above HAARP, rather than via direct injection from sidelobe radiation.